<?php
/**
 * Standalone Mobile Phone Page
 *
 * Registers a front-end endpoint at /twp-phone/ that serves the browser phone UI
 * without any wp-admin chrome. Designed for mobile WebView usage.
 *
 * @package Twilio_WP_Plugin
 */
class TWP_Mobile_Phone_Page {

    /**
     * The endpoint slug.
     */
    const ENDPOINT = 'twp-phone';

    /**
     * Constructor — wire up hooks.
     */
    public function __construct() {
        add_action('init', array($this, 'register_rewrite'));
        add_action('template_redirect', array($this, 'handle_request'));
        add_filter('query_vars', array($this, 'add_query_var'));

        // Extend session cookie for phone agents.
        add_filter('auth_cookie_expiration', array($this, 'extend_agent_cookie'), 10, 3);

        // AJAX action for FCM token registration (uses WP cookie auth).
        add_action('wp_ajax_twp_register_fcm_token', array($this, 'ajax_register_fcm_token'));
    }

    /**
     * AJAX handler: register FCM token for the current user.
     */
    public function ajax_register_fcm_token() {
        check_ajax_referer('twp_ajax_nonce', 'nonce');

        $fcm_token = sanitize_text_field($_POST['fcm_token'] ?? '');
        if (empty($fcm_token)) {
            wp_send_json_error('Missing FCM token');
        }

        $user_id = get_current_user_id();
        if (!$user_id) {
            wp_send_json_error('Not authenticated');
        }

        // Store FCM token (same as TWP_Mobile_API::register_fcm_token)
        global $wpdb;
        $table = $wpdb->prefix . 'twp_mobile_sessions';

        // Update existing session or insert new one
        $existing = $wpdb->get_row($wpdb->prepare(
            "SELECT id FROM $table WHERE user_id = %d AND fcm_token = %s AND is_active = 1",
            $user_id, $fcm_token
        ));

        if (!$existing) {
            $wpdb->insert($table, array(
                'user_id'   => $user_id,
                'fcm_token' => $fcm_token,
                'device_info' => 'WebView Mobile App',
                'is_active' => 1,
                'created_at' => current_time('mysql'),
                'expires_at' => date('Y-m-d H:i:s', time() + 7 * DAY_IN_SECONDS),
            ));
        }

        wp_send_json_success('FCM token registered');
    }

    /**
     * Register custom rewrite rule.
     */
    public function register_rewrite() {
        add_rewrite_rule(
            '^' . self::ENDPOINT . '/?$',
            'index.php?twp_phone_page=1',
            'top'
        );
    }

    /**
     * Expose query variable.
     *
     * @param array $vars Existing query vars.
     * @return array
     */
    public function add_query_var($vars) {
        $vars[] = 'twp_phone_page';
        return $vars;
    }

    /**
     * Handle the request on template_redirect.
     */
    public function handle_request() {
        if (!get_query_var('twp_phone_page')) {
            return;
        }

        // Authentication check — redirect to login if not authenticated.
        if (!is_user_logged_in()) {
            $redirect_url = home_url('/' . self::ENDPOINT . '/');
            wp_redirect(wp_login_url($redirect_url));
            exit;
        }

        // Capability check.
        if (!current_user_can('twp_access_browser_phone')) {
            wp_die(
                'You do not have permission to access the browser phone.',
                'Access Denied',
                array('response' => 403)
            );
        }

        // Render the standalone page and exit.
        $this->render_page();
        exit;
    }

    /**
     * Extend auth cookie to 7 days for phone agents.
     *
     * @param int  $expiration Default expiration in seconds.
     * @param int  $user_id    User ID.
     * @param bool $remember   Whether "Remember Me" was checked.
     * @return int
     */
    public function extend_agent_cookie($expiration, $user_id, $remember) {
        $user = get_userdata($user_id);
        if ($user && $user->has_cap('twp_access_browser_phone')) {
            return 7 * DAY_IN_SECONDS;
        }
        return $expiration;
    }

    // ------------------------------------------------------------------
    // Rendering
    // ------------------------------------------------------------------

    /**
     * Output the complete standalone HTML page.
     */
    private function render_page() {
        // Gather data needed by the template (same as display_browser_phone_page).
        $current_user_id = get_current_user_id();

        global $wpdb;
        $extensions_table = $wpdb->prefix . 'twp_user_extensions';
        $extension_data = $wpdb->get_row($wpdb->prepare(
            "SELECT extension FROM $extensions_table WHERE user_id = %d",
            $current_user_id
        ));

        if (!$extension_data) {
            TWP_User_Queue_Manager::create_user_queues($current_user_id);
            $extension_data = $wpdb->get_row($wpdb->prepare(
                "SELECT extension FROM $extensions_table WHERE user_id = %d",
                $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);
        $is_logged_in  = TWP_Agent_Manager::is_agent_logged_in($current_user_id);

        $current_mode = get_user_meta($current_user_id, 'twp_call_mode', true);
        if (empty($current_mode)) {
            $current_mode = 'cell';
        }

        $user_phone = get_user_meta($current_user_id, 'twp_phone_number', true);

        // Smart routing check (for admin-only setup notice).
        $smart_routing_configured = false;
        try {
            $twilio = new TWP_Twilio_API();
            $phone_numbers = $twilio->get_phone_numbers();
            if ($phone_numbers['success']) {
                $smart_routing_url = home_url('/wp-json/twilio-webhook/v1/smart-routing');
                foreach ($phone_numbers['data']['incoming_phone_numbers'] as $number) {
                    if (isset($number['voice_url']) && strpos($number['voice_url'], 'smart-routing') !== false) {
                        $smart_routing_configured = true;
                        break;
                    }
                }
            }
        } catch (Exception $e) {
            // Silently continue.
        }

        // Nonce for AJAX.
        $nonce = wp_create_nonce('twp_ajax_nonce');

        // URLs.
        $ajax_url       = admin_url('admin-ajax.php');
        $ringtone_url   = plugins_url('assets/sounds/ringtone.mp3', dirname(__FILE__));
        $phone_icon_url = plugins_url('assets/images/phone-icon.png', dirname(__FILE__));
        $sw_url         = plugins_url('assets/js/twp-service-worker.js', dirname(__FILE__));
        $twilio_edge    = esc_js(get_option('twp_twilio_edge', 'roaming'));
        $smart_routing_webhook = home_url('/wp-json/twilio-webhook/v1/smart-routing');

        // Plugin file reference for plugins_url() in template.
        $plugin_file = dirname(__FILE__) . '/../twilio-wp-plugin.php';

        // Load the template (all variables above are in scope).
        require TWP_PLUGIN_DIR . 'assets/mobile/phone-template.php';
    }
}