<?php
/**
 * Core plugin class
 */
class TWP_Core {
    
    protected $loader;
    protected $plugin_name;
    protected $version;
    
    /**
     * Constructor
     */
    public function __construct() {
        $this->version = TWP_VERSION;
        $this->plugin_name = 'twilio-wp-plugin';
        
        $this->load_dependencies();
        $this->set_locale();
        $this->ensure_user_roles();
        $this->define_admin_hooks();
        $this->define_public_hooks();
        $this->define_api_hooks();
    }
    
    /**
     * Load required dependencies
     */
    private function load_dependencies() {
        // Loader class
        require_once TWP_PLUGIN_DIR . 'includes/class-twp-loader.php';
        
        // API classes
        require_once TWP_PLUGIN_DIR . 'includes/class-twp-twilio-api.php';
        require_once TWP_PLUGIN_DIR . 'includes/class-twp-elevenlabs-api.php';
        
        // Feature classes
        require_once TWP_PLUGIN_DIR . 'includes/class-twp-scheduler.php';
        require_once TWP_PLUGIN_DIR . 'includes/class-twp-call-queue.php';
        require_once TWP_PLUGIN_DIR . 'includes/class-twp-workflow.php';
        require_once TWP_PLUGIN_DIR . 'includes/class-twp-webhooks.php';
        require_once TWP_PLUGIN_DIR . 'includes/class-twp-call-logger.php';
        require_once TWP_PLUGIN_DIR . 'includes/class-twp-agent-groups.php';
        require_once TWP_PLUGIN_DIR . 'includes/class-twp-agent-manager.php';
        require_once TWP_PLUGIN_DIR . 'includes/class-twp-callback-manager.php';
        
        // Admin classes
        require_once TWP_PLUGIN_DIR . 'admin/class-twp-admin.php';
        
        $this->loader = new TWP_Loader();
    }
    
    /**
     * Define locale for internationalization
     */
    private function set_locale() {
        add_action('plugins_loaded', function() {
            load_plugin_textdomain(
                'twilio-wp-plugin',
                false,
                dirname(TWP_PLUGIN_BASENAME) . '/languages/'
            );
        });
    }
    
    /**
     * Ensure custom user roles exist
     */
    private function ensure_user_roles() {
        $role = get_role('phone_agent');
        
        if (!$role) {
            // Create the Phone Agent role with limited capabilities
            add_role('phone_agent', 'Phone Agent', array(
                // Basic WordPress capabilities
                'read' => true,
                
                // Profile management
                'edit_profile' => true,
                
                // Phone agent specific capabilities
                'twp_access_voicemails' => true,
                'twp_access_call_log' => true,
                'twp_access_agent_queue' => true,
                'twp_access_outbound_calls' => true,
                'twp_access_sms_inbox' => true,
                'twp_access_browser_phone' => true,
                'twp_access_phone_numbers' => true,
            ));
        } else {
            // Update existing role with any missing capabilities
            $capabilities = array(
                'twp_access_voicemails',
                'twp_access_call_log',
                'twp_access_agent_queue',
                'twp_access_outbound_calls',
                'twp_access_sms_inbox',
                'twp_access_browser_phone',
                'twp_access_phone_numbers'
            );
            
            foreach ($capabilities as $cap) {
                if (!$role->has_cap($cap)) {
                    $role->add_cap($cap);
                }
            }
        }
    }
    
    /**
     * Register admin hooks
     */
    private function define_admin_hooks() {
        $plugin_admin = new TWP_Admin($this->get_plugin_name(), $this->get_version());
        
        $this->loader->add_action('admin_enqueue_scripts', $plugin_admin, 'enqueue_styles');
        $this->loader->add_action('admin_enqueue_scripts', $plugin_admin, 'enqueue_scripts');
        $this->loader->add_action('admin_menu', $plugin_admin, 'add_plugin_admin_menu');
        $this->loader->add_action('admin_init', $plugin_admin, 'register_settings');
        $this->loader->add_action('admin_notices', $plugin_admin, 'show_admin_notices');
        
        // AJAX handlers
        $this->loader->add_action('wp_ajax_twp_save_schedule', $plugin_admin, 'ajax_save_schedule');
        $this->loader->add_action('wp_ajax_twp_delete_schedule', $plugin_admin, 'ajax_delete_schedule');
        $this->loader->add_action('wp_ajax_twp_get_schedules', $plugin_admin, 'ajax_get_schedules');
        $this->loader->add_action('wp_ajax_twp_get_schedule', $plugin_admin, 'ajax_get_schedule');
        $this->loader->add_action('wp_ajax_twp_save_workflow', $plugin_admin, 'ajax_save_workflow');
        $this->loader->add_action('wp_ajax_twp_update_workflow', $plugin_admin, 'ajax_save_workflow');
        $this->loader->add_action('wp_ajax_twp_get_workflow', $plugin_admin, 'ajax_get_workflow');
        $this->loader->add_action('wp_ajax_twp_delete_workflow', $plugin_admin, 'ajax_delete_workflow');
        
        // Phone number management AJAX
        $this->loader->add_action('wp_ajax_twp_get_phone_numbers', $plugin_admin, 'ajax_get_phone_numbers');
        $this->loader->add_action('wp_ajax_twp_search_available_numbers', $plugin_admin, 'ajax_search_available_numbers');
        $this->loader->add_action('wp_ajax_twp_purchase_number', $plugin_admin, 'ajax_purchase_number');
        $this->loader->add_action('wp_ajax_twp_configure_number', $plugin_admin, 'ajax_configure_number');
        $this->loader->add_action('wp_ajax_twp_release_number', $plugin_admin, 'ajax_release_number');
        
        // Queue management AJAX
        $this->loader->add_action('wp_ajax_twp_get_queue', $plugin_admin, 'ajax_get_queue');
        $this->loader->add_action('wp_ajax_twp_save_queue', $plugin_admin, 'ajax_save_queue');
        $this->loader->add_action('wp_ajax_twp_get_queue_details', $plugin_admin, 'ajax_get_queue_details');
        $this->loader->add_action('wp_ajax_twp_get_all_queues', $plugin_admin, 'ajax_get_all_queues');
        $this->loader->add_action('wp_ajax_twp_delete_queue', $plugin_admin, 'ajax_delete_queue');
        $this->loader->add_action('wp_ajax_twp_get_dashboard_stats', $plugin_admin, 'ajax_get_dashboard_stats');
        
        // Eleven Labs AJAX
        $this->loader->add_action('wp_ajax_twp_get_elevenlabs_voices', $plugin_admin, 'ajax_get_elevenlabs_voices');
        $this->loader->add_action('wp_ajax_twp_get_elevenlabs_models', $plugin_admin, 'ajax_get_elevenlabs_models');
        $this->loader->add_action('wp_ajax_twp_preview_voice', $plugin_admin, 'ajax_preview_voice');
        
        // Voicemail management AJAX
        $this->loader->add_action('wp_ajax_twp_get_voicemail', $plugin_admin, 'ajax_get_voicemail');
        $this->loader->add_action('wp_ajax_twp_delete_voicemail', $plugin_admin, 'ajax_delete_voicemail');
        $this->loader->add_action('wp_ajax_twp_transcribe_voicemail', $plugin_admin, 'ajax_transcribe_voicemail');
        $this->loader->add_action('wp_ajax_twp_get_voicemail_audio', $plugin_admin, 'ajax_get_voicemail_audio');
        
        // Agent group management AJAX
        $this->loader->add_action('wp_ajax_twp_get_all_groups', $plugin_admin, 'ajax_get_all_groups');
        $this->loader->add_action('wp_ajax_twp_get_group', $plugin_admin, 'ajax_get_group');
        $this->loader->add_action('wp_ajax_twp_save_group', $plugin_admin, 'ajax_save_group');
        $this->loader->add_action('wp_ajax_twp_delete_group', $plugin_admin, 'ajax_delete_group');
        $this->loader->add_action('wp_ajax_twp_get_group_members', $plugin_admin, 'ajax_get_group_members');
        $this->loader->add_action('wp_ajax_twp_add_group_member', $plugin_admin, 'ajax_add_group_member');
        $this->loader->add_action('wp_ajax_twp_remove_group_member', $plugin_admin, 'ajax_remove_group_member');
        
        // Agent queue management AJAX
        $this->loader->add_action('wp_ajax_twp_accept_call', $plugin_admin, 'ajax_accept_call');
        $this->loader->add_action('wp_ajax_twp_accept_next_queue_call', $plugin_admin, 'ajax_accept_next_queue_call');
        $this->loader->add_action('wp_ajax_twp_get_waiting_calls', $plugin_admin, 'ajax_get_waiting_calls');
        $this->loader->add_action('wp_ajax_twp_set_agent_status', $plugin_admin, 'ajax_set_agent_status');
        $this->loader->add_action('wp_ajax_twp_get_call_details', $plugin_admin, 'ajax_get_call_details');
        
        // Callback and outbound call AJAX
        $this->loader->add_action('wp_ajax_twp_request_callback', $plugin_admin, 'ajax_request_callback');
        $this->loader->add_action('wp_ajax_twp_initiate_outbound_call', $plugin_admin, 'ajax_initiate_outbound_call');
        $this->loader->add_action('wp_ajax_twp_initiate_outbound_call_with_from', $plugin_admin, 'ajax_initiate_outbound_call_with_from');
        $this->loader->add_action('wp_ajax_twp_get_callbacks', $plugin_admin, 'ajax_get_callbacks');
        
        // Phone number maintenance
        $this->loader->add_action('wp_ajax_twp_update_phone_status_callbacks', $plugin_admin, 'ajax_update_phone_status_callbacks');
        $this->loader->add_action('wp_ajax_twp_toggle_number_status_callback', $plugin_admin, 'ajax_toggle_number_status_callback');
        
        // Browser phone
        $this->loader->add_action('wp_ajax_twp_generate_capability_token', $plugin_admin, 'ajax_generate_capability_token');
        $this->loader->add_action('wp_ajax_twp_save_call_mode', $plugin_admin, 'ajax_save_call_mode');
        $this->loader->add_action('wp_ajax_twp_auto_configure_twiml_app', $plugin_admin, 'ajax_auto_configure_twiml_app');
        $this->loader->add_action('wp_ajax_twp_configure_phone_numbers_only', $plugin_admin, 'ajax_configure_phone_numbers_only');
        
        // SMS management
        $this->loader->add_action('wp_ajax_twp_delete_sms', $plugin_admin, 'ajax_delete_sms');
        $this->loader->add_action('wp_ajax_twp_delete_conversation', $plugin_admin, 'ajax_delete_conversation');
        $this->loader->add_action('wp_ajax_twp_get_conversation', $plugin_admin, 'ajax_get_conversation');
        $this->loader->add_action('wp_ajax_twp_send_sms_reply', $plugin_admin, 'ajax_send_sms_reply');
    }
    
    /**
     * Register public hooks
     */
    private function define_public_hooks() {
        // Webhook endpoints
        $webhooks = new TWP_Webhooks();
        $this->loader->add_action('init', $webhooks, 'register_endpoints');
        
        // Initialize Agent Manager
        TWP_Agent_Manager::init();
        
        // Scheduled events
        $scheduler = new TWP_Scheduler();
        $this->loader->add_action('twp_check_schedules', $scheduler, 'check_active_schedules');
        
        $queue = new TWP_Call_Queue();
        $this->loader->add_action('twp_process_queue', $queue, 'process_waiting_calls');
        
        // Callback processing
        $this->loader->add_action('twp_process_callbacks', 'TWP_Callback_Manager', 'process_callbacks');
        
        // Call queue cleanup
        $this->loader->add_action('twp_cleanup_old_calls', $this, 'cleanup_old_calls');
        
        // Schedule cron events
        if (!wp_next_scheduled('twp_check_schedules')) {
            wp_schedule_event(time(), 'twp_every_minute', 'twp_check_schedules');
        }
        
        if (!wp_next_scheduled('twp_process_queue')) {
            wp_schedule_event(time(), 'twp_every_30_seconds', 'twp_process_queue');
        }
        
        if (!wp_next_scheduled('twp_process_callbacks')) {
            wp_schedule_event(time(), 'twp_every_minute', 'twp_process_callbacks');
        }
        
        if (!wp_next_scheduled('twp_cleanup_old_calls')) {
            wp_schedule_event(time(), 'hourly', 'twp_cleanup_old_calls');
        }
    }
    
    /**
     * Register API hooks
     */
    private function define_api_hooks() {
        // REST API endpoints
        add_action('rest_api_init', function() {
            register_rest_route('twilio-wp/v1', '/schedules', array(
                'methods' => 'GET',
                'callback' => array('TWP_Scheduler', 'get_schedules'),
                'permission_callback' => function() {
                    return current_user_can('manage_options');
                }
            ));
            
            register_rest_route('twilio-wp/v1', '/workflows', array(
                'methods' => 'GET',
                'callback' => array('TWP_Workflow', 'get_workflows'),
                'permission_callback' => function() {
                    return current_user_can('manage_options');
                }
            ));
            
            register_rest_route('twilio-wp/v1', '/queue-status', array(
                'methods' => 'GET',
                'callback' => array('TWP_Call_Queue', 'get_queue_status'),
                'permission_callback' => function() {
                    return current_user_can('manage_options');
                }
            ));
        });
    }
    
    /**
     * Run the loader
     */
    public function run() {
        // Initialize webhooks
        $webhooks = new TWP_Webhooks();
        $webhooks->register_endpoints();
        
        // Add custom cron schedules
        add_filter('cron_schedules', function($schedules) {
            $schedules['twp_every_minute'] = array(
                'interval' => 60,
                'display' => __('Every Minute', 'twilio-wp-plugin')
            );
            $schedules['twp_every_30_seconds'] = array(
                'interval' => 30,
                'display' => __('Every 30 Seconds', 'twilio-wp-plugin')
            );
            return $schedules;
        });
        
        $this->loader->run();
    }
    
    /**
     * Get plugin name
     */
    public function get_plugin_name() {
        return $this->plugin_name;
    }
    
    /**
     * Get version
     */
    public function get_version() {
        return $this->version;
    }
    
    /**
     * Cleanup old stuck calls
     */
    public function cleanup_old_calls() {
        global $wpdb;
        $calls_table = $wpdb->prefix . 'twp_queued_calls';
        
        // Clean up calls that have been in 'answered' status for more than 2 hours
        // These are likely stuck due to missed webhooks or other issues
        $updated = $wpdb->query(
            "UPDATE $calls_table 
             SET status = 'completed', ended_at = NOW() 
             WHERE status = 'answered' 
             AND joined_at < DATE_SUB(NOW(), INTERVAL 2 HOUR)"
        );
        
        if ($updated > 0) {
            error_log("TWP Cleanup: Updated {$updated} stuck calls from 'answered' to 'completed' status");
        }
        
        // Backup check for waiting calls (status callbacks should handle most cases)
        // Only check older calls that might have missed status callbacks
        $waiting_calls = $wpdb->get_results(
            "SELECT call_sid FROM $calls_table 
             WHERE status = 'waiting' 
             AND joined_at < DATE_SUB(NOW(), INTERVAL 30 MINUTE)
             AND joined_at > DATE_SUB(NOW(), INTERVAL 6 HOUR)
             LIMIT 5"
        );
        
        if (!empty($waiting_calls)) {
            $twilio = new TWP_Twilio_API();
            $cleaned_count = 0;
            
            foreach ($waiting_calls as $call) {
                try {
                    // Check call status with Twilio
                    $call_info = $twilio->get_call_info($call->call_sid);
                    
                    if ($call_info && isset($call_info['status'])) {
                        // If call is completed, busy, failed, or canceled, remove from queue
                        if (in_array($call_info['status'], ['completed', 'busy', 'failed', 'canceled'])) {
                            $wpdb->update(
                                $calls_table,
                                array(
                                    'status' => 'hangup',
                                    'ended_at' => current_time('mysql')
                                ),
                                array('call_sid' => $call->call_sid),
                                array('%s', '%s'),
                                array('%s')
                            );
                            $cleaned_count++;
                            error_log("TWP Cleanup: Detected ended call {$call->call_sid} with status {$call_info['status']}");
                        }
                    }
                } catch (Exception $e) {
                    error_log("TWP Cleanup: Error checking call {$call->call_sid}: " . $e->getMessage());
                }
            }
            
            if ($cleaned_count > 0) {
                error_log("TWP Cleanup: Cleaned up {$cleaned_count} ended calls from queue");
            }
        }
        
        // Clean up very old waiting calls (older than 24 hours) - these are likely orphaned
        $updated_waiting = $wpdb->query(
            "UPDATE $calls_table 
             SET status = 'timeout', ended_at = NOW() 
             WHERE status = 'waiting' 
             AND joined_at < DATE_SUB(NOW(), INTERVAL 24 HOUR)"
        );
        
        if ($updated_waiting > 0) {
            error_log("TWP Cleanup: Updated {$updated_waiting} old waiting calls to 'timeout' status");
        }
    }
}