<?php
/**
 * HVAC Announcements Manager
 *
 * @package HVAC_Community_Events
 * @since 1.0.0
 */

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

/**
 * Class HVAC_Announcements_Manager
 *
 * Main orchestrator for the announcements system
 */
class HVAC_Announcements_Manager {
    
    /**
     * Instance of this class
     *
     * @var HVAC_Announcements_Manager
     */
    private static $instance = null;
    
    /**
     * Component instances
     *
     * @var array
     */
    private $components = array();
    
    /**
     * Get instance of this class
     *
     * @return HVAC_Announcements_Manager
     */
    public static function get_instance() {
        if (null === self::$instance) {
            self::$instance = new self();
        }
        return self::$instance;
    }
    
    /**
     * Constructor
     */
    private function __construct() {
        $this->load_dependencies();
        $this->init_components();
        $this->init_hooks();
    }
    
    /**
     * Load required files
     */
    private function load_dependencies() {
        $base_path = plugin_dir_path(dirname(__FILE__)) . 'includes/';
        
        // Load component classes
        require_once $base_path . 'class-hvac-announcements-cpt.php';
        require_once $base_path . 'class-hvac-announcements-permissions.php';
        require_once $base_path . 'class-hvac-announcements-ajax.php';
        require_once $base_path . 'class-hvac-announcements-email.php';
        require_once $base_path . 'class-hvac-announcements-display.php';
    }
    
    /**
     * Initialize components
     */
    private function init_components() {
        $this->components['cpt'] = HVAC_Announcements_CPT::get_instance();
        $this->components['permissions'] = HVAC_Announcements_Permissions::get_instance();
        $this->components['ajax'] = HVAC_Announcements_Ajax::get_instance();
        $this->components['email'] = HVAC_Announcements_Email::get_instance();
        $this->components['display'] = HVAC_Announcements_Display::get_instance();
    }
    
    /**
     * Initialize hooks
     */
    private function init_hooks() {
        // Activation/deactivation hooks
        register_activation_hook(HVAC_PLUGIN_FILE, array($this, 'activate'));
        register_deactivation_hook(HVAC_PLUGIN_FILE, array($this, 'deactivate'));
        
        // Page creation
        add_action('init', array($this, 'maybe_create_pages'), 20);
        
        // Scripts and styles
        add_action('wp_enqueue_scripts', array($this, 'enqueue_frontend_assets'));
        add_action('admin_enqueue_scripts', array($this, 'enqueue_admin_assets'));
        
        // Add to plugin's script management
        add_filter('hvac_plugin_page_slugs', array($this, 'add_page_slugs'));
    }
    
    /**
     * Plugin activation
     */
    public function activate() {
        // Add capabilities
        HVAC_Announcements_Permissions::add_capabilities();
        
        // Create pages
        $this->create_pages();
        
        // Flush rewrite rules
        flush_rewrite_rules();
    }
    
    /**
     * Plugin deactivation
     */
    public function deactivate() {
        // Remove capabilities (optional - you might want to keep them)
        // HVAC_Announcements_Permissions::remove_capabilities();
        
        // Flush rewrite rules
        flush_rewrite_rules();
    }
    
    /**
     * Create required pages
     */
    private function create_pages() {
        $pages = array(
            array(
                'title' => 'Announcements',
                'slug' => 'master-announcements',
                'parent_slug' => 'master-dashboard',
                'template' => 'templates/page-master-announcements.php',
                'meta_key' => '_hvac_page_master_announcements_created',
            ),
            array(
                'title' => 'Resources',
                'slug' => 'trainer-resources',
                'parent_slug' => 'dashboard',
                'template' => 'templates/page-trainer-resources.php',
                'meta_key' => '_hvac_page_trainer_resources_created',
            ),
        );
        
        foreach ($pages as $page_data) {
            // Check if page was already created
            if (get_option($page_data['meta_key'])) {
                continue;
            }
            
            // Find parent page
            $parent_id = 0;
            if (!empty($page_data['parent_slug'])) {
                $parent_page = get_page_by_path($page_data['parent_slug']);
                if ($parent_page) {
                    $parent_id = $parent_page->ID;
                }
            }
            
            // Create page
            $page_id = wp_insert_post(array(
                'post_title' => $page_data['title'],
                'post_name' => $page_data['slug'],
                'post_content' => '',
                'post_status' => 'publish',
                'post_type' => 'page',
                'post_parent' => $parent_id,
                'meta_input' => array(
                    '_wp_page_template' => $page_data['template'],
                ),
            ));
            
            if (!is_wp_error($page_id)) {
                update_option($page_data['meta_key'], $page_id);
            }
        }
    }
    
    /**
     * Maybe create pages if they don't exist
     */
    public function maybe_create_pages() {
        // Check if pages exist
        $master_page = get_page_by_path('master-trainer/master-announcements');
        $resources_page = get_page_by_path('trainer/trainer-resources');
        
        if (!$master_page || !$resources_page) {
            $this->create_pages();
        }
    }
    
    /**
     * Add announcement page slugs to plugin pages list
     *
     * @param array $slugs Existing page slugs
     * @return array
     */
    public function add_page_slugs($slugs) {
        $slugs[] = 'master-announcements';
        $slugs[] = 'trainer-resources';
        return $slugs;
    }
    
    /**
     * Enqueue frontend assets
     */
    public function enqueue_frontend_assets() {
        // Check if we're on a relevant page
        if (!$this->is_announcement_page()) {
            return;
        }
        
        // Enqueue styles
        wp_enqueue_style(
            'hvac-announcements',
            plugin_dir_url(dirname(__FILE__)) . 'assets/css/hvac-announcements.css',
            array(),
            HVAC_VERSION
        );
        
        // Enqueue view script for trainer resources page
        if (is_page('trainer-resources') || strpos(home_url($GLOBALS['wp']->request), '/trainer/resources') !== false) {
            wp_enqueue_script(
                'hvac-announcements-view',
                plugin_dir_url(dirname(__FILE__)) . 'assets/js/hvac-announcements-view.js',
                array('jquery'),
                HVAC_VERSION,
                true
            );
            
            // Localize script for viewing
            wp_localize_script('hvac-announcements-view', 'hvac_ajax', array(
                'ajax_url' => admin_url('admin-ajax.php'),
                'nonce' => wp_create_nonce('hvac_announcements_nonce'),
            ));
        }
        
        // Enqueue scripts for master announcements page
        if (is_page('master-announcements')) {
            wp_enqueue_script(
                'hvac-announcements-admin',
                plugin_dir_url(dirname(__FILE__)) . 'assets/js/hvac-announcements-admin.js',
                array('jquery', 'wp-util'),
                HVAC_VERSION,
                true
            );
            
            // Add TinyMCE
            wp_enqueue_editor();
            
            // Add media uploader
            wp_enqueue_media();
            
            // Localize script
            wp_localize_script('hvac-announcements-admin', 'hvac_announcements', array(
                'ajax_url' => admin_url('admin-ajax.php'),
                'nonce' => wp_create_nonce('hvac_announcements_nonce'),
                'strings' => array(
                    'confirm_delete' => __('Are you sure you want to delete this announcement?', 'hvac'),
                    'error_loading' => __('Error loading announcements', 'hvac'),
                    'error_saving' => __('Error saving announcement', 'hvac'),
                    'success_created' => __('Announcement created successfully', 'hvac'),
                    'success_updated' => __('Announcement updated successfully', 'hvac'),
                    'success_deleted' => __('Announcement deleted successfully', 'hvac'),
                ),
            ));
        }
    }
    
    /**
     * Enqueue admin assets
     */
    public function enqueue_admin_assets($hook) {
        // Only load on our custom pages
        if (!$this->is_announcement_page()) {
            return;
        }
        
        // Admin styles
        wp_enqueue_style(
            'hvac-announcements-admin',
            plugin_dir_url(dirname(__FILE__)) . 'assets/css/hvac-announcements-admin.css',
            array(),
            HVAC_VERSION
        );
    }
    
    /**
     * Check if current page is an announcement-related page
     *
     * @return bool
     */
    private function is_announcement_page() {
        if (is_page('master-announcements') || is_page('trainer-resources')) {
            return true;
        }
        
        // Check for hierarchical URLs
        global $wp;
        $current_url = home_url($wp->request);
        
        if (strpos($current_url, '/master-trainer/announcements') !== false ||
            strpos($current_url, '/trainer/resources') !== false) {
            return true;
        }
        
        return false;
    }
    
    /**
     * Get component instance
     *
     * @param string $component Component name
     * @return object|null
     */
    public function get_component($component) {
        return isset($this->components[$component]) ? $this->components[$component] : null;
    }
    
    /**
     * Initialize the announcements system
     * Called from main plugin file
     */
    public static function init() {
        return self::get_instance();
    }
}