<?php

namespace FlexifyBlocks;

defined( 'ABSPATH' ) || exit;

final class App {

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

	/**
	 * Plugin version.
	 */
	private static string $version = '';

	/**
	 * Get plugin instance.
	 */
	public static function init(): App {

		if ( null === self::$instance ) {
			self::$instance = new self();

			self::$instance->define_constants();
			self::$instance->load_textdomain();
			self::$instance->register_modules();
		}

		return self::$instance;
	}

	/**
	 * Get plugin version.
	 */
	public static function version(): string {
		return self::$version;
	}

	/**
	 * Prevent direct creation.
	 */
	private function __construct() {}

	/**
	 * Prevent cloning.
	 */
	private function __clone() {}

	/**
	 * Prevent unserializing.
	 */
	public function __wakeup(): void {
		throw new \Exception( 'Cannot unserialize singleton.' );
	}

	/**
	 * Define plugin constants.
	 */
	private function define_constants(): void {

		if ( ! defined( 'FLBL_FILE' ) ) {
			define(
				'FLBL_FILE',
				dirname( __DIR__ ) . '/flexify-blocks.php'
			);
		}

		if ( ! defined( 'FLBL_VERSION' ) ) {
			$plugin_data = get_file_data(
				FLBL_FILE,
				[
					'Version' => 'Version',
				]
			);

			self::$version = $plugin_data['Version'] ?? '';

			define( 'FLBL_VERSION', self::$version );
		}
		if ( ! defined( 'FLBL_DIR' ) ) {
			define( 'FLBL_DIR', plugin_dir_path( FLBL_FILE ) );
		}
		if ( ! defined( 'FLBL_BLOCKS_DIR' ) ) {
			define( 'FLBL_BLOCKS_DIR', FLBL_DIR . 'build/blocks/' );
		}
		if ( ! defined( 'FLBL_URL' ) ) {
			define( 'FLBL_URL', plugin_dir_url( FLBL_FILE ) );
		}
        if (!defined('FLBL_PLUGIN_BASENAME')) {
            define('FLBL_PLUGIN_BASENAME', plugin_basename(FLBL_FILE));
        }
        if (!defined('FLBL_PRO_URL')) {
            define('FLBL_PRO_URL', '#');
        }
        if (!defined('FLBL_PRO_ACTIVE')) {
            define('FLBL_PRO_ACTIVE', class_exists('FlexifyBlocksPro\App') ? true : false);
        }
	}

	/**
	 * Load translations.
	 */
	private function load_textdomain(): void {

		load_plugin_textdomain(
			'flexify-blocks',
			false,
			dirname( plugin_basename( FLBL_FILE ) ) . '/languages'
		);
	}

	/**
	 * Register plugin modules.
	 */
	private function register_modules(): void {

		Admin\Admin::instance();
		RestApi\RestApi::instance();
		Core\BlockLoader::instance();
		Core\BlockStyleManager::instance();
		Core\SupportSvg::instance();

		// Theme support fallback.
		if ( ! current_theme_supports( 'menus' ) ) {
			add_theme_support( 'menus' );
		}
	}
}