<?php
/**
 * Main plugin class for HVAC Community Events
 */

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

class HVAC_Community_Events {
	/**
	 * The single instance of the class
	 */
	private static $instance = null;

	/**
	 * Main instance
	 */
	public static function instance() {
		if (is_null(self::$instance)) {
			self::$instance = new self();
		}
		return self::$instance;
	}

	/**
	 * Constructor
	 */
	public function __construct() {
	    HVAC_Logger::info('HVAC_Community_Events constructor started', 'Core');
	    $this->define_constants();
	    HVAC_Logger::info('Constants defined', 'Core');
	    $this->includes();
	    HVAC_Logger::info('Includes completed', 'Core');
	    $this->init_hooks();
	    HVAC_Logger::info('Hooks initialized', 'Core');
	}

	/**
	 * Define constants
	 */
	private function define_constants() {
		// Additional constants can be defined here
	}

	/**
	 * Include required files
	 */
	private function includes() {
	    HVAC_Logger::info('Loading required files', 'Core');
	    $files_to_include = [
	        'class-hvac-roles.php',
	        'class-hvac-registration.php',
	        'class-hvac-settings.php',
	        'community/class-login-handler.php',
	        'community/class-event-handler.php',
	        'class-hvac-dashboard-data.php',
	        'class-event-form-handler.php',     // Add our form handler
	        'class-event-author-fixer.php',     // Fix event author assignment
	        'class-hvac-dashboard.php',         // New dashboard handler
	        'certificates/class-certificate-installer.php',  // Certificate database installer
	        'certificates/class-certificate-manager.php',    // Certificate management
	        'certificates/class-certificate-generator.php',  // Certificate generation
	        'certificates/class-certificate-settings.php',   // Certificate settings
	        'certificates/class-certificate-template.php',   // Certificate template
	        'certificates/class-certificate-security.php',   // Certificate security
	        'certificates/class-certificate-ajax-handler.php', // Certificate AJAX handling
	        'community/class-email-debug.php'    // Email debugging tools
	    ];
	    // Make sure Login_Handler is loaded first for shortcode registration
	    $login_handler_path = HVAC_CE_PLUGIN_DIR . 'includes/community/class-login-handler.php';
	    if (file_exists($login_handler_path)) {
	        require_once $login_handler_path;
	        HVAC_Logger::info("Included file: community/class-login-handler.php", 'Core');
	    }
	    
	    foreach ($files_to_include as $file) {
	        // Skip Login_Handler as we've already loaded it
	        if ($file === 'community/class-login-handler.php') {
	            continue;
	        }
	        
	        $path = HVAC_CE_PLUGIN_DIR . 'includes/' . $file;
	        if (file_exists($path)) {
	            require_once $path;
	            HVAC_Logger::info("Included file: {$file}", 'Core');
	        } else {
	            HVAC_Logger::error("Failed to include file: {$file} - File not found", 'Core');
	        }
	    }
	    
	    // Load Zoho integration if in admin
	    if (is_admin()) {
	        $zoho_path = HVAC_CE_PLUGIN_DIR . 'includes/admin/class-zoho-admin.php';
	        if (file_exists($zoho_path)) {
	            require_once $zoho_path;
	            HVAC_Logger::info("Included Zoho admin interface", 'Core');
	        }
	    }
	    
	    HVAC_Logger::info('All required files loaded', 'Core');
	}

	/**
	 * Initialize hooks
	 */
	private function init_hooks() {
		// Register activation/deactivation hooks
		// Note: These hooks are typically registered outside the class instance context
		// register_activation_hook(__FILE__, array($this, 'activate')); // This won't work correctly here
		// register_deactivation_hook(__FILE__, array($this, 'deactivate')); // This won't work correctly here

		// Initialize other hooks
		add_action('init', array($this, 'init'));

		// Template loading for custom pages
		add_filter('template_include', array($this, 'load_custom_templates'));
		
		// Add authentication check for event summary page
		add_action('template_redirect', array($this, 'check_event_summary_auth'));
		
		// Add authentication check for email attendees page
		add_action('template_redirect', array($this, 'check_email_attendees_auth'));
		
		// Add authentication check for certificate pages
		add_action('template_redirect', array($this, 'check_certificate_pages_auth'));
	} // End init_hooks
	
	/**
	 * Check authentication for event summary page
	 */
	public function check_event_summary_auth() {
		// Check if we're on the event-summary page
		if (is_page('event-summary') && !is_user_logged_in()) {
			// Redirect to login page
			wp_redirect(home_url('/community-login/?redirect_to=' . urlencode($_SERVER['REQUEST_URI'])));
			exit;
		}
	}
	
	/**
	 * Check authentication for email attendees page
	 */
	public function check_email_attendees_auth() {
		// Check if we're on the email-attendees page
		if (is_page('email-attendees') && !is_user_logged_in()) {
			// Redirect to login page
			wp_redirect(home_url('/community-login/?redirect_to=' . urlencode($_SERVER['REQUEST_URI'])));
			exit;
		}
	}

	/**
	 * Check authentication for certificate pages
	 */
	public function check_certificate_pages_auth() {
		// Check if we're on certificate-related pages
		if ((is_page('certificate-reports') || is_page('generate-certificates')) && !is_user_logged_in()) {
			// Redirect to login page
			wp_redirect(home_url('/community-login/?redirect_to=' . urlencode($_SERVER['REQUEST_URI'])));
			exit;
		}
	}

	/**
	 * Plugin activation (Should be called statically or from the main plugin file context)
	 */
	public static function activate() {
		// Activation code here (e.g., page creation, role creation)
		// Note: This method might need to be moved or called differently
	}

	/**
	 * Plugin deactivation (Should be called statically or from the main plugin file context)
	 */
	public static function deactivate() {
		// Remove the hvac_trainer role
		require_once HVAC_CE_PLUGIN_DIR . 'includes/class-hvac-roles.php'; // Ensure class is available
		HVAC_Roles::remove_hvac_trainer_role();
		HVAC_Logger::info('Deactivation completed: HVAC trainer role removed.', 'Core');
	}

	/**
	 * Initialize function (hooked on 'init')
	 */
	public function init() {
		// Initialize roles
		$this->init_roles();
		
		// Initialize settings (admin menu)
		$this->init_settings();
		
		// Initialize Zoho admin if in admin
		if (is_admin()) {
			$this->init_zoho_admin();
			$this->init_admin_dashboard();
		}
		
		// Initialize forms
		$this->init_forms();
		
		// Initialize shortcodes
		$this->init_shortcodes();
		
		// Initialize certificate AJAX handler
		if (class_exists('HVAC_Certificate_AJAX_Handler')) {
			HVAC_Certificate_AJAX_Handler::instance();
		}
		
		// Initialize event form handler
		if (class_exists('HVAC_Community_Events\Event_Form_Handler')) {
			new \HVAC_Community_Events\Event_Form_Handler();
		}
	}

	/**
	 * Initialize roles
	 */
	private function init_roles() {
		$roles = new HVAC_Roles();
		// Note: Role creation is handled in the activate method or the class constructor
	}
	
	/**
	 * Initialize settings
	 */
	private function init_settings() {
		new HVAC_Settings();
	}
	
	/**
	 * Initialize Zoho admin
	 */
	private function init_zoho_admin() {
		if (file_exists(HVAC_CE_PLUGIN_DIR . 'includes/admin/class-zoho-admin.php')) {
			require_once HVAC_CE_PLUGIN_DIR . 'includes/admin/class-zoho-admin.php';
			new HVAC_Zoho_Admin();
		}
	}
	
	/**
	 * Initialize admin dashboard
	 */
	private function init_admin_dashboard() {
		if (file_exists(HVAC_CE_PLUGIN_DIR . 'includes/admin/class-admin-dashboard.php')) {
			require_once HVAC_CE_PLUGIN_DIR . 'includes/admin/class-admin-dashboard.php';
			new HVAC_Admin_Dashboard();
		}
	}

	/**
	 * Initialize forms
	 */
	private function init_forms() {
		$registration = new HVAC_Registration();
		// Note: Form registration is handled in the class constructor
	}

	/**
	 * Initialize shortcodes
	 */
	private function init_shortcodes() {
		// Registration form shortcode
		add_shortcode('hvac_trainer_registration', array('HVAC_Registration', 'render_registration_form'));

		// Community login shortcode - initialize Login_Handler to register the shortcode
		new \HVAC_Community_Events\Community\Login_Handler();

		// Dashboard shortcode
		add_shortcode('hvac_dashboard', array($this, 'render_dashboard'));
		
		// Add the event summary shortcode
		add_shortcode('hvac_event_summary', array($this, 'render_event_summary'));

		// Add trainer profile shortcode
		add_shortcode('hvac_trainer_profile', array($this, 'render_trainer_profile'));
		
		// Add edit profile shortcode
		add_shortcode('hvac_edit_profile', array('HVAC_Registration', 'render_edit_profile_form'));

		// Add email attendees shortcode
		add_shortcode('hvac_email_attendees', array($this, 'render_email_attendees'));

		// Add certificate reports shortcode
		add_shortcode('hvac_certificate_reports', array($this, 'render_certificate_reports'));

		// Add generate certificates shortcode
		add_shortcode('hvac_generate_certificates', array($this, 'render_generate_certificates'));

		// Remove the event form shortcode as we're using TEC's shortcode instead
		// add_shortcode('hvac_event_form', array('HVAC_Community_Event_Handler', 'render_event_form'));

		// Add future shortcodes here
	}

	/**
	 * Render dashboard content
	 */
	public function render_dashboard() {
		if (!is_user_logged_in()) {
			return '<p>Please log in to view the dashboard.</p>';
		}

		// Include the dashboard template
		ob_start();
		include HVAC_CE_PLUGIN_DIR . 'templates/template-hvac-dashboard.php';
		return ob_get_clean();
	}
	
	/**
	 * Render event summary content
	 */
	public function render_event_summary() {
		// Check if user is logged in
		if (!is_user_logged_in()) {
			return '<p>Please log in to view the event summary.</p>';
		}
		
		// Get event ID from URL parameter
		$event_id = isset($_GET['event_id']) ? absint($_GET['event_id']) : 0;
		
		if ($event_id <= 0) {
			return '<div class="hvac-error">No event ID provided. Please access this page from your dashboard.</div>';
		}
		
		// Check if the event exists and user has permission to view it
		$event = get_post($event_id);
		if (!$event || get_post_type($event) !== Tribe__Events__Main::POSTTYPE) {
			return '<div class="hvac-error">Event not found or invalid.</div>';
		}
		
		// Check if the current user has permission to view this event
		// For now, we'll check if they're the post author or have edit_posts capability
		if ($event->post_author != get_current_user_id() && !current_user_can('edit_posts')) {
			return '<div class="hvac-error">You do not have permission to view this event summary.</div>';
		}
		
		// Include the event summary template
		ob_start();
		include HVAC_CE_PLUGIN_DIR . 'templates/event-summary/template-event-summary.php';
		return ob_get_clean();
	}
	
	/**
	 * Render trainer profile content
	 */
	public function render_trainer_profile() {
		if (!is_user_logged_in()) {
			return '<p>Please log in to view your profile.</p>';
		}

		// Include the trainer profile template
		ob_start();
		include HVAC_CE_PLUGIN_DIR . 'templates/template-trainer-profile.php';
		return ob_get_clean();
	}
	
	/**
	 * Render email attendees content
	 */
	public function render_email_attendees() {
		// Check if user is logged in
		if (!is_user_logged_in()) {
			return '<p>Please log in to email event attendees.</p>';
		}
		
		// Get event ID from URL parameter
		$event_id = isset($_GET['event_id']) ? absint($_GET['event_id']) : 0;
		
		if ($event_id <= 0) {
			return '<div class="hvac-error">No event ID provided. Please access this page from your dashboard or event summary page.</div>';
		}
		
		// Check if the event exists and user has permission to view it
		$event = get_post($event_id);
		if (!$event || get_post_type($event) !== Tribe__Events__Main::POSTTYPE) {
			return '<div class="hvac-error">Event not found or invalid.</div>';
		}
		
		// Check if the current user has permission to view this event
		// For now, we'll check if they're the post author or have edit_posts capability
		if ($event->post_author != get_current_user_id() && !current_user_can('edit_posts')) {
			return '<div class="hvac-error">You do not have permission to email attendees for this event.</div>';
		}
		
		// Include the email attendees template
		ob_start();
		include HVAC_CE_PLUGIN_DIR . 'templates/email-attendees/template-email-attendees.php';
		return ob_get_clean();
	}

	/**
	 * Render certificate reports content
	 */
	public function render_certificate_reports() {
		// Check if user is logged in
		if (!is_user_logged_in()) {
			return '<p>Please log in to view certificate reports.</p>';
		}
		
		// Check if the current user has permission to view certificate reports
		// For now, we'll check if they're a trainer or have edit_posts capability
		if (!current_user_can('hvac_trainer') && !current_user_can('edit_posts')) {
			return '<div class="hvac-error">You do not have permission to view certificate reports.</div>';
		}
		
		// Make sure certificate manager is loaded
		require_once HVAC_CE_PLUGIN_DIR . 'includes/certificates/class-certificate-manager.php';
		
		// Make sure certificate security is loaded
		require_once HVAC_CE_PLUGIN_DIR . 'includes/certificates/class-certificate-security.php';
		
		// Include the certificate reports template with error handling
		try {
			ob_start();
			include HVAC_CE_PLUGIN_DIR . 'templates/certificates/template-certificate-reports.php';
			return ob_get_clean();
		} catch (Exception $e) {
			return '<div class="hvac-error">Error loading certificate reports: ' . esc_html($e->getMessage()) . '</div>';
		}
	}

	/**
	 * Render generate certificates content
	 */
	public function render_generate_certificates() {
		// Check if user is logged in
		if (!is_user_logged_in()) {
			return '<p>Please log in to generate certificates.</p>';
		}
		
		// Get event ID from URL parameter if available
		$event_id = isset($_GET['event_id']) ? absint($_GET['event_id']) : 0;
		
		// Check if the event exists and user has permission to view it when event_id is provided
		if ($event_id > 0) {
			$event = get_post($event_id);
			if (!$event || get_post_type($event) !== Tribe__Events__Main::POSTTYPE) {
				return '<div class="hvac-error">Event not found or invalid.</div>';
			}
			
			// Check if the current user has permission to view this event
			if ($event->post_author != get_current_user_id() && !current_user_can('edit_posts')) {
				return '<div class="hvac-error">You do not have permission to generate certificates for this event.</div>';
			}
		} else {
			// If no event ID is provided, check general permissions
			if (!current_user_can('hvac_trainer') && !current_user_can('edit_posts')) {
				return '<div class="hvac-error">You do not have permission to generate certificates.</div>';
			}
		}
		
		// Make sure certificate manager is loaded
		require_once HVAC_CE_PLUGIN_DIR . 'includes/certificates/class-certificate-manager.php';
		
		// Make sure certificate security is loaded
		require_once HVAC_CE_PLUGIN_DIR . 'includes/certificates/class-certificate-security.php';
		
		// Make sure certificate generator is loaded
		require_once HVAC_CE_PLUGIN_DIR . 'includes/certificates/class-certificate-generator.php';
		
		// Include the generate certificates template with error handling
		try {
			ob_start();
			include HVAC_CE_PLUGIN_DIR . 'templates/certificates/template-generate-certificates.php';
			return ob_get_clean();
		} catch (Exception $e) {
			return '<div class="hvac-error">Error loading certificate generation: ' . esc_html($e->getMessage()) . '</div>';
		}
	}

	/**
	 * Include custom templates for plugin pages
	 */
	public function load_custom_templates($template) {
		// Check for dashboard page
		if (is_page('hvac-dashboard')) {
			$custom_template = HVAC_CE_PLUGIN_DIR . 'templates/template-hvac-dashboard.php';
			if (file_exists($custom_template)) {
				return $custom_template;
			}
		}
		
		// Check for community-login page
		if (is_page('community-login')) {
			$custom_template = HVAC_CE_PLUGIN_DIR . 'templates/page-community-login.php';
			if (file_exists($custom_template)) {
				return $custom_template;
			}
		}

		// Check for my-events page
		if (is_page('my-events')) {
			$custom_template = HVAC_CE_PLUGIN_DIR . 'templates/page-my-events.php';
			if (file_exists($custom_template)) {
				return $custom_template;
			}
		}
		
		// Check for trainer-profile page
		if (is_page('trainer-profile')) {
			$custom_template = HVAC_CE_PLUGIN_DIR . 'templates/template-trainer-profile.php';
			if (file_exists($custom_template)) {
				return $custom_template;
			}
		}
		
		// Check for event-summary page
		if (is_page('event-summary')) {
			$custom_template = HVAC_CE_PLUGIN_DIR . 'templates/template-event-summary.php';
			if (file_exists($custom_template)) {
				return $custom_template;
			}
		}
		
		// Check for email-attendees page
		if (is_page('email-attendees')) {
			$custom_template = HVAC_CE_PLUGIN_DIR . 'templates/email-attendees/template-email-attendees.php';
			if (file_exists($custom_template)) {
				return $custom_template;
			}
		}

		// Check for certificate-reports page
		if (is_page('certificate-reports')) {
			$custom_template = HVAC_CE_PLUGIN_DIR . 'templates/certificates/template-certificate-reports.php';
			if (file_exists($custom_template)) {
				return $custom_template;
			}
		}

		// Check for generate-certificates page
		if (is_page('generate-certificates')) {
			$custom_template = HVAC_CE_PLUGIN_DIR . 'templates/certificates/template-generate-certificates.php';
			if (file_exists($custom_template)) {
				return $custom_template;
			}
		}
		
		// Check for edit-profile page
		if (is_page('edit-profile')) {
			$custom_template = HVAC_CE_PLUGIN_DIR . 'templates/template-edit-profile.php';
			if (file_exists($custom_template)) {
				return $custom_template;
			}
		}

		// Check for single event view (temporary)
		if ( is_singular( 'tribe_events' ) ) {
			$custom_template = HVAC_CE_PLUGIN_DIR . 'templates/single-tribe_events.php';
			if ( file_exists( $custom_template ) ) {
				return $custom_template;
			}
		}
		
		// Add future custom templates here

		return $template;
	} // End load_custom_templates


} // End class HVAC_Community_Events