<?php

namespace WPZaraz;

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

use WPZaraz\Support\Options;
use WPZaraz\Support\Logger;
use WPZaraz\Tracking\EventDispatcher;
use WPZaraz\Tracking\FrontendTracker;
use WPZaraz\Tracking\WooCommerceTracker;
use WPZaraz\Tracking\FormsTracker;
use WPZaraz\Tracking\ServerDispatch;
use WPZaraz\Privacy\ConsentManager;
use WPZaraz\Privacy\Banner;
use WPZaraz\Admin\AdminController;
use WPZaraz\Licensing\LicenseManager;

/**
 * Main plugin singleton coordinator.
 */
class Plugin {

    /**
     * Singleton instance.
     *
     * @var Plugin|null
     */
    private static ?Plugin $instance = null;

    /**
     * Retrieves the singleton instance.
     *
     * @return Plugin
     */
    public static function getInstance(): Plugin {
        if (self::$instance === null) {
            self::$instance = new self();
        }
        return self::$instance;
    }

    /**
     * Private constructor.
     */
    private function __construct() {}

    /**
     * Initializes all plugin subsystems.
     */
    public function init(): void {
        // Register HPOS compatibility
        add_action('before_woocommerce_init', [$this, 'declareHposCompatibility']);

        // Initialize Privacy & Consent
        if (class_exists(ConsentManager::class)) {
            (new ConsentManager())->register();
        }
        if (class_exists(Banner::class) && Options::get('banner_enabled', false)) {
            (new Banner())->register();
        }

        // Frontend and WooCommerce tracking share one queue so the footer renders WooCommerce events
        $dispatcher = new EventDispatcher();

        // Initialize Frontend Tracking
        if (class_exists(FrontendTracker::class)) {
            (new FrontendTracker($dispatcher))->register();
        }

        // Initialize WooCommerce Tracking
        if (class_exists(WooCommerceTracker::class)) {
            (new WooCommerceTracker($dispatcher))->register();
        }

        // Initialize Hybrid Server Dispatch
        if (class_exists(ServerDispatch::class) && Options::get('wc_server_dispatch', true)) {
            (new ServerDispatch())->register();
        }

        // Initialize Form Tracking
        if (class_exists(FormsTracker::class) && Options::get('track_forms', true)) {
            (new FormsTracker())->register();
        }

        // Instagram posts rendered by Zaraz (shortcode and pasted links)
        if (class_exists(\WPZaraz\Embeds\InstagramEmbeds::class)) {
            (new \WPZaraz\Embeds\InstagramEmbeds())->register();
        }

        // Initialize Pro Tracking Suite (User lifecycle & premium forms)
        if (class_exists(\WPZaraz\Tracking\ProTracker::class) && \WPZaraz\Licensing\FeatureGate::hasAccess('pro_tracking')) {
            (new \WPZaraz\Tracking\ProTracker())->register();
        }

        // Initialize Admin UI
        if (is_admin() && class_exists(AdminController::class)) {
            (new AdminController())->register();
            (new \WPZaraz\Admin\ReviewPrompt())->register();
            (new \WPZaraz\Admin\DebugTools())->register();
        }

        // Initialize Licensing
        if (class_exists(LicenseManager::class)) {
            (new LicenseManager())->register();
        }
    }

    /**
     * Declares compatibility with WooCommerce High-Performance Order Storage (HPOS).
     */
    public function declareHposCompatibility(): void {
        if (class_exists('\Automattic\WooCommerce\Utilities\FeaturesUtil')) {
            $entryFile = defined('ZBRIDGE_FILE') ? ZBRIDGE_FILE : (defined('WP_ZBRIDGE_FILE') ? WP_ZBRIDGE_FILE : (defined('ZBRIDGE_PATH') ? ZBRIDGE_PATH . 'wp-zbridge.php' : (defined('WP_ZBRIDGE_PATH') ? WP_ZBRIDGE_PATH . 'wp-zbridge.php' : __FILE__)));
            \Automattic\WooCommerce\Utilities\FeaturesUtil::declare_compatibility('custom_order_tables', $entryFile, true);
        }
    }
}