<?php
namespace Rafgrid;

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

/**
 * Main plugin bootstrap.
 */
final class Plugin {

	/**
	 * Expected signature of the official author contacts (class-author.php).
	 * If the contacts are edited without updating this signature, admins are notified.
	 */
	private const string AUTHOR_SIGNATURE = '33404d05dc7bd36625d5326996378ef31a48f0a857ba1e5254496336b2e063e7';

	/**
	 * Interface languages shipped with the plugin (Settings -> Plugin language).
	 * Names are shown in their own language, so they are not translated.
	 */
	public const array LANGUAGES = array(
		'en_US' => 'English',
		'es_ES' => 'Español',
		'de_DE' => 'Deutsch',
		'fr_FR' => 'Français',
		'pt_BR' => 'Português (Brasil)',
		'ru_RU' => 'Русский',
		'tr_TR' => 'Türkçe',
		'hy'    => 'Հայերեն',
		'ja'    => '日本語',
		'zh_CN' => '简体中文',
	);

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

	/**
	 * @var Settings
	 */
	public $settings;

	/**
	 * @var Admin
	 */
	public $admin;

	/**
	 * @var REST
	 */
	public $rest;

	/**
	 * Singleton.
	 *
	 * @return Plugin
	 */
	public static function instance() {
		if ( null === self::$instance ) {
			self::$instance = new self();
			self::$instance->init();
		}
		return self::$instance;
	}

	/**
	 * Init hooks.
	 */
	public function init() {
		$this->settings = new Settings();
		$this->admin   = new Admin( $this->settings );
		$this->rest    = new REST( $this->settings );

		add_action( 'init', array( $this, 'maybe_upgrade' ), 1 );
		add_action( 'admin_init', array( $this, 'verify_author_contacts' ) );
		add_action( 'admin_notices', array( $this, 'author_tamper_notice' ) );
		Jobs::register();
		Rules::register();
		add_action( 'template_redirect', array( $this, 'maybe_redirect_old_slug' ), 1 );
		add_action( 'init', array( $this, 'load_textdomain' ) );
		add_filter( 'plugin_locale', array( $this, 'plugin_language' ), 10, 2 );
		add_filter( 'load_textdomain_mofile', array( $this, 'plugin_language_mofile' ), 10, 2 );
		add_filter( 'load_script_translation_file', array( $this, 'plugin_language_json' ), 10, 3 );
		add_action( 'before_woocommerce_init', array( $this, 'declare_woo_compatibility' ) );
	}

	/**
	 * Declare compatibility with modern WooCommerce features (HPOS, blocks).
	 * Without this, WooCommerce shows compatibility warnings since 8.0.
	 */
	public function declare_woo_compatibility() {
		if ( ! class_exists( '\Automattic\WooCommerce\Utilities\FeaturesUtil', false ) ) {
			return;
		}
		\Automattic\WooCommerce\Utilities\FeaturesUtil::declare_compatibility( 'custom_order_tables', RAFGRID_FILE, true );
		\Automattic\WooCommerce\Utilities\FeaturesUtil::declare_compatibility( 'cart_checkout_blocks', RAFGRID_FILE, true );
	}

	/**
	 * Verify that the official author contacts were not silently replaced.
	 *
	 * @return bool
	 */
	public function verify_author_contacts(): bool {
		return hash_equals( self::AUTHOR_SIGNATURE, Author::signature() );
	}

	/**
	 * Admin notice when the author contacts do not match the signature.
	 */
	public function author_tamper_notice() {
		if ( ! current_user_can( 'manage_options' ) || $this->verify_author_contacts() ) {
			return;
		}
		if ( ! self::is_plugin_screen() ) {
			return;
		}
		echo '<div class="notice notice-warning"><p>';
		echo esc_html__( 'Rafgrid: the official author support contacts in this copy were modified. Official support: ', 'rafgrid' );
		echo esc_html( Author::line() );
		echo '</p></div>';
	}

	/**
	 * Versioned upgrade routine: runs on version change without reactivation,
	 * so DB tables and defaults appear after a normal plugin update too.
	 */
	public function maybe_upgrade() {
		if ( get_option( 'rafgrid_version' ) === RAFGRID_VERSION ) {
			return;
		}
		Migrate::run();
		Settings::ensure_defaults();
		History::create_table();
		Audit::create_table();
		Jobs::ensure_scheduled();
		update_option( 'rafgrid_version', RAFGRID_VERSION );
	}

	/**
	 * Plugin language override (Settings -> Plugin language). Does not change the whole admin.
	 *
	 * @param string $locale Locale.
	 * @param string $domain Text domain.
	 * @return string
	 */
	public function plugin_language( $locale, $domain ) {
		if ( 'rafgrid' !== $domain ) {
			return $locale;
		}
		$lang = $this->language_override();
		return '' !== $lang ? $lang : $locale;
	}

	/**
	 * Locale chosen in Settings -> Plugin language, or '' to follow the site.
	 *
	 * @return string
	 */
	private function language_override(): string {
		$lang = (string) $this->settings->get( 'language', 'auto' );
		return array_key_exists( $lang, self::LANGUAGES ) ? $lang : '';
	}

	/**
	 * Plugin language for PHP strings: point just-in-time loading of this text
	 * domain at the chosen locale (en_US has no file, so strings stay English).
	 *
	 * @param string $mofile Translation file.
	 * @param string $domain Text domain.
	 * @return string
	 */
	public function plugin_language_mofile( $mofile, $domain ) {
		$lang = 'rafgrid' === $domain ? $this->language_override() : '';
		return '' !== $lang ? RAFGRID_DIR . 'languages/rafgrid-' . $lang . '.mo' : $mofile;
	}

	/**
	 * Plugin language for the React app's JSON translations.
	 *
	 * @param string|false $file   Translation file.
	 * @param string       $handle Script handle.
	 * @param string       $domain Text domain.
	 * @return string|false
	 */
	public function plugin_language_json( $file, $handle, $domain ) {
		$lang = 'rafgrid' === $domain ? $this->language_override() : '';
		if ( '' === $lang || 'rafgrid-app' !== $handle ) {
			return $file;
		}
		return RAFGRID_DIR . 'languages/rafgrid-' . $lang . '-' . md5( 'build/index.js' ) . '.json';
	}

	/**
	 * 301 redirect from a renamed slug (map written when Slug is edited in the sheet).
	 */
	public function maybe_redirect_old_slug() {
		if ( ! is_404() ) {
			return;
		}
		$map = get_option( 'rafgrid_redirects', array() );
		if ( ! is_array( $map ) || empty( $map ) ) {
			return;
		}
		$path = trim( (string) wp_parse_url( esc_url_raw( wp_unslash( $_SERVER['REQUEST_URI'] ?? '' ) ), PHP_URL_PATH ), '/' );
		if ( isset( $map[ $path ] ) ) {
			wp_safe_redirect( home_url( '/' . $map[ $path ] . '/' ), 301 );
			exit;
		}
	}

	/**
	 * Register the bundled /languages folder for just-in-time loading; language
	 * packs from translate.wordpress.org take precedence. The filters above
	 * apply the "Plugin language" setting to this text domain only.
	 */
	public function load_textdomain() {
		load_plugin_textdomain( 'rafgrid', false, dirname( plugin_basename( RAFGRID_FILE ) ) . '/languages' ); // phpcs:ignore PluginCheck.CodeAnalysis.DiscouragedFunctions.load_plugin_textdomainFound -- Needed for the per-plugin language setting and the bundled hy/ru_RU files.
	}

	/**
	 * Activation: defaults + history table.
	 */
	public static function activate() {
		Migrate::run();
		Settings::ensure_defaults();
		History::create_table();
		Audit::create_table();
		Jobs::ensure_scheduled();
	}

	/**
	 * Is the current admin screen one of this plugin's pages (sheet, docs, settings)?
	 *
	 * @return bool
	 */
	public static function is_plugin_screen(): bool {
		$screen = function_exists( 'get_current_screen' ) ? get_current_screen() : null;
		return $screen && str_contains( (string) $screen->id, 'rafgrid' );
	}

	/**
	 * Is WooCommerce active?
	 *
	 * @return bool
	 */
	public static function has_woo() {
		return class_exists( 'WooCommerce', false ) || function_exists( 'wc_get_product' ) || post_type_exists( 'product' );
	}
}