<?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');
	    $files_to_include = [
	        'class-hvac-roles.php',
	        'class-hvac-registration.php',
	        'class-hvac-settings.php',
	        'community/class-login-handler.php',
	        'community/class-event-handler.php',
	        'class-hvac-dashboard-data.php'
	    ];
	    foreach ($files_to_include as $file) {
	        $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');
	        }
	    }
	    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'));
	} // End init_hooks

	/**
	 * 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
		$roles = new HVAC_Roles();
		$roles->remove_trainer_role();

		// Additional deactivation tasks
		// ...
	}

	/**
	 * Initialize plugin actions attached to 'init' hook
	 */
	public function init() {
	    HVAC_Logger::info('Init method started', 'Core');
	    // Initialize handlers
	    new \HVAC_Community_Events\Community\Login_Handler();
	    HVAC_Logger::info('Login_Handler initialized', 'Core');
	    new HVAC_Registration();
	    HVAC_Logger::info('HVAC_Registration initialized', 'Core');
	    HVAC_Logger::info('Init method completed', 'Core');

		// Prevent trainers from accessing wp-admin
		add_action('admin_init', array($this, 'redirect_trainers_from_admin'));
	}

	/**
	 * Redirect HVAC trainers from admin area to frontend dashboard
	 */
	public function redirect_trainers_from_admin() {
		if (defined('DOING_AJAX') && DOING_AJAX) {
			return;
		}

		// Check if user is trying to access wp-admin and has trainer role but not admin caps
		if ( is_admin() && ! current_user_can('manage_options') && current_user_can('view_hvac_dashboard') ) {
			wp_redirect(home_url('/hvac-dashboard/')); // Corrected slug
			exit;
		}
	}

	/**
	 * Load custom templates for plugin pages.
	 *
	 * @param string $template The path of the template to include.
	 * @return string The path of the template to include.
	 */
	public function load_custom_templates( $template ) {
		// Check if we are on the HVAC Dashboard page
		if ( is_page( 'hvac-dashboard' ) ) {
			$new_template = HVAC_CE_PLUGIN_DIR . 'templates/template-hvac-dashboard.php';
			if ( file_exists( $new_template ) ) {
				return $new_template;
			}
		}

		// Add checks for other custom pages here if needed

		return $template;
	}

} // End class HVAC_Community_Events