<?php
/**
 * HVAC Scripts and Styles Manager
 *
 * Centralized management of all plugin scripts and styles
 *
 * @package HVAC_Community_Events
 * @since 2.0.0
 */

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

/**
 * HVAC_Scripts_Styles class
 */
class HVAC_Scripts_Styles {
    
    /**
     * Instance
     * 
     * @var HVAC_Scripts_Styles
     */
    private static $instance = null;
    
    /**
     * Script version for cache busting
     * 
     * @var string
     */
    private $version;
    
    /**
     * Get instance
     * 
     * @return HVAC_Scripts_Styles
     */
    public static function instance() {
        if (null === self::$instance) {
            self::$instance = new self();
        }
        return self::$instance;
    }
    
    /**
     * Constructor
     */
    private function __construct() {
        $this->version = HVAC_PLUGIN_VERSION;
        $this->init_hooks();
    }
    
    /**
     * Initialize hooks
     * 
     * @return void
     */
    private function init_hooks() {
        // Frontend scripts and styles
        add_action('wp_enqueue_scripts', array($this, 'enqueue_frontend_assets'));
        
        // Admin scripts and styles
        add_action('admin_enqueue_scripts', array($this, 'enqueue_admin_assets'));
        
        // Login page scripts and styles
        add_action('login_enqueue_scripts', array($this, 'enqueue_login_assets'));
    }
    
    /**
     * Enqueue frontend assets
     * 
     * @return void
     */
    public function enqueue_frontend_assets() {
        // Only enqueue on plugin pages
        if (!$this->is_plugin_page()) {
            return;
        }
        
        // Main plugin styles
        wp_enqueue_style(
            'hvac-community-events',
            HVAC_PLUGIN_URL . 'assets/css/hvac-community-events.css',
            array(),
            $this->version
        );
        
        // Dashboard styles
        if ($this->is_dashboard_page()) {
            wp_enqueue_style(
                'hvac-dashboard',
                HVAC_PLUGIN_URL . 'assets/css/hvac-dashboard.css',
                array('hvac-community-events'),
                $this->version
            );
            
            wp_enqueue_style(
                'hvac-dashboard-enhanced',
                HVAC_PLUGIN_URL . 'assets/css/hvac-dashboard-enhanced.css',
                array('hvac-dashboard'),
                $this->version
            );
        }
        
        // Registration styles
        if ($this->is_registration_page()) {
            wp_enqueue_style(
                'hvac-registration',
                HVAC_PLUGIN_URL . 'assets/css/hvac-registration.css',
                array('hvac-community-events'),
                $this->version
            );
        }
        
        // Communication templates styles
        if ($this->is_communication_page()) {
            wp_enqueue_style(
                'communication-templates',
                HVAC_PLUGIN_URL . 'assets/css/communication-templates.css',
                array('hvac-community-events'),
                $this->version
            );
        }
        
        // Main plugin scripts
        wp_enqueue_script(
            'hvac-community-events',
            HVAC_PLUGIN_URL . 'assets/js/hvac-community-events.js',
            array('jquery'),
            $this->version,
            true
        );
        
        // Dashboard scripts
        if ($this->is_dashboard_page()) {
            wp_enqueue_script(
                'hvac-dashboard',
                HVAC_PLUGIN_URL . 'assets/js/hvac-dashboard.js',
                array('jquery', 'hvac-community-events'),
                $this->version,
                true
            );
            
            wp_enqueue_script(
                'hvac-dashboard-enhanced',
                HVAC_PLUGIN_URL . 'assets/js/hvac-dashboard-enhanced.js',
                array('hvac-dashboard'),
                $this->version,
                true
            );
        }
        
        // Registration scripts
        if ($this->is_registration_page()) {
            wp_enqueue_script(
                'hvac-registration',
                HVAC_PLUGIN_URL . 'assets/js/hvac-registration.js',
                array('jquery', 'hvac-community-events'),
                $this->version,
                true
            );
        }
        
        // Help system scripts
        wp_enqueue_script(
            'hvac-help-system',
            HVAC_PLUGIN_URL . 'assets/js/hvac-help-system.js',
            array('jquery'),
            $this->version,
            true
        );
        
        // Localize main script
        wp_localize_script('hvac-community-events', 'hvac_ajax', array(
            'ajax_url' => admin_url('admin-ajax.php'),
            'nonce' => wp_create_nonce('hvac_ajax_nonce'),
            'is_logged_in' => is_user_logged_in(),
            'plugin_url' => HVAC_PLUGIN_URL,
        ));
        
        // Localize dashboard script
        if ($this->is_dashboard_page()) {
            wp_localize_script('hvac-dashboard', 'hvac_dashboard', array(
                'ajax_url' => admin_url('admin-ajax.php'),
                'nonce' => wp_create_nonce('hvac_dashboard_nonce'),
                'strings' => array(
                    'loading' => __('Loading...', 'hvac-community-events'),
                    'error' => __('An error occurred. Please try again.', 'hvac-community-events'),
                ),
            ));
        }
    }
    
    /**
     * Enqueue admin assets
     * 
     * @param string $hook Current admin page hook
     * @return void
     */
    public function enqueue_admin_assets($hook) {
        // Global admin styles
        wp_enqueue_style(
            'hvac-admin',
            HVAC_PLUGIN_URL . 'assets/css/hvac-admin.css',
            array(),
            $this->version
        );
        
        // Global admin scripts
        wp_enqueue_script(
            'hvac-admin',
            HVAC_PLUGIN_URL . 'assets/js/hvac-admin.js',
            array('jquery'),
            $this->version . '.2', // Force cache refresh for jQuery fix
            true
        );
        
        // Localize admin script
        wp_localize_script('hvac-admin', 'hvac_admin', array(
            'ajax_url' => admin_url('admin-ajax.php'),
            'nonce' => wp_create_nonce('hvac_admin_nonce'),
        ));
        
        // Plugin-specific admin pages
        if (strpos($hook, 'hvac-community-events') !== false) {
            // Add any additional plugin-specific admin assets here
        }
        
        // Certificate admin scripts
        if (strpos($hook, 'certificate') !== false) {
            wp_enqueue_script(
                'hvac-certificate-admin',
                HVAC_PLUGIN_URL . 'assets/js/hvac-certificate-admin.js',
                array('jquery'),
                $this->version,
                true
            );
        }
    }
    
    /**
     * Enqueue login page assets
     * 
     * @return void
     */
    public function enqueue_login_assets() {
        // Check if we're on the custom login page
        if (!$this->is_custom_login_page()) {
            return;
        }
        
        wp_enqueue_style(
            'hvac-login',
            HVAC_PLUGIN_URL . 'assets/css/hvac-login.css',
            array(),
            $this->version
        );
        
        wp_enqueue_script(
            'hvac-login',
            HVAC_PLUGIN_URL . 'assets/js/hvac-login.js',
            array('jquery'),
            $this->version,
            true
        );
    }
    
    /**
     * Check if current page is a plugin page
     * 
     * @return bool
     */
    private function is_plugin_page() {
        // Check using template loader if available
        if (class_exists('HVAC_Template_Loader')) {
            return HVAC_Template_Loader::is_plugin_template();
        }
        
        // Fallback: check URL path
        $current_path = trim(parse_url($_SERVER['REQUEST_URI'], PHP_URL_PATH), '/');
        $plugin_paths = array(
            'trainer',
            'master-trainer',
            'training-login',
            'hvac-dashboard',
            'manage-event',
            'event-summary',
        );
        
        foreach ($plugin_paths as $path) {
            if (strpos($current_path, $path) !== false) {
                return true;
            }
        }
        
        return false;
    }
    
    /**
     * Check if current page is a dashboard page
     * 
     * @return bool
     */
    private function is_dashboard_page() {
        return is_page('trainer-dashboard') || 
               is_page('master-dashboard') ||
               is_page('hvac-dashboard') ||
               is_page('trainer/dashboard') ||
               is_page('master-trainer/dashboard');
    }
    
    /**
     * Check if current page is registration page
     * 
     * @return bool
     */
    private function is_registration_page() {
        return is_page('trainer-registration') ||
               is_page('trainer/registration');
    }
    
    /**
     * Check if current page is communication page
     * 
     * @return bool
     */
    private function is_communication_page() {
        return is_page('communication-templates') ||
               is_page('trainer/communication-templates') ||
               is_page('communication-schedules') ||
               is_page('trainer/communication-schedules');
    }
    
    /**
     * Check if current page is custom login page
     * 
     * @return bool
     */
    private function is_custom_login_page() {
        return is_page('training-login') ||
               is_page('community-login') ||
               is_page('trainer/login');
    }
    
    /**
     * Get script version with cache busting
     * 
     * @param string $file File path
     * @return string
     */
    public function get_asset_version($file = '') {
        // In development, use file modification time
        if (defined('WP_DEBUG') && WP_DEBUG && $file) {
            $file_path = HVAC_PLUGIN_DIR . $file;
            if (file_exists($file_path)) {
                return filemtime($file_path);
            }
        }
        
        return $this->version;
    }
}