<?php
/**
 * Admin interface class
 */
class TWP_Admin {
    
    private $plugin_name;
    private $version;
    
    /**
     * Constructor
     */
    public function __construct($plugin_name, $version) {
        $this->plugin_name = $plugin_name;
        $this->version = $version;
    }
    
    /**
     * Register admin menu
     */
    public function add_plugin_admin_menu() {
        // Determine if user has any agent access
        $has_agent_access = current_user_can('twp_access_voicemails') ||
                           current_user_can('twp_access_call_log') ||
                           current_user_can('twp_access_agent_queue') ||
                           current_user_can('twp_access_sms_inbox') ||
                           current_user_can('twp_access_browser_phone');
        
        // Only show menu if user is admin or has agent access
        if (!current_user_can('manage_options') && !$has_agent_access) {
            return;
        }
        
        // Determine first available page for agents
        $first_page = 'twilio-wp-browser-phone'; // Default to browser phone
        if (current_user_can('twp_access_voicemails')) $first_page = 'twilio-wp-voicemails';
        elseif (current_user_can('twp_access_call_log')) $first_page = 'twilio-wp-call-logs';
        elseif (current_user_can('twp_access_agent_queue')) $first_page = 'twilio-wp-agent-queue';
        elseif (current_user_can('twp_access_sms_inbox')) $first_page = 'twilio-wp-sms-inbox';
        elseif (current_user_can('twp_access_browser_phone')) $first_page = 'twilio-wp-browser-phone';
        
        // Main menu - show dashboard for admins, redirect to first available page for agents
        if (current_user_can('manage_options')) {
            add_menu_page(
                'Twilio WP Plugin',
                'Twilio Phone',
                'manage_options',
                'twilio-wp-plugin',
                array($this, 'display_plugin_dashboard'),
                'dashicons-phone',
                30
            );
            
            add_submenu_page(
                'twilio-wp-plugin',
                'Dashboard',
                'Dashboard',
                'manage_options',
                'twilio-wp-plugin',
                array($this, 'display_plugin_dashboard')
            );
        } else {
            add_menu_page(
                'Twilio Phone',
                'Twilio Phone',
                'read',
                $first_page,
                null,
                'dashicons-phone',
                30
            );
        }
        
        // Admin-only pages
        if (current_user_can('manage_options')) {
            add_submenu_page(
                'twilio-wp-plugin',
                'Settings',
                'Settings',
                'manage_options',
                'twilio-wp-settings',
                array($this, 'display_plugin_settings')
            );
            
            add_submenu_page(
                'twilio-wp-plugin',
                'Phone Schedules',
                'Schedules',
                'manage_options',
                'twilio-wp-schedules',
                array($this, 'display_schedules_page')
            );
            
            add_submenu_page(
                'twilio-wp-plugin',
                'Workflows',
                'Workflows',
                'manage_options',
                'twilio-wp-workflows',
                array($this, 'display_workflows_page')
            );
            
            add_submenu_page(
                'twilio-wp-plugin',
                'Call Queues',
                'Queues',
                'manage_options',
                'twilio-wp-queues',
                array($this, 'display_queues_page')
            );
            
            add_submenu_page(
                'twilio-wp-plugin',
                'Phone Numbers',
                'Phone Numbers',
                'manage_options',
                'twilio-wp-numbers',
                array($this, 'display_numbers_page')
            );
            
            add_submenu_page(
                'twilio-wp-plugin',
                'Agent Groups',
                'Agent Groups',
                'manage_options',
                'twilio-wp-groups',
                array($this, 'display_groups_page')
            );
        }
        
        // Agent-accessible pages
        $menu_parent = current_user_can('manage_options') ? 'twilio-wp-plugin' : $first_page;
        
        if (current_user_can('manage_options') || current_user_can('twp_access_voicemails')) {
            add_submenu_page(
                $menu_parent,
                'Voicemails',
                'Voicemails',
                current_user_can('manage_options') ? 'manage_options' : 'twp_access_voicemails',
                'twilio-wp-voicemails',
                array($this, 'display_voicemails_page')
            );
        }
        
        if (current_user_can('manage_options') || current_user_can('twp_access_call_log')) {
            add_submenu_page(
                $menu_parent,
                'Call Logs',
                'Call Logs',
                current_user_can('manage_options') ? 'manage_options' : 'twp_access_call_log',
                'twilio-wp-call-logs',
                array($this, 'display_call_logs_page')
            );
        }
        
        if (current_user_can('manage_options') || current_user_can('twp_access_agent_queue')) {
            add_submenu_page(
                $menu_parent,
                'Agent Queue',
                'Agent Queue',
                current_user_can('manage_options') ? 'manage_options' : 'twp_access_agent_queue',
                'twilio-wp-agent-queue',
                array($this, 'display_agent_queue_page')
            );
        }
        
        // Outbound Calls page removed - functionality merged into Browser Phone
        // Keeping capability 'twp_access_outbound_calls' for backwards compatibility
        
        if (current_user_can('manage_options') || current_user_can('twp_access_sms_inbox')) {
            add_submenu_page(
                $menu_parent,
                'SMS Inbox',
                'SMS Inbox',
                current_user_can('manage_options') ? 'manage_options' : 'twp_access_sms_inbox',
                'twilio-wp-sms-inbox',
                array($this, 'display_sms_inbox_page')
            );
        }
        
        if (current_user_can('manage_options') || current_user_can('twp_access_browser_phone')) {
            add_submenu_page(
                $menu_parent,
                'Browser Phone',
                'Browser Phone',
                current_user_can('manage_options') ? 'manage_options' : 'twp_access_browser_phone',
                'twilio-wp-browser-phone',
                array($this, 'display_browser_phone_page')
            );
        }
    }
    
    /**
     * Display dashboard
     */
    public function display_plugin_dashboard() {
        ?>
        <div class="wrap">
            <h1>Twilio Phone System Dashboard</h1>
            
            <div class="twp-dashboard">
                <div class="twp-stats-grid">
                    <div class="twp-stat-card">
                        <h3>Active Calls</h3>
                        <div class="twp-stat-value" id="active-calls">0</div>
                    </div>
                    
                    <div class="twp-stat-card">
                        <h3>Calls in Queue</h3>
                        <div class="twp-stat-value" id="queued-calls">0</div>
                    </div>
                    
                    <div class="twp-stat-card">
                        <h3>Active Schedules</h3>
                        <div class="twp-stat-value" id="active-schedules">
                            <?php
                            global $wpdb;
                            $table = $wpdb->prefix . 'twp_phone_schedules';
                            echo $wpdb->get_var("SELECT COUNT(*) FROM $table WHERE is_active = 1");
                            ?>
                        </div>
                    </div>
                    
                    <div class="twp-stat-card">
                        <h3>Active Workflows</h3>
                        <div class="twp-stat-value" id="active-workflows">
                            <?php
                            global $wpdb;
                            $table = $wpdb->prefix . 'twp_workflows';
                            echo $wpdb->get_var("SELECT COUNT(*) FROM $table WHERE is_active = 1");
                            ?>
                        </div>
                    </div>
                </div>
                
                <div class="twp-recent-activity">
                    <h2>Recent Call Activity</h2>
                    <table class="wp-list-table widefat fixed striped">
                        <thead>
                            <tr>
                                <th>Time</th>
                                <th>From</th>
                                <th>To</th>
                                <th>Status</th>
                                <th>Duration</th>
                            </tr>
                        </thead>
                        <tbody id="recent-calls">
                            <tr>
                                <td colspan="5">No recent calls</td>
                            </tr>
                        </tbody>
                    </table>
                </div>
            </div>
        </div>
        <?php
    }
    
    /**
     * Display settings page
     */
    public function display_plugin_settings() {
        ?>
        <div class="wrap">
            <h1>Twilio WP Plugin Settings</h1>
            
            <form method="post" action="options.php">
                <?php settings_fields('twilio-wp-settings-group'); ?>
                
                <h2>Twilio API Settings</h2>
                <table class="form-table">
                    <tr>
                        <th scope="row">Account SID</th>
                        <td>
                            <input type="text" name="twp_twilio_account_sid" 
                                   value="<?php echo esc_attr(get_option('twp_twilio_account_sid')); ?>" 
                                   class="regular-text" />
                            <p class="description">Your Twilio Account SID</p>
                        </td>
                    </tr>
                    
                    <tr>
                        <th scope="row">Auth Token</th>
                        <td>
                            <input type="password" name="twp_twilio_auth_token" 
                                   value="<?php echo esc_attr(get_option('twp_twilio_auth_token')); ?>" 
                                   class="regular-text" />
                            <p class="description">Your Twilio Auth Token</p>
                        </td>
                    </tr>
                    
                    <tr>
                        <th scope="row">TwiML App SID</th>
                        <td>
                            <input type="text" name="twp_twiml_app_sid" 
                                   value="<?php echo esc_attr(get_option('twp_twiml_app_sid')); ?>" 
                                   class="regular-text" />
                            <p class="description">TwiML Application SID for Browser Phone (optional). <a href="#twiml-app-instructions">See setup instructions below</a></p>
                        </td>
                    </tr>
                    
                </table>
                
                <h2>Eleven Labs API Settings</h2>
                <table class="form-table">
                    <tr>
                        <th scope="row">API Key</th>
                        <td>
                            <input type="password" name="twp_elevenlabs_api_key" 
                                   value="<?php echo esc_attr(get_option('twp_elevenlabs_api_key')); ?>" 
                                   class="regular-text" />
                            <p class="description">Your Eleven Labs API Key</p>
                        </td>
                    </tr>
                    
                    <tr>
                        <th scope="row">Model</th>
                        <td>
                            <select name="twp_elevenlabs_model_id" id="elevenlabs-model-select" class="regular-text">
                                <option value="">Select a model...</option>
                                <option value="eleven_multilingual_v2" <?php selected(get_option('twp_elevenlabs_model_id', 'eleven_multilingual_v2'), 'eleven_multilingual_v2'); ?>>
                                    Multilingual v2 (Recommended)
                                </option>
                                <option value="eleven_monolingual_v1" <?php selected(get_option('twp_elevenlabs_model_id'), 'eleven_monolingual_v1'); ?>>
                                    Monolingual v1
                                </option>
                                <option value="eleven_multilingual_v1" <?php selected(get_option('twp_elevenlabs_model_id'), 'eleven_multilingual_v1'); ?>>
                                    Multilingual v1
                                </option>
                                <option value="eleven_turbo_v2" <?php selected(get_option('twp_elevenlabs_model_id'), 'eleven_turbo_v2'); ?>>
                                    Turbo v2 (Faster)
                                </option>
                            </select>
                            <button type="button" class="button" onclick="loadElevenLabsModels()">Load Available Models</button>
                            <p class="description">Text-to-speech model to use. Multilingual v2 is recommended for best quality. Turbo v2 offers faster generation.</p>
                        </td>
                    </tr>
                    
                    <tr>
                        <th scope="row">Default Voice</th>
                        <td>
                            <select name="twp_elevenlabs_voice_id" id="elevenlabs-voice-select" class="regular-text" 
                                    data-current="<?php echo esc_attr(get_option('twp_elevenlabs_voice_id')); ?>">
                                <option value="">Select a voice...</option>
                                <?php 
                                $current_voice = get_option('twp_elevenlabs_voice_id');
                                if ($current_voice): ?>
                                    <option value="<?php echo esc_attr($current_voice); ?>" selected>
                                        Current Voice (<?php echo esc_html($current_voice); ?>)
                                    </option>
                                <?php endif; ?>
                            </select>
                            <button type="button" class="button" onclick="loadElevenLabsVoices()">Load Voices</button>
                            <p class="description">Default voice for text-to-speech. Click "Load Voices" after entering your API key.</p>
                            <?php if (WP_DEBUG): ?>
                                <p class="description"><small>Debug: Current saved voice ID = "<?php echo esc_html(get_option('twp_elevenlabs_voice_id', 'empty')); ?>"</small></p>
                            <?php endif; ?>
                        </td>
                    </tr>
                </table>
                
                <h2>Default Queue Settings</h2>
                <table class="form-table">
                    <tr>
                        <th scope="row">Queue Timeout (seconds)</th>
                        <td>
                            <input type="number" name="twp_default_queue_timeout" 
                                   value="<?php echo esc_attr(get_option('twp_default_queue_timeout', 300)); ?>" 
                                   min="30" max="3600" />
                            <p class="description">Default timeout for calls in queue</p>
                        </td>
                    </tr>
                    
                    <tr>
                        <th scope="row">Queue Size</th>
                        <td>
                            <input type="number" name="twp_default_queue_size" 
                                   value="<?php echo esc_attr(get_option('twp_default_queue_size', 10)); ?>" 
                                   min="1" max="100" />
                            <p class="description">Default maximum queue size</p>
                        </td>
                    </tr>
                </table>
                
                <h2>Webhook URLs</h2>
                <table class="form-table">
                    <tr>
                        <th scope="row">Voice Webhook</th>
                        <td>
                            <code><?php echo rest_url('twilio-webhook/v1/voice'); ?></code>
                            <button type="button" class="button" onclick="copyToClipboard('<?php echo rest_url('twilio-webhook/v1/voice'); ?>')">Copy</button>
                        </td>
                    </tr>
                    
                    <tr>
                        <th scope="row">SMS Webhook</th>
                        <td>
                            <code><?php echo rest_url('twilio-webhook/v1/sms'); ?></code>
                            <button type="button" class="button" onclick="copyToClipboard('<?php echo rest_url('twilio-webhook/v1/sms'); ?>')">Copy</button>
                        </td>
                    </tr>
                    
                    <tr>
                        <th scope="row">Status Webhook</th>
                        <td>
                            <code><?php echo rest_url('twilio-webhook/v1/status'); ?></code>
                            <button type="button" class="button" onclick="copyToClipboard('<?php echo rest_url('twilio-webhook/v1/status'); ?>')">Copy</button>
                        </td>
                    </tr>
                    
                    <tr>
                        <th scope="row">Transcription Webhook</th>
                        <td>
                            <code><?php echo rest_url('twilio-webhook/v1/transcription'); ?></code>
                            <button type="button" class="button" onclick="copyToClipboard('<?php echo rest_url('twilio-webhook/v1/transcription'); ?>')">Copy</button>
                            <p class="description">Used for automatic voicemail transcription callbacks</p>
                        </td>
                    </tr>
                </table>
                
                <h2>Voicemail & Transcription Settings</h2>
                <table class="form-table">
                    <tr>
                        <th scope="row">Urgent Keywords</th>
                        <td>
                            <input type="text" name="twp_urgent_keywords" 
                                   value="<?php echo esc_attr(get_option('twp_urgent_keywords', 'urgent,emergency,important,asap,help')); ?>" 
                                   class="large-text" />
                            <p class="description">Comma-separated keywords that trigger urgent notifications when found in voicemail transcriptions. Example: urgent,emergency,important,asap,help</p>
                        </td>
                    </tr>
                    
                    <tr>
                        <th scope="row">SMS Notification Number</th>
                        <td>
                            <input type="text" name="twp_sms_notification_number" 
                                   value="<?php echo esc_attr(get_option('twp_sms_notification_number')); ?>" 
                                   class="regular-text" 
                                   placeholder="+1234567890" />
                            <p class="description">Phone number to receive SMS notifications for urgent voicemails. Use full international format (e.g., +1234567890)</p>
                        </td>
                    </tr>
                    
                    <tr>
                        <th scope="row">Default SMS From Number</th>
                        <td>
                            <select name="twp_default_sms_number" id="default-sms-number" class="regular-text">
                                <option value="">Select a Twilio number...</option>
                                <?php
                                // Get current value
                                $current_sms_number = get_option('twp_default_sms_number');
                                
                                try {
                                    // Get Twilio phone numbers
                                    $twilio = new TWP_Twilio_API();
                                    $numbers_result = $twilio->get_phone_numbers();
                                    
                                    if ($numbers_result['success'] && isset($numbers_result['data']['incoming_phone_numbers'])) {
                                        $numbers = $numbers_result['data']['incoming_phone_numbers'];
                                        if (is_array($numbers) && !empty($numbers)) {
                                            foreach ($numbers as $number) {
                                                $phone = isset($number['phone_number']) ? $number['phone_number'] : '';
                                                $friendly_name = isset($number['friendly_name']) ? $number['friendly_name'] : $phone;
                                                if (!empty($phone)) {
                                                    $selected = ($phone === $current_sms_number) ? ' selected' : '';
                                                    echo '<option value="' . esc_attr($phone) . '"' . $selected . '>' . esc_html($friendly_name . ' (' . $phone . ')') . '</option>';
                                                }
                                            }
                                        }
                                    }
                                } catch (Exception $e) {
                                    // If there's an error loading numbers, show the current value as a manual input
                                    if (!empty($current_sms_number)) {
                                        echo '<option value="' . esc_attr($current_sms_number) . '" selected>' . esc_html($current_sms_number . ' (configured)') . '</option>';
                                    }
                                }
                                ?>
                            </select>
                            <button type="button" onclick="loadTwilioNumbers('default-sms-number')" class="button" style="margin-left: 10px;">Refresh Numbers</button>
                            <p class="description">Default Twilio phone number to use as sender for SMS messages when not in a workflow context.</p>
                        </td>
                    </tr>
                </table>
                
                <?php submit_button(); ?>
            </form>
            
            <hr>
            
            <h2>Phone Number Maintenance</h2>
            <div class="card">
                <h3>Real-Time Queue Cleanup Configuration</h3>
                <p>Configure individual phone numbers to send status callbacks when calls end, enabling real-time queue cleanup.</p>
                <p><strong>When enabled:</strong> Calls will be removed from queue immediately when callers hang up.</p>
                
                <div id="phone-numbers-list" style="margin: 20px 0;">
                    <p style="color: #666;">Loading phone numbers...</p>
                </div>
                
                <div style="margin-top: 20px; padding-top: 20px; border-top: 1px solid #ddd;">
                    <button type="button" class="button" id="refresh-numbers-btn">
                        Refresh List
                    </button>
                    <button type="button" class="button button-primary" id="update-all-numbers-btn" style="display: none;">
                        Enable for All Numbers
                    </button>
                </div>
                
                <div id="update-result" style="margin-top: 10px;"></div>
            </div>
            
            <hr id="twiml-app-instructions">
            
            <h2>TwiML App Setup for Browser Phone</h2>
            <div class="card">
                <h3>Auto-Configuration (Recommended)</h3>
                <p>Let the plugin automatically set up everything for you:</p>
                <div style="background: #e7f5e7; padding: 15px; border-radius: 4px; margin-bottom: 20px;">
                    <div style="margin-bottom: 15px;">
                        <button type="button" id="auto-configure-btn" class="button button-primary button-large">
                            🔧 Auto-Configure Browser Phone
                        </button>
                        <button type="button" id="configure-numbers-btn" class="button button-secondary" style="margin-left: 10px;">
                            📞 Configure Phone Numbers Only
                        </button>
                    </div>
                    
                    <div style="margin-bottom: 15px; padding: 15px; background: #fff; border: 1px solid #c3e6cb; border-radius: 4px;">
                        <h4 style="margin-top: 0;">Select Phone Numbers to Configure:</h4>
                        <div id="phone-numbers-selection">
                            <p style="color: #666;">Loading phone numbers...</p>
                        </div>
                        <div style="margin-top: 10px;">
                            <button type="button" id="select-all-numbers" class="button button-small">Select All</button>
                            <button type="button" id="deselect-all-numbers" class="button button-small" style="margin-left: 5px;">Deselect All</button>
                        </div>
                    </div>
                    
                    <div style="margin-bottom: 10px;">
                        <label style="font-weight: bold;">
                            <input type="checkbox" id="enable-smart-routing" checked> 
                            Enable Smart Routing on Selected Numbers
                        </label>
                        <p style="margin: 5px 0 0 25px; color: #666; font-size: 13px;">Routes calls based on agent preferences (browser vs cell phone)</p>
                    </div>
                    <p style="margin: 10px 0 0 0; color: #155724;">
                        <strong>Full Setup:</strong> Create TwiML App, set webhooks, configure selected phone numbers.<br>
                        <strong>Numbers Only:</strong> Configure selected phone numbers with smart routing (requires TwiML App already set up).
                    </p>
                </div>
                <div id="auto-configure-result" style="margin-top: 15px;"></div>
                
                <hr style="margin: 30px 0;">
                
                <h3>Manual Setup Instructions</h3>
                <p>Or follow these steps to set up manually in your Twilio Console:</p>
                
                <div class="setup-steps">
                    <div class="step">
                        <h4>1. Create TwiML Application</h4>
                        <ol>
                            <li>Go to <a href="https://console.twilio.com/us1/develop/voice/manage/twiml-apps" target="_blank">Twilio Console → Voice → TwiML Apps</a></li>
                            <li>Click <strong>"Create new TwiML App"</strong></li>
                            <li>Enter a friendly name: <code>Browser Phone App</code></li>
                            <li>Set Voice URL to: <code><?php echo home_url('/wp-json/twilio-webhook/v1/browser-voice'); ?></code> 
                                <button type="button" class="button button-small" onclick="copyToClipboard('<?php echo home_url('/wp-json/twilio-webhook/v1/browser-voice'); ?>')">Copy</button>
                            </li>
                            <li>Set HTTP Method to: <strong>POST</strong></li>
                            <li>Leave Status Callback URL empty (optional)</li>
                            <li>Click <strong>"Save"</strong></li>
                        </ol>
                    </div>
                    
                    <div class="step">
                        <h4>2. Get TwiML App SID</h4>
                        <ol>
                            <li>After creating the app, copy the <strong>App SID</strong> (starts with <code>AP...</code>)</li>
                            <li>Paste it in the <strong>"TwiML App SID"</strong> field above</li>
                            <li>Click <strong>"Save Changes"</strong></li>
                        </ol>
                    </div>
                    
                    <div class="step">
                        <h4>3. Test Browser Phone</h4>
                        <ol>
                            <li>Go to <strong>Twilio WP Plugin → Browser Phone</strong></li>
                            <li>Wait for status to show <span style="color: #4CAF50;">"Ready"</span></li>
                            <li>Enter a phone number and select caller ID</li>
                            <li>Click <strong>"Call"</strong> to test outbound calling</li>
                        </ol>
                    </div>
                </div>
                
                <div class="setup-info">
                    <h4>How It Works</h4>
                    <ul>
                        <li><strong>Outbound Calls:</strong> Click "Call" to dial any phone number from your browser</li>
                        <li><strong>Incoming Calls:</strong> Calls can be routed to your browser instead of cell phone</li>
                        <li><strong>Call Quality:</strong> Uses your internet connection for high-quality VoIP calls</li>
                        <li><strong>No Cell Phone:</strong> Agents can work entirely from their computer</li>
                    </ul>
                </div>
                
                <div class="troubleshooting">
                    <h4>Troubleshooting</h4>
                    <ul>
                        <li><strong>"valid callerId must be provided":</strong> 
                            <ul>
                                <li>Make sure you select a Caller ID before calling</li>
                                <li>The Caller ID must be a phone number you own in Twilio</li>
                                <li>Go to <a href="https://console.twilio.com/us1/develop/phone-numbers/manage/incoming" target="_blank">Twilio Console → Phone Numbers</a> to verify your numbers</li>
                            </ul>
                        </li>
                        <li><strong>Status shows "Error":</strong> Check that TwiML App SID is correctly configured</li>
                        <li><strong>"Failed to initialize":</strong> Verify Twilio credentials are correct</li>
                        <li><strong>Browser blocks microphone:</strong> Allow microphone access when prompted</li>
                        <li><strong>Poor call quality:</strong> Check internet connection and try different browser</li>
                        <li><strong>"No audio" on calls:</strong> Check browser microphone permissions and refresh the page</li>
                    </ul>
                </div>
                
                <style>
                .setup-steps .step {
                    margin-bottom: 30px;
                    padding: 20px;
                    background: #f9f9f9;
                    border-left: 4px solid #0073aa;
                }
                .setup-steps h4 {
                    margin-top: 0;
                    color: #0073aa;
                }
                .setup-info {
                    background: #e7f5e7;
                    padding: 15px;
                    border-radius: 4px;
                    margin: 20px 0;
                }
                .troubleshooting {
                    background: #fff3cd;
                    padding: 15px;
                    border-radius: 4px;
                    margin: 20px 0;
                }
                </style>
            </div>
            
            <script>
            // Phone number management
            var statusCallbackUrl = '<?php echo home_url('/wp-json/twilio-webhook/v1/status'); ?>';
            
            function loadPhoneNumbers() {
                var listDiv = document.getElementById('phone-numbers-list');
                listDiv.innerHTML = '<p style="color: #666;">Loading phone numbers...</p>';
                
                var xhr = new XMLHttpRequest();
                xhr.open('POST', ajaxurl);
                xhr.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
                
                xhr.onload = function() {
                    try {
                        var response = JSON.parse(xhr.responseText);
                        console.log('Phone numbers response:', response);
                        
                        if (response.success && response.data) {
                            if (response.data.length === 0) {
                                listDiv.innerHTML = '<p style="color: #666;">No phone numbers found in your Twilio account. <a href="#" onclick="location.reload();">Refresh</a></p>';
                                return;
                            }
                            
                            var html = '<table style="width: 100%; border-collapse: collapse;">';
                            html += '<thead><tr>';
                            html += '<th style="text-align: left; padding: 10px; border-bottom: 2px solid #ddd;">Phone Number</th>';
                            html += '<th style="text-align: left; padding: 10px; border-bottom: 2px solid #ddd;">Name</th>';
                            html += '<th style="text-align: center; padding: 10px; border-bottom: 2px solid #ddd;">Status Callbacks</th>';
                            html += '<th style="text-align: center; padding: 10px; border-bottom: 2px solid #ddd;">Action</th>';
                            html += '</tr></thead><tbody>';
                            
                            response.data.forEach(function(number) {
                                var isEnabled = number.status_callback_url === statusCallbackUrl;
                                var statusColor = isEnabled ? '#28a745' : '#dc3545';
                                var statusText = isEnabled ? 'Enabled' : 'Disabled';
                                var buttonText = isEnabled ? 'Disable' : 'Enable';
                                var buttonClass = isEnabled ? 'button-secondary' : 'button-primary';
                                
                                html += '<tr>';
                                html += '<td style="padding: 10px; border-bottom: 1px solid #eee;">' + number.phone_number + '</td>';
                                html += '<td style="padding: 10px; border-bottom: 1px solid #eee;">' + (number.friendly_name || 'N/A') + '</td>';
                                html += '<td style="text-align: center; padding: 10px; border-bottom: 1px solid #eee;">';
                                html += '<span style="color: ' + statusColor + '; font-weight: bold;">' + statusText + '</span>';
                                if (isEnabled) {
                                    html += '<br><small style="color: #666;">Real-time cleanup active</small>';
                                }
                                html += '</td>';
                                html += '<td style="text-align: center; padding: 10px; border-bottom: 1px solid #eee;">';
                                html += '<button type="button" class="button ' + buttonClass + ' toggle-status-btn" ';
                                html += 'data-sid="' + number.sid + '" ';
                                html += 'data-number="' + number.phone_number + '" ';
                                html += 'data-enabled="' + isEnabled + '">';
                                html += buttonText + '</button>';
                                html += '</td>';
                                html += '</tr>';
                            });
                            
                            html += '</tbody></table>';
                            listDiv.innerHTML = html;
                            
                            // Show "Enable All" button if there are disabled numbers
                            var hasDisabled = response.data.some(function(n) {
                                return n.status_callback_url !== statusCallbackUrl;
                            });
                            document.getElementById('update-all-numbers-btn').style.display = hasDisabled ? 'inline-block' : 'none';
                            
                            // Attach event listeners to toggle buttons
                            document.querySelectorAll('.toggle-status-btn').forEach(function(btn) {
                                btn.addEventListener('click', toggleNumberStatus);
                            });
                        } else {
                            var errorMsg = response.error || 'Failed to load phone numbers';
                            listDiv.innerHTML = '<p style="color: #dc3545;">' + errorMsg + '</p>';
                            console.error('Failed to load phone numbers:', response);
                        }
                    } catch(e) {
                        listDiv.innerHTML = '<p style="color: #dc3545;">Error loading phone numbers: ' + e.message + '</p>';
                        console.error('Error parsing response:', e, xhr.responseText);
                    }
                };
                
                xhr.send('action=twp_get_phone_numbers&nonce=' + '<?php echo wp_create_nonce('twp_ajax_nonce'); ?>');
            }
            
            function toggleNumberStatus(e) {
                var button = e.target;
                var sid = button.dataset.sid;
                var number = button.dataset.number;
                var isEnabled = button.dataset.enabled === 'true';
                var resultDiv = document.getElementById('update-result');
                
                button.disabled = true;
                button.textContent = 'Updating...';
                
                var xhr = new XMLHttpRequest();
                xhr.open('POST', ajaxurl);
                xhr.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
                
                xhr.onload = function() {
                    button.disabled = false;
                    
                    try {
                        var response = JSON.parse(xhr.responseText);
                        
                        if (response.success) {
                            resultDiv.innerHTML = '<div style="background: #d4edda; border: 1px solid #c3e6cb; padding: 10px; border-radius: 4px; margin-top: 10px;">' +
                                '<strong style="color: #155724;">✅ Success!</strong> ' + number + ' has been updated.</div>';
                            
                            // Reload the list to show updated status
                            setTimeout(loadPhoneNumbers, 1000);
                        } else {
                            button.textContent = isEnabled ? 'Disable' : 'Enable';
                            resultDiv.innerHTML = '<div style="background: #f8d7da; border: 1px solid #f5c6cb; padding: 10px; border-radius: 4px; margin-top: 10px;">' +
                                '<strong style="color: #721c24;">❌ Error:</strong> ' + response.error + '</div>';
                        }
                    } catch(e) {
                        button.textContent = isEnabled ? 'Disable' : 'Enable';
                        resultDiv.innerHTML = '<div style="background: #f8d7da; border: 1px solid #f5c6cb; padding: 10px; border-radius: 4px; margin-top: 10px;">' +
                            '<strong style="color: #721c24;">❌ Error:</strong> Failed to update number</div>';
                    }
                };
                
                var params = 'action=twp_toggle_number_status_callback&nonce=' + '<?php echo wp_create_nonce('twp_nonce'); ?>' +
                    '&sid=' + encodeURIComponent(sid) +
                    '&enable=' + (!isEnabled);
                
                xhr.send(params);
            }
            
            // Refresh button
            document.getElementById('refresh-numbers-btn').addEventListener('click', loadPhoneNumbers);
            
            // Enable all button
            document.getElementById('update-all-numbers-btn').addEventListener('click', function() {
                var button = this;
                var resultDiv = document.getElementById('update-result');
                
                button.disabled = true;
                button.textContent = 'Updating All...';
                
                var xhr = new XMLHttpRequest();
                xhr.open('POST', ajaxurl);
                xhr.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
                
                xhr.onload = function() {
                    button.disabled = false;
                    button.textContent = 'Enable for All Numbers';
                    
                    try {
                        var response = JSON.parse(xhr.responseText);
                        
                        if (response.success) {
                            resultDiv.innerHTML = '<div style="background: #d4edda; border: 1px solid #c3e6cb; padding: 10px; border-radius: 4px; margin-top: 10px;">' +
                                '<strong style="color: #155724;">✅ Success!</strong> Updated ' + response.data.updated_count + ' numbers.</div>';
                            
                            setTimeout(loadPhoneNumbers, 1000);
                        } else {
                            resultDiv.innerHTML = '<div style="background: #f8d7da; border: 1px solid #f5c6cb; padding: 10px; border-radius: 4px; margin-top: 10px;">' +
                                '<strong style="color: #721c24;">❌ Error:</strong> ' + response.error + '</div>';
                        }
                    } catch(e) {
                        resultDiv.innerHTML = '<div style="background: #f8d7da; border: 1px solid #f5c6cb; padding: 10px; border-radius: 4px; margin-top: 10px;">' +
                            '<strong style="color: #721c24;">❌ Error:</strong> Failed to process response</div>';
                    }
                };
                
                xhr.send('action=twp_update_phone_status_callbacks&nonce=' + '<?php echo wp_create_nonce('twp_nonce'); ?>');
            });
            
            // Load numbers on page load
            loadPhoneNumbers();
            
            function copyToClipboard(text) {
                navigator.clipboard.writeText(text).then(function() {
                    alert('Copied to clipboard!');
                });
            }
            
            function loadElevenLabsModels() {
                var select = document.getElementById('elevenlabs-model-select');
                var button = select.nextElementSibling;
                var currentValue = select.value;
                
                button.textContent = 'Loading...';
                button.disabled = true;
                
                var xhr = new XMLHttpRequest();
                xhr.open('POST', ajaxurl);
                xhr.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
                
                xhr.onload = function() {
                    button.textContent = 'Load Available Models';
                    button.disabled = false;
                    
                    try {
                        var response = JSON.parse(xhr.responseText);
                        
                        if (response.success) {
                            var options = '<option value="">Select a model...</option>';
                            
                            response.data.forEach(function(model) {
                                var selected = model.model_id === currentValue ? ' selected' : '';
                                var displayName = model.name || model.model_id;
                                if (model.description) {
                                    displayName += ' - ' + model.description;
                                }
                                options += '<option value="' + model.model_id + '"' + selected + '>' + displayName + '</option>';
                            });
                            
                            select.innerHTML = options;
                        } else {
                            var errorMessage = 'Error loading models: ';
                            if (typeof response.data === 'string') {
                                errorMessage += response.data;
                            } else if (response.data && response.data.detail) {
                                errorMessage += response.data.detail;
                            } else if (response.data && response.data.error) {
                                errorMessage += response.data.error;
                            } else {
                                errorMessage += 'Unknown error occurred';
                            }
                            alert(errorMessage);
                        }
                    } catch (e) {
                        alert('Failed to load models. Please check your API key.');
                    }
                };
                
                xhr.send('action=twp_get_elevenlabs_models&nonce=' + '<?php echo wp_create_nonce('twp_ajax_nonce'); ?>');
            }
            
            function loadElevenLabsVoices() {
                var select = document.getElementById('elevenlabs-voice-select');
                var button = select.nextElementSibling;
                var currentValue = select.getAttribute('data-current') || select.value;
                
                console.log('Loading voices, current value:', currentValue);
                
                button.textContent = 'Loading...';
                button.disabled = true;
                
                var xhr = new XMLHttpRequest();
                xhr.open('POST', ajaxurl);
                xhr.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
                
                xhr.onload = function() {
                    button.textContent = 'Load Voices';
                    button.disabled = false;
                    
                    try {
                        var response = JSON.parse(xhr.responseText);
                        
                        if (response.success) {
                            var options = '<option value="">Select a voice...</option>';
                            
                            response.data.forEach(function(voice) {
                                var selected = voice.voice_id === currentValue ? ' selected' : '';
                                if (selected) {
                                    console.log('Found matching voice:', voice.name, 'ID:', voice.voice_id);
                                }
                                var description = voice.labels ? Object.values(voice.labels).join(', ') : '';
                                var optionText = voice.name + (description ? ' (' + description + ')' : '');
                                options += '<option value="' + voice.voice_id + '"' + selected + '>' + optionText + '</option>';
                            });
                            
                            select.innerHTML = options;
                            
                            // Update the data-current attribute with the selected value
                            if (currentValue) {
                                select.setAttribute('data-current', currentValue);
                            }
                            
                            // Add preview buttons
                            addVoicePreviewButtons(select, response.data);
                        } else {
                            var errorMessage = 'Error loading voices: ';
                            if (typeof response.data === 'string') {
                                errorMessage += response.data;
                            } else if (response.data && response.data.detail) {
                                errorMessage += response.data.detail;
                            } else if (response.data && response.data.error) {
                                errorMessage += response.data.error;
                            } else {
                                errorMessage += 'Unknown error occurred';
                            }
                            alert(errorMessage);
                        }
                    } catch (e) {
                        alert('Failed to load voices. Please check your API key.');
                    }
                };
                
                xhr.send('action=twp_get_elevenlabs_voices&nonce=' + '<?php echo wp_create_nonce('twp_ajax_nonce'); ?>');
            }
            
            function addVoicePreviewButtons(select, voices) {
                // Remove existing preview container
                var existingPreview = document.getElementById('voice-preview-container');
                if (existingPreview) {
                    existingPreview.remove();
                }
                
                // Create preview container
                var previewContainer = document.createElement('div');
                previewContainer.id = 'voice-preview-container';
                previewContainer.style.marginTop = '10px';
                previewContainer.innerHTML = '<button type="button" class="button" onclick="previewSelectedVoice()">Preview Voice</button> <span id="preview-status"></span>';
                
                select.parentNode.appendChild(previewContainer);
            }
            
            function previewSelectedVoice() {
                var select = document.getElementById('elevenlabs-voice-select');
                var voiceId = select.value;
                var statusSpan = document.getElementById('preview-status');
                
                if (!voiceId) {
                    alert('Please select a voice first.');
                    return;
                }
                
                statusSpan.textContent = 'Generating preview...';
                
                var xhr = new XMLHttpRequest();
                xhr.open('POST', ajaxurl);
                xhr.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
                
                xhr.onload = function() {
                    try {
                        var response = JSON.parse(xhr.responseText);
                        
                        if (response.success) {
                            statusSpan.innerHTML = '<audio controls><source src="' + response.data.audio_url + '" type="audio/mpeg">Your browser does not support the audio element.</audio>';
                        } else {
                            statusSpan.textContent = 'Error: ' + response.data;
                        }
                    } catch (e) {
                        statusSpan.textContent = 'Failed to generate preview.';
                    }
                };
                
                xhr.send('action=twp_preview_voice&voice_id=' + voiceId + '&nonce=' + '<?php echo wp_create_nonce('twp_ajax_nonce'); ?>');
            }
            
            function loadTwilioNumbers(selectId) {
                var select = document.getElementById(selectId);
                var button = event.target;
                var currentValue = select.value;
                
                button.textContent = 'Loading...';
                button.disabled = true;
                
                var xhr = new XMLHttpRequest();
                xhr.open('POST', ajaxurl);
                xhr.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
                
                xhr.onload = function() {
                    button.textContent = 'Refresh Numbers';
                    button.disabled = false;
                    
                    try {
                        var response = JSON.parse(xhr.responseText);
                        
                        if (response.success) {
                            var options = '<option value="">Select a Twilio number...</option>';
                            
                            if (Array.isArray(response.data)) {
                                response.data.forEach(function(number) {
                                    var phone = number.phone_number || '';
                                    var friendlyName = number.friendly_name || phone;
                                    if (phone) {
                                        var selected = phone === currentValue ? ' selected' : '';
                                        options += '<option value="' + phone + '"' + selected + '>' + friendlyName + ' (' + phone + ')' + '</option>';
                                    }
                                });
                            }
                            
                            select.innerHTML = options;
                        } else {
                            alert('Error loading Twilio numbers: ' + (response.data || 'Unknown error'));
                        }
                    } catch (e) {
                        alert('Failed to load Twilio numbers. Please check your Twilio credentials.');
                    }
                };
                
                xhr.send('action=twp_get_phone_numbers&nonce=' + '<?php echo wp_create_nonce('twp_ajax_nonce'); ?>');
            }
            
            // Auto-load voices if API key exists
            document.addEventListener('DOMContentLoaded', function() {
                var apiKeyField = document.querySelector('[name="twp_elevenlabs_api_key"]');
                var voiceSelect = document.getElementById('elevenlabs-voice-select');
                
                // Add change listener to maintain selection
                if (voiceSelect) {
                    voiceSelect.addEventListener('change', function() {
                        this.setAttribute('data-current', this.value);
                        console.log('Voice selection changed to:', this.value);
                    });
                }
                
                if (apiKeyField && apiKeyField.value && voiceSelect) {
                    loadElevenLabsVoices();
                }
            });
            
            // Auto-configure TwiML App functionality
            document.addEventListener('DOMContentLoaded', function() {
                var autoConfigBtn = document.getElementById('auto-configure-btn');
                var configureNumbersBtn = document.getElementById('configure-numbers-btn');
                var resultDiv = document.getElementById('auto-configure-result');
                var smartRoutingCheckbox = document.getElementById('enable-smart-routing');
                var phoneNumbersDiv = document.getElementById('phone-numbers-selection');
                
                // Load phone numbers for selection
                function loadPhoneNumbersForSelection() {
                    var xhr = new XMLHttpRequest();
                    xhr.open('POST', ajaxurl);
                    xhr.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
                    
                    xhr.onload = function() {
                        try {
                            var response = JSON.parse(xhr.responseText);
                            console.log('Phone numbers response:', response);
                            if (response.success && response.data) {
                                var numbers = response.data; // The data is the array directly
                                if (numbers.length === 0) {
                                    phoneNumbersDiv.innerHTML = '<p style="color: #666;">No phone numbers found in your Twilio account.</p>';
                                    return;
                                }
                                
                                var html = '<div style="max-height: 200px; overflow-y: auto; border: 1px solid #ddd; padding: 10px; border-radius: 4px;">';
                                numbers.forEach(function(number) {
                                    html += '<label style="display: block; padding: 5px 0;">';
                                    html += '<input type="checkbox" class="phone-number-checkbox" value="' + number.sid + '" data-number="' + number.phone_number + '" checked> ';
                                    html += '<strong>' + number.phone_number + '</strong>';
                                    if (number.friendly_name && number.friendly_name !== number.phone_number) {
                                        html += ' - ' + number.friendly_name;
                                    }
                                    if (number.voice_url) {
                                        html += '<br><small style="margin-left: 25px; color: #666;">Current: ' + number.voice_url.replace(/^https?:\/\/[^\/]+/, '') + '</small>';
                                    }
                                    html += '</label>';
                                });
                                html += '</div>';
                                phoneNumbersDiv.innerHTML = html;
                            } else {
                                phoneNumbersDiv.innerHTML = '<p style="color: #dc3545;">Failed to load phone numbers</p>';
                            }
                        } catch(e) {
                            console.error('Error parsing phone numbers response:', e, xhr.responseText);
                            phoneNumbersDiv.innerHTML = '<p style="color: #dc3545;">Error loading phone numbers: ' + e.message + '</p>';
                        }
                    };
                    
                    xhr.onerror = function() {
                        phoneNumbersDiv.innerHTML = '<p style="color: #dc3545;">Network error loading phone numbers</p>';
                    };
                    
                    xhr.send('action=twp_get_phone_numbers&nonce=' + '<?php echo wp_create_nonce('twp_ajax_nonce'); ?>');
                }
                
                // Load phone numbers on page load
                loadPhoneNumbersForSelection();
                
                // Select/Deselect all buttons
                var selectAllBtn = document.getElementById('select-all-numbers');
                var deselectAllBtn = document.getElementById('deselect-all-numbers');
                
                if (selectAllBtn) {
                    selectAllBtn.addEventListener('click', function() {
                        document.querySelectorAll('.phone-number-checkbox').forEach(function(cb) {
                            cb.checked = true;
                        });
                    });
                }
                
                if (deselectAllBtn) {
                    deselectAllBtn.addEventListener('click', function() {
                        document.querySelectorAll('.phone-number-checkbox').forEach(function(cb) {
                            cb.checked = false;
                        });
                    });
                }
                
                function performConfiguration(action, buttonText, loadingText) {
                    return function() {
                        var button = this;
                        var originalText = button.textContent;
                        
                        // Get selected phone numbers
                        var selectedNumbers = [];
                        document.querySelectorAll('.phone-number-checkbox:checked').forEach(function(cb) {
                            selectedNumbers.push({
                                sid: cb.value,
                                number: cb.dataset.number
                            });
                        });
                        
                        if (selectedNumbers.length === 0) {
                            alert('Please select at least one phone number to configure.');
                            return;
                        }
                        
                        button.disabled = true;
                        button.textContent = loadingText;
                        
                        var actionType = action === 'twp_auto_configure_twiml_app' ? 'full' : 'numbers only';
                        resultDiv.innerHTML = '<div style="background: #fff3cd; border: 1px solid #ffeaa7; padding: 10px; border-radius: 4px;">Setting up ' + actionType + ' configuration for ' + selectedNumbers.length + ' number(s)...</div>';
                        
                        var xhr = new XMLHttpRequest();
                        xhr.open('POST', ajaxurl);
                        xhr.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
                        
                        xhr.onload = function() {
                            button.disabled = false;
                            button.textContent = originalText;
                            
                            try {
                                var response = JSON.parse(xhr.responseText);
                                var html;
                                
                                if (response.success) {
                                    var data = response.data;
                                    html = '<div style="background: #d4edda; border: 1px solid #c3e6cb; padding: 15px; border-radius: 4px;">';
                                    html += '<h4 style="color: #155724; margin-top: 0;">✅ Configuration Successful!</h4>';
                                    
                                    if (data.steps_completed && data.steps_completed.length > 0) {
                                        html += '<h5>Steps Completed:</h5><ul>';
                                        data.steps_completed.forEach(function(step) {
                                            html += '<li style="color: #155724;">' + step + '</li>';
                                        });
                                        html += '</ul>';
                                    }
                                    
                                    if (data.warnings && data.warnings.length > 0) {
                                        html += '<h5>Warnings:</h5><ul>';
                                        data.warnings.forEach(function(warning) {
                                            html += '<li style="color: #856404;">' + warning + '</li>';
                                        });
                                        html += '</ul>';
                                    }
                                    
                                    if (data.app_sid) {
                                        html += '<p><strong>TwiML App SID:</strong> <code>' + data.app_sid + '</code></p>';
                                    }
                                    if (data.voice_url) {
                                        html += '<p><strong>Voice URL:</strong> <code>' + data.voice_url + '</code></p>';
                                    }
                                    if (data.webhook_url) {
                                        html += '<p><strong>Webhook URL:</strong> <code>' + data.webhook_url + '</code></p>';
                                    }
                                    if (data.routing_type) {
                                        html += '<p><strong>Routing Type:</strong> ' + data.routing_type + '</p>';
                                    }
                                    
                                    var successMessage = action === 'twp_auto_configure_twiml_app' ? 
                                        '🎉 Your browser phone is now ready! Go to <strong>Twilio WP Plugin → Browser Phone</strong> to start making calls.' :
                                        '📞 Phone numbers configured successfully!';
                                    html += '<p style="margin-bottom: 0;">' + successMessage + '</p>';
                                    html += '</div>';
                                    
                                    // Update the TwiML App SID field if it exists
                                    if (data.app_sid) {
                                        var appSidField = document.querySelector('input[name="twp_twiml_app_sid"]');
                                        if (appSidField) {
                                            appSidField.value = data.app_sid;
                                        }
                                    }
                                    
                                } else {
                                    html = '<div style="background: #f8d7da; border: 1px solid #f5c6cb; padding: 15px; border-radius: 4px;">';
                                    html += '<h4 style="color: #721c24; margin-top: 0;">❌ Configuration Failed</h4>';
                                    html += '<p style="color: #721c24; margin-bottom: 0;">' + response.data + '</p>';
                                    html += '</div>';
                                }
                                
                                resultDiv.innerHTML = html;
                                
                            } catch(e) {
                                resultDiv.innerHTML = '<div style="background: #f8d7da; border: 1px solid #f5c6cb; padding: 15px; border-radius: 4px;">' +
                                    '<h4 style="color: #721c24; margin-top: 0;">❌ Error</h4>' +
                                    '<p style="color: #721c24; margin-bottom: 0;">Failed to parse response: ' + e.message + '</p></div>';
                            }
                        };
                        
                        xhr.onerror = function() {
                            button.disabled = false;
                            button.textContent = originalText;
                            resultDiv.innerHTML = '<div style="background: #f8d7da; border: 1px solid #f5c6cb; padding: 15px; border-radius: 4px;">' +
                                '<h4 style="color: #721c24; margin-top: 0;">❌ Network Error</h4>' +
                                '<p style="color: #721c24; margin-bottom: 0;">Failed to connect to server. Please try again.</p></div>';
                        };
                        
                        var enableSmartRouting = smartRoutingCheckbox ? smartRoutingCheckbox.checked : true;
                        var params = 'action=' + action + '&nonce=' + '<?php echo wp_create_nonce('twp_ajax_nonce'); ?>' + 
                            '&enable_smart_routing=' + enableSmartRouting +
                            '&selected_numbers=' + encodeURIComponent(JSON.stringify(selectedNumbers));
                        xhr.send(params);
                    };
                }
                
                if (autoConfigBtn) {
                    autoConfigBtn.addEventListener('click', performConfiguration(
                        'twp_auto_configure_twiml_app', 
                        '🔧 Auto-Configure Browser Phone',
                        '⏳ Configuring...'
                    ));
                }
                
                if (configureNumbersBtn) {
                    configureNumbersBtn.addEventListener('click', performConfiguration(
                        'twp_configure_phone_numbers_only',
                        '📞 Configure Phone Numbers Only',
                        '⏳ Configuring Numbers...'
                    ));
                }
            });
            </script>
        </div>
        <?php
    }
    
    /**
     * Display schedules page
     */
    public function display_schedules_page() {
        // Ensure database tables exist
        TWP_Activator::ensure_tables_exist();
        ?>
        <div class="wrap">
            <h1>Business Hours Schedules</h1>
            <p>Define business hours that determine when different workflows are active. Schedules automatically switch between workflows based on time and day.</p>
            <button class="button button-primary" onclick="openScheduleModal()">Add New Schedule</button>
            
            <table class="wp-list-table widefat fixed striped" style="margin-top: 20px;">
                <thead>
                    <tr>
                        <th>Schedule Name</th>
                        <th>Days</th>
                        <th>Business Hours</th>
                        <th>Holidays</th>
                        <th>Workflow</th>
                        <th>Status</th>
                        <th>Actions</th>
                    </tr>
                </thead>
                <tbody>
                    <?php
                    $schedules = TWP_Scheduler::get_schedules();
                    foreach ($schedules as $schedule) {
                        ?>
                        <tr>
                            <td><?php echo esc_html($schedule->schedule_name); ?></td>
                            <td><?php echo esc_html(ucwords(str_replace(',', ', ', $schedule->days_of_week))); ?></td>
                            <td><?php echo esc_html($schedule->start_time . ' - ' . $schedule->end_time); ?></td>
                            <td>
                                <?php
                                if (!empty($schedule->holiday_dates)) {
                                    $holidays = array_map('trim', explode(',', $schedule->holiday_dates));
                                    echo esc_html(count($holidays) . ' date' . (count($holidays) > 1 ? 's' : '') . ' set');
                                } else {
                                    echo '<em>None</em>';
                                }
                                ?>
                            </td>
                            <td>
                                <?php
                                if ($schedule->workflow_id) {
                                    $workflow = TWP_Workflow::get_workflow($schedule->workflow_id);
                                    echo $workflow ? esc_html($workflow->workflow_name) : 'Workflow #' . $schedule->workflow_id;
                                } else {
                                    echo '<em>No specific workflow</em>';
                                }
                                ?>
                            </td>
                            <td>
                                <span class="twp-status <?php echo $schedule->is_active ? 'active' : 'inactive'; ?>">
                                    <?php echo $schedule->is_active ? 'Active' : 'Inactive'; ?>
                                </span>
                            </td>
                            <td>
                                <button class="button" onclick="editSchedule(<?php echo $schedule->id; ?>)">Edit</button>
                                <button class="button" onclick="deleteSchedule(<?php echo $schedule->id; ?>)">Delete</button>
                            </td>
                        </tr>
                        <?php
                    }
                    if (empty($schedules)) {
                        echo '<tr><td colspan="7">No schedules found. <a href="#" onclick="openScheduleModal()">Create your first schedule</a>.</td></tr>';
                    }
                    ?>
                </tbody>
            </table>
        </div>
        
        <!-- Schedule Modal -->
        <div id="schedule-modal" class="twp-modal" style="display: none;">
            <div class="twp-modal-content">
                <h2 id="schedule-modal-title">Add New Schedule</h2>
                <form id="schedule-form">
                    <input type="hidden" id="schedule-id" name="schedule_id" value="">
                    
                    <div class="form-field">
                        <label for="schedule-name">Schedule Name:</label>
                        <input type="text" id="schedule-name" name="schedule_name" required placeholder="e.g., Business Hours, Weekend Schedule">
                        <p class="description">Give this schedule a descriptive name</p>
                    </div>
                    
                    <div class="form-field">
                        <label for="days-of-week">Days of Week:</label>
                        <div class="days-checkboxes">
                            <label><input type="checkbox" name="days_of_week[]" value="monday"> Monday</label>
                            <label><input type="checkbox" name="days_of_week[]" value="tuesday"> Tuesday</label>
                            <label><input type="checkbox" name="days_of_week[]" value="wednesday"> Wednesday</label>
                            <label><input type="checkbox" name="days_of_week[]" value="thursday"> Thursday</label>
                            <label><input type="checkbox" name="days_of_week[]" value="friday"> Friday</label>
                            <label><input type="checkbox" name="days_of_week[]" value="saturday"> Saturday</label>
                            <label><input type="checkbox" name="days_of_week[]" value="sunday"> Sunday</label>
                        </div>
                        <p class="description">Select the days when this schedule should be active</p>
                    </div>
                    
                    <div class="form-field">
                        <label for="start-time">Business Hours Start:</label>
                        <input type="time" id="start-time" name="start_time" required>
                    </div>
                    
                    <div class="form-field">
                        <label for="end-time">Business Hours End:</label>
                        <input type="time" id="end-time" name="end_time" required>
                    </div>
                    
                    <div class="form-field">
                        <label for="business-hours-workflow">Business Hours Workflow (Optional):</label>
                        <select id="business-hours-workflow" name="workflow_id">
                            <option value="">No specific workflow</option>
                            <?php
                            $workflows = TWP_Workflow::get_workflows();
                            if ($workflows && is_array($workflows)) {
                                foreach ($workflows as $workflow) {
                                    echo '<option value="' . $workflow->id . '">' . esc_html($workflow->workflow_name) . '</option>';
                                }
                            } else {
                                echo '<option value="" disabled>No workflows found - create a workflow first</option>';
                            }
                            ?>
                        </select>
                        <p class="description">This workflow will handle calls during business hours</p>
                    </div>
                    
                    <div class="form-field">
                        <label for="after-hours-action">After Hours Action:</label>
                        <select id="after-hours-action" name="after_hours_action" onchange="toggleAfterHoursFields(this)">
                            <option value="default">Use Default Workflow</option>
                            <option value="forward">Forward to Number</option>
                            <option value="workflow">Use Different Workflow</option>
                        </select>
                    </div>
                    
                    <div id="after-hours-forward" class="form-field" style="display: none;">
                        <label for="forward-number">Forward Number:</label>
                        <input type="text" id="forward-number" name="forward_number" placeholder="+1234567890">
                        <p class="description">Calls will be forwarded to this number after hours</p>
                    </div>
                    
                    <div id="after-hours-workflow" class="form-field" style="display: none;">
                        <label for="after-hours-workflow-select">After Hours Workflow:</label>
                        <select id="after-hours-workflow-select" name="after_hours_workflow_id">
                            <option value="">Select a workflow...</option>
                            <?php
                            if ($workflows && is_array($workflows)) {
                                foreach ($workflows as $workflow) {
                                    echo '<option value="' . $workflow->id . '">' . esc_html($workflow->workflow_name) . '</option>';
                                }
                            }
                            ?>
                        </select>
                        <p class="description">This workflow will handle calls outside business hours</p>
                    </div>
                    
                    <div class="form-field">
                        <label for="holiday-dates">Holiday Dates (Optional):</label>
                        <textarea id="holiday-dates" name="holiday_dates" rows="3" placeholder="2025-12-25, 2025-01-01, 2025-07-04"></textarea>
                        <p class="description">Enter dates (YYYY-MM-DD format) when this schedule should be inactive, separated by commas. These days will be treated as "after hours" regardless of time.</p>
                    </div>
                    
                    <div class="form-field">
                        <label>
                            <input type="checkbox" name="is_active" checked> Active
                        </label>
                        <p class="description">Uncheck to temporarily disable this schedule</p>
                    </div>
                    
                    <div class="modal-buttons">
                        <button type="submit" class="button button-primary">Save Schedule</button>
                        <button type="button" class="button" onclick="closeScheduleModal()">Cancel</button>
                    </div>
                </form>
            </div>
        </div>
        <?php
    }
    
    /**
     * Display workflows page
     */
    public function display_workflows_page() {
        ?>
        <div class="wrap">
            <h1>Call Workflows</h1>
            <button class="button button-primary" onclick="openWorkflowBuilder()">Create New Workflow</button>
            
            <table class="wp-list-table widefat fixed striped" style="margin-top: 20px;">
                <thead>
                    <tr>
                        <th>Workflow Name</th>
                        <th>Phone Number</th>
                        <th>Steps</th>
                        <th>Status</th>
                        <th>Actions</th>
                    </tr>
                </thead>
                <tbody>
                    <?php
                    $workflows = TWP_Workflow::get_workflows();
                    foreach ($workflows as $workflow) {
                        $workflow_data = json_decode($workflow->workflow_data, true);
                        $step_count = isset($workflow_data['steps']) ? count($workflow_data['steps']) : 0;
                        ?>
                        <tr>
                            <td><?php echo esc_html($workflow->workflow_name); ?></td>
                            <td><?php echo esc_html($workflow->phone_number); ?></td>
                            <td><?php echo $step_count; ?> steps</td>
                            <td>
                                <span class="twp-status <?php echo $workflow->is_active ? 'active' : 'inactive'; ?>">
                                    <?php echo $workflow->is_active ? 'Active' : 'Inactive'; ?>
                                </span>
                            </td>
                            <td>
                                <button class="button" onclick="editWorkflow(<?php echo $workflow->id; ?>)">Edit</button>
                                <button class="button" onclick="deleteWorkflow(<?php echo $workflow->id; ?>)">Delete</button>
                            </td>
                        </tr>
                        <?php
                    }
                    ?>
                </tbody>
            </table>
        </div>
        
        <!-- Workflow Builder Modal -->
        <div id="workflow-builder" class="twp-modal" style="display: none;">
            <div class="twp-modal-content large">
                <h2 id="workflow-modal-title">Create New Workflow</h2>
                
                <form id="workflow-basic-info">
                    <div class="workflow-info-grid">
                        <div>
                            <label>Workflow Name:</label>
                            <input type="text" id="workflow-name" name="workflow_name" required>
                        </div>
                        <div>
                            <label>Phone Number:</label>
                            <select id="workflow-phone" name="phone_number" required>
                                <option value="">Select a phone number...</option>
                                <!-- Will be populated via AJAX -->
                            </select>
                        </div>
                        <div>
                            <label>
                                <input type="checkbox" id="workflow-active" name="is_active" checked> Active
                            </label>
                        </div>
                    </div>
                </form>
                
                <div class="workflow-builder-container">
                    <div class="workflow-steps">
                        <h3>Workflow Steps</h3>
                        <div class="step-types-toolbar">
                            <button type="button" class="button step-btn" data-step-type="greeting">
                                <span class="dashicons dashicons-megaphone"></span> Greeting
                            </button>
                            <button type="button" class="button step-btn" data-step-type="ivr_menu">
                                <span class="dashicons dashicons-menu"></span> IVR Menu
                            </button>
                            <button type="button" class="button step-btn" data-step-type="forward">
                                <span class="dashicons dashicons-phone"></span> Forward
                            </button>
                            <button type="button" class="button step-btn" data-step-type="queue">
                                <span class="dashicons dashicons-groups"></span> Queue
                            </button>
                            <button type="button" class="button step-btn" data-step-type="voicemail">
                                <span class="dashicons dashicons-microphone"></span> Voicemail
                            </button>
                            <button type="button" class="button step-btn" data-step-type="schedule_check">
                                <span class="dashicons dashicons-clock"></span> Schedule
                            </button>
                            <button type="button" class="button step-btn" data-step-type="sms">
                                <span class="dashicons dashicons-email-alt"></span> SMS
                            </button>
                        </div>
                        
                        <div id="workflow-steps-list" class="workflow-steps-container">
                            <!-- Steps will be added here -->
                        </div>
                    </div>
                    
                    <div class="workflow-preview">
                        <h3>Call Flow Preview</h3>
                        <div id="workflow-preview-content" class="workflow-flow-chart">
                            <div class="flow-start">📞 Incoming Call</div>
                            <div id="flow-steps"></div>
                        </div>
                    </div>
                </div>
                
                <div class="modal-buttons">
                    <button type="button" class="button button-primary" id="save-workflow-btn">Save Workflow</button>
                    <button type="button" class="button" onclick="closeWorkflowBuilder()">Cancel</button>
                </div>
            </div>
        </div>
        
        <!-- Step Configuration Modal -->
        <div id="step-config-modal" class="twp-modal" style="display: none;">
            <div class="twp-modal-content">
                <h2 id="step-config-title">Configure Step</h2>
                <form id="step-config-form">
                    <input type="hidden" id="step-id" name="step_id">
                    <input type="hidden" id="step-type" name="step_type">
                    
                    <div id="step-config-content">
                        <!-- Dynamic content based on step type -->
                    </div>
                    
                    <div class="modal-buttons">
                        <button type="button" class="button button-primary" id="save-step-btn">Save Step</button>
                        <button type="button" class="button" onclick="closeStepConfigModal()">Cancel</button>
                    </div>
                </form>
            </div>
        </div>
        <?php
    }
    
    /**
     * Display queues page
     */
    public function display_queues_page() {
        ?>
        <div class="wrap">
            <h1>Call Queues</h1>
            <button class="button button-primary" onclick="openQueueModal()">Create New Queue</button>
            
            <div class="twp-queue-grid" style="margin-top: 20px;">
                <?php
                global $wpdb;
                $queue_table = $wpdb->prefix . 'twp_call_queues';
                $queues = $wpdb->get_results("SELECT * FROM $queue_table");
                
                foreach ($queues as $queue) {
                    $queue_status = TWP_Call_Queue::get_queue_status();
                    $waiting_calls = 0;
                    
                    foreach ($queue_status as $status) {
                        if ($status['queue_id'] == $queue->id) {
                            $waiting_calls = $status['waiting_calls'];
                            break;
                        }
                    }
                    ?>
                    <div class="twp-queue-card">
                        <h3><?php echo esc_html($queue->queue_name); ?></h3>
                        <div class="queue-stats">
                            <div class="stat">
                                <span class="label">Notification Number:</span>
                                <span class="value"><?php echo esc_html($queue->notification_number ?: 'Not set'); ?></span>
                            </div>
                            <?php 
                            // Get agent group name
                            $group_name = 'None';
                            if (!empty($queue->agent_group_id)) {
                                $groups_table = $wpdb->prefix . 'twp_agent_groups';
                                $group = $wpdb->get_row($wpdb->prepare("SELECT group_name FROM $groups_table WHERE id = %d", $queue->agent_group_id));
                                if ($group) {
                                    $group_name = $group->group_name;
                                }
                            }
                            ?>
                            <div class="stat">
                                <span class="label">Agent Group:</span>
                                <span class="value"><?php echo esc_html($group_name); ?></span>
                            </div>
                            <div class="stat">
                                <span class="label">Waiting:</span>
                                <span class="value"><?php echo $waiting_calls; ?></span>
                            </div>
                            <div class="stat">
                                <span class="label">Max Size:</span>
                                <span class="value"><?php echo $queue->max_size; ?></span>
                            </div>
                            <div class="stat">
                                <span class="label">Timeout:</span>
                                <span class="value"><?php echo $queue->timeout_seconds; ?>s</span>
                            </div>
                        </div>
                        <div class="queue-actions">
                            <button class="button" onclick="viewQueueDetails(<?php echo $queue->id; ?>)">View Details</button>
                            <button class="button" onclick="editQueue(<?php echo $queue->id; ?>)">Edit</button>
                            <button class="button button-link-delete" onclick="deleteQueue(<?php echo $queue->id; ?>)" style="color: #dc3232;">Delete</button>
                        </div>
                    </div>
                    <?php
                }
                ?>
            </div>
        </div>
        
        <!-- Queue Modal -->
        <div id="queue-modal" class="twp-modal" style="display: none;">
            <div class="twp-modal-content">
                <h2>Create/Edit Queue</h2>
                <form id="queue-form">
                    <input type="hidden" id="queue-id" name="queue_id" value="">
                    
                    <label>Queue Name:</label>
                    <input type="text" name="queue_name" required>
                    
                    <label>SMS Notification Number:</label>
                    <select name="notification_number" id="queue-notification-number" class="regular-text">
                        <option value="">Select a Twilio number...</option>
                        <?php
                        try {
                            // Get Twilio phone numbers
                            $twilio = new TWP_Twilio_API();
                            $numbers_result = $twilio->get_phone_numbers();
                            
                            if ($numbers_result['success'] && isset($numbers_result['data']['incoming_phone_numbers'])) {
                                $numbers = $numbers_result['data']['incoming_phone_numbers'];
                                if (is_array($numbers) && !empty($numbers)) {
                                    foreach ($numbers as $number) {
                                        $phone = isset($number['phone_number']) ? $number['phone_number'] : '';
                                        $friendly_name = isset($number['friendly_name']) ? $number['friendly_name'] : $phone;
                                        if (!empty($phone)) {
                                            echo '<option value="' . esc_attr($phone) . '">' . esc_html($friendly_name . ' (' . $phone . ')') . '</option>';
                                        }
                                    }
                                }
                            }
                        } catch (Exception $e) {
                            echo '<option value="">Error loading numbers</option>';
                        }
                        ?>
                    </select>
                    <button type="button" onclick="loadTwilioNumbers('queue-phone-number')" class="button" style="margin-left: 10px;">Refresh Numbers</button>
                    <p class="description">Phone number that this queue is associated with (used for agent caller ID)</p>
                    
                    <label>Agent Group:</label>
                    <select name="agent_group_id" id="queue-agent-group" class="regular-text">
                        <option value="">Select an agent group...</option>
                        <?php
                        // Get agent groups
                        global $wpdb;
                        $groups_table = $wpdb->prefix . 'twp_agent_groups';
                        $groups = $wpdb->get_results("SELECT * FROM $groups_table ORDER BY group_name");
                        
                        foreach ($groups as $group) {
                            echo '<option value="' . esc_attr($group->id) . '">' . esc_html($group->group_name) . '</option>';
                        }
                        ?>
                    </select>
                    <p class="description">Agent group that will handle calls from this queue</p>
                    
                    <label>Max Size:</label>
                    <input type="number" name="max_size" min="1" max="100" value="10">
                    
                    <label>Timeout (seconds):</label>
                    <input type="number" name="timeout_seconds" min="30" max="3600" value="300">
                    
                    <label>Wait Music URL:</label>
                    <input type="url" name="wait_music_url">
                    
                    <label>TTS Welcome Message:</label>
                    <textarea name="tts_message" rows="3"></textarea>
                    
                    <div class="modal-buttons">
                        <button type="submit" class="button button-primary">Save</button>
                        <button type="button" class="button" onclick="closeQueueModal()">Cancel</button>
                    </div>
                </form>
            </div>
        </div>
        <?php
    }
    
    /**
     * Display phone numbers page
     */
    public function display_numbers_page() {
        ?>
        <div class="wrap">
            <h1>Phone Numbers</h1>
            
            <div class="twp-numbers-actions">
                <button class="button button-primary" onclick="searchAvailableNumbers()">Buy New Number</button>
                <button class="button" onclick="refreshNumbers()">Refresh</button>
            </div>
            
            <h2>Your Twilio Phone Numbers</h2>
            <div id="twp-numbers-list">
                <div class="twp-spinner"></div>
                <p>Loading phone numbers...</p>
            </div>
            
            <h2>Available Numbers for Purchase</h2>
            <div id="twp-available-numbers" style="display: none;">
                <div class="twp-search-form">
                    <label>Country:</label>
                    <select id="country-code">
                        <option value="US">United States</option>
                        <option value="CA">Canada</option>
                        <option value="GB">United Kingdom</option>
                        <option value="AU">Australia</option>
                    </select>
                    
                    <label>Area Code:</label>
                    <input type="text" id="area-code" placeholder="Optional">
                    
                    <label>Contains:</label>
                    <input type="text" id="contains" placeholder="Optional">
                    
                    <button class="button" onclick="searchNumbers()">Search</button>
                </div>
                
                <div id="search-results"></div>
            </div>
        </div>
        
        <!-- Number Configuration Modal -->
        <div id="number-config-modal" class="twp-modal" style="display: none;">
            <div class="twp-modal-content">
                <h2>Configure Phone Number</h2>
                <form id="number-config-form">
                    <input type="hidden" id="number-sid" name="number_sid" value="">
                    
                    <label>Phone Number:</label>
                    <input type="text" id="phone-number" readonly>
                    
                    <label>Voice URL:</label>
                    <select name="voice_url">
                        <option value="">Select a workflow or schedule...</option>
                        <optgroup label="Workflows">
                            <?php
                            $workflows = TWP_Workflow::get_workflows();
                            foreach ($workflows as $workflow) {
                                $webhook_url = rest_url('twilio-webhook/v1/voice');
                                $webhook_url = add_query_arg('workflow_id', $workflow->id, $webhook_url);
                                echo '<option value="' . esc_url($webhook_url) . '">' . esc_html($workflow->workflow_name) . '</option>';
                            }
                            ?>
                        </optgroup>
                        <optgroup label="Schedules">
                            <?php
                            $schedules = TWP_Scheduler::get_schedules();
                            foreach ($schedules as $schedule) {
                                $webhook_url = rest_url('twilio-webhook/v1/voice');
                                $webhook_url = add_query_arg('schedule_id', $schedule->id, $webhook_url);
                                echo '<option value="' . esc_url($webhook_url) . '">' . esc_html($schedule->schedule_name) . '</option>';
                            }
                            ?>
                        </optgroup>
                    </select>
                    
                    <label>SMS URL:</label>
                    <input type="url" name="sms_url" value="<?php echo rest_url('twilio-webhook/v1/sms'); ?>">
                    
                    <div class="modal-buttons">
                        <button type="submit" class="button button-primary">Save</button>
                        <button type="button" class="button" onclick="closeNumberConfigModal()">Cancel</button>
                    </div>
                </form>
            </div>
        </div>
        <?php
    }
    
    /**
     * Display voicemails page
     */
    public function display_voicemails_page() {
        ?>
        <div class="wrap">
            <h1>Voicemails</h1>
            
            <div class="twp-voicemail-filters">
                <label>Filter by workflow:</label>
                <select id="voicemail-workflow-filter">
                    <option value="">All workflows</option>
                    <?php
                    $workflows = TWP_Workflow::get_workflows();
                    foreach ($workflows as $workflow) {
                        echo '<option value="' . $workflow->id . '">' . esc_html($workflow->workflow_name) . '</option>';
                    }
                    ?>
                </select>
                
                <label>Date range:</label>
                <input type="date" id="voicemail-date-from" />
                <input type="date" id="voicemail-date-to" />
                
                <button class="button" onclick="filterVoicemails()">Filter</button>
                <button class="button" onclick="exportVoicemails()">Export</button>
            </div>
            
            <div class="twp-voicemail-stats">
                <div class="stat-card">
                    <h3>Total Voicemails</h3>
                    <div class="stat-value" id="total-voicemails">
                        <?php
                        global $wpdb;
                        $table = $wpdb->prefix . 'twp_voicemails';
                        echo $wpdb->get_var("SELECT COUNT(*) FROM $table");
                        ?>
                    </div>
                </div>
                
                <div class="stat-card">
                    <h3>Today</h3>
                    <div class="stat-value" id="today-voicemails">
                        <?php
                        echo $wpdb->get_var("SELECT COUNT(*) FROM $table WHERE DATE(created_at) = CURDATE()");
                        ?>
                    </div>
                </div>
                
                <div class="stat-card">
                    <h3>This Week</h3>
                    <div class="stat-value" id="week-voicemails">
                        <?php
                        echo $wpdb->get_var("SELECT COUNT(*) FROM $table WHERE YEARWEEK(created_at) = YEARWEEK(NOW())");
                        ?>
                    </div>
                </div>
            </div>
            
            <table class="wp-list-table widefat fixed striped" id="voicemails-table">
                <thead>
                    <tr>
                        <th>Date/Time</th>
                        <th>From Number</th>
                        <th>Workflow</th>
                        <th>Duration</th>
                        <th>Transcription</th>
                        <th>Recording</th>
                        <th>Actions</th>
                    </tr>
                </thead>
                <tbody>
                    <?php $this->display_voicemails_table(); ?>
                </tbody>
            </table>
        </div>
        
        <!-- Voicemail Player Modal -->
        <div id="voicemail-player-modal" class="twp-modal" style="display: none;">
            <div class="twp-modal-content">
                <h2 id="voicemail-modal-title">Voicemail Player</h2>
                
                <div class="voicemail-details">
                    <div class="detail-row">
                        <span class="label">From:</span>
                        <span id="voicemail-from"></span>
                    </div>
                    <div class="detail-row">
                        <span class="label">Date:</span>
                        <span id="voicemail-date"></span>
                    </div>
                    <div class="detail-row">
                        <span class="label">Duration:</span>
                        <span id="voicemail-duration"></span>
                    </div>
                </div>
                
                <div class="voicemail-player">
                    <audio id="voicemail-audio" controls style="width: 100%; margin: 20px 0;">
                        Your browser does not support the audio element.
                    </audio>
                </div>
                
                <div class="voicemail-transcription">
                    <h4>Transcription:</h4>
                    <div id="voicemail-transcription-text">
                        <em>No transcription available</em>
                    </div>
                    <button class="button" onclick="transcribeVoicemail()" id="transcribe-btn">Generate Transcription</button>
                </div>
                
                <div class="voicemail-actions">
                    <button class="button" onclick="downloadVoicemail()">Download</button>
                    <button class="button button-danger" onclick="deleteVoicemail()">Delete</button>
                    <button class="button" onclick="closeVoicemailModal()">Close</button>
                </div>
            </div>
        </div>
        <?php
    }
    
    /**
     * Display call logs page
     */
    public function display_call_logs_page() {
        ?>
        <div class="wrap">
            <h1>Call Logs</h1>
            
            <div class="twp-call-log-filters">
                <label>Phone Number:</label>
                <select id="call-log-phone-filter">
                    <option value="">All numbers</option>
                    <?php
                    global $wpdb;
                    $table = $wpdb->prefix . 'twp_call_log';
                    $numbers = $wpdb->get_results("SELECT DISTINCT from_number FROM $table WHERE from_number != '' ORDER BY from_number");
                    foreach ($numbers as $number) {
                        echo '<option value="' . esc_attr($number->from_number) . '">' . esc_html($number->from_number) . '</option>';
                    }
                    ?>
                </select>
                
                <label>Status:</label>
                <select id="call-log-status-filter">
                    <option value="">All statuses</option>
                    <option value="initiated">Initiated</option>
                    <option value="ringing">Ringing</option>
                    <option value="answered">Answered</option>
                    <option value="completed">Completed</option>
                    <option value="busy">Busy</option>
                    <option value="failed">Failed</option>
                    <option value="no-answer">No Answer</option>
                </select>
                
                <label>Date range:</label>
                <input type="date" id="call-log-date-from" />
                <input type="date" id="call-log-date-to" />
                
                <button class="button" onclick="filterCallLogs()">Filter</button>
                <button class="button" onclick="exportCallLogs()">Export</button>
            </div>
            
            <div class="twp-call-log-stats">
                <div class="stat-card">
                    <h3>Total Calls</h3>
                    <div class="stat-value">
                        <?php
                        echo $wpdb->get_var("SELECT COUNT(*) FROM $table");
                        ?>
                    </div>
                </div>
                
                <div class="stat-card">
                    <h3>Today</h3>
                    <div class="stat-value">
                        <?php
                        echo $wpdb->get_var("SELECT COUNT(*) FROM $table WHERE DATE(created_at) = CURDATE()");
                        ?>
                    </div>
                </div>
                
                <div class="stat-card">
                    <h3>Answered</h3>
                    <div class="stat-value">
                        <?php
                        echo $wpdb->get_var("SELECT COUNT(*) FROM $table WHERE status = 'completed' AND duration > 0");
                        ?>
                    </div>
                </div>
                
                <div class="stat-card">
                    <h3>Avg Duration</h3>
                    <div class="stat-value">
                        <?php
                        $avg = $wpdb->get_var("SELECT AVG(duration) FROM $table WHERE duration > 0");
                        echo $avg ? round($avg) . 's' : '0s';
                        ?>
                    </div>
                </div>
            </div>
            
            <table class="wp-list-table widefat fixed striped" id="call-logs-table">
                <thead>
                    <tr>
                        <th>Date/Time</th>
                        <th>From Number</th>
                        <th>To Number</th>
                        <th>Status</th>
                        <th>Duration</th>
                        <th>Workflow</th>
                        <th>Queue Time</th>
                        <th>Actions Taken</th>
                        <th>Details</th>
                    </tr>
                </thead>
                <tbody>
                    <?php $this->display_call_logs_table(); ?>
                </tbody>
            </table>
        </div>
        
        <!-- Call Detail Modal -->
        <div id="call-detail-modal" class="twp-modal" style="display: none;">
            <div class="twp-modal-content">
                <h2 id="call-detail-title">Call Details</h2>
                
                <div class="call-timeline">
                    <h4>Call Timeline:</h4>
                    <div id="call-timeline-content">
                        <!-- Timeline will be populated here -->
                    </div>
                </div>
                
                <div class="call-details-grid">
                    <div class="detail-section">
                        <h4>Call Information</h4>
                        <div id="call-basic-info"></div>
                    </div>
                    
                    <div class="detail-section">
                        <h4>Actions Taken</h4>
                        <div id="call-actions-taken"></div>
                    </div>
                </div>
                
                <div class="modal-buttons">
                    <button class="button" onclick="closeCallDetailModal()">Close</button>
                </div>
            </div>
        </div>
        <?php
    }
    
    /**
     * Display agent groups page
     */
    public function display_groups_page() {
        ?>
        <div class="wrap">
            <h1>Agent Groups <button class="button button-primary" onclick="openGroupModal()">Add New Group</button></h1>
            
            <table class="wp-list-table widefat fixed striped">
                <thead>
                    <tr>
                        <th>Group Name</th>
                        <th>Description</th>
                        <th>Members</th>
                        <th>Ring Strategy</th>
                        <th>Timeout</th>
                        <th>Actions</th>
                    </tr>
                </thead>
                <tbody id="groups-list">
                    <?php
                    $groups = TWP_Agent_Groups::get_all_groups();
                    foreach ($groups as $group) {
                        $members = TWP_Agent_Groups::get_group_members($group->id);
                        $member_count = count($members);
                        ?>
                        <tr>
                            <td><?php echo esc_html($group->group_name); ?></td>
                            <td><?php echo esc_html($group->description); ?></td>
                            <td><?php echo $member_count; ?> members</td>
                            <td><?php echo esc_html($group->ring_strategy); ?></td>
                            <td><?php echo esc_html($group->timeout_seconds); ?>s</td>
                            <td>
                                <button class="button" onclick="editGroup(<?php echo $group->id; ?>)">Edit</button>
                                <button class="button" onclick="manageGroupMembers(<?php echo $group->id; ?>)">Members</button>
                                <button class="button" onclick="deleteGroup(<?php echo $group->id; ?>)">Delete</button>
                            </td>
                        </tr>
                        <?php
                    }
                    ?>
                </tbody>
            </table>
        </div>
        
        <!-- Group Modal -->
        <div id="group-modal" class="twp-modal" style="display: none;">
            <div class="twp-modal-content">
                <div class="twp-modal-header">
                    <h2 id="group-modal-title">Add New Group</h2>
                    <button class="twp-modal-close" onclick="closeGroupModal()">&times;</button>
                </div>
                <div class="twp-modal-body">
                    <form id="group-form">
                        <input type="hidden" id="group-id" name="group_id" value="">
                        
                        <label>Group Name:</label>
                        <input type="text" name="group_name" required class="regular-text">
                        
                        <label>Description:</label>
                        <textarea name="description" rows="3" class="regular-text"></textarea>
                        
                        <label>Ring Strategy:</label>
                        <select name="ring_strategy">
                            <option value="simultaneous">Simultaneous (ring all at once)</option>
                            <option value="sequential">Sequential (ring in order)</option>
                        </select>
                        
                        <label>Timeout (seconds):</label>
                        <input type="number" name="timeout_seconds" value="30" min="5" max="120">
                    </form>
                </div>
                <div class="twp-modal-footer">
                    <button class="button button-primary" onclick="saveGroup()">Save Group</button>
                    <button class="button" onclick="closeGroupModal()">Cancel</button>
                </div>
            </div>
        </div>
        
        <!-- Members Modal -->
        <div id="members-modal" class="twp-modal" style="display: none;">
            <div class="twp-modal-content" style="max-width: 800px;">
                <div class="twp-modal-header">
                    <h2 id="members-modal-title">Manage Group Members</h2>
                    <button class="twp-modal-close" onclick="closeMembersModal()">&times;</button>
                </div>
                <div class="twp-modal-body">
                    <input type="hidden" id="current-group-id" value="">
                    
                    <div class="add-member-section">
                        <h3>Add Member</h3>
                        <select id="add-member-select">
                            <option value="">Select a user...</option>
                            <?php
                            $users = get_users(array('orderby' => 'display_name'));
                            foreach ($users as $user) {
                                $phone = get_user_meta($user->ID, 'twp_phone_number', true);
                                ?>
                                <option value="<?php echo $user->ID; ?>">
                                    <?php echo esc_html($user->display_name); ?> 
                                    <?php echo $phone ? '(' . esc_html($phone) . ')' : '(no phone)'; ?>
                                </option>
                                <?php
                            }
                            ?>
                        </select>
                        <input type="number" id="add-member-priority" placeholder="Priority" value="0" min="0">
                        <button class="button" onclick="addGroupMember()">Add Member</button>
                    </div>
                    
                    <h3>Current Members</h3>
                    <table class="wp-list-table widefat fixed striped">
                        <thead>
                            <tr>
                                <th>Name</th>
                                <th>Phone Number</th>
                                <th>Priority</th>
                                <th>Status</th>
                                <th>Actions</th>
                            </tr>
                        </thead>
                        <tbody id="group-members-list">
                            <!-- Populated by JavaScript -->
                        </tbody>
                    </table>
                </div>
                <div class="twp-modal-footer">
                    <button class="button" onclick="closeMembersModal()">Close</button>
                </div>
            </div>
        </div>
        <?php
    }
    
    /**
     * Display agent queue page
     */
    public function display_agent_queue_page() {
        $current_user_id = get_current_user_id();
        $agent_status = TWP_Agent_Manager::get_agent_status($current_user_id);
        $agent_stats = TWP_Agent_Manager::get_agent_stats($current_user_id);
        ?>
        <div class="wrap">
            <h1>Agent Queue Dashboard</h1>
            
            <div class="agent-status-bar">
                <div class="status-info">
                    <strong>Your Status:</strong>
                    <select id="agent-status-select" onchange="updateAgentStatus(this.value)">
                        <option value="available" <?php selected($agent_status->status ?? '', 'available'); ?>>Available</option>
                        <option value="busy" <?php selected($agent_status->status ?? '', 'busy'); ?>>Busy</option>
                        <option value="offline" <?php selected($agent_status->status ?? 'offline', 'offline'); ?>>Offline</option>
                    </select>
                </div>
                <div class="agent-stats">
                    <span>Calls Today: <strong><?php echo $agent_stats['calls_today']; ?></strong></span>
                    <span>Total Calls: <strong><?php echo $agent_stats['total_calls']; ?></strong></span>
                    <span>Avg Duration: <strong><?php echo round($agent_stats['avg_duration'] ?? 0); ?>s</strong></span>
                </div>
            </div>
            
            <div class="queue-section">
                <h2>Waiting Calls</h2>
                <div id="waiting-calls-container">
                    <table class="wp-list-table widefat fixed striped">
                        <thead>
                            <tr>
                                <th>Position</th>
                                <th>Queue</th>
                                <th>From Number</th>
                                <th>Wait Time</th>
                                <th>Action</th>
                            </tr>
                        </thead>
                        <tbody id="waiting-calls-list">
                            <tr><td colspan="5">Loading...</td></tr>
                        </tbody>
                    </table>
                </div>
            </div>
            
            <div class="my-groups-section">
                <h2>My Groups</h2>
                <table class="wp-list-table widefat fixed striped">
                    <thead>
                        <tr>
                            <th>Group Name</th>
                            <th>Members</th>
                            <th>Your Priority</th>
                        </tr>
                    </thead>
                    <tbody>
                        <?php
                        $my_groups = TWP_Agent_Groups::get_user_groups($current_user_id);
                        foreach ($my_groups as $group) {
                            $members = TWP_Agent_Groups::get_group_members($group->id);
                            $my_priority = 0;
                            foreach ($members as $member) {
                                if ($member->user_id == $current_user_id) {
                                    $my_priority = $member->priority;
                                    break;
                                }
                            }
                            ?>
                            <tr>
                                <td><?php echo esc_html($group->group_name); ?></td>
                                <td><?php echo count($members); ?> members</td>
                                <td><?php echo $my_priority; ?></td>
                            </tr>
                            <?php
                        }
                        ?>
                    </tbody>
                </table>
            </div>
        </div>
        
        <style>
        .agent-status-bar {
            background: #fff;
            padding: 15px;
            margin-bottom: 20px;
            border: 1px solid #ccc;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .agent-stats span {
            margin-left: 20px;
        }
        .queue-section, .my-groups-section {
            background: #fff;
            padding: 20px;
            margin-bottom: 20px;
            border: 1px solid #ccc;
        }
        #waiting-calls-list .accept-btn {
            background: #4CAF50;
            color: white;
            border: none;
            padding: 5px 15px;
            cursor: pointer;
            border-radius: 3px;
        }
        #waiting-calls-list .accept-btn:hover {
            background: #45a049;
        }
        #waiting-calls-list .accept-btn:disabled {
            background: #ccc;
            cursor: not-allowed;
        }
        </style>
        <?php
    }
    
    /**
     * Display outbound calls page
     */
    public function display_outbound_calls_page() {
        // Ensure database tables exist
        TWP_Activator::ensure_tables_exist();
        ?>
        <div class="wrap">
            <h1>Outbound Calls</h1>
            <p>Initiate outbound calls to connect customers with your phone. Click-to-call functionality allows you to dial any number.</p>
            
            <div class="outbound-call-section">
                <h2>Make an Outbound Call</h2>
                <div class="call-form">
                    <div class="form-field">
                        <label for="from-number">From Number:</label>
                        <select id="from-number" name="from_number" required>
                            <option value="">Select a number...</option>
                            <?php
                            // Get Twilio phone numbers
                            $twilio = new TWP_Twilio_API();
                            $numbers_result = $twilio->get_phone_numbers();
                            
                            if ($numbers_result['success'] && isset($numbers_result['data']['incoming_phone_numbers'])) {
                                $numbers = $numbers_result['data']['incoming_phone_numbers'];
                                if (is_array($numbers) && !empty($numbers)) {
                                    foreach ($numbers as $number) {
                                        echo '<option value="' . esc_attr($number['phone_number']) . '">' . esc_html($number['phone_number']) . '</option>';
                                    }
                                } else {
                                    echo '<option value="" disabled>No phone numbers found - purchase a number first</option>';
                                }
                            } else {
                                echo '<option value="" disabled>Error loading phone numbers - check API credentials</option>';
                                if (isset($numbers_result['error'])) {
                                    echo '<option value="" disabled>Error: ' . esc_html($numbers_result['error']) . '</option>';
                                }
                                // Debug info for troubleshooting
                                if (current_user_can('manage_options') && WP_DEBUG) {
                                    echo '<option value="" disabled>Debug: ' . esc_html(json_encode($numbers_result)) . '</option>';
                                }
                            }
                            ?>
                        </select>
                        <p class="description">Select the Twilio number to call from</p>
                    </div>
                    
                    <div class="form-field">
                        <label for="to-number">To Number:</label>
                        <input type="tel" id="to-number" name="to_number" placeholder="+1234567890" required>
                        <p class="description">Enter the number you want to call (include country code)</p>
                    </div>
                    
                    <div class="form-field">
                        <label for="agent-phone">Your Phone Number:</label>
                        <input type="tel" id="agent-phone" name="agent_phone" 
                               value="<?php echo esc_attr(get_user_meta(get_current_user_id(), 'twp_phone_number', true)); ?>" 
                               placeholder="+1234567890" required>
                        <p class="description">The number where you'll receive the call first</p>
                    </div>
                    
                    <button type="button" class="button button-primary" onclick="initiateOutboundCall()">
                        Place Call
                    </button>
                </div>
            </div>
            
            <div class="recent-calls-section">
                <h2>Recent Outbound Calls</h2>
                <table class="wp-list-table widefat fixed striped">
                    <thead>
                        <tr>
                            <th>Date/Time</th>
                            <th>From</th>
                            <th>To</th>
                            <th>Agent</th>
                            <th>Status</th>
                            <th>Duration</th>
                        </tr>
                    </thead>
                    <tbody id="recent-outbound-calls">
                        <?php
                        // Get recent outbound calls from log
                        global $wpdb;
                        $log_table = $wpdb->prefix . 'twp_call_log';
                        
                        $recent_calls = $wpdb->get_results($wpdb->prepare("
                            SELECT cl.*, u.display_name as agent_name
                            FROM $log_table cl
                            LEFT JOIN {$wpdb->users} u ON JSON_EXTRACT(cl.actions_taken, '$.agent_id') = u.ID
                            WHERE cl.workflow_name = 'Outbound Call' 
                            OR cl.status = 'outbound_initiated'
                            ORDER BY cl.created_at DESC
                            LIMIT 20
                        "));
                        
                        if (empty($recent_calls)) {
                            echo '<tr><td colspan="6">No outbound calls yet</td></tr>';
                        } else {
                            foreach ($recent_calls as $call) {
                                ?>
                                <tr>
                                    <td><?php echo esc_html(date('M j, Y g:i A', strtotime($call->created_at))); ?></td>
                                    <td><?php echo esc_html($call->from_number ?: 'N/A'); ?></td>
                                    <td><?php echo esc_html($call->to_number ?: 'N/A'); ?></td>
                                    <td><?php echo esc_html($call->agent_name ?: 'N/A'); ?></td>
                                    <td>
                                        <span class="status-<?php echo esc_attr($call->status); ?>">
                                            <?php echo esc_html(ucwords(str_replace('_', ' ', $call->status))); ?>
                                        </span>
                                    </td>
                                    <td><?php echo $call->duration ? esc_html($call->duration . 's') : 'N/A'; ?></td>
                                </tr>
                                <?php
                            }
                        }
                        ?>
                    </tbody>
                </table>
            </div>
        </div>
        
        <style>
        .outbound-call-section {
            background: #fff;
            padding: 20px;
            margin-bottom: 20px;
            border: 1px solid #ccc;
        }
        .call-form .form-field {
            margin-bottom: 15px;
        }
        .call-form label {
            display: block;
            margin-bottom: 5px;
            font-weight: bold;
        }
        .call-form input, .call-form select {
            width: 300px;
            padding: 8px;
            border: 1px solid #ddd;
            border-radius: 3px;
        }
        .call-form .description {
            margin-top: 5px;
            color: #666;
            font-style: italic;
        }
        .recent-calls-section {
            background: #fff;
            padding: 20px;
            border: 1px solid #ccc;
        }
        .status-completed { color: #4CAF50; }
        .status-outbound_initiated { color: #2196F3; }
        .status-busy, .status-failed { color: #f44336; }
        .status-no-answer { color: #ff9800; }
        </style>
        
        <script>
        function initiateOutboundCall() {
            const fromNumber = document.getElementById('from-number').value;
            const toNumber = document.getElementById('to-number').value;
            const agentPhone = document.getElementById('agent-phone').value;
            
            if (!fromNumber || !toNumber || !agentPhone) {
                alert('Please fill in all fields');
                return;
            }
            
            // Validate phone number format
            const phoneRegex = /^\+?[1-9]\d{1,14}$/;
            if (!phoneRegex.test(toNumber.replace(/[\s\-\(\)]/g, ''))) {
                alert('Please enter a valid phone number with country code (e.g., +1234567890)');
                return;
            }
            
            const button = event.target;
            button.disabled = true;
            button.textContent = 'Placing Call...';
            
            jQuery.post(twp_ajax.ajax_url, {
                action: 'twp_initiate_outbound_call_with_from',
                from_number: fromNumber,
                to_number: toNumber,
                agent_phone: agentPhone,
                nonce: twp_ajax.nonce
            }, function(response) {
                if (response.success) {
                    alert('Call initiated! You should receive a call on ' + agentPhone + ' shortly, then the call will connect to ' + toNumber);
                    // Clear form
                    document.getElementById('to-number').value = '';
                    // Refresh recent calls (you could implement this)
                } else {
                    alert('Error initiating call: ' + (response.data.message || response.data || 'Unknown error'));
                }
            }).fail(function() {
                alert('Failed to initiate call. Please try again.');
            }).always(function() {
                button.disabled = false;
                button.textContent = 'Place Call';
            });
        }
        </script>
        <?php
    }
    
    /**
     * Display voicemails table content
     */
    private function display_voicemails_table() {
        global $wpdb;
        $voicemails_table = $wpdb->prefix . 'twp_voicemails';
        $workflows_table = $wpdb->prefix . 'twp_workflows';
        
        $voicemails = $wpdb->get_results("
            SELECT v.*, w.workflow_name 
            FROM $voicemails_table v
            LEFT JOIN $workflows_table w ON v.workflow_id = w.id
            ORDER BY v.created_at DESC
            LIMIT 50
        ");
        
        foreach ($voicemails as $voicemail) {
            ?>
            <tr>
                <td><?php echo esc_html(date('M j, Y g:i A', strtotime($voicemail->created_at))); ?></td>
                <td><?php echo esc_html($voicemail->from_number); ?></td>
                <td><?php echo esc_html($voicemail->workflow_name ?: 'N/A'); ?></td>
                <td><?php echo $voicemail->duration ? esc_html($voicemail->duration . 's') : 'Unknown'; ?></td>
                <td>
                    <?php if ($voicemail->transcription): ?>
                        <span class="transcription-preview" title="<?php echo esc_attr($voicemail->transcription); ?>">
                            <?php echo esc_html(substr($voicemail->transcription, 0, 50) . '...'); ?>
                        </span>
                    <?php else: ?>
                        <em>No transcription</em>
                    <?php endif; ?>
                </td>
                <td>
                    <?php if ($voicemail->recording_url): ?>
                        <button class="button button-small" 
                                onclick="playVoicemail(<?php echo $voicemail->id; ?>, '<?php echo esc_js($voicemail->recording_url); ?>')">
                            Play
                        </button>
                    <?php else: ?>
                        <em>No recording</em>
                    <?php endif; ?>
                </td>
                <td>
                    <button class="button button-small" onclick="viewVoicemail(<?php echo $voicemail->id; ?>)">View</button>
                    <button class="button button-small button-danger" onclick="deleteVoicemailConfirm(<?php echo $voicemail->id; ?>)">Delete</button>
                </td>
            </tr>
            <?php
        }
        
        if (empty($voicemails)) {
            echo '<tr><td colspan="7">No voicemails found.</td></tr>';
        }
    }
    
    /**
     * Display call logs table content
     */
    private function display_call_logs_table() {
        global $wpdb;
        $logs_table = $wpdb->prefix . 'twp_call_log';
        
        $logs = $wpdb->get_results("
            SELECT *
            FROM $logs_table
            ORDER BY created_at DESC
            LIMIT 100
        ");
        
        foreach ($logs as $log) {
            ?>
            <tr>
                <td><?php echo esc_html(date('M j, Y g:i A', strtotime($log->created_at))); ?></td>
                <td><?php echo esc_html($log->from_number ?: 'Unknown'); ?></td>
                <td><?php echo esc_html($log->to_number ?: 'System'); ?></td>
                <td>
                    <span class="status-badge status-<?php echo esc_attr(strtolower($log->status)); ?>">
                        <?php echo esc_html(ucfirst($log->status)); ?>
                    </span>
                </td>
                <td><?php echo $log->duration ? esc_html($log->duration . 's') : '-'; ?></td>
                <td><?php echo esc_html($log->workflow_name ?: 'N/A'); ?></td>
                <td><?php echo $log->queue_time ? esc_html($log->queue_time . 's') : '-'; ?></td>
                <td><?php echo esc_html($log->actions_taken ?: 'None'); ?></td>
                <td>
                    <button class="button button-small" onclick="viewCallDetails('<?php echo esc_js($log->call_sid); ?>')">
                        View
                    </button>
                </td>
            </tr>
            <?php
        }
        
        if (empty($logs)) {
            echo '<tr><td colspan="9">No call logs found.</td></tr>';
        }
    }
    
    /**
     * Show admin notices
     */
    public function show_admin_notices() {
        // Check if we're on a plugin page
        $screen = get_current_screen();
        if (!$screen || strpos($screen->id, 'twilio-wp') === false) {
            return;
        }
        
        // Check if database tables exist
        require_once TWP_PLUGIN_DIR . 'includes/class-twp-activator.php';
        $tables_exist = TWP_Activator::ensure_tables_exist();
        
        if (!$tables_exist) {
            ?>
            <div class="notice notice-warning is-dismissible">
                <p>
                    <strong>Twilio WP Plugin:</strong> Database tables were missing and have been created automatically. 
                    If you continue to experience issues, please deactivate and reactivate the plugin.
                </p>
            </div>
            <?php
        }
        
        // Check if ElevenLabs API key is configured
        if (empty(get_option('twp_elevenlabs_api_key'))) {
            ?>
            <div class="notice notice-info is-dismissible">
                <p>
                    <strong>Twilio WP Plugin:</strong> To use text-to-speech features, please configure your 
                    <a href="<?php echo admin_url('admin.php?page=twilio-wp-settings'); ?>">ElevenLabs API key</a>.
                </p>
            </div>
            <?php
        }
        
        // Check if Twilio credentials are configured
        if (empty(get_option('twp_twilio_account_sid')) || empty(get_option('twp_twilio_auth_token'))) {
            ?>
            <div class="notice notice-error">
                <p>
                    <strong>Twilio WP Plugin:</strong> Please configure your 
                    <a href="<?php echo admin_url('admin.php?page=twilio-wp-settings'); ?>">Twilio credentials</a> 
                    to start using the plugin.
                </p>
            </div>
            <?php
        }
    }
    
    /**
     * Register settings
     */
    public function register_settings() {
        register_setting('twilio-wp-settings-group', 'twp_twilio_account_sid');
        register_setting('twilio-wp-settings-group', 'twp_twilio_auth_token');
        register_setting('twilio-wp-settings-group', 'twp_twiml_app_sid');
        register_setting('twilio-wp-settings-group', 'twp_elevenlabs_api_key');
        register_setting('twilio-wp-settings-group', 'twp_elevenlabs_voice_id');
        register_setting('twilio-wp-settings-group', 'twp_elevenlabs_model_id');
        register_setting('twilio-wp-settings-group', 'twp_default_queue_timeout');
        register_setting('twilio-wp-settings-group', 'twp_default_queue_size');
        register_setting('twilio-wp-settings-group', 'twp_urgent_keywords');
        register_setting('twilio-wp-settings-group', 'twp_sms_notification_number');
        register_setting('twilio-wp-settings-group', 'twp_default_sms_number');
    }
    
    /**
     * Enqueue styles
     */
    public function enqueue_styles() {
        // Enqueue ThickBox styles for WordPress native modals
        wp_enqueue_style('thickbox');
        
        wp_enqueue_style(
            $this->plugin_name,
            TWP_PLUGIN_URL . 'assets/css/admin.css',
            array('thickbox'),
            $this->version,
            'all'
        );
    }
    
    /**
     * Enqueue scripts
     */
    public function enqueue_scripts() {
        // Enqueue ThickBox for WordPress native modals
        wp_enqueue_script('thickbox');
        
        wp_enqueue_script(
            $this->plugin_name,
            TWP_PLUGIN_URL . 'assets/js/admin.js',
            array('jquery', 'thickbox'),
            $this->version,
            false
        );
        
        wp_localize_script(
            $this->plugin_name,
            'twp_ajax',
            array(
                'ajax_url' => admin_url('admin-ajax.php'),
                'nonce' => wp_create_nonce('twp_ajax_nonce'),
                'rest_url' => rest_url(),
                'has_elevenlabs_key' => !empty(get_option('twp_elevenlabs_api_key')),
                'timezone' => wp_timezone_string()
            )
        );
    }
    
    /**
     * AJAX handler for saving schedule
     */
    public function ajax_save_schedule() {
        check_ajax_referer('twp_ajax_nonce', 'nonce');
        
        if (!current_user_can('manage_options')) {
            wp_die('Unauthorized');
        }
        
        // Debug logging - log incoming POST data
        error_log('TWP Schedule Save: POST data: ' . print_r($_POST, true));
        
        $schedule_id = isset($_POST['schedule_id']) ? intval($_POST['schedule_id']) : 0;
        
        // Remove duplicate days and sanitize
        $days_of_week = isset($_POST['days_of_week']) ? $_POST['days_of_week'] : array();
        $unique_days = array_unique(array_map('sanitize_text_field', $days_of_week));
        
        $data = array(
            'schedule_name' => sanitize_text_field($_POST['schedule_name']),
            'days_of_week' => implode(',', $unique_days),
            'start_time' => sanitize_text_field($_POST['start_time']),
            'end_time' => sanitize_text_field($_POST['end_time']),
            'workflow_id' => isset($_POST['workflow_id']) && !empty($_POST['workflow_id']) ? intval($_POST['workflow_id']) : null,
            'holiday_dates' => isset($_POST['holiday_dates']) ? sanitize_textarea_field($_POST['holiday_dates']) : '',
            'is_active' => isset($_POST['is_active']) ? 1 : 0
        );
        
        // Add optional fields if provided
        if (!empty($_POST['phone_number'])) {
            $data['phone_number'] = sanitize_text_field($_POST['phone_number']);
        }
        
        if (!empty($_POST['forward_number'])) {
            $data['forward_number'] = sanitize_text_field($_POST['forward_number']);
        }
        
        if (!empty($_POST['after_hours_action'])) {
            $data['after_hours_action'] = sanitize_text_field($_POST['after_hours_action']);
        }
        
        if (!empty($_POST['after_hours_workflow_id'])) {
            $data['after_hours_workflow_id'] = intval($_POST['after_hours_workflow_id']);
        }
        
        if (!empty($_POST['after_hours_forward_number'])) {
            $data['after_hours_forward_number'] = sanitize_text_field($_POST['after_hours_forward_number']);
        }
        
        // Debug logging - log processed data
        error_log('TWP Schedule Save: Processed data: ' . print_r($data, true));
        error_log('TWP Schedule Save: Schedule ID: ' . $schedule_id);
        
        if ($schedule_id) {
            error_log('TWP Schedule Save: Updating existing schedule');
            $result = TWP_Scheduler::update_schedule($schedule_id, $data);
        } else {
            error_log('TWP Schedule Save: Creating new schedule');
            $result = TWP_Scheduler::create_schedule($data);
        }
        
        error_log('TWP Schedule Save: Result: ' . ($result ? 'true' : 'false'));
        
        wp_send_json_success(array('success' => $result));
    }
    
    /**
     * AJAX handler for deleting schedule
     */
    public function ajax_delete_schedule() {
        check_ajax_referer('twp_ajax_nonce', 'nonce');
        
        if (!current_user_can('manage_options')) {
            wp_die('Unauthorized');
        }
        
        $schedule_id = intval($_POST['schedule_id']);
        $result = TWP_Scheduler::delete_schedule($schedule_id);
        
        wp_send_json_success(array('success' => $result));
    }
    
    /**
     * AJAX handler for getting all schedules
     */
    public function ajax_get_schedules() {
        check_ajax_referer('twp_ajax_nonce', 'nonce');
        
        if (!current_user_can('manage_options')) {
            wp_die('Unauthorized');
        }
        
        $schedules = TWP_Scheduler::get_schedules();
        wp_send_json_success($schedules);
    }
    
    /**
     * AJAX handler for getting a single schedule
     */
    public function ajax_get_schedule() {
        check_ajax_referer('twp_ajax_nonce', 'nonce');
        
        if (!current_user_can('manage_options')) {
            wp_die('Unauthorized');
        }
        
        $schedule_id = intval($_POST['schedule_id']);
        $schedule = TWP_Scheduler::get_schedule($schedule_id);
        
        if ($schedule) {
            wp_send_json_success($schedule);
        } else {
            wp_send_json_error('Schedule not found');
        }
    }
    
    /**
     * AJAX handler for saving workflow
     */
    public function ajax_save_workflow() {
        check_ajax_referer('twp_ajax_nonce', 'nonce');
        
        if (!current_user_can('manage_options')) {
            wp_die('Unauthorized');
        }
        
        $workflow_id = isset($_POST['workflow_id']) ? intval($_POST['workflow_id']) : 0;
        
        // Parse the workflow data JSON
        $workflow_data_json = isset($_POST['workflow_data']) ? stripslashes($_POST['workflow_data']) : '{}';
        
        // Log for debugging
        error_log('TWP Workflow Save - Raw data: ' . $workflow_data_json);
        
        // Handle empty workflow data
        if (empty($workflow_data_json) || $workflow_data_json === '{}') {
            $workflow_data_parsed = array(
                'steps' => array(),
                'conditions' => array(),
                'actions' => array()
            );
        } else {
            $workflow_data_parsed = json_decode($workflow_data_json, true);
            
            if (json_last_error() !== JSON_ERROR_NONE) {
                error_log('TWP Workflow Save - JSON Error: ' . json_last_error_msg());
                wp_send_json_error('Invalid workflow data format: ' . json_last_error_msg());
                return;
            }
        }
        
        $data = array(
            'workflow_name' => sanitize_text_field($_POST['workflow_name']),
            'phone_number' => sanitize_text_field($_POST['phone_number']),
            'steps' => isset($workflow_data_parsed['steps']) ? $workflow_data_parsed['steps'] : array(),
            'conditions' => isset($workflow_data_parsed['conditions']) ? $workflow_data_parsed['conditions'] : array(),
            'actions' => isset($workflow_data_parsed['actions']) ? $workflow_data_parsed['actions'] : array(),
            'is_active' => isset($_POST['is_active']) ? intval($_POST['is_active']) : 0,
            'workflow_data' => $workflow_data_json // Keep the raw JSON for update_workflow
        );
        
        if ($workflow_id) {
            $result = TWP_Workflow::update_workflow($workflow_id, $data);
        } else {
            $result = TWP_Workflow::create_workflow($data);
        }
        
        if ($result === false) {
            wp_send_json_error('Failed to save workflow to database');
        } else {
            global $wpdb;
            wp_send_json_success(array('success' => true, 'workflow_id' => $workflow_id ?: $wpdb->insert_id));
        }
    }
    
    /**
     * AJAX handler for getting workflow
     */
    public function ajax_get_workflow() {
        check_ajax_referer('twp_ajax_nonce', 'nonce');
        
        if (!current_user_can('manage_options')) {
            wp_die('Unauthorized');
        }
        
        $workflow_id = intval($_POST['workflow_id']);
        $workflow = TWP_Workflow::get_workflow($workflow_id);
        
        wp_send_json_success($workflow);
    }
    
    /**
     * AJAX handler for deleting workflow
     */
    public function ajax_delete_workflow() {
        check_ajax_referer('twp_ajax_nonce', 'nonce');
        
        if (!current_user_can('manage_options')) {
            wp_die('Unauthorized');
        }
        
        $workflow_id = intval($_POST['workflow_id']);
        $result = TWP_Workflow::delete_workflow($workflow_id);
        
        wp_send_json_success(array('success' => $result));
    }
    
    /**
     * AJAX handler for getting phone numbers
     */
    public function ajax_get_phone_numbers() {
        check_ajax_referer('twp_ajax_nonce', 'nonce');
        
        if (!current_user_can('manage_options') && !current_user_can('twp_access_phone_numbers')) {
            wp_die('Unauthorized');
        }
        
        $twilio = new TWP_Twilio_API();
        $result = $twilio->get_phone_numbers();
        
        if ($result['success']) {
            wp_send_json_success($result['data']['incoming_phone_numbers']);
        } else {
            wp_send_json_error($result['error']);
        }
    }
    
    /**
     * AJAX handler for searching available phone numbers
     */
    public function ajax_search_available_numbers() {
        check_ajax_referer('twp_ajax_nonce', 'nonce');
        
        if (!current_user_can('manage_options')) {
            wp_die('Unauthorized');
        }
        
        $country_code = sanitize_text_field($_POST['country_code']);
        $area_code = sanitize_text_field($_POST['area_code']);
        $contains = sanitize_text_field($_POST['contains']);
        
        $twilio = new TWP_Twilio_API();
        $result = $twilio->search_available_numbers($country_code, $area_code, $contains);
        
        if ($result['success']) {
            wp_send_json_success($result['data']['available_phone_numbers']);
        } else {
            wp_send_json_error($result['error']);
        }
    }
    
    /**
     * AJAX handler for purchasing a phone number
     */
    public function ajax_purchase_number() {
        check_ajax_referer('twp_ajax_nonce', 'nonce');
        
        if (!current_user_can('manage_options')) {
            wp_die('Unauthorized');
        }
        
        $phone_number = sanitize_text_field($_POST['phone_number']);
        $voice_url = isset($_POST['voice_url']) ? esc_url_raw($_POST['voice_url']) : null;
        $sms_url = isset($_POST['sms_url']) ? esc_url_raw($_POST['sms_url']) : null;
        
        $twilio = new TWP_Twilio_API();
        $result = $twilio->purchase_phone_number($phone_number, $voice_url, $sms_url);
        
        wp_send_json($result);
    }
    
    /**
     * AJAX handler for configuring a phone number
     */
    public function ajax_configure_number() {
        check_ajax_referer('twp_ajax_nonce', 'nonce');
        
        if (!current_user_can('manage_options')) {
            wp_die('Unauthorized');
        }
        
        $number_sid = sanitize_text_field($_POST['number_sid']);
        $voice_url = esc_url_raw($_POST['voice_url']);
        $sms_url = esc_url_raw($_POST['sms_url']);
        
        $twilio = new TWP_Twilio_API();
        $result = $twilio->configure_phone_number($number_sid, $voice_url, $sms_url);
        
        wp_send_json($result);
    }
    
    /**
     * AJAX handler for releasing a phone number
     */
    public function ajax_release_number() {
        check_ajax_referer('twp_ajax_nonce', 'nonce');
        
        if (!current_user_can('manage_options')) {
            wp_die('Unauthorized');
        }
        
        $number_sid = sanitize_text_field($_POST['number_sid']);
        
        $twilio = new TWP_Twilio_API();
        $result = $twilio->release_phone_number($number_sid);
        
        wp_send_json($result);
    }
    
    /**
     * AJAX handler for getting queue details
     */
    public function ajax_get_queue() {
        check_ajax_referer('twp_ajax_nonce', 'nonce');
        
        if (!current_user_can('manage_options')) {
            wp_die('Unauthorized');
        }
        
        $queue_id = intval($_POST['queue_id']);
        $queue = TWP_Call_Queue::get_queue($queue_id);
        
        wp_send_json_success($queue);
    }
    
    /**
     * AJAX handler for saving queue
     */
    public function ajax_save_queue() {
        check_ajax_referer('twp_ajax_nonce', 'nonce');
        
        if (!current_user_can('manage_options')) {
            wp_die('Unauthorized');
        }
        
        $queue_id = isset($_POST['queue_id']) ? intval($_POST['queue_id']) : 0;
        
        $data = array(
            'queue_name' => sanitize_text_field($_POST['queue_name']),
            'notification_number' => sanitize_text_field($_POST['notification_number']),
            'agent_group_id' => !empty($_POST['agent_group_id']) ? intval($_POST['agent_group_id']) : null,
            'max_size' => intval($_POST['max_size']),
            'wait_music_url' => esc_url_raw($_POST['wait_music_url']),
            'tts_message' => sanitize_textarea_field($_POST['tts_message']),
            'timeout_seconds' => intval($_POST['timeout_seconds'])
        );
        
        if ($queue_id) {
            // Update existing queue
            $result = TWP_Call_Queue::update_queue($queue_id, $data);
        } else {
            // Create new queue
            $result = TWP_Call_Queue::create_queue($data);
        }
        
        wp_send_json_success(array('success' => $result));
    }
    
    /**
     * AJAX handler for getting queue details with call info
     */
    public function ajax_get_queue_details() {
        check_ajax_referer('twp_ajax_nonce', 'nonce');
        
        if (!current_user_can('manage_options')) {
            wp_die('Unauthorized');
        }
        
        $queue_id = intval($_POST['queue_id']);
        $queue = TWP_Call_Queue::get_queue($queue_id);
        
        if (!$queue) {
            wp_send_json_error('Queue not found');
        }
        
        global $wpdb;
        $calls_table = $wpdb->prefix . 'twp_queued_calls';
        
        // Get current waiting calls
        $waiting_calls = $wpdb->get_results($wpdb->prepare(
            "SELECT * FROM $calls_table WHERE queue_id = %d AND status = 'waiting' ORDER BY position ASC",
            $queue_id
        ));
        
        // Calculate average wait time
        $avg_wait = $wpdb->get_var($wpdb->prepare(
            "SELECT AVG(TIMESTAMPDIFF(SECOND, joined_at, answered_at)) 
             FROM $calls_table 
             WHERE queue_id = %d AND status = 'answered' 
             AND joined_at >= DATE_SUB(NOW(), INTERVAL 24 HOUR)",
            $queue_id
        ));
        
        $queue_status = TWP_Call_Queue::get_queue_status();
        $waiting_count = 0;
        
        foreach ($queue_status as $status) {
            if ($status['queue_id'] == $queue_id) {
                $waiting_count = $status['waiting_calls'];
                break;
            }
        }
        
        wp_send_json_success(array(
            'queue' => $queue,
            'waiting_calls' => $waiting_count,
            'avg_wait_time' => $avg_wait ? round($avg_wait) . ' seconds' : 'N/A',
            'calls' => $waiting_calls
        ));
    }
    
    /**
     * AJAX handler for getting all queues
     */
    public function ajax_get_all_queues() {
        check_ajax_referer('twp_ajax_nonce', 'nonce');
        
        if (!current_user_can('manage_options')) {
            wp_die('Unauthorized');
        }
        
        $queues = TWP_Call_Queue::get_all_queues();
        
        wp_send_json_success($queues);
    }
    
    /**
     * AJAX handler for deleting queue
     */
    public function ajax_delete_queue() {
        check_ajax_referer('twp_ajax_nonce', 'nonce');
        
        if (!current_user_can('manage_options')) {
            wp_die('Unauthorized');
        }
        
        $queue_id = intval($_POST['queue_id']);
        $result = TWP_Call_Queue::delete_queue($queue_id);
        
        wp_send_json_success(array('success' => $result));
    }
    
    /**
     * AJAX handler for dashboard stats
     */
    public function ajax_get_dashboard_stats() {
        check_ajax_referer('twp_ajax_nonce', 'nonce');
        
        if (!current_user_can('manage_options')) {
            wp_die('Unauthorized');
        }
        
        // Ensure database tables exist
        require_once TWP_PLUGIN_DIR . 'includes/class-twp-activator.php';
        $tables_exist = TWP_Activator::ensure_tables_exist();
        
        global $wpdb;
        $calls_table = $wpdb->prefix . 'twp_queued_calls';
        $log_table = $wpdb->prefix . 'twp_call_log';
        
        $active_calls = 0;
        $queued_calls = 0;
        $recent_calls = array();
        
        try {
            // Check if tables exist before querying
            $calls_table_exists = $wpdb->get_var($wpdb->prepare("SHOW TABLES LIKE %s", $calls_table));
            $log_table_exists = $wpdb->get_var($wpdb->prepare("SHOW TABLES LIKE %s", $log_table));
            
            if ($calls_table_exists) {
                // First, clean up old answered calls that might be stuck (older than 2 hours)
                $wpdb->query(
                    "UPDATE $calls_table 
                     SET status = 'completed', ended_at = NOW() 
                     WHERE status = 'answered' 
                     AND joined_at < DATE_SUB(NOW(), INTERVAL 2 HOUR)"
                );
                
                // Get active calls - only recent ones to avoid counting stuck records
                $active_calls = $wpdb->get_var(
                    "SELECT COUNT(*) FROM $calls_table 
                     WHERE status IN ('waiting', 'answered') 
                     AND joined_at >= DATE_SUB(NOW(), INTERVAL 4 HOUR)"
                );
                
                // Get queued calls
                $queued_calls = $wpdb->get_var(
                    "SELECT COUNT(*) FROM $calls_table WHERE status = 'waiting'"
                );
            }
            
            if ($log_table_exists) {
                // Get recent calls from last 24 hours
                $recent_calls = $wpdb->get_results(
                    "SELECT call_sid, status, duration, updated_at 
                     FROM $log_table 
                     WHERE updated_at >= DATE_SUB(NOW(), INTERVAL 24 HOUR) 
                     ORDER BY updated_at DESC 
                     LIMIT 10"
                );
            }
        } catch (Exception $e) {
            error_log('TWP Plugin Dashboard Stats Error: ' . $e->getMessage());
            // Continue with default values
        }
        
        $formatted_calls = array();
        foreach ($recent_calls as $call) {
            $formatted_calls[] = array(
                'time' => date('H:i', strtotime($call->updated_at)),
                'from' => substr($call->call_sid, 0, 10) . '...',
                'to' => 'System',
                'status' => ucfirst($call->status),
                'duration' => $call->duration ? $call->duration . 's' : '-'
            );
        }
        
        wp_send_json_success(array(
            'active_calls' => $active_calls ?: 0,
            'queued_calls' => $queued_calls ?: 0,
            'recent_calls' => $formatted_calls
        ));
    }
    
    /**
     * AJAX handler for getting Eleven Labs voices
     */
    public function ajax_get_elevenlabs_voices() {
        check_ajax_referer('twp_ajax_nonce', 'nonce');
        
        if (!current_user_can('manage_options')) {
            wp_die('Unauthorized');
        }
        
        $elevenlabs = new TWP_ElevenLabs_API();
        $result = $elevenlabs->get_cached_voices();
        
        if ($result['success']) {
            wp_send_json_success($result['data']['voices']);
        } else {
            $error_message = 'Failed to load voices';
            if (is_string($result['error'])) {
                $error_message = $result['error'];
            } elseif (is_array($result['error']) && isset($result['error']['detail'])) {
                $error_message = $result['error']['detail'];
            } elseif (is_array($result['error']) && isset($result['error']['error'])) {
                $error_message = $result['error']['error'];
            }
            
            // Check if it's an API key issue and provide better error messages
            if (empty(get_option('twp_elevenlabs_api_key'))) {
                $error_message = 'Please configure your ElevenLabs API key in the settings first.';
            } elseif (strpos(strtolower($error_message), 'unauthorized') !== false || 
                      strpos(strtolower($error_message), 'invalid') !== false ||
                      strpos(strtolower($error_message), '401') !== false) {
                $error_message = 'Invalid API key. Please check your ElevenLabs API key in the settings.';
            } elseif (strpos(strtolower($error_message), 'quota') !== false ||
                      strpos(strtolower($error_message), 'limit') !== false) {
                $error_message = 'API quota exceeded. Please check your ElevenLabs subscription limits.';
            } elseif (strpos(strtolower($error_message), 'network') !== false ||
                      strpos(strtolower($error_message), 'timeout') !== false ||
                      strpos(strtolower($error_message), 'connection') !== false) {
                $error_message = 'Network error connecting to ElevenLabs. Please try again later.';
            } elseif ($error_message === 'Failed to load voices') {
                // Generic error - provide more helpful message
                $api_key = get_option('twp_elevenlabs_api_key');
                if (empty($api_key)) {
                    $error_message = 'No ElevenLabs API key configured. Please add your API key in the settings.';
                } else {
                    $error_message = 'Unable to connect to ElevenLabs API. Please check your API key and internet connection.';
                }
            }
            
            wp_send_json_error($error_message);
        }
    }
    
    /**
     * AJAX handler for getting ElevenLabs models
     */
    public function ajax_get_elevenlabs_models() {
        check_ajax_referer('twp_ajax_nonce', 'nonce');
        
        if (!current_user_can('manage_options')) {
            wp_die('Unauthorized');
        }
        
        $elevenlabs = new TWP_ElevenLabs_API();
        $result = $elevenlabs->get_cached_models();
        
        if ($result['success']) {
            wp_send_json_success($result['data']);
        } else {
            $error_message = 'Failed to load models';
            if (is_string($result['error'])) {
                $error_message = $result['error'];
            } elseif (is_array($result['error']) && isset($result['error']['detail'])) {
                $error_message = $result['error']['detail'];
            } elseif (is_array($result['error']) && isset($result['error']['error'])) {
                $error_message = $result['error']['error'];
            }
            
            // Check if it's an API key issue and provide better error messages
            if (empty(get_option('twp_elevenlabs_api_key'))) {
                $error_message = 'Please configure your ElevenLabs API key in the settings first.';
            } elseif (strpos(strtolower($error_message), 'unauthorized') !== false || 
                      strpos(strtolower($error_message), 'invalid') !== false ||
                      strpos(strtolower($error_message), '401') !== false) {
                $error_message = 'Invalid API key. Please check your ElevenLabs API key in the settings.';
            } elseif (strpos(strtolower($error_message), 'quota') !== false ||
                      strpos(strtolower($error_message), 'limit') !== false) {
                $error_message = 'API quota exceeded. Please check your ElevenLabs subscription limits.';
            } elseif (strpos(strtolower($error_message), 'network') !== false ||
                      strpos(strtolower($error_message), 'timeout') !== false ||
                      strpos(strtolower($error_message), 'connection') !== false) {
                $error_message = 'Network error connecting to ElevenLabs. Please try again later.';
            } elseif ($error_message === 'Failed to load models') {
                // Generic error - provide more helpful message
                $api_key = get_option('twp_elevenlabs_api_key');
                if (empty($api_key)) {
                    $error_message = 'No ElevenLabs API key configured. Please add your API key in the settings.';
                } else {
                    $error_message = 'Unable to connect to ElevenLabs API. Please check your API key and internet connection.';
                }
            }
            
            wp_send_json_error($error_message);
        }
    }
    
    /**
     * AJAX handler for previewing a voice
     */
    public function ajax_preview_voice() {
        check_ajax_referer('twp_ajax_nonce', 'nonce');
        
        if (!current_user_can('manage_options')) {
            wp_die('Unauthorized');
        }
        
        $voice_id = sanitize_text_field($_POST['voice_id']);
        $text = sanitize_text_field($_POST['text']) ?: 'Hello, this is a preview of this voice.';
        
        $elevenlabs = new TWP_ElevenLabs_API();
        $result = $elevenlabs->text_to_speech($text, $voice_id);
        
        if ($result['success']) {
            wp_send_json_success(array(
                'audio_url' => $result['file_url']
            ));
        } else {
            $error_message = 'Failed to generate voice preview';
            if (is_string($result['error'])) {
                $error_message = $result['error'];
            } elseif (is_array($result['error']) && isset($result['error']['detail'])) {
                $error_message = $result['error']['detail'];
            } elseif (is_array($result['error']) && isset($result['error']['error'])) {
                $error_message = $result['error']['error'];
            }
            
            wp_send_json_error($error_message);
        }
    }
    
    /**
     * AJAX handler to get voicemail details
     */
    public function ajax_get_voicemail() {
        check_ajax_referer('twp_ajax_nonce', 'nonce');
        
        $voicemail_id = intval($_POST['voicemail_id']);
        
        if (!$voicemail_id) {
            wp_send_json_error('Invalid voicemail ID');
        }
        
        global $wpdb;
        $table_name = $wpdb->prefix . 'twp_voicemails';
        
        $voicemail = $wpdb->get_row($wpdb->prepare(
            "SELECT * FROM $table_name WHERE id = %d",
            $voicemail_id
        ));
        
        if ($voicemail) {
            wp_send_json_success($voicemail);
        } else {
            wp_send_json_error('Voicemail not found');
        }
    }
    
    /**
     * AJAX handler to delete voicemail
     */
    public function ajax_delete_voicemail() {
        check_ajax_referer('twp_ajax_nonce', 'nonce');
        
        $voicemail_id = intval($_POST['voicemail_id']);
        
        if (!$voicemail_id) {
            wp_send_json_error('Invalid voicemail ID');
        }
        
        global $wpdb;
        $table_name = $wpdb->prefix . 'twp_voicemails';
        
        $result = $wpdb->delete(
            $table_name,
            array('id' => $voicemail_id),
            array('%d')
        );
        
        if ($result !== false) {
            wp_send_json_success('Voicemail deleted successfully');
        } else {
            wp_send_json_error('Error deleting voicemail');
        }
    }
    
    /**
     * AJAX handler to get voicemail audio URL
     */
    public function ajax_get_voicemail_audio() {
        check_ajax_referer('twp_ajax_nonce', 'nonce');
        
        if (!current_user_can('manage_options')) {
            wp_send_json_error('Unauthorized');
            return;
        }
        
        $voicemail_id = isset($_POST['voicemail_id']) ? intval($_POST['voicemail_id']) : 0;
        
        if (!$voicemail_id) {
            wp_send_json_error('Invalid voicemail ID');
            return;
        }
        
        global $wpdb;
        $table_name = $wpdb->prefix . 'twp_voicemails';
        
        $voicemail = $wpdb->get_row($wpdb->prepare(
            "SELECT recording_url FROM $table_name WHERE id = %d",
            $voicemail_id
        ));
        
        if (!$voicemail || !$voicemail->recording_url) {
            wp_send_json_error('Voicemail not found');
            return;
        }
        
        // Fetch the audio from Twilio using authenticated request
        $account_sid = get_option('twp_twilio_account_sid');
        $auth_token = get_option('twp_twilio_auth_token');
        
        // Add .mp3 to the URL if not present
        $audio_url = $voicemail->recording_url;
        if (strpos($audio_url, '.mp3') === false && strpos($audio_url, '.wav') === false) {
            $audio_url .= '.mp3';
        }
        
        // Log for debugging
        error_log('TWP Voicemail Audio - Fetching from: ' . $audio_url);
        
        // Fetch audio with authentication
        $response = wp_remote_get($audio_url, array(
            'headers' => array(
                'Authorization' => 'Basic ' . base64_encode($account_sid . ':' . $auth_token)
            ),
            'timeout' => 30
        ));
        
        if (is_wp_error($response)) {
            error_log('TWP Voicemail Audio - Error: ' . $response->get_error_message());
            wp_send_json_error('Unable to fetch audio: ' . $response->get_error_message());
            return;
        }
        
        $response_code = wp_remote_retrieve_response_code($response);
        if ($response_code !== 200) {
            error_log('TWP Voicemail Audio - HTTP Error: ' . $response_code);
            wp_send_json_error('Audio fetch failed with code: ' . $response_code);
            return;
        }
        
        $body = wp_remote_retrieve_body($response);
        $content_type = wp_remote_retrieve_header($response, 'content-type') ?: 'audio/mpeg';
        
        // Return audio as base64 data URL
        $base64_audio = base64_encode($body);
        $data_url = 'data:' . $content_type . ';base64,' . $base64_audio;
        
        wp_send_json_success(array(
            'audio_url' => $data_url,
            'content_type' => $content_type,
            'size' => strlen($body)
        ));
    }
    
    /**
     * AJAX handler to manually transcribe voicemail
     */
    public function ajax_transcribe_voicemail() {
        check_ajax_referer('twp_ajax_nonce', 'nonce');
        
        $voicemail_id = intval($_POST['voicemail_id']);
        
        if (!$voicemail_id) {
            wp_send_json_error('Invalid voicemail ID');
        }
        
        global $wpdb;
        $table_name = $wpdb->prefix . 'twp_voicemails';
        
        $voicemail = $wpdb->get_row($wpdb->prepare(
            "SELECT * FROM $table_name WHERE id = %d",
            $voicemail_id
        ));
        
        if (!$voicemail) {
            wp_send_json_error('Voicemail not found');
        }
        
        // For now, we'll use a placeholder transcription since we'd need a speech-to-text service
        // In a real implementation, you'd send the recording URL to a transcription service
        $placeholder_transcription = "This is a placeholder transcription. In a production environment, this would be generated using a speech-to-text service like Google Cloud Speech-to-Text, Amazon Transcribe, or Twilio's built-in transcription service.";
        
        $result = $wpdb->update(
            $table_name,
            array('transcription' => $placeholder_transcription),
            array('id' => $voicemail_id),
            array('%s'),
            array('%d')
        );
        
        if ($result !== false) {
            wp_send_json_success(array('transcription' => $placeholder_transcription));
        } else {
            wp_send_json_error('Error generating transcription');
        }
    }
    
    /**
     * AJAX handler for getting all groups
     */
    public function ajax_get_all_groups() {
        check_ajax_referer('twp_ajax_nonce', 'nonce');
        
        if (!current_user_can('manage_options')) {
            wp_die('Unauthorized');
        }
        
        $groups = TWP_Agent_Groups::get_all_groups();
        wp_send_json_success($groups);
    }
    
    /**
     * AJAX handler for getting a group
     */
    public function ajax_get_group() {
        check_ajax_referer('twp_ajax_nonce', 'nonce');
        
        if (!current_user_can('manage_options')) {
            wp_die('Unauthorized');
        }
        
        $group_id = intval($_POST['group_id']);
        $group = TWP_Agent_Groups::get_group($group_id);
        
        wp_send_json_success($group);
    }
    
    /**
     * AJAX handler for saving a group
     */
    public function ajax_save_group() {
        check_ajax_referer('twp_ajax_nonce', 'nonce');
        
        if (!current_user_can('manage_options')) {
            wp_die('Unauthorized');
        }
        
        $group_id = isset($_POST['group_id']) ? intval($_POST['group_id']) : 0;
        
        $data = array(
            'group_name' => sanitize_text_field($_POST['group_name']),
            'description' => sanitize_textarea_field($_POST['description']),
            'ring_strategy' => sanitize_text_field($_POST['ring_strategy'] ?? 'simultaneous'),
            'timeout_seconds' => intval($_POST['timeout_seconds'] ?? 30)
        );
        
        if ($group_id) {
            $result = TWP_Agent_Groups::update_group($group_id, $data);
        } else {
            $result = TWP_Agent_Groups::create_group($data);
        }
        
        wp_send_json_success(array('success' => $result !== false, 'group_id' => $result));
    }
    
    /**
     * AJAX handler for deleting a group
     */
    public function ajax_delete_group() {
        check_ajax_referer('twp_ajax_nonce', 'nonce');
        
        if (!current_user_can('manage_options')) {
            wp_die('Unauthorized');
        }
        
        $group_id = intval($_POST['group_id']);
        $result = TWP_Agent_Groups::delete_group($group_id);
        
        wp_send_json_success(array('success' => $result));
    }
    
    /**
     * AJAX handler for getting group members
     */
    public function ajax_get_group_members() {
        check_ajax_referer('twp_ajax_nonce', 'nonce');
        
        if (!current_user_can('manage_options')) {
            wp_die('Unauthorized');
        }
        
        $group_id = intval($_POST['group_id']);
        $members = TWP_Agent_Groups::get_group_members($group_id);
        
        wp_send_json_success($members);
    }
    
    /**
     * AJAX handler for adding a group member
     */
    public function ajax_add_group_member() {
        check_ajax_referer('twp_ajax_nonce', 'nonce');
        
        if (!current_user_can('manage_options')) {
            wp_die('Unauthorized');
        }
        
        $group_id = intval($_POST['group_id']);
        $user_id = intval($_POST['user_id']);
        $priority = intval($_POST['priority'] ?? 0);
        
        $result = TWP_Agent_Groups::add_member($group_id, $user_id, $priority);
        
        wp_send_json_success(array('success' => $result));
    }
    
    /**
     * AJAX handler for removing a group member
     */
    public function ajax_remove_group_member() {
        check_ajax_referer('twp_ajax_nonce', 'nonce');
        
        if (!current_user_can('manage_options')) {
            wp_die('Unauthorized');
        }
        
        $group_id = intval($_POST['group_id']);
        $user_id = intval($_POST['user_id']);
        
        $result = TWP_Agent_Groups::remove_member($group_id, $user_id);
        
        wp_send_json_success(array('success' => $result));
    }
    
    /**
     * AJAX handler for accepting a call
     */
    public function ajax_accept_call() {
        check_ajax_referer('twp_ajax_nonce', 'nonce');
        
        $call_id = intval($_POST['call_id']);
        $user_id = get_current_user_id();
        
        $result = TWP_Agent_Manager::accept_queued_call($call_id, $user_id);
        
        if ($result['success']) {
            wp_send_json_success($result);
        } else {
            wp_send_json_error($result['error']);
        }
    }
    
    /**
     * AJAX handler for accepting next call from a queue
     */
    public function ajax_accept_next_queue_call() {
        check_ajax_referer('twp_ajax_nonce', 'nonce');
        
        $queue_id = intval($_POST['queue_id']);
        $user_id = get_current_user_id();
        
        global $wpdb;
        $calls_table = $wpdb->prefix . 'twp_queued_calls';
        $groups_table = $wpdb->prefix . 'twp_group_members';
        $queues_table = $wpdb->prefix . 'twp_call_queues';
        
        // Verify user is a member of this queue's agent group
        $is_member = $wpdb->get_var($wpdb->prepare("
            SELECT COUNT(*)
            FROM $groups_table gm
            JOIN $queues_table q ON gm.group_id = q.agent_group_id
            WHERE gm.user_id = %d AND q.id = %d
        ", $user_id, $queue_id));
        
        if (!$is_member) {
            wp_send_json_error('You are not authorized to accept calls from this queue');
            return;
        }
        
        // Get the next waiting call from this queue (lowest position number)
        $next_call = $wpdb->get_row($wpdb->prepare("
            SELECT * FROM $calls_table 
            WHERE queue_id = %d AND status = 'waiting'
            ORDER BY position ASC
            LIMIT 1
        ", $queue_id));
        
        if (!$next_call) {
            wp_send_json_error('No calls waiting in this queue');
            return;
        }
        
        $result = TWP_Agent_Manager::accept_queued_call($next_call->id, $user_id);
        
        if ($result['success']) {
            wp_send_json_success($result);
        } else {
            wp_send_json_error($result['error']);
        }
    }
    
    /**
     * AJAX handler for getting waiting calls
     */
    public function ajax_get_waiting_calls() {
        check_ajax_referer('twp_ajax_nonce', 'nonce');
        
        global $wpdb;
        $calls_table = $wpdb->prefix . 'twp_queued_calls';
        $queues_table = $wpdb->prefix . 'twp_call_queues';
        $groups_table = $wpdb->prefix . 'twp_group_members';
        
        $user_id = get_current_user_id();
        
        // Get waiting calls only from queues the user is a member of
        $waiting_calls = $wpdb->get_results($wpdb->prepare("
            SELECT 
                c.*,
                q.queue_name,
                TIMESTAMPDIFF(SECOND, c.joined_at, NOW()) as wait_seconds
            FROM $calls_table c
            JOIN $queues_table q ON c.queue_id = q.id
            JOIN $groups_table gm ON gm.group_id = q.agent_group_id
            WHERE c.status = 'waiting' AND gm.user_id = %d
            ORDER BY c.position ASC
        ", $user_id));
        
        wp_send_json_success($waiting_calls);
    }
    
    /**
     * AJAX handler for setting agent status
     */
    public function ajax_set_agent_status() {
        check_ajax_referer('twp_ajax_nonce', 'nonce');
        
        $user_id = get_current_user_id();
        $status = sanitize_text_field($_POST['status']);
        
        $result = TWP_Agent_Manager::set_agent_status($user_id, $status);
        
        wp_send_json_success(array('success' => $result));
    }
    
    /**
     * AJAX handler for getting call details
     */
    public function ajax_get_call_details() {
        check_ajax_referer('twp_ajax_nonce', 'nonce');
        
        if (!isset($_POST['call_sid'])) {
            wp_send_json_error('Call SID is required');
        }
        
        $call_sid = sanitize_text_field($_POST['call_sid']);
        
        global $wpdb;
        $table_name = $wpdb->prefix . 'twp_call_log';
        
        $call = $wpdb->get_row($wpdb->prepare(
            "SELECT * FROM $table_name WHERE call_sid = %s",
            $call_sid
        ));
        
        if ($call) {
            // Parse actions_taken if it's JSON
            if ($call->actions_taken && is_string($call->actions_taken)) {
                $decoded = json_decode($call->actions_taken, true);
                if ($decoded) {
                    $call->actions_taken = json_encode($decoded, JSON_PRETTY_PRINT);
                }
            }
            
            wp_send_json_success($call);
        } else {
            wp_send_json_error('Call not found');
        }
    }
    
    /**
     * AJAX handler for requesting callback
     */
    public function ajax_request_callback() {
        check_ajax_referer('twp_ajax_nonce', 'nonce');
        
        $phone_number = sanitize_text_field($_POST['phone_number']);
        $queue_id = isset($_POST['queue_id']) ? intval($_POST['queue_id']) : null;
        $call_sid = isset($_POST['call_sid']) ? sanitize_text_field($_POST['call_sid']) : null;
        
        if (empty($phone_number)) {
            wp_send_json_error(array('message' => 'Phone number is required'));
        }
        
        $callback_id = TWP_Callback_Manager::request_callback($phone_number, $queue_id, $call_sid);
        
        if ($callback_id) {
            wp_send_json_success(array(
                'callback_id' => $callback_id,
                'message' => 'Callback requested successfully'
            ));
        } else {
            wp_send_json_error(array('message' => 'Failed to request callback'));
        }
    }
    
    /**
     * AJAX handler for initiating outbound calls
     */
    public function ajax_initiate_outbound_call() {
        check_ajax_referer('twp_ajax_nonce', 'nonce');
        
        $to_number = sanitize_text_field($_POST['to_number']);
        $agent_user_id = get_current_user_id();
        
        if (empty($to_number)) {
            wp_send_json_error(array('message' => 'Phone number is required'));
        }
        
        $result = TWP_Callback_Manager::initiate_outbound_call($to_number, $agent_user_id);
        
        if ($result['success']) {
            wp_send_json_success(array(
                'call_sid' => $result['call_sid'],
                'message' => 'Outbound call initiated successfully'
            ));
        } else {
            wp_send_json_error(array('message' => $result['error']));
        }
    }
    
    /**
     * AJAX handler for getting pending callbacks
     */
    public function ajax_get_callbacks() {
        check_ajax_referer('twp_ajax_nonce', 'nonce');
        
        $pending_callbacks = TWP_Callback_Manager::get_pending_callbacks();
        $callback_stats = TWP_Callback_Manager::get_callback_stats();
        
        wp_send_json_success(array(
            'callbacks' => $pending_callbacks,
            'stats' => $callback_stats
        ));
    }
    
    /**
     * AJAX handler for updating phone numbers with status callbacks
     */
    public function ajax_update_phone_status_callbacks() {
        check_ajax_referer('twp_nonce', 'nonce');
        
        if (!current_user_can('manage_options')) {
            wp_send_json_error('Insufficient permissions');
        }
        
        try {
            $twilio = new TWP_Twilio_API();
            $result = $twilio->enable_status_callbacks_for_all_numbers();
            
            if ($result['success']) {
                wp_send_json_success($result['data']);
            } else {
                wp_send_json_error($result['error']);
            }
        } catch (Exception $e) {
            wp_send_json_error('Failed to update phone numbers: ' . $e->getMessage());
        }
    }
    
    /**
     * AJAX handler for toggling individual phone number status callbacks
     */
    public function ajax_toggle_number_status_callback() {
        check_ajax_referer('twp_nonce', 'nonce');
        
        if (!current_user_can('manage_options')) {
            wp_send_json_error('Insufficient permissions');
        }
        
        $sid = isset($_POST['sid']) ? sanitize_text_field($_POST['sid']) : '';
        $enable = isset($_POST['enable']) ? $_POST['enable'] === 'true' : false;
        
        if (empty($sid)) {
            wp_send_json_error('Phone number SID is required');
        }
        
        try {
            $twilio = new TWP_Twilio_API();
            $result = $twilio->toggle_number_status_callback($sid, $enable);
            
            if ($result['success']) {
                wp_send_json_success($result['data']);
            } else {
                wp_send_json_error($result['error']);
            }
        } catch (Exception $e) {
            wp_send_json_error('Failed to update phone number: ' . $e->getMessage());
        }
    }
    
    /**
     * AJAX handler for generating capability tokens for Browser Phone
     */
    public function ajax_generate_capability_token() {
        check_ajax_referer('twp_ajax_nonce', 'nonce');
        
        if (!current_user_can('manage_options') && !current_user_can('twp_access_browser_phone')) {
            wp_send_json_error('Insufficient permissions');
        }
        
        try {
            $twilio = new TWP_Twilio_API();
            $result = $twilio->generate_capability_token();
            
            if ($result['success']) {
                wp_send_json_success($result['data']);
            } else {
                wp_send_json_error($result['error']);
            }
        } catch (Exception $e) {
            wp_send_json_error('Failed to generate capability token: ' . $e->getMessage());
        }
    }
    
    /**
     * AJAX handler for saving user's call mode preference
     */
    public function ajax_save_call_mode() {
        check_ajax_referer('twp_ajax_nonce', 'nonce');
        
        if (!current_user_can('read')) {
            wp_send_json_error('Insufficient permissions');
        }
        
        $mode = isset($_POST['mode']) ? sanitize_text_field($_POST['mode']) : '';
        
        if (!in_array($mode, ['browser', 'cell'])) {
            wp_send_json_error('Invalid mode');
        }
        
        $user_id = get_current_user_id();
        $updated = update_user_meta($user_id, 'twp_call_mode', $mode);
        
        if ($updated !== false) {
            wp_send_json_success([
                'mode' => $mode,
                'message' => 'Call mode updated successfully'
            ]);
        } else {
            wp_send_json_error('Failed to update call mode');
        }
    }
    
    /**
     * AJAX handler for auto-configuring TwiML App for browser phone
     */
    public function ajax_auto_configure_twiml_app() {
        check_ajax_referer('twp_ajax_nonce', 'nonce');
        
        if (!current_user_can('manage_options')) {
            wp_send_json_error('Insufficient permissions');
        }
        
        $enable_smart_routing = isset($_POST['enable_smart_routing']) && $_POST['enable_smart_routing'] === 'true';
        $selected_numbers = isset($_POST['selected_numbers']) ? json_decode(stripslashes($_POST['selected_numbers']), true) : [];
        
        try {
            $result = $this->auto_configure_browser_phone($enable_smart_routing, $selected_numbers);
            
            if ($result['success']) {
                wp_send_json_success($result['data']);
            } else {
                wp_send_json_error($result['error']);
            }
        } catch (Exception $e) {
            wp_send_json_error('Failed to auto-configure: ' . $e->getMessage());
        }
    }
    
    /**
     * Auto-configure browser phone by creating TwiML App and setting up webhooks
     */
    private function auto_configure_browser_phone($enable_smart_routing = true, $selected_numbers = []) {
        $twilio = new TWP_Twilio_API();
        $client = $twilio->get_client();
        
        if (!$client) {
            return [
                'success' => false,
                'error' => 'Twilio client not initialized. Please check your credentials.'
            ];
        }
        
        $steps_completed = [];
        $warnings = [];
        
        try {
            // Step 1: Check if TwiML App already exists
            $current_app_sid = get_option('twp_twiml_app_sid');
            $app_sid = null;
            
            if ($current_app_sid) {
                // Try to fetch existing app to verify it exists
                try {
                    $existing_app = $client->applications($current_app_sid)->fetch();
                    $app_sid = $existing_app->sid;
                    $steps_completed[] = 'Found existing TwiML App: ' . $existing_app->friendlyName;
                } catch (Exception $e) {
                    $warnings[] = 'Existing TwiML App SID is invalid, creating new one';
                    $current_app_sid = null;
                }
            }
            
            // Step 2: Create TwiML App if needed
            if (!$app_sid) {
                $voice_url = home_url('/wp-json/twilio-webhook/v1/browser-voice');
                $fallback_url = home_url('/wp-json/twilio-webhook/v1/browser-fallback');
                
                $app = $client->applications->create([
                    'friendlyName' => 'Browser Phone App - ' . get_bloginfo('name'),
                    'voiceUrl' => $voice_url,
                    'voiceMethod' => 'POST',
                    'voiceFallbackUrl' => $fallback_url,
                    'voiceFallbackMethod' => 'POST'
                ]);
                
                $app_sid = $app->sid;
                $steps_completed[] = 'Created new TwiML App: ' . $app->friendlyName;
            }
            
            // Step 3: Save TwiML App SID to WordPress
            update_option('twp_twiml_app_sid', $app_sid);
            $steps_completed[] = 'Saved TwiML App SID to WordPress settings';
            
            // Step 4: Test capability token generation
            $token_result = $twilio->generate_capability_token();
            if ($token_result['success']) {
                $steps_completed[] = 'Successfully generated test capability token';
            } else {
                $warnings[] = 'Capability token generation failed: ' . $token_result['error'];
            }
            
            // Step 5: Update phone numbers with appropriate webhook URLs
            $phone_result = $this->auto_configure_phone_numbers_for_browser($enable_smart_routing, $selected_numbers);
            if ($phone_result['updated_count'] > 0) {
                $webhook_type = $enable_smart_routing ? 'smart routing' : 'browser voice';
                $steps_completed[] = 'Updated ' . $phone_result['updated_count'] . ' phone numbers with ' . $webhook_type . ' webhooks';
            }
            if ($phone_result['skipped_count'] > 0) {
                $steps_completed[] = 'Skipped ' . $phone_result['skipped_count'] . ' phone numbers (not selected)';
            }
            if (!empty($phone_result['warnings'])) {
                $warnings = array_merge($warnings, $phone_result['warnings']);
            }
            
            return [
                'success' => true,
                'data' => [
                    'app_sid' => $app_sid,
                    'steps_completed' => $steps_completed,
                    'warnings' => $warnings,
                    'voice_url' => home_url('/wp-json/twilio-webhook/v1/browser-voice'),
                    'message' => 'Browser phone auto-configuration completed successfully!'
                ]
            ];
            
        } catch (Exception $e) {
            return [
                'success' => false,
                'error' => 'Auto-configuration failed: ' . $e->getMessage()
            ];
        }
    }
    
    /**
     * Auto-configure phone numbers with browser webhooks (optional)
     */
    private function auto_configure_phone_numbers_for_browser($enable_smart_routing = true, $selected_numbers = []) {
        $twilio = new TWP_Twilio_API();
        $phone_numbers = $twilio->get_phone_numbers();
        
        $updated_count = 0;
        $skipped_count = 0;
        $warnings = [];
        
        if (!$phone_numbers['success']) {
            return [
                'updated_count' => 0,
                'skipped_count' => 0,
                'warnings' => ['Could not retrieve phone numbers: ' . $phone_numbers['error']]
            ];
        }
        
        // Create a map of selected number SIDs for quick lookup
        $selected_sids = [];
        if (!empty($selected_numbers)) {
            foreach ($selected_numbers as $selected) {
                $selected_sids[$selected['sid']] = true;
            }
        }
        
        $smart_routing_url = home_url('/wp-json/twilio-webhook/v1/smart-routing');
        $browser_voice_url = home_url('/wp-json/twilio-webhook/v1/browser-voice');
        $target_url = $enable_smart_routing ? $smart_routing_url : $browser_voice_url;
        
        foreach ($phone_numbers['data']['incoming_phone_numbers'] as $number) {
            // Skip if number is not selected (when selection is provided)
            if (!empty($selected_numbers) && !isset($selected_sids[$number['sid']])) {
                $skipped_count++;
                error_log('TWP: Skipping phone number ' . $number['phone_number'] . ' (not selected)');
                continue;
            }
            
            try {
                // Only update if not already using the target URL
                if ($number['voice_url'] !== $target_url) {
                    $client = $twilio->get_client();
                    $client->incomingPhoneNumbers($number['sid'])->update([
                        'voiceUrl' => $target_url,
                        'voiceMethod' => 'POST'
                    ]);
                    $updated_count++;
                    error_log('TWP: Updated phone number ' . $number['phone_number'] . ' to use ' . $target_url);
                }
            } catch (Exception $e) {
                $warnings[] = 'Failed to update ' . $number['phone_number'] . ': ' . $e->getMessage();
            }
        }
        
        return [
            'updated_count' => $updated_count,
            'skipped_count' => $skipped_count,
            'warnings' => $warnings
        ];
    }
    
    /**
     * AJAX handler for configuring phone numbers only
     */
    public function ajax_configure_phone_numbers_only() {
        check_ajax_referer('twp_ajax_nonce', 'nonce');
        
        if (!current_user_can('manage_options')) {
            wp_send_json_error('Insufficient permissions');
        }
        
        $enable_smart_routing = isset($_POST['enable_smart_routing']) && $_POST['enable_smart_routing'] === 'true';
        $selected_numbers = isset($_POST['selected_numbers']) ? json_decode(stripslashes($_POST['selected_numbers']), true) : [];
        
        try {
            $result = $this->configure_phone_numbers_only($enable_smart_routing, $selected_numbers);
            
            if ($result['success']) {
                wp_send_json_success($result['data']);
            } else {
                wp_send_json_error($result['error']);
            }
        } catch (Exception $e) {
            wp_send_json_error('Failed to configure phone numbers: ' . $e->getMessage());
        }
    }
    
    /**
     * Configure phone numbers only (no TwiML App creation)
     */
    private function configure_phone_numbers_only($enable_smart_routing = true, $selected_numbers = []) {
        $twilio = new TWP_Twilio_API();
        $client = $twilio->get_client();
        
        if (!$client) {
            return [
                'success' => false,
                'error' => 'Twilio client not initialized. Please check your credentials.'
            ];
        }
        
        $steps_completed = [];
        $warnings = [];
        
        try {
            // Configure phone numbers
            $phone_result = $this->auto_configure_phone_numbers_for_browser($enable_smart_routing, $selected_numbers);
            
            if ($phone_result['updated_count'] > 0) {
                $webhook_type = $enable_smart_routing ? 'smart routing' : 'browser voice';
                $steps_completed[] = 'Updated ' . $phone_result['updated_count'] . ' phone numbers with ' . $webhook_type . ' webhooks';
            } else {
                $steps_completed[] = 'All selected phone numbers already configured correctly';
            }
            
            if ($phone_result['skipped_count'] > 0) {
                $steps_completed[] = 'Skipped ' . $phone_result['skipped_count'] . ' phone numbers (not selected)';
            }
            
            if (!empty($phone_result['warnings'])) {
                $warnings = array_merge($warnings, $phone_result['warnings']);
            }
            
            // If smart routing is enabled, verify TwiML App exists
            if ($enable_smart_routing) {
                $app_sid = get_option('twp_twiml_app_sid');
                if (empty($app_sid)) {
                    $warnings[] = 'Smart routing enabled but no TwiML App SID configured. You may need to run full auto-configuration.';
                } else {
                    // Test if the app exists
                    try {
                        $client->applications($app_sid)->fetch();
                        $steps_completed[] = 'Verified TwiML App exists for smart routing';
                    } catch (Exception $e) {
                        $warnings[] = 'TwiML App SID is invalid. Smart routing may not work properly.';
                    }
                }
            }
            
            $webhook_url = $enable_smart_routing ? 
                home_url('/wp-json/twilio-webhook/v1/smart-routing') : 
                home_url('/wp-json/twilio-webhook/v1/browser-voice');
            
            return [
                'success' => true,
                'data' => [
                    'steps_completed' => $steps_completed,
                    'warnings' => $warnings,
                    'webhook_url' => $webhook_url,
                    'routing_type' => $enable_smart_routing ? 'Smart Routing' : 'Direct Browser',
                    'message' => 'Phone number configuration completed successfully!'
                ]
            ];
            
        } catch (Exception $e) {
            return [
                'success' => false,
                'error' => 'Phone number configuration failed: ' . $e->getMessage()
            ];
        }
    }
    
    /**
     * AJAX handler for initiating outbound calls with from number
     */
    public function ajax_initiate_outbound_call_with_from() {
        check_ajax_referer('twp_ajax_nonce', 'nonce');
        
        $from_number = sanitize_text_field($_POST['from_number']);
        $to_number = sanitize_text_field($_POST['to_number']);
        $agent_phone = sanitize_text_field($_POST['agent_phone']);
        
        if (empty($from_number) || empty($to_number) || empty($agent_phone)) {
            wp_send_json_error(array('message' => 'All fields are required'));
        }
        
        // Validate phone numbers
        if (!preg_match('/^\+?[1-9]\d{1,14}$/', str_replace([' ', '-', '(', ')'], '', $to_number))) {
            wp_send_json_error(array('message' => 'Invalid destination phone number format'));
        }
        
        if (!preg_match('/^\+?[1-9]\d{1,14}$/', str_replace([' ', '-', '(', ')'], '', $agent_phone))) {
            wp_send_json_error(array('message' => 'Invalid agent phone number format'));
        }
        
        $result = $this->initiate_outbound_call_with_from($from_number, $to_number, $agent_phone);
        
        if ($result['success']) {
            wp_send_json_success(array(
                'call_sid' => $result['call_sid'],
                'message' => 'Outbound call initiated successfully'
            ));
        } else {
            wp_send_json_error(array('message' => $result['error']));
        }
    }
    
    /**
     * Initiate outbound call with specific from number
     */
    private function initiate_outbound_call_with_from($from_number, $to_number, $agent_phone) {
        $twilio = new TWP_Twilio_API();
        
        // Build webhook URL with parameters
        $webhook_url = home_url('/wp-json/twilio-webhook/v1/outbound-agent-with-from') . '?' . http_build_query(array(
            'target_number' => $to_number,
            'agent_user_id' => get_current_user_id(),
            'from_number' => $from_number
        ));
        
        // First call the agent
        $agent_call_result = $twilio->make_call(
            $agent_phone,
            $webhook_url,
            null, // No status callback needed for this
            $from_number // Use specified from number
        );
        
        if ($agent_call_result['success']) {
            $call_sid = isset($agent_call_result['data']['sid']) ? $agent_call_result['data']['sid'] : null;
            
            // Set agent to busy
            TWP_Agent_Manager::set_agent_status(get_current_user_id(), 'busy', $call_sid);
            
            // Log the outbound call
            TWP_Call_Logger::log_call(array(
                'call_sid' => $call_sid,
                'from_number' => $from_number,
                'to_number' => $to_number,
                'status' => 'outbound_initiated',
                'workflow_name' => 'Outbound Call',
                'actions_taken' => json_encode(array(
                    'agent_id' => get_current_user_id(),
                    'agent_name' => wp_get_current_user()->display_name,
                    'type' => 'click_to_call_with_from',
                    'agent_phone' => $agent_phone
                ))
            ));
            
            return array('success' => true, 'call_sid' => $call_sid);
        }
        
        return array('success' => false, 'error' => $agent_call_result['error']);
    }
    
    /**
     * Display SMS Inbox page
     */
    public function display_sms_inbox_page() {
        global $wpdb;
        $table_name = $wpdb->prefix . 'twp_sms_log';
        
        // Get our Twilio numbers first
        $twilio_numbers = [];
        try {
            $twilio_api = new TWP_Twilio_API();
            $numbers_result = $twilio_api->get_phone_numbers();
            if ($numbers_result['success'] && !empty($numbers_result['data']['incoming_phone_numbers'])) {
                foreach ($numbers_result['data']['incoming_phone_numbers'] as $number) {
                    $twilio_numbers[] = $number['phone_number'];
                }
            }
        } catch (Exception $e) {
            error_log('Failed to get Twilio numbers: ' . $e->getMessage());
        }
        
        // Build the NOT IN clause for Twilio numbers
        $twilio_numbers_placeholders = !empty($twilio_numbers) ? 
            implode(',', array_fill(0, count($twilio_numbers), '%s')) : 
            "'dummy_number_that_wont_match'";
        
        // Get unique conversations (group by customer phone number)
        // Customer number is the one that's NOT in our Twilio numbers list
        $query = $wpdb->prepare(
            "SELECT 
                customer_number,
                business_number,
                MAX(last_message_time) as last_message_time,
                SUM(message_count) as message_count,
                MAX(last_message) as last_message,
                MAX(last_direction) as last_message_direction
             FROM (
                SELECT 
                    from_number as customer_number,
                    to_number as business_number,
                    MAX(received_at) as last_message_time,
                    COUNT(*) as message_count,
                    (SELECT body FROM $table_name t2 
                     WHERE t2.from_number = t1.from_number AND t2.to_number = t1.to_number
                     ORDER BY t2.received_at DESC LIMIT 1) as last_message,
                    'incoming' as last_direction
                FROM $table_name t1
                WHERE from_number NOT IN ($twilio_numbers_placeholders)
                  AND body NOT IN ('1', 'status', 'help')
                GROUP BY from_number, to_number
                
                UNION ALL
                
                SELECT 
                    to_number as customer_number,
                    from_number as business_number,
                    MAX(received_at) as last_message_time,
                    COUNT(*) as message_count,
                    (SELECT body FROM $table_name t3 
                     WHERE t3.to_number = t1.to_number AND t3.from_number = t1.from_number
                     ORDER BY t3.received_at DESC LIMIT 1) as last_message,
                    'outgoing' as last_direction
                FROM $table_name t1
                WHERE to_number NOT IN ($twilio_numbers_placeholders)
                  AND from_number IN ($twilio_numbers_placeholders)
                GROUP BY to_number, from_number
             ) as conversations
             GROUP BY customer_number
             ORDER BY last_message_time DESC
             LIMIT 50",
            ...$twilio_numbers,
            ...$twilio_numbers,
            ...$twilio_numbers
        );
        
        $conversations = $wpdb->get_results($query);
        ?>
        <div class="wrap">
            <h1>SMS Inbox</h1>
            <p>View conversations and respond to customer SMS messages. Click on a conversation to view the full thread.</p>
            
            <div class="sms-inbox-container">
                <table class="wp-list-table widefat fixed striped">
                    <thead>
                        <tr>
                            <th style="width: 180px;">Customer</th>
                            <th style="width: 180px;">Business Line</th>
                            <th style="width: 120px;">Last Message</th>
                            <th>Preview</th>
                            <th style="width: 80px;">Messages</th>
                            <th style="width: 150px;">Actions</th>
                        </tr>
                    </thead>
                    <tbody>
                        <?php if (empty($conversations)): ?>
                            <tr>
                                <td colspan="6" style="text-align: center; padding: 20px;">
                                    No customer conversations yet
                                </td>
                            </tr>
                        <?php else: ?>
                            <?php foreach ($conversations as $conversation): ?>
                                <tr data-customer="<?php echo esc_attr($conversation->customer_number); ?>" 
                                    data-business="<?php echo esc_attr($conversation->business_number); ?>">
                                    <td>
                                        <strong><?php echo esc_html($conversation->customer_number); ?></strong>
                                        <br><small style="color: #666;">Customer</small>
                                    </td>
                                    <td>
                                        <strong><?php echo esc_html($conversation->business_number); ?></strong>
                                        <br><small style="color: #666;">Received on</small>
                                    </td>
                                    <td>
                                        <?php echo esc_html(date('M j, H:i', strtotime($conversation->last_message_time))); ?>
                                        <br>
                                        <small style="color: <?php echo $conversation->last_message_direction === 'incoming' ? '#d63384' : '#0f5132'; ?>;">
                                            <?php echo $conversation->last_message_direction === 'incoming' ? '← Received' : '→ Sent'; ?>
                                        </small>
                                    </td>
                                    <td>
                                        <div style="max-width: 300px; word-wrap: break-word;">
                                            <?php 
                                            $preview = strlen($conversation->last_message) > 100 ? 
                                                substr($conversation->last_message, 0, 100) . '...' : 
                                                $conversation->last_message;
                                            echo esc_html($preview); 
                                            ?>
                                        </div>
                                    </td>
                                    <td style="text-align: center;">
                                        <span class="message-count-badge"><?php echo intval($conversation->message_count); ?></span>
                                    </td>
                                    <td>
                                        <button class="button button-small view-conversation-btn" 
                                                data-customer="<?php echo esc_attr($conversation->customer_number); ?>"
                                                data-business="<?php echo esc_attr($conversation->business_number); ?>">
                                            💬 View Thread
                                        </button>
                                        <button class="button button-small delete-conversation-btn" 
                                                data-customer="<?php echo esc_attr($conversation->customer_number); ?>"
                                                style="margin-left: 5px;">
                                            🗑️ Delete
                                        </button>
                                    </td>
                                </tr>
                            <?php endforeach; ?>
                        <?php endif; ?>
                    </tbody>
                </table>
            </div>
            
            <!-- Conversation Modal -->
            <div id="conversation-modal" style="display: none;">
                <div class="modal-backdrop" onclick="closeConversationModal()"></div>
                <div class="modal-content">
                    <div class="modal-header">
                        <h2 id="conversation-title">Conversation</h2>
                        <button type="button" class="modal-close" onclick="closeConversationModal()">×</button>
                    </div>
                    
                    <div class="conversation-messages" id="conversation-messages">
                        <div id="loading-messages">Loading conversation...</div>
                    </div>
                    
                    <div class="reply-form">
                        <div class="reply-inputs">
                            <textarea id="reply-message" placeholder="Type your message..." rows="3"></textarea>
                            <div class="reply-actions">
                                <button type="button" id="send-reply-btn" class="button button-primary">Send</button>
                                <button type="button" onclick="closeConversationModal()" class="button">Cancel</button>
                            </div>
                        </div>
                    </div>
                </div>
            </div>
            
            <style>
            .sms-inbox-container {
                margin-top: 20px;
            }
            
            .message-count-badge {
                background: #0073aa;
                color: white;
                padding: 4px 8px;
                border-radius: 12px;
                font-size: 11px;
                font-weight: bold;
            }
            
            #conversation-modal {
                position: fixed;
                top: 0;
                left: 0;
                right: 0;
                bottom: 0;
                z-index: 100000;
            }
            
            #conversation-modal .modal-backdrop {
                position: absolute;
                top: 0;
                left: 0;
                right: 0;
                bottom: 0;
                background: rgba(0, 0, 0, 0.5);
            }
            
            #conversation-modal .modal-content {
                position: absolute;
                top: 50%;
                left: 50%;
                transform: translate(-50%, -50%);
                background: white;
                border-radius: 8px;
                box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
                max-width: 600px;
                width: 90%;
                max-height: 80vh;
                display: flex;
                flex-direction: column;
            }
            
            .modal-header {
                padding: 20px;
                border-bottom: 1px solid #ddd;
                display: flex;
                justify-content: space-between;
                align-items: center;
            }
            
            .modal-header h2 {
                margin: 0;
                font-size: 18px;
            }
            
            .modal-close {
                background: none;
                border: none;
                font-size: 24px;
                cursor: pointer;
                color: #666;
                padding: 0;
                width: 30px;
                height: 30px;
                display: flex;
                align-items: center;
                justify-content: center;
            }
            
            .conversation-messages {
                flex: 1;
                overflow-y: auto;
                padding: 20px;
                min-height: 300px;
                max-height: 400px;
            }
            
            .message {
                margin-bottom: 15px;
                display: flex;
                align-items: flex-start;
            }
            
            .message.incoming {
                justify-content: flex-start;
            }
            
            .message.outgoing {
                justify-content: flex-end;
            }
            
            .message-bubble {
                max-width: 70%;
                padding: 10px 15px;
                border-radius: 18px;
                word-wrap: break-word;
            }
            
            .message.incoming .message-bubble {
                background: #f1f1f1;
                color: #333;
            }
            
            .message.outgoing .message-bubble {
                background: #0073aa;
                color: white;
            }
            
            .message-time {
                font-size: 11px;
                color: #666;
                margin-top: 5px;
                display: block;
            }
            
            .message.incoming .message-time {
                text-align: left;
            }
            
            .message.outgoing .message-time {
                text-align: right;
                color: rgba(255,255,255,0.8);
            }
            
            .reply-form {
                padding: 20px;
                border-top: 1px solid #ddd;
                background: #f9f9f9;
            }
            
            .reply-inputs textarea {
                width: 100%;
                resize: vertical;
                border: 1px solid #ddd;
                border-radius: 4px;
                padding: 10px;
                margin-bottom: 10px;
            }
            
            .reply-actions {
                text-align: right;
            }
            
            .reply-actions .button {
                margin-left: 10px;
            }
            
            #loading-messages {
                text-align: center;
                color: #666;
                padding: 40px;
            }
            </style>
            
            <script>
            jQuery(document).ready(function($) {
                var currentCustomerPhone = '';
                var currentBusinessPhone = '';
                
                // View conversation
                $('.view-conversation-btn').on('click', function() {
                    currentCustomerPhone = $(this).data('customer');
                    currentBusinessPhone = $(this).data('business');
                    loadConversation(currentCustomerPhone, currentBusinessPhone);
                });
                
                // Delete conversation
                $('.delete-conversation-btn').on('click', function() {
                    var customerPhone = $(this).data('customer');
                    if (confirm('Are you sure you want to delete all messages from ' + customerPhone + '?')) {
                        deleteConversation(customerPhone);
                    }
                });
                
                // Send reply
                $('#send-reply-btn').on('click', function() {
                    var message = $('#reply-message').val().trim();
                    if (message && currentCustomerPhone && currentBusinessPhone) {
                        sendReply(currentCustomerPhone, currentBusinessPhone, message);
                    } else {
                        alert('Please enter a message');
                    }
                });
                
                // Enter key to send
                $('#reply-message').on('keydown', function(e) {
                    if (e.key === 'Enter' && !e.shiftKey) {
                        e.preventDefault();
                        $('#send-reply-btn').click();
                    }
                });
                
                function loadConversation(customerPhone, businessPhone) {
                    $('#conversation-title').html('Conversation: ' + customerPhone + '<br><small style="font-weight: normal;">via ' + businessPhone + '</small>');
                    $('#conversation-messages').html('<div id="loading-messages">Loading conversation...</div>');
                    $('#conversation-modal').show();
                    
                    $.ajax({
                        url: ajaxurl,
                        type: 'POST',
                        data: {
                            action: 'twp_get_conversation',
                            phone_number: customerPhone,
                            nonce: '<?php echo wp_create_nonce('twp_ajax_nonce'); ?>'
                        },
                        success: function(response) {
                            if (response.success) {
                                displayConversation(response.data.messages, customerPhone);
                            } else {
                                $('#conversation-messages').html('<div style="text-align: center; color: #d63384; padding: 40px;">Error: ' + response.data + '</div>');
                            }
                        },
                        error: function() {
                            $('#conversation-messages').html('<div style="text-align: center; color: #d63384; padding: 40px;">Failed to load conversation</div>');
                        }
                    });
                }
                
                function displayConversation(messages, customerPhone) {
                    var html = '';
                    messages.forEach(function(message) {
                        // Determine direction based on whether from_number is the customer
                        var messageClass = (message.from_number === customerPhone) ? 'incoming' : 'outgoing';
                        var messageTime = new Date(message.received_at).toLocaleString();
                        
                        html += '<div class="message ' + messageClass + '">';
                        html += '<div class="message-bubble">';
                        html += '<div>' + escapeHtml(message.body) + '</div>';
                        html += '<small class="message-time">' + messageTime;
                        if (messageClass === 'incoming') {
                            html += ' • From: ' + message.from_number + ' → ' + message.to_number;
                        } else {
                            html += ' • Sent: ' + message.from_number + ' → ' + message.to_number;
                        }
                        html += '</small>';
                        html += '</div>';
                        html += '</div>';
                    });
                    
                    if (html === '') {
                        html = '<div style="text-align: center; color: #666; padding: 40px;">No messages found</div>';
                    }
                    
                    $('#conversation-messages').html(html);
                    
                    // Scroll to bottom
                    var messagesContainer = document.getElementById('conversation-messages');
                    messagesContainer.scrollTop = messagesContainer.scrollHeight;
                }
                
                function sendReply(toNumber, fromNumber, message) {
                    var $button = $('#send-reply-btn');
                    $button.prop('disabled', true).text('Sending...');
                    
                    $.ajax({
                        url: ajaxurl,
                        type: 'POST',
                        data: {
                            action: 'twp_send_sms_reply',
                            to_number: toNumber,
                            from_number: fromNumber,
                            message: message,
                            nonce: '<?php echo wp_create_nonce('twp_ajax_nonce'); ?>'
                        },
                        success: function(response) {
                            $button.prop('disabled', false).text('Send');
                            
                            if (response.success) {
                                $('#reply-message').val('');
                                // Reload conversation to show the new message
                                loadConversation(currentCustomerPhone, currentBusinessPhone);
                            } else {
                                alert('Failed to send message: ' + response.data);
                            }
                        },
                        error: function() {
                            $button.prop('disabled', false).text('Send');
                            alert('Failed to send message. Please try again.');
                        }
                    });
                }
                
                function deleteConversation(phoneNumber) {
                    $.ajax({
                        url: ajaxurl,
                        type: 'POST',
                        data: {
                            action: 'twp_delete_conversation',
                            phone_number: phoneNumber,
                            nonce: '<?php echo wp_create_nonce('twp_ajax_nonce'); ?>'
                        },
                        success: function(response) {
                            if (response.success) {
                                // Remove the conversation row from the table
                                $('tr[data-customer="' + phoneNumber + '"]').fadeOut(function() {
                                    $(this).remove();
                                    
                                    // Check if table is now empty
                                    if ($('.sms-inbox-container tbody tr').length === 0) {
                                        $('.sms-inbox-container tbody').html(
                                            '<tr><td colspan="6" style="text-align: center; padding: 20px;">No customer conversations yet</td></tr>'
                                        );
                                    }
                                });
                                
                                // Close modal if it's open for this conversation
                                if (currentCustomerPhone === phoneNumber) {
                                    closeConversationModal();
                                }
                                
                                // Show success message
                                var deletedCount = response.data.deleted_count || 0;
                                alert('Conversation deleted successfully! (' + deletedCount + ' messages removed)');
                            } else {
                                alert('Failed to delete conversation: ' + response.data);
                            }
                        },
                        error: function() {
                            alert('Failed to delete conversation. Please try again.');
                        }
                    });
                }
                
                function escapeHtml(text) {
                    var div = document.createElement('div');
                    div.textContent = text;
                    return div.innerHTML;
                }
            });
            
            function closeConversationModal() {
                document.getElementById('conversation-modal').style.display = 'none';
            }
            </script>
        </div>
        <?php
    }
    
    /**
     * AJAX handler for deleting SMS messages
     */
    public function ajax_delete_sms() {
        check_ajax_referer('twp_ajax_nonce', 'nonce');
        
        if (!current_user_can('manage_options')) {
            wp_send_json_error('Insufficient permissions');
        }
        
        $message_id = isset($_POST['message_id']) ? intval($_POST['message_id']) : 0;
        
        if (empty($message_id)) {
            wp_send_json_error('Message ID is required');
        }
        
        global $wpdb;
        $table_name = $wpdb->prefix . 'twp_sms_log';
        
        $deleted = $wpdb->delete(
            $table_name,
            array('id' => $message_id),
            array('%d')
        );
        
        if ($deleted) {
            wp_send_json_success('Message deleted successfully');
        } else {
            wp_send_json_error('Failed to delete message');
        }
    }
    
    /**
     * AJAX handler for deleting entire SMS conversations
     */
    public function ajax_delete_conversation() {
        check_ajax_referer('twp_ajax_nonce', 'nonce');
        
        if (!current_user_can('manage_options')) {
            wp_send_json_error('Insufficient permissions');
        }
        
        $phone_number = isset($_POST['phone_number']) ? sanitize_text_field($_POST['phone_number']) : '';
        
        if (empty($phone_number)) {
            wp_send_json_error('Phone number is required');
        }
        
        global $wpdb;
        $table_name = $wpdb->prefix . 'twp_sms_log';
        
        // Delete all messages involving this phone number
        $deleted = $wpdb->query($wpdb->prepare(
            "DELETE FROM $table_name WHERE from_number = %s OR to_number = %s",
            $phone_number, $phone_number
        ));
        
        if ($deleted !== false) {
            wp_send_json_success([
                'message' => 'Conversation deleted successfully',
                'deleted_count' => $deleted
            ]);
        } else {
            wp_send_json_error('Failed to delete conversation');
        }
    }
    
    /**
     * AJAX handler for getting conversation history
     */
    public function ajax_get_conversation() {
        check_ajax_referer('twp_ajax_nonce', 'nonce');
        
        if (!current_user_can('manage_options')) {
            wp_send_json_error('Insufficient permissions');
        }
        
        $phone_number = isset($_POST['phone_number']) ? sanitize_text_field($_POST['phone_number']) : '';
        
        if (empty($phone_number)) {
            wp_send_json_error('Phone number is required');
        }
        
        global $wpdb;
        $table_name = $wpdb->prefix . 'twp_sms_log';
        
        // Get all messages involving this phone number (both incoming and outgoing)
        $messages = $wpdb->get_results($wpdb->prepare(
            "SELECT *, 
             CASE 
                WHEN from_number = %s THEN 'incoming'
                ELSE 'outgoing'
             END as direction
             FROM $table_name 
             WHERE from_number = %s OR to_number = %s
             ORDER BY received_at ASC",
            $phone_number, $phone_number, $phone_number
        ));
        
        wp_send_json_success([
            'messages' => $messages,
            'phone_number' => $phone_number
        ]);
    }
    
    /**
     * AJAX handler for sending SMS replies
     */
    public function ajax_send_sms_reply() {
        check_ajax_referer('twp_ajax_nonce', 'nonce');
        
        if (!current_user_can('manage_options')) {
            wp_send_json_error('Insufficient permissions');
        }
        
        $to_number = isset($_POST['to_number']) ? sanitize_text_field($_POST['to_number']) : '';
        $from_number = isset($_POST['from_number']) ? sanitize_text_field($_POST['from_number']) : '';
        $message = isset($_POST['message']) ? sanitize_textarea_field($_POST['message']) : '';
        
        if (empty($to_number) || empty($message)) {
            wp_send_json_error('Phone number and message are required');
        }
        
        $twilio = new TWP_Twilio_API();
        $result = $twilio->send_sms($to_number, $message, $from_number);
        
        if ($result['success']) {
            // Log the outgoing message to the database
            global $wpdb;
            $table_name = $wpdb->prefix . 'twp_sms_log';
            
            $wpdb->insert(
                $table_name,
                array(
                    'message_sid' => $result['data']['sid'],
                    'from_number' => $from_number,
                    'to_number' => $to_number,
                    'body' => $message,
                    'received_at' => current_time('mysql')
                ),
                array('%s', '%s', '%s', '%s', '%s')
            );
            
            wp_send_json_success([
                'message' => 'SMS sent successfully',
                'data' => $result['data']
            ]);
        } else {
            wp_send_json_error('Failed to send SMS: ' . $result['error']);
        }
    }
    
    /**
     * Display Browser Phone page
     */
    public function display_browser_phone_page() {
        // Check if smart routing is configured on any phone numbers
        $smart_routing_configured = $this->check_smart_routing_status();
        
        // Get user's queue memberships
        $user_queues = $this->get_user_queue_memberships(get_current_user_id());
        ?>
        <div class="wrap">
            <h1>Browser Phone</h1>
            <p>Make and receive calls directly from your browser using Twilio Client.</p>
            
            <div class="browser-phone-container">
                <div class="phone-interface">
                    <div class="phone-display">
                        <div id="phone-status">Ready</div>
                        <div id="phone-number-display"></div>
                        <div id="call-timer" style="display: none;">00:00</div>
                    </div>
                    
                    <div class="phone-dialpad">
                        <input type="tel" id="phone-number-input" placeholder="Enter phone number" />
                        
                        <div class="dialpad-grid">
                            <button class="dialpad-btn" data-digit="1">1</button>
                            <button class="dialpad-btn" data-digit="2">2<span>ABC</span></button>
                            <button class="dialpad-btn" data-digit="3">3<span>DEF</span></button>
                            <button class="dialpad-btn" data-digit="4">4<span>GHI</span></button>
                            <button class="dialpad-btn" data-digit="5">5<span>JKL</span></button>
                            <button class="dialpad-btn" data-digit="6">6<span>MNO</span></button>
                            <button class="dialpad-btn" data-digit="7">7<span>PQRS</span></button>
                            <button class="dialpad-btn" data-digit="8">8<span>TUV</span></button>
                            <button class="dialpad-btn" data-digit="9">9<span>WXYZ</span></button>
                            <button class="dialpad-btn" data-digit="*">*</button>
                            <button class="dialpad-btn" data-digit="0">0<span>+</span></button>
                            <button class="dialpad-btn" data-digit="#">#</button>
                        </div>
                        
                        <div class="phone-controls">
                            <button id="call-btn" class="button button-primary button-large">
                                <span class="dashicons dashicons-phone"></span> Call
                            </button>
                            <button id="hangup-btn" class="button button-secondary button-large" style="display: none;">
                                <span class="dashicons dashicons-no"></span> Hang Up
                            </button>
                            <button id="answer-btn" class="button button-primary button-large" style="display: none;">
                                <span class="dashicons dashicons-phone"></span> Answer
                            </button>
                        </div>
                        
                        <div class="phone-controls-extra" style="display: none;">
                            <button id="mute-btn" class="button">
                                <span class="dashicons dashicons-microphone"></span> Mute
                            </button>
                            <button id="hold-btn" class="button">
                                <span class="dashicons dashicons-controls-pause"></span> Hold
                            </button>
                        </div>
                    </div>
                </div>
                
                <div class="phone-settings">
                    <h3>Settings</h3>
                    <p>
                        <label for="caller-id-select">Outbound Caller ID:</label>
                        <select id="caller-id-select">
                            <option value="">Loading numbers...</option>
                        </select>
                    </p>
                    <p>
                        <label>
                            <input type="checkbox" id="auto-answer" /> Auto-answer incoming calls
                        </label>
                    </p>
                    <div id="browser-phone-error" class="notice notice-error" style="display: none;"></div>
                    
                    <div class="call-mode-toggle">
                        <h4>📞 Call Reception Mode</h4>
                        <p>Choose how you want to receive incoming calls:</p>
                        
                        <div class="mode-selection">
                            <?php
                            $current_user_id = get_current_user_id();
                            $current_mode = get_user_meta($current_user_id, 'twp_call_mode', true);
                            if (empty($current_mode)) {
                                $current_mode = 'cell'; // Default to cell phone
                            }
                            ?>
                            
                            <label class="mode-option <?php echo $current_mode === 'browser' ? 'active' : ''; ?>">
                                <input type="radio" name="call_mode" value="browser" <?php checked($current_mode, 'browser'); ?>>
                                <div class="mode-icon">💻</div>
                                <div class="mode-details">
                                    <strong>Browser Phone</strong>
                                    <small>Calls ring in this browser</small>
                                </div>
                            </label>
                            
                            <label class="mode-option <?php echo $current_mode === 'cell' ? 'active' : ''; ?>">
                                <input type="radio" name="call_mode" value="cell" <?php checked($current_mode, 'cell'); ?>>
                                <div class="mode-icon">📱</div>
                                <div class="mode-details">
                                    <strong>Cell Phone</strong>
                                    <small>Forward to your mobile</small>
                                </div>
                            </label>
                        </div>
                        
                        <div class="mode-status">
                            <div id="current-mode-display">
                                <strong>Current Mode:</strong> 
                                <span id="mode-text"><?php echo $current_mode === 'browser' ? '💻 Browser Phone' : '📱 Cell Phone'; ?></span>
                            </div>
                            <button type="button" id="save-mode-btn" class="button button-primary" style="display: none;">
                                Save Changes
                            </button>
                        </div>
                        
                        <div class="mode-info">
                            <div class="browser-mode-info" style="display: <?php echo $current_mode === 'browser' ? 'block' : 'none'; ?>;">
                                <p><strong>Browser Mode:</strong> Keep this page open to receive calls. High-quality VoIP calling.</p>
                            </div>
                            <div class="cell-mode-info" style="display: <?php echo $current_mode === 'cell' ? 'block' : 'none'; ?>;">
                                <p><strong>Cell Mode:</strong> Calls forwarded to your mobile phone: 
                                <?php 
                                $user_phone = get_user_meta($current_user_id, 'twp_phone_number', true);
                                echo $user_phone ? esc_html($user_phone) : '<em>Not configured</em>';
                                ?>
                                </p>
                            </div>
                        </div>
                    </div>
                    
                    <?php if (!$smart_routing_configured && current_user_can('manage_options')): ?>
                    <div class="setup-info">
                        <h4>📋 Setup Required</h4>
                        <p>To enable mode switching, update your phone number webhook to:</p>
                        <code><?php echo home_url('/wp-json/twilio-webhook/v1/smart-routing'); ?></code>
                        <button type="button" class="button button-small" onclick="copyToClipboard('<?php echo home_url('/wp-json/twilio-webhook/v1/smart-routing'); ?>')">Copy</button>
                        <p><small>This smart routing URL will automatically route calls based on your current mode preference.</small></p>
                        <p><a href="<?php echo admin_url('admin.php?page=twilio-wp-plugin'); ?>#twiml-app-instructions" class="button button-primary">Auto-Configure</a></p>
                    </div>
                    <?php endif; ?>
                    
                    <?php if (!empty($user_queues)): ?>
                    <div class="queue-management">
                        <h4>📞 Call Queues</h4>
                        <p>Queues you're a member of:</p>
                        <div id="queue-list">
                            <?php foreach ($user_queues as $queue): ?>
                                <div class="queue-item" data-queue-id="<?php echo esc_attr($queue['id']); ?>">
                                    <div class="queue-info">
                                        <strong><?php echo esc_html($queue['name']); ?></strong>
                                        <span class="queue-waiting" id="queue-waiting-<?php echo esc_attr($queue['id']); ?>">
                                            Loading...
                                        </span>
                                    </div>
                                    <button type="button" class="button button-small accept-queue-call" 
                                            data-queue-id="<?php echo esc_attr($queue['id']); ?>" 
                                            disabled>
                                        Accept Next Call
                                    </button>
                                </div>
                            <?php endforeach; ?>
                        </div>
                        <div id="queue-status"></div>
                    </div>
                    <?php endif; ?>
                </div>
            </div>
            
            <style>
            .browser-phone-container {
                display: flex;
                gap: 30px;
                margin-top: 20px;
            }
            .phone-interface {
                background: #f5f5f5;
                border-radius: 10px;
                padding: 20px;
                width: 320px;
            }
            .phone-display {
                background: #333;
                color: white;
                padding: 20px;
                border-radius: 5px;
                text-align: center;
                margin-bottom: 20px;
            }
            #phone-status {
                font-size: 14px;
                color: #4CAF50;
                margin-bottom: 10px;
            }
            #phone-number-display {
                font-size: 18px;
                min-height: 25px;
            }
            #call-timer {
                font-size: 16px;
                margin-top: 10px;
            }
            #phone-number-input {
                width: 100%;
                padding: 10px;
                font-size: 18px;
                text-align: center;
                margin-bottom: 20px;
            }
            .dialpad-grid {
                display: grid;
                grid-template-columns: repeat(3, 1fr);
                gap: 10px;
                margin-bottom: 20px;
            }
            .dialpad-btn {
                padding: 15px;
                font-size: 20px;
                border: 1px solid #ddd;
                background: white;
                border-radius: 5px;
                cursor: pointer;
                position: relative;
            }
            .dialpad-btn:hover {
                background: #f0f0f0;
            }
            .dialpad-btn span {
                display: block;
                font-size: 10px;
                color: #666;
                margin-top: 2px;
            }
            .phone-controls {
                text-align: center;
                margin-bottom: 10px;
            }
            .phone-controls .button-large {
                width: 100%;
                height: 50px;
                font-size: 16px;
            }
            .phone-controls-extra {
                display: flex;
                gap: 10px;
                justify-content: center;
            }
            .phone-settings {
                flex: 1;
                max-width: 400px;
            }
            .incoming-calls-info {
                background: #e7f3ff;
                padding: 15px;
                border-radius: 4px;
                border-left: 4px solid #0073aa;
                margin-top: 20px;
            }
            .incoming-calls-info h4 {
                margin-top: 0;
                color: #0073aa;
            }
            .call-mode-toggle {
                background: #f0f8ff;
                padding: 20px;
                border-radius: 8px;
                border-left: 4px solid #2196F3;
                margin-top: 20px;
            }
            .call-mode-toggle h4 {
                margin-top: 0;
                color: #1976D2;
            }
            .mode-selection {
                display: flex;
                gap: 15px;
                margin: 15px 0;
            }
            .mode-option {
                display: flex;
                align-items: center;
                padding: 15px;
                border: 2px solid #ddd;
                border-radius: 8px;
                cursor: pointer;
                transition: all 0.3s ease;
                flex: 1;
                background: white;
            }
            .mode-option:hover {
                border-color: #2196F3;
                background: #f5f9ff;
            }
            .mode-option.active {
                border-color: #2196F3;
                background: #e3f2fd;
                box-shadow: 0 2px 4px rgba(33, 150, 243, 0.2);
            }
            .mode-option input[type="radio"] {
                margin: 0;
                margin-right: 12px;
            }
            .mode-icon {
                font-size: 24px;
                margin-right: 12px;
            }
            .mode-details {
                flex: 1;
            }
            .mode-details strong {
                display: block;
                margin-bottom: 2px;
            }
            .mode-details small {
                color: #666;
                font-size: 12px;
            }
            .mode-status {
                display: flex;
                align-items: center;
                justify-content: space-between;
                margin: 15px 0;
                padding: 10px;
                background: white;
                border-radius: 4px;
            }
            .mode-info {
                margin-top: 10px;
            }
            .setup-info {
                background: #fff3cd;
                padding: 15px;
                border-radius: 4px;
                border-left: 4px solid #ffc107;
                margin-top: 20px;
            }
            .setup-info h4 {
                margin-top: 0;
                color: #856404;
            }
            .queue-management {
                background: #f0f8ff;
                padding: 20px;
                border-radius: 8px;
                border-left: 4px solid #2196F3;
                margin-top: 20px;
            }
            .queue-management h4 {
                margin-top: 0;
                color: #1976D2;
            }
            .queue-item {
                display: flex;
                justify-content: space-between;
                align-items: center;
                padding: 10px;
                background: white;
                border: 1px solid #ddd;
                border-radius: 4px;
                margin-bottom: 10px;
            }
            .queue-info {
                flex: 1;
            }
            .queue-waiting {
                display: block;
                font-size: 12px;
                color: #666;
                margin-top: 2px;
            }
            .queue-waiting.has-calls {
                color: #d63384;
                font-weight: bold;
            }
            </style>
            
            <!-- Twilio Voice SDK v2 from unpkg CDN -->
            <script src="https://unpkg.com/@twilio/voice-sdk@2.11.0/dist/twilio.min.js"></script>
            <script>
            jQuery(document).ready(function($) {
                var device = null;
                var currentCall = null;
                var callTimer = null;
                var callStartTime = null;
                
                // Wait for SDK to load
                function waitForTwilioSDK(callback) {
                    if (typeof Twilio !== 'undefined' && Twilio.Device) {
                        callback();
                    } else {
                        console.log('Waiting for Twilio Voice SDK to load...');
                        setTimeout(function() {
                            waitForTwilioSDK(callback);
                        }, 100);
                    }
                }
                
                // Initialize the browser phone
                function initializeBrowserPhone() {
                    $('#phone-status').text('Initializing...');
                    
                    // Wait for SDK before proceeding
                    waitForTwilioSDK(function() {
                        // Get capability token (access token for v2)
                        $.post(ajaxurl, {
                            action: 'twp_generate_capability_token',
                            nonce: '<?php echo wp_create_nonce('twp_ajax_nonce'); ?>'
                        }, function(response) {
                            if (response.success) {
                                $('#browser-phone-error').hide();
                                setupTwilioDevice(response.data.token);
                            } else {
                                showError('Failed to initialize: ' + response.error);
                            }
                        }).fail(function() {
                            showError('Failed to connect to server');
                        });
                    });
                }
                
                async function setupTwilioDevice(token) {
                    try {
                        // Check if Twilio SDK is available
                        if (typeof Twilio === 'undefined' || !Twilio.Device) {
                            throw new Error('Twilio Voice SDK not loaded');
                        }
                        
                        // Clean up existing device if any
                        if (device) {
                            await device.destroy();
                        }
                        
                        // Setup Twilio Voice SDK v2 Device
                        // Note: Voice SDK v2 uses Twilio.Device directly, not Twilio.Voice.Device
                        device = new Twilio.Device(token, {
                            logLevel: 1, // 0 = TRACE, 1 = DEBUG
                            codecPreferences: ['opus', 'pcmu'],
                            edge: 'sydney' // Or closest edge location
                        });
                        
                        // Set up event handlers BEFORE registering
                        // Device registered and ready
                        device.on('registered', function() {
                            console.log('Device registered successfully');
                            $('#phone-status').text('Ready').css('color', '#4CAF50');
                            $('#call-btn').prop('disabled', false);
                        });
                        
                        // Handle errors
                        device.on('error', function(error) {
                            console.error('Twilio Device Error:', error);
                            
                            var errorMsg = error.message || error.toString();
                            
                            // Provide specific help for common errors
                            if (errorMsg.includes('valid callerId must be provided')) {
                                errorMsg = 'Caller ID error: Make sure you select a verified Twilio phone number as Caller ID. The number must be purchased through your Twilio account.';
                            } else if (errorMsg.includes('TwiML App')) {
                                errorMsg = 'TwiML App error: Check that your TwiML App SID is correctly configured in Settings.';
                            } else if (errorMsg.includes('token') || errorMsg.includes('Token')) {
                                errorMsg = 'Token error: ' + errorMsg + ' - The page will automatically try to refresh the token.';
                                // Try to reinitialize after token error
                                setTimeout(initializeBrowserPhone, 5000);
                            }
                            
                            showError(errorMsg);
                        });
                        
                        // Handle incoming calls
                        device.on('incoming', function(call) {
                            currentCall = call;
                            $('#phone-status').text('Incoming Call').css('color', '#FF9800');
                            $('#phone-number-display').text(call.parameters.From || 'Unknown Number');
                            $('#call-btn').hide();
                            $('#answer-btn').show();
                            
                            // Setup call event handlers
                            setupCallHandlers(call);
                            
                            if ($('#auto-answer').is(':checked')) {
                                call.accept();
                            }
                        });
                        
                        // Token about to expire
                        device.on('tokenWillExpire', function() {
                            console.log('Token will expire soon, refreshing...');
                            refreshToken();
                        });
                        
                        // Register device AFTER setting up event handlers
                        await device.register();
                        
                    } catch (error) {
                        console.error('Error setting up Twilio Device:', error);
                        showError('Failed to setup device: ' + error.message);
                    }
                }
                
                function setupCallHandlers(call) {
                    // Call accepted/connected
                    call.on('accept', function() {
                        $('#phone-status').text('Connected').css('color', '#2196F3');
                        $('#call-btn').hide();
                        $('#answer-btn').hide();
                        $('#hangup-btn').show();
                        $('#phone-controls-extra').show();
                        startCallTimer();
                    });
                    
                    // Call disconnected
                    call.on('disconnect', function() {
                        currentCall = null;
                        $('#phone-status').text('Ready').css('color', '#4CAF50');
                        $('#hangup-btn').hide();
                        $('#answer-btn').hide();
                        $('#call-btn').show();
                        $('#phone-controls-extra').hide();
                        $('#call-timer').hide();
                        stopCallTimer();
                    });
                    
                    // Call rejected
                    call.on('reject', function() {
                        currentCall = null;
                        $('#phone-status').text('Ready').css('color', '#4CAF50');
                        $('#answer-btn').hide();
                        $('#call-btn').show();
                    });
                    
                    // Call cancelled (by caller before answer)
                    call.on('cancel', function() {
                        currentCall = null;
                        $('#phone-status').text('Missed Call').css('color', '#FF9800');
                        $('#answer-btn').hide();
                        $('#call-btn').show();
                        setTimeout(function() {
                            $('#phone-status').text('Ready').css('color', '#4CAF50');
                        }, 3000);
                    });
                }
                
                function refreshToken() {
                    $.post(ajaxurl, {
                        action: 'twp_generate_capability_token',
                        nonce: '<?php echo wp_create_nonce('twp_ajax_nonce'); ?>'
                    }, function(response) {
                        if (response.success && device) {
                            device.updateToken(response.data.token);
                        }
                    }).fail(function() {
                        console.error('Failed to refresh token');
                    });
                }
                
                function showError(message) {
                    $('#browser-phone-error').html('<p><strong>Error:</strong> ' + message + '</p>').show();
                    $('#phone-status').text('Error').css('color', '#f44336');
                }
                
                function startCallTimer() {
                    callStartTime = new Date();
                    $('#call-timer').show();
                    
                    callTimer = setInterval(function() {
                        var elapsed = Math.floor((new Date() - callStartTime) / 1000);
                        var minutes = Math.floor(elapsed / 60);
                        var seconds = elapsed % 60;
                        $('#call-timer').text(
                            (minutes < 10 ? '0' : '') + minutes + ':' + 
                            (seconds < 10 ? '0' : '') + seconds
                        );
                    }, 1000);
                }
                
                function stopCallTimer() {
                    if (callTimer) {
                        clearInterval(callTimer);
                        callTimer = null;
                    }
                    $('#call-timer').text('00:00');
                }
                
                // Load phone numbers for caller ID
                $.post(ajaxurl, {
                    action: 'twp_get_phone_numbers',
                    nonce: '<?php echo wp_create_nonce('twp_ajax_nonce'); ?>'
                }, function(response) {
                    if (response.success) {
                        var options = '<option value="">Select caller ID...</option>';
                        response.data.forEach(function(number) {
                            options += '<option value="' + number.phone_number + '">' + number.phone_number + '</option>';
                        });
                        $('#caller-id-select').html(options);
                    }
                });
                
                // Dialpad functionality
                $('.dialpad-btn').on('click', function() {
                    var digit = $(this).data('digit');
                    var currentVal = $('#phone-number-input').val();
                    $('#phone-number-input').val(currentVal + digit);
                });
                
                // Call button
                $('#call-btn').on('click', async function() {
                    var phoneNumber = $('#phone-number-input').val().trim();
                    var callerId = $('#caller-id-select').val();
                    
                    if (!phoneNumber) {
                        alert('Please enter a phone number');
                        return;
                    }
                    
                    if (!callerId) {
                        alert('Please select a caller ID number. This must be a verified Twilio phone number.');
                        return;
                    }
                    
                    if (!device) {
                        alert('Phone is not initialized. Please refresh the page.');
                        return;
                    }
                    
                    // Format phone number
                    phoneNumber = phoneNumber.replace(/\D/g, '');
                    if (phoneNumber.length === 10) {
                        phoneNumber = '+1' + phoneNumber;
                    } else if (phoneNumber.length === 11 && phoneNumber.charAt(0) === '1') {
                        phoneNumber = '+' + phoneNumber;
                    } else if (!phoneNumber.startsWith('+')) {
                        phoneNumber = '+' + phoneNumber;
                    }
                    
                    $('#phone-number-display').text(phoneNumber);
                    $('#phone-status').text('Calling...').css('color', '#FF9800');
                    
                    try {
                        var params = {
                            To: phoneNumber,
                            From: callerId
                        };
                        
                        console.log('Making call with params:', params);
                        currentCall = await device.connect({params: params});
                        setupCallHandlers(currentCall);
                    } catch (error) {
                        console.error('Call error:', error);
                        showError('Failed to make call: ' + error.message);
                        $('#phone-status').text('Ready').css('color', '#4CAF50');
                    }
                });
                
                // Hangup button
                $('#hangup-btn').on('click', function() {
                    if (currentCall) {
                        currentCall.disconnect();
                    }
                });
                
                // Answer button
                $('#answer-btn').on('click', function() {
                    if (currentCall) {
                        currentCall.accept();
                    }
                });
                
                // Mute button
                $('#mute-btn').on('click', function() {
                    if (currentCall) {
                        var muted = currentCall.isMuted();
                        currentCall.mute(!muted);
                        $(this).text(muted ? 'Mute' : 'Unmute');
                        $(this).find('.dashicons').toggleClass('dashicons-microphone dashicons-microphone');
                    }
                });
                
                // Check if SDK loaded and initialize
                $(window).on('load', function() {
                    setTimeout(function() {
                        if (typeof Twilio === 'undefined') {
                            showError('Twilio Voice SDK failed to load. Please check your internet connection and try refreshing the page.');
                            console.error('Twilio SDK not found. Script may be blocked or failed to load.');
                        } else {
                            console.log('Twilio SDK loaded successfully');
                            initializeBrowserPhone();
                        }
                    }, 1000);
                });
                
                // Refresh token every 50 minutes (tokens expire in 1 hour)
                setInterval(initializeBrowserPhone, 50 * 60 * 1000);
                
                // Mode switching functionality
                $('input[name="call_mode"]').on('change', function() {
                    var selectedMode = $(this).val();
                    var currentMode = $('#mode-text').text().includes('Browser') ? 'browser' : 'cell';
                    
                    if (selectedMode !== currentMode) {
                        $('#save-mode-btn').show();
                        
                        // Update visual feedback
                        $('.mode-option').removeClass('active');
                        $(this).closest('.mode-option').addClass('active');
                        
                        // Update mode display
                        var modeText = selectedMode === 'browser' ? '💻 Browser Phone' : '📱 Cell Phone';
                        $('#mode-text').text(modeText + ' (unsaved)').css('color', '#ff9800');
                        
                        // Show appropriate info
                        $('.mode-info > div').hide();
                        $('.' + selectedMode + '-mode-info').show();
                    }
                });
                
                // Queue management functionality
                function loadQueueStatus() {
                    <?php if (!empty($user_queues)): ?>
                    $.post(ajaxurl, {
                        action: 'twp_get_waiting_calls',
                        nonce: '<?php echo wp_create_nonce('twp_ajax_nonce'); ?>'
                    }, function(response) {
                        if (response.success && response.data) {
                            var waitingCalls = response.data || [];
                            
                            // Update each queue
                            <?php foreach ($user_queues as $queue): ?>
                            var queueId = <?php echo $queue['id']; ?>;
                            var queueCalls = waitingCalls.filter(function(call) {
                                return call.queue_id == queueId;
                            });
                            
                            var $waitingSpan = $('#queue-waiting-' + queueId);
                            var $acceptBtn = $('[data-queue-id="' + queueId + '"]');
                            
                            if (queueCalls.length > 0) {
                                $waitingSpan.text(queueCalls.length + ' call(s) waiting')
                                           .addClass('has-calls');
                                $acceptBtn.prop('disabled', false);
                            } else {
                                $waitingSpan.text('No calls waiting')
                                           .removeClass('has-calls');
                                $acceptBtn.prop('disabled', true);
                            }
                            <?php endforeach; ?>
                        }
                    });
                    <?php endif; ?>
                }
                
                // Accept queue call
                $('.accept-queue-call').on('click', function() {
                    var queueId = $(this).data('queue-id');
                    var $button = $(this);
                    
                    $button.prop('disabled', true).text('Accepting...');
                    
                    $.post(ajaxurl, {
                        action: 'twp_accept_next_queue_call',
                        queue_id: queueId,
                        nonce: '<?php echo wp_create_nonce('twp_ajax_nonce'); ?>'
                    }, function(response) {
                        if (response.success) {
                            $('#queue-status').html('<div class="notice notice-success"><p>Call accepted! Connecting...</p></div>');
                            // Refresh queue status
                            setTimeout(loadQueueStatus, 1000);
                        } else {
                            $('#queue-status').html('<div class="notice notice-error"><p>Failed to accept call: ' + (response.data || 'Unknown error') + '</p></div>');
                        }
                    }).fail(function() {
                        $('#queue-status').html('<div class="notice notice-error"><p>Failed to accept call. Please try again.</p></div>');
                    }).always(function() {
                        $button.prop('disabled', false).text('Accept Next Call');
                    });
                });
                
                // Load queue status on page load and refresh every 5 seconds
                <?php if (!empty($user_queues)): ?>
                loadQueueStatus();
                setInterval(loadQueueStatus, 5000);
                <?php endif; ?>
                
                // Save mode button
                $('#save-mode-btn').on('click', function() {
                    var button = $(this);
                    var selectedMode = $('input[name="call_mode"]:checked').val();
                    
                    button.prop('disabled', true).text('Saving...');
                    
                    $.post(ajaxurl, {
                        action: 'twp_save_call_mode',
                        mode: selectedMode,
                        nonce: '<?php echo wp_create_nonce('twp_ajax_nonce'); ?>'
                    }, function(response) {
                        if (response.success) {
                            var modeText = selectedMode === 'browser' ? '💻 Browser Phone' : '📱 Cell Phone';
                            $('#mode-text').text(modeText).css('color', '#333');
                            $('#save-mode-btn').hide();
                            
                            // Show success message
                            var successMsg = $('<div class="notice notice-success" style="margin: 10px 0; padding: 10px;"><p>Call mode updated successfully!</p></div>');
                            $('.mode-status').after(successMsg);
                            setTimeout(function() {
                                successMsg.fadeOut();
                            }, 3000);
                        } else {
                            alert('Failed to save mode: ' + (response.error || 'Unknown error'));
                        }
                    }).fail(function() {
                        alert('Failed to save mode. Please try again.');
                    }).always(function() {
                        button.prop('disabled', false).text('Save Changes');
                    });
                });
            });
            </script>
        </div>
        <?php
    }
    
    /**
     * Check if smart routing is configured on any phone numbers
     */
    private function check_smart_routing_status() {
        try {
            $twilio = new TWP_Twilio_API();
            $phone_numbers = $twilio->get_phone_numbers();
            
            if (!$phone_numbers['success']) {
                return false;
            }
            
            $smart_routing_url = home_url('/wp-json/twilio-webhook/v1/smart-routing');
            
            foreach ($phone_numbers['data']['incoming_phone_numbers'] as $number) {
                if ($number['voice_url'] === $smart_routing_url) {
                    return true;
                }
            }
            
            return false;
        } catch (Exception $e) {
            error_log('TWP: Error checking smart routing status: ' . $e->getMessage());
            return false;
        }
    }
    
    /**
     * Get user's queue memberships
     */
    private function get_user_queue_memberships($user_id) {
        global $wpdb;
        
        // Get agent groups the user belongs to
        $groups_table = $wpdb->prefix . 'twp_group_members';
        $queues_table = $wpdb->prefix . 'twp_call_queues';
        
        $user_groups = $wpdb->get_results($wpdb->prepare(
            "SELECT gm.group_id, q.id as queue_id, q.queue_name
             FROM $groups_table gm
             JOIN $queues_table q ON gm.group_id = q.agent_group_id
             WHERE gm.user_id = %d",
            $user_id
        ));
        
        $queues = [];
        foreach ($user_groups as $group) {
            $queues[$group->queue_id] = [
                'id' => $group->queue_id,
                'name' => $group->queue_name
            ];
        }
        
        return array_values($queues);
    }
    
}