<?php
/**
 * HVAC Shortcodes Manager
 *
 * Centralized management of all plugin shortcodes
 *
 * @package HVAC_Community_Events
 * @since 2.0.0
 */

if (!defined('ABSPATH')) {
    exit;
}

/**
 * HVAC_Shortcodes class
 */
class HVAC_Shortcodes {
    
    /**
     * Instance
     * 
     * @var HVAC_Shortcodes
     */
    private static $instance = null;
    
    /**
     * Registered shortcodes
     * 
     * @var array
     */
    private $shortcodes = array();
    
    /**
     * Get instance
     * 
     * @return HVAC_Shortcodes
     */
    public static function instance() {
        if (null === self::$instance) {
            self::$instance = new self();
        }
        return self::$instance;
    }
    
    /**
     * Constructor
     */
    private function __construct() {
        $this->define_shortcodes();
        $this->register_shortcodes();
        $this->register_ajax_handlers();
    }
    
    /**
     * Define all plugin shortcodes
     * 
     * @return void
     */
    private function define_shortcodes() {
        $this->shortcodes = array(
            // Dashboard shortcodes
            'hvac_dashboard' => array(
                'callback' => array($this, 'render_dashboard'),
                'description' => 'Trainer dashboard'
            ),
            'hvac_master_dashboard' => array(
                'callback' => array($this, 'render_master_dashboard'),
                'description' => 'Master trainer dashboard'
            ),
            
            // Event management shortcodes
            // ENABLED - Phase 2 Native HVAC Implementation
            'hvac_manage_event' => array(
                'callback' => array($this, 'render_manage_event'),
                'description' => 'Event management hub with integrated navigation'
            ),
            'hvac_create_event' => array(
                'callback' => array($this, 'render_create_event'),
                'description' => 'Create new event with HVAC Event Form Builder'
            ),
            'hvac_edit_event' => array(
                'callback' => array($this, 'render_edit_event'),
                'description' => 'Edit event with HVAC Event Form Builder'
            ),
            'hvac_event_summary' => array(
                'callback' => array($this, 'render_event_summary'),
                'description' => 'Event summary page'
            ),
            
            // Authentication shortcodes
            'hvac_community_login' => array(
                'callback' => array($this, 'render_login'),
                'description' => 'Community login form'
            ),
            'hvac_trainer_registration' => array(
                'callback' => array($this, 'render_registration'),
                'description' => 'Trainer registration form'
            ),
            'hvac_edit_profile' => array(
                'callback' => array($this, 'render_edit_profile'),
                'description' => 'Edit trainer profile form'
            ),
            
            // Profile shortcodes
            'hvac_trainer_profile' => array(
                'callback' => array($this, 'render_trainer_profile'),
                'description' => 'Trainer profile page'
            ),
            
            // Certificate shortcodes
            'hvac_certificate_reports' => array(
                'callback' => array($this, 'render_certificate_reports'),
                'description' => 'Certificate reports page'
            ),
            'hvac_generate_certificates' => array(
                'callback' => array($this, 'render_generate_certificates'),
                'description' => 'Certificate generation page'
            ),
            
            // Communication shortcodes
            'hvac_email_attendees' => array(
                'callback' => array($this, 'render_email_attendees'),
                'description' => 'Email attendees interface'
            ),
            'hvac_communication_templates' => array(
                'callback' => array($this, 'render_communication_templates'),
                'description' => 'Communication templates management'
            ),
            'hvac_communication_schedules' => array(
                'callback' => array($this, 'render_communication_schedules'),
                'description' => 'Communication schedules management'
            ),
            
            // Venue shortcodes
            'hvac_trainer_venues_list' => array(
                'callback' => array($this, 'render_venues_list'),
                'description' => 'Trainer venues listing page'
            ),
            'hvac_trainer_venue_manage' => array(
                'callback' => array($this, 'render_venue_manage'),
                'description' => 'Trainer venue management page'
            ),
            
            // Organizer shortcodes - Handled by HVAC_Organizers class
            'hvac_trainer_organizers_list' => array(
                'callback' => array($this, 'render_organizers_list'),
                'description' => 'Trainer organizers listing page'
            ),
            'hvac_trainer_organizer_manage' => array(
                'callback' => array($this, 'render_organizer_manage'),
                'description' => 'Trainer organizer management page'
            ),
            
            // Profile shortcodes - additional ones beyond hvac_trainer_profile
            'hvac_trainer_profile_view' => array(
                'callback' => array($this, 'render_trainer_profile_view'),
                'description' => 'Trainer profile view page'
            ),
            'hvac_trainer_profile_edit' => array(
                'callback' => array($this, 'render_trainer_profile_edit'),
                'description' => 'Trainer profile edit page'
            ),
            
            // Admin shortcodes
            'hvac_google_sheets' => array(
                'callback' => array($this, 'render_google_sheets_admin'),
                'description' => 'Google Sheets integration admin'
            ),
        );
        
        // Allow filtering of shortcode definitions
        $this->shortcodes = apply_filters('hvac_shortcode_definitions', $this->shortcodes);
    }
    
    /**
     * Register all shortcodes
     * 
     * @return void
     */
    private function register_shortcodes() {
        foreach ($this->shortcodes as $tag => $config) {
            add_shortcode($tag, $config['callback']);
        }
        
        // Log registration
        HVAC_Logger::info('Registered ' . count($this->shortcodes) . ' shortcodes', 'Shortcodes');
    }
    
    /**
     * Get registered shortcodes
     * 
     * @return array
     */
    public function get_shortcodes() {
        return $this->shortcodes;
    }
    
    /**
     * Check if shortcode is registered
     * 
     * @param string $tag Shortcode tag
     * @return bool
     */
    public function is_registered($tag) {
        return isset($this->shortcodes[$tag]);
    }
    
    // ========================================
    // Shortcode Render Methods
    // ========================================
    
    /**
     * Render dashboard shortcode
     * 
     * @param array $atts Shortcode attributes
     * @return string
     */
    public function render_dashboard($atts = array()) {
        // Add debug comment to verify this method is being called
        $debug = '<!-- HVAC_Shortcodes::render_dashboard called -->';
        
        // Use the HVAC_Community_Events instance method
        if (class_exists('HVAC_Community_Events')) {
            $hvac = HVAC_Community_Events::get_instance();
            if (method_exists($hvac, 'render_dashboard')) {
                return $debug . $hvac->render_dashboard();
            }
        }
        
        // Fallback if class not available
        if (!is_user_logged_in()) {
            return $debug . '<p>' . __('Please log in to view the dashboard.', 'hvac-community-events') . '</p>';
        }
        
        // Include the dashboard template
        ob_start();
        include HVAC_PLUGIN_DIR . 'templates/template-hvac-dashboard.php';
        return ob_get_clean();
    }
    
    /**
     * Render master dashboard shortcode
     * 
     * @param array $atts Shortcode attributes
     * @return string
     */
    public function render_master_dashboard($atts = array()) {
        // Add debug comment to verify this method is being called
        $debug = '<!-- HVAC_Shortcodes::render_master_dashboard called -->';
        
        // Use the HVAC_Community_Events instance method
        if (class_exists('HVAC_Community_Events')) {
            $hvac = HVAC_Community_Events::get_instance();
            if (method_exists($hvac, 'render_master_dashboard')) {
                return $debug . $hvac->render_master_dashboard();
            }
        }
        
        // Fallback if class not available
        if (!is_user_logged_in()) {
            return $debug . '<p>' . __('Please log in to view the master dashboard.', 'hvac-community-events') . '</p>';
        }
        
        $user = wp_get_current_user();
        if (!in_array('hvac_master_trainer', $user->roles) && !current_user_can('manage_options')) {
            return $debug . '<div class="hvac-error">' . __('You do not have permission to view the master dashboard. This dashboard is only available to Master Trainers and Administrators.', 'hvac-community-events') . '</div>';
        }
        
        // Include the master dashboard template
        ob_start();
        include HVAC_PLUGIN_DIR . 'templates/template-hvac-master-dashboard.php';
        return ob_get_clean();
    }
    
    /**
     * Render manage event shortcode
     * 
     * @param array $atts Shortcode attributes
     * @return string
     */
    public function render_manage_event($atts = array()) {
        // The manage event page uses The Events Calendar Community Events shortcode
        if (!shortcode_exists('tribe_community_events')) {
            return '<p>' . __('Event management requires The Events Calendar Community Events add-on.', 'hvac-community-events') . '</p>';
        }
        
        // Get event ID from URL parameter to determine if we're creating or editing
        $event_id = isset($_GET['event_id']) ? intval($_GET['event_id']) : null;
        
        if ($event_id && $event_id > 0) {
            // Editing existing event - use edit_event view with event ID
            // This is the proper TEC way to edit events with full field population
            return do_shortcode('[tribe_community_events view="edit_event" id="' . $event_id . '"]');
        } else {
            // Creating new event - use submission_form view
            return do_shortcode('[tribe_community_events view="submission_form"]');
        }
    }
    
    /**
     * Render create event shortcode using native HVAC Event Form Builder
     *
     * @param array $atts Shortcode attributes
     * @return string
     */
    public function render_create_event($atts = array()) {
        // Check permissions
        if (!is_user_logged_in()) {
            return '<div class="hvac-error-message"><p>' . __('Please log in to create events.', 'hvac-community-events') . '</p></div>';
        }

        $user = wp_get_current_user();
        if (!array_intersect(['hvac_trainer', 'hvac_master_trainer'], $user->roles) && !current_user_can('manage_options')) {
            return '<div class="hvac-error-message"><p>' . __('You must be a trainer to create events.', 'hvac-community-events') . '</p></div>';
        }

        // Parse shortcode attributes
        $atts = shortcode_atts(array(
            'include_templates' => 'true',
            'template_categories' => 'general,training,workshop,certification',
            'show_navigation' => 'true'
        ), $atts);

        // Start output buffering
        ob_start();

        try {
            // Initialize HVAC Event Form Builder
            if (class_exists('HVAC_Event_Form_Builder')) {
                $form_builder = new HVAC_Event_Form_Builder('hvac_event_form', $atts['include_templates'] === 'true');

                $template_categories = explode(',', $atts['template_categories']);
                $template_categories = array_map('trim', $template_categories);

                $form_builder->create_event_form([
                    'include_template_selector' => ($atts['include_templates'] === 'true'),
                    'include_venue_fields' => true,
                    'include_organizer_fields' => true,
                    'include_cost_fields' => true,
                    'include_capacity_fields' => true,
                    'include_datetime_fields' => true,
                    'template_categories' => $template_categories
                ]);

                ?>
                <div class="hvac-shortcode-create-event">
                    <?php if ($atts['show_navigation'] === 'true'): ?>
                        <div class="hvac-navigation-header">
                            <?php
                            // Display trainer navigation menu
                            if (class_exists('HVAC_Menu_System')) {
                                echo '<div class="hvac-navigation-wrapper">';
                                HVAC_Menu_System::instance()->render_trainer_menu();
                                echo '</div>';
                            }

                            // Display breadcrumbs
                            if (class_exists('HVAC_Breadcrumbs')) {
                                echo '<div class="hvac-breadcrumbs-wrapper">';
                                HVAC_Breadcrumbs::instance()->render();
                                echo '</div>';
                            }
                            ?>
                        </div>
                    <?php endif; ?>

                    <div class="hvac-form-header">
                        <h2>Create New Training Event</h2>
                        <div class="hvac-form-notice">
                            <p><strong>✓ Phase 2 Native Implementation</strong> - Using HVAC Event Form Builder with template system integration</p>
                        </div>
                    </div>

                    <div class="hvac-form-container">
                        <?php
                        // Display any success/error messages
                        if (isset($_GET['success'])) {
                            echo '<div class="hvac-success-message">Event created successfully!</div>';
                        }
                        if (isset($_GET['error'])) {
                            echo '<div class="hvac-error-message">Error creating event. Please try again.</div>';
                        }

                        // Render the form
                        echo $form_builder->render();
                        ?>
                    </div>
                </div>

                <style>
                .hvac-shortcode-create-event {
                    max-width: 100%;
                    margin: 0;
                }

                .hvac-form-header {
                    margin-bottom: 30px;
                }

                .hvac-form-header h2 {
                    color: #0073aa;
                    font-size: 24px;
                    margin-bottom: 10px;
                }

                .hvac-form-notice {
                    background: #e8f5e8;
                    border: 1px solid #4CAF50;
                    border-radius: 4px;
                    padding: 12px;
                    margin-bottom: 20px;
                }

                .hvac-form-notice p {
                    margin: 0;
                    color: #2e7d2e;
                }

                .hvac-form-container {
                    background: #fff;
                    padding: 30px;
                    border-radius: 8px;
                    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
                }

                .hvac-success-message {
                    background: #d4edda;
                    border: 1px solid #c3e6cb;
                    border-radius: 4px;
                    padding: 15px;
                    margin-bottom: 20px;
                    color: #155724;
                }

                .hvac-error-message {
                    background: #f8d7da;
                    border: 1px solid #f5c6cb;
                    border-radius: 4px;
                    padding: 15px;
                    margin-bottom: 20px;
                    color: #721c24;
                }

                .hvac-navigation-header {
                    margin-bottom: 20px;
                }
                </style>

                <script>
                jQuery(document).ready(function($) {
                    // Form enhancement script for shortcode usage
                    console.log('[HVAC Create Event Shortcode] Form loaded with native implementation');

                    // Template selector functionality
                    $('#hvac-template-selector').on('change', function() {
                        const templateId = $(this).val();
                        if (templateId) {
                            $.ajax({
                                url: ajaxurl || '/wp-admin/admin-ajax.php',
                                type: 'POST',
                                data: {
                                    action: 'hvac_load_template_data',
                                    template_id: templateId,
                                    nonce: $('[name="hvac_event_form_nonce"]').val()
                                },
                                success: function(response) {
                                    if (response.success && response.data) {
                                        Object.keys(response.data).forEach(function(field) {
                                            const $field = $('[name="' + field + '"]');
                                            if ($field.length) {
                                                $field.val(response.data[field]);
                                            }
                                        });
                                    }
                                },
                                error: function() {
                                    console.log('Error loading template data');
                                }
                            });
                        }
                    });
                });
                </script>
                <?php
            } else {
                ?>
                <div class="hvac-error-message">
                    <p><strong>Form Builder Not Available</strong></p>
                    <p>The HVAC Event Form Builder class is not loaded. Please ensure the plugin is properly activated.</p>
                </div>
                <?php
            }
        } catch (Exception $e) {
            ?>
            <div class="hvac-error-message">
                <p><strong>Form Loading Error</strong></p>
                <p>There was an error loading the event creation form: <?php echo esc_html($e->getMessage()); ?></p>
            </div>
            <?php
        }

        return ob_get_clean();
    }
    
    // NOTE: render_edit_event method removed - handled by HVAC_Edit_Event_Shortcode class
    
    /**
     * Render event summary shortcode
     * 
     * @param array $atts Shortcode attributes
     * @return string
     */
    public function render_event_summary($atts = array()) {
        if (!class_exists('HVAC_Event_Summary')) {
            return '<p>' . __('Event summary functionality not available.', 'hvac-community-events') . '</p>';
        }
        
        $event_summary = new HVAC_Event_Summary();
        return $event_summary->render_summary($atts);
    }
    
    /**
     * Render login shortcode
     * 
     * @param array $atts Shortcode attributes
     * @return string
     */
    public function render_login($atts = array()) {
        if (!class_exists('\\HVAC_Community_Events\\Community\\Login_Handler')) {
            return '<p>' . __('Login functionality not available.', 'hvac-community-events') . '</p>';
        }
        
        $login_handler = new \HVAC_Community_Events\Community\Login_Handler();
        return $login_handler->render_login_form($atts);
    }
    
    /**
     * Render registration shortcode
     * 
     * @param array $atts Shortcode attributes
     * @return string
     */
    public function render_registration($atts = array()) {
        // Dependencies are loaded during plugin initialization - no need for conditional require_once
        if (!class_exists('HVAC_Registration')) {
            return '<p>' . __('Registration functionality not available.', 'hvac-community-events') . '</p>';
        }
        
        $registration = new HVAC_Registration();
        return $registration->render_registration_form($atts);
    }
    
    /**
     * Render edit profile shortcode
     * 
     * @param array $atts Shortcode attributes
     * @return string
     */
    public function render_edit_profile($atts = array()) {
        if (!class_exists('HVAC_Registration')) {
            return '<p>' . __('Profile editing functionality not available.', 'hvac-community-events') . '</p>';
        }
        
        $registration = new HVAC_Registration();
        return $registration->render_edit_profile_form($atts);
    }
    
    /**
     * Render trainer profile shortcode
     * 
     * @param array $atts Shortcode attributes
     * @return string
     */
    public function render_trainer_profile($atts = array()) {
        if (!class_exists('HVAC_Trainer_Profile')) {
            return '<p>' . __('Profile functionality not available.', 'hvac-community-events') . '</p>';
        }
        
        $trainer_profile = new HVAC_Trainer_Profile();
        return $trainer_profile->render_profile($atts);
    }
    
    /**
     * Render certificate reports shortcode
     * 
     * @param array $atts Shortcode attributes
     * @return string
     */
    public function render_certificate_reports($atts = array()) {
        // Check permissions
        if (!is_user_logged_in()) {
            return '<p>' . __('Please log in to view certificate reports.', 'hvac-community-events') . '</p>';
        }
        
        // Allow trainers, master trainers, or WordPress admins
        if (!current_user_can('hvac_trainer') && !current_user_can('hvac_master_trainer') && !current_user_can('manage_options')) {
            return '<p>' . __('You must be a trainer to access this page.', 'hvac-community-events') . '</p>';
        }
        
        // Use output buffering to capture template output properly
        ob_start();
        
        // Set flag to prevent template from echoing directly  
        define('HVAC_SHORTCODE_CONTEXT', true);
        
        include HVAC_PLUGIN_DIR . 'templates/certificates/certificate-reports-content.php';
        
        $content = ob_get_clean();
        
        // Return the content for embedding in the WordPress template
        return $content;
    }
    
    /**
     * Render generate certificates shortcode
     * 
     * @param array $atts Shortcode attributes
     * @return string
     */
    public function render_generate_certificates($atts = array()) {
        // Check permissions
        if (!is_user_logged_in()) {
            return '<p>' . __('Please log in to generate certificates.', 'hvac-community-events') . '</p>';
        }
        
        // Allow trainers, master trainers, or WordPress admins
        if (!current_user_can('hvac_trainer') && !current_user_can('hvac_master_trainer') && !current_user_can('manage_options')) {
            return '<p>' . __('You must be a trainer to access this page.', 'hvac-community-events') . '</p>';
        }
        
        // Include the generate certificates content template
        ob_start();
        include HVAC_PLUGIN_DIR . 'templates/certificates/generate-certificates-content.php';
        return ob_get_clean();
    }
    
    /**
     * Render email attendees shortcode
     * 
     * @param array $atts Shortcode attributes
     * @return string
     */
    public function render_email_attendees($atts = array()) {
        // Check if user has appropriate permissions
        // Allow trainers, master trainers, or WordPress admins
        if (!current_user_can('hvac_trainer') && !current_user_can('hvac_master_trainer') && !current_user_can('manage_options')) {
            return '<p>' . __('You must be a trainer to access this page.', 'hvac-community-events') . '</p>';
        }
        
        ob_start();
        include HVAC_PLUGIN_DIR . 'templates/email-attendees.php';
        return ob_get_clean();
    }
    
    /**
     * Render communication templates shortcode
     * 
     * @param array $atts Shortcode attributes
     * @return string
     */
    public function render_communication_templates($atts = array()) {
        if (!class_exists('HVAC_Trainer_Communication_Templates')) {
            return '<p>' . __('Communication templates functionality not available.', 'hvac-community-events') . '</p>';
        }
        
        // Use the new trainer communication templates class for read-only access
        return HVAC_Trainer_Communication_Templates::instance()->render_templates_interface();
    }
    
    /**
     * Render communication schedules shortcode
     * 
     * @param array $atts Shortcode attributes
     * @return string
     */
    public function render_communication_schedules($atts = array()) {
        if (!class_exists('HVAC_Communication_Scheduler')) {
            return '<p>' . __('Communication scheduler functionality not available.', 'hvac-community-events') . '</p>';
        }
        
        // Check permissions
        if (!current_user_can('edit_tribe_events') && !current_user_can('manage_options')) {
            return '<p>' . __('You do not have permission to access this page.', 'hvac-community-events') . '</p>';
        }
        
        $scheduler = hvac_communication_scheduler();
        
        ob_start();
        $scheduler->render_schedules_page();
        return ob_get_clean();
    }
    
    /**
     * Render Google Sheets admin shortcode
     * 
     * @param array $atts Shortcode attributes
     * @return string
     */
    public function render_google_sheets_admin($atts = array()) {
        if (!class_exists('HVAC_Google_Sheets_Admin')) {
            return '<p>' . __('Google Sheets functionality not available.', 'hvac-community-events') . '</p>';
        }
        
        // Check permissions
        if (!current_user_can('manage_options') && !current_user_can('view_all_trainer_data')) {
            return '<p>' . __('You do not have permission to access this page.', 'hvac-community-events') . '</p>';
        }
        
        $google_sheets = new HVAC_Google_Sheets_Admin();
        
        ob_start();
        $google_sheets->render_admin_page();
        return ob_get_clean();
    }
    
    /**
     * Render venues list shortcode
     * 
     * @param array $atts Shortcode attributes
     * @return string
     */
    public function render_venues_list($atts = array()) {
        // Check permissions
        if (!is_user_logged_in()) {
            return '<p>' . __('Please log in to view venues.', 'hvac-community-events') . '</p>';
        }
        
        // Allow trainers, master trainers, or WordPress admins
        if (!current_user_can('hvac_trainer') && !current_user_can('hvac_master_trainer') && !current_user_can('manage_options')) {
            return '<p>' . __('You must be a trainer to access this page.', 'hvac-community-events') . '</p>';
        }
        
        if (!class_exists('HVAC_Venues')) {
            return '<p>' . __('Venues functionality not available.', 'hvac-community-events') . '</p>';
        }
        
        return HVAC_Venues::instance()->render_venues_list($atts);
    }
    
    /**
     * Render venue manage shortcode
     * 
     * @param array $atts Shortcode attributes
     * @return string
     */
    public function render_venue_manage($atts = array()) {
        // Check permissions
        if (!is_user_logged_in()) {
            return '<p>' . __('Please log in to manage venues.', 'hvac-community-events') . '</p>';
        }
        
        // Allow trainers, master trainers, or WordPress admins
        if (!current_user_can('hvac_trainer') && !current_user_can('hvac_master_trainer') && !current_user_can('manage_options')) {
            return '<p>' . __('You must be a trainer to access this page.', 'hvac-community-events') . '</p>';
        }
        
        if (!class_exists('HVAC_Venues')) {
            return '<p>' . __('Venues functionality not available.', 'hvac-community-events') . '</p>';
        }
        
        return HVAC_Venues::instance()->render_venue_manage($atts);
    }
    
    /**
     * Render organizers list shortcode
     * 
     * @param array $atts Shortcode attributes
     * @return string
     */
    public function render_organizers_list($atts = array()) {
        // Check permissions
        if (!is_user_logged_in()) {
            return '<p>' . __('Please log in to view organizers.', 'hvac-community-events') . '</p>';
        }
        
        // Allow trainers, master trainers, or WordPress admins
        if (!current_user_can('hvac_trainer') && !current_user_can('hvac_master_trainer') && !current_user_can('manage_options')) {
            return '<p>' . __('You must be a trainer to access this page.', 'hvac-community-events') . '</p>';
        }
        
        if (!class_exists('HVAC_Organizers')) {
            return '<p>' . __('Organizers functionality not available.', 'hvac-community-events') . '</p>';
        }
        
        $organizers = HVAC_Organizers::instance();
        return $organizers->render_organizers_list($atts);
    }
    
    /**
     * Render organizer manage shortcode
     * 
     * @param array $atts Shortcode attributes
     * @return string
     */
    public function render_organizer_manage($atts = array()) {
        // Check permissions
        if (!is_user_logged_in()) {
            return '<p>' . __('Please log in to manage organizers.', 'hvac-community-events') . '</p>';
        }
        
        // Allow trainers, master trainers, or WordPress admins
        if (!current_user_can('hvac_trainer') && !current_user_can('hvac_master_trainer') && !current_user_can('manage_options')) {
            return '<p>' . __('You must be a trainer to access this page.', 'hvac-community-events') . '</p>';
        }
        
        if (!class_exists('HVAC_Organizers')) {
            return '<p>' . __('Organizers functionality not available.', 'hvac-community-events') . '</p>';
        }
        
        $organizers = HVAC_Organizers::instance();
        return $organizers->render_organizer_manage($atts);
    }
    
    /**
     * Render trainer profile view shortcode
     * 
     * @param array $atts Shortcode attributes
     * @return string
     */
    public function render_trainer_profile_view($atts = array()) {
        // Check permissions
        if (!is_user_logged_in()) {
            return '<p>' . __('Please log in to view your profile.', 'hvac-community-events') . '</p>';
        }
        
        // Allow trainers, master trainers, or WordPress admins
        if (!current_user_can('hvac_trainer') && !current_user_can('hvac_master_trainer') && !current_user_can('manage_options')) {
            return '<p>' . __('You must be a trainer to access this page.', 'hvac-community-events') . '</p>';
        }
        
        if (!class_exists('HVAC_Trainer_Profile_Manager')) {
            return '<p>' . __('Profile functionality not available.', 'hvac-community-events') . '</p>';
        }
        
        $profile_manager = HVAC_Trainer_Profile_Manager::get_instance();
        return $profile_manager->render_profile_view($atts);
    }
    
    /**
     * Render trainer profile edit shortcode
     * 
     * @param array $atts Shortcode attributes
     * @return string
     */
    public function render_trainer_profile_edit($atts = array()) {
        // Check permissions
        if (!is_user_logged_in()) {
            return '<p>' . __('Please log in to edit your profile.', 'hvac-community-events') . '</p>';
        }
        
        // Allow trainers, master trainers, or WordPress admins
        if (!current_user_can('hvac_trainer') && !current_user_can('hvac_master_trainer') && !current_user_can('manage_options')) {
            return '<p>' . __('You must be a trainer to access this page.', 'hvac-community-events') . '</p>';
        }
        
        if (!class_exists('HVAC_Trainer_Profile_Manager')) {
            return '<p>' . __('Profile functionality not available.', 'hvac-community-events') . '</p>';
        }
        
        $profile_manager = HVAC_Trainer_Profile_Manager::get_instance();
        return $profile_manager->render_profile_edit($atts);
    }

    /**
     * Register AJAX handlers
     */
    private function register_ajax_handlers() {
        // Template preview AJAX handler
        add_action('wp_ajax_hvac_get_template_preview', array($this, 'ajax_get_template_preview'));
        add_action('wp_ajax_nopriv_hvac_get_template_preview', array($this, 'ajax_get_template_preview'));

        // Template loading AJAX handler
        add_action('wp_ajax_hvac_load_template_data', array($this, 'ajax_load_template_data'));
        add_action('wp_ajax_nopriv_hvac_load_template_data', array($this, 'ajax_load_template_data'));

        // Template saving AJAX handler
        add_action('wp_ajax_hvac_save_template', array($this, 'ajax_save_template'));
        add_action('wp_ajax_nopriv_hvac_save_template', array($this, 'ajax_save_template'));
    }

    /**
     * AJAX handler for getting template preview data
     */
    public function ajax_get_template_preview() {
        // Verify nonce
        if (!wp_verify_nonce($_POST['nonce'] ?? '', 'hvac_event_form_nonce')) {
            wp_send_json_error('Security check failed');
            return;
        }

        $template_id = sanitize_text_field($_POST['template_id'] ?? '');
        if (empty($template_id)) {
            wp_send_json_error('No template ID provided');
            return;
        }

        // Get template manager instance
        if (!class_exists('HVAC_Event_Template_Manager')) {
            wp_send_json_error('Template manager not available');
            return;
        }

        $template_manager = HVAC_Event_Template_Manager::instance();
        $template = $template_manager->get_template($template_id);

        if (!$template) {
            wp_send_json_error('Template not found');
            return;
        }

        // Return template data
        wp_send_json_success($template);
    }

    /**
     * AJAX handler for loading template data into form
     */
    public function ajax_load_template_data() {
        // Verify nonce
        if (!wp_verify_nonce($_POST['nonce'] ?? '', 'hvac_event_form_nonce')) {
            wp_send_json_error('Security check failed');
            return;
        }

        $template_id = sanitize_text_field($_POST['template_id'] ?? '');
        if (empty($template_id)) {
            wp_send_json_error('No template ID provided');
            return;
        }

        // Get template manager instance
        if (!class_exists('HVAC_Event_Template_Manager')) {
            wp_send_json_error('Template manager not available');
            return;
        }

        $template_manager = HVAC_Event_Template_Manager::instance();
        $template = $template_manager->get_template($template_id);

        if (!$template || empty($template['field_data'])) {
            wp_send_json_error('Template data not found');
            return;
        }

        // Return field data
        wp_send_json_success($template['field_data']);
    }

    /**
     * AJAX handler for saving new template
     */
    public function ajax_save_template() {
        // Verify nonce
        if (!wp_verify_nonce($_POST['nonce'] ?? '', 'hvac_event_form_nonce')) {
            wp_send_json_error('Security check failed');
            return;
        }

        // Check user permissions
        if (!is_user_logged_in()) {
            wp_send_json_error('Authentication required');
            return;
        }

        $user = wp_get_current_user();
        if (!array_intersect(['hvac_trainer', 'hvac_master_trainer'], $user->roles) && !current_user_can('manage_options')) {
            wp_send_json_error('Insufficient permissions');
            return;
        }

        // Validate and sanitize input
        $template_name = sanitize_text_field($_POST['template_name'] ?? '');
        $template_description = sanitize_textarea_field($_POST['template_description'] ?? '');
        $template_category = sanitize_text_field($_POST['template_category'] ?? '');
        $is_public = (bool) ($_POST['is_public'] ?? false);
        $field_data = $_POST['field_data'] ?? [];

        if (empty($template_name)) {
            wp_send_json_error('Template name is required');
            return;
        }

        if (empty($template_category)) {
            wp_send_json_error('Template category is required');
            return;
        }

        // Sanitize field data
        $sanitized_field_data = [];
        foreach ($field_data as $key => $value) {
            $sanitized_key = sanitize_key($key);
            if (is_array($value)) {
                $sanitized_field_data[$sanitized_key] = array_map('sanitize_text_field', $value);
            } else {
                $sanitized_field_data[$sanitized_key] = sanitize_text_field($value);
            }
        }

        // Get template manager instance
        if (!class_exists('HVAC_Event_Template_Manager')) {
            wp_send_json_error('Template manager not available');
            return;
        }

        $template_manager = HVAC_Event_Template_Manager::instance();

        // Prepare template data
        $template_data = [
            'name' => $template_name,
            'description' => $template_description,
            'category' => $template_category,
            'is_public' => $is_public,
            'field_data' => $sanitized_field_data,
            'created_by' => $user->ID,
            'meta_data' => [
                'source' => 'event_form',
                'created_at' => current_time('mysql'),
                'user_ip' => $_SERVER['REMOTE_ADDR'] ?? '',
            ]
        ];

        // Create the template
        $result = $template_manager->create_template($template_data);

        if ($result['success']) {
            wp_send_json_success([
                'message' => 'Template saved successfully',
                'template_id' => $result['template_id'] ?? null
            ]);
        } else {
            wp_send_json_error($result['error'] ?? 'Failed to save template');
        }
    }
}