<?php

class WCML_Dependencies {

	const MIN_WPML        = '4.3.5';
	const MIN_WPML_ST     = '3.0.5';
	const MIN_WOOCOMMERCE = '3.9.0';

	/** @var string $err_message */
	private $err_message = '';

	/** @var bool|null $allok */
	private $allok;

	/**
	 * @var WCML_Tracking_Link
	 */
	private $tracking_link;

	/** @var array $xml_config_errors */
	public $xml_config_errors = [];

	public function __construct() {

		if ( is_admin() ) {
			add_action( 'init', [ $this, 'check_wpml_config' ], 100 );
		}

		$this->tracking_link = new WCML_Tracking_Link();
	}

	public function check() {
		/**
		 * @var SitePress|null   $sitepress
		 * @var WooCommerce|null $woocommerce
		 */
		global $sitepress, $woocommerce;

		if ( null === $this->allok ) {
			$this->allok = true;

			$missing = [];
			$core_ok = true;
			$st_ok   = true;
			$wc_ok   = true;

			if ( ! defined( 'ICL_SITEPRESS_VERSION' ) || ICL_PLUGIN_INACTIVE || is_null( $sitepress ) || ! class_exists( 'SitePress' ) ) {
				$missing['WPML'] = $this->tracking_link->getWpmlHome();
				$core_ok         = false;
			} elseif ( version_compare( ICL_SITEPRESS_VERSION, self::MIN_WPML, '<' ) ) {
				add_action( 'admin_notices', [ $this, '_old_wpml_warning' ] );
				$core_ok = false;
			} elseif ( ! $sitepress->setup() ) {
				/* phpcs:ignore WordPress.VIP.SuperGlobalInputUsage.AccessDetected */
				if ( ! ( isset( $_GET['page'] ) && WPML_PLUGIN_FOLDER . '/menu/languages.php' === $_GET['page'] ) ) {
					add_action( 'admin_notices', [ $this, '_wpml_not_installed_warning' ] );
				}
				$core_ok = false;
			}

			if ( ! class_exists( 'WooCommerce' ) || ! function_exists( 'WC' ) ) {
				$missing['WooCommerce'] = 'http://www.woothemes.com/woocommerce/';
				$wc_ok                  = false;
			} elseif (
				defined( 'WC_VERSION' ) && version_compare( WC_VERSION, self::MIN_WOOCOMMERCE, '<' ) ||
				isset( $woocommerce->version ) && version_compare( $woocommerce->version, self::MIN_WOOCOMMERCE, '<' )
			) {
				add_action( 'admin_notices', [ $this, '_old_wc_warning' ] );
				$wc_ok = false;
			}

			if ( ! defined( 'WPML_ST_VERSION' ) ) {
				$missing['WPML String Translation'] = $this->tracking_link->getWpmlStFaq();
				$st_ok                              = false;
			} elseif ( version_compare( WPML_ST_VERSION, self::MIN_WPML_ST, '<' ) ) {
				add_action( 'admin_notices', [ $this, '_old_wpml_st_warning' ] );
				$st_ok = false;
			}

			$has_no_wpml_plugin = ! ( $core_ok || $st_ok );
			$full_mode          = $core_ok && $st_ok && $wc_ok;
			$standalone         = $has_no_wpml_plugin && $wc_ok;
			$this->allok        = $full_mode || $standalone;

			if ( ! $this->allok && count( $missing ) ) {
				$possibly_standalone = $has_no_wpml_plugin && ! $wc_ok;
				add_action( 'admin_notices', self::show_missing_plugins_warning( $missing, $possibly_standalone ) );
			}

			if ( $full_mode ) {
				$this->check_for_incompatible_permalinks();
				add_action( 'init', [ $this, 'check_for_translatable_default_taxonomies' ] );
			}

			if ( isset( $sitepress ) ) {
				$this->allok = $full_mode && $sitepress->setup();
			}
		}

		return $this->allok;
	}

	/**
	 * Adds admin notice.
	 */
	public function _old_wpml_warning() {
		?>
		<div class="message error">
			<p>
			<?php
			printf(
				/* translators: %1$s is a URL and %2$s is a version number */
				__(
					'WooCommerce Multilingual & Multicurrency is enabled but not effective. It is not compatible with  <a href="%1$s">WPML</a> versions prior %2$s.',
					'woocommerce-multilingual'
				),
				$this->tracking_link->getWpmlHome(),
				self::MIN_WPML
			);
			?>
					</p>
		</div>
		<?php
	}

	public function _wpml_not_installed_warning() {
		?>
		<div class="message error">
			<p><?php printf( __( 'WooCommerce Multilingual & Multicurrency is enabled but not effective. Please finish the installation of WPML first.', 'woocommerce-multilingual' ) ); ?></p>
		</div>
		<?php
	}

	public function _old_wc_warning() {
		?>
		<div class="message error">
			<p>
			<?php
			printf(
				/* translators: %1$s is a URL and %2$s is a version number */
				__(
					'WooCommerce Multilingual & Multicurrency is enabled but not effective. It is not compatible with  <a href="%1$s">Woocommerce</a> versions prior %2$s.',
					'woocommerce-multilingual'
				),
				'http://www.woothemes.com/woocommerce/',
				self::MIN_WOOCOMMERCE
			);
			?>
					</p>
		</div>
		<?php
	}

	public function _old_wpml_st_warning() {
		?>
		<div class="message error">
			<p>
			<?php
			printf(
				/* translators: %1$s is a URL and %2$s is a version number */
				__(
					'WooCommerce Multilingual & Multicurrency is enabled but not effective. It is not compatible with  <a href="%1$s">WPML String Translation</a> versions prior %2$s.',
					'woocommerce-multilingual'
				),
				$this->tracking_link->getWpmlHome(),
				self::MIN_WPML_ST
			);
			?>
					</p>
		</div>
		<?php
	}

	/**
	 * Adds default taxonomies notice.
	 */
	public function check_for_translatable_default_taxonomies() {

		$default_taxonomies = [ 'product_cat', 'product_tag', 'product_shipping_class' ];
		$show_error         = false;

		foreach ( $default_taxonomies as $taxonomy ) {
			if ( ! is_taxonomy_translated( $taxonomy ) ) {
				$show_error = true;
				break;
			}
		}

		if ( $show_error ) {
			$support_link = '<a href="' . WCML_Tracking_Link::getWpmlSupport() . '">' . __( 'WPML support', 'woocommerce-multilingual' ) . '</a>';

			/* translators: Part 1/6 of a message telling users that some taxonomies, required for WCML to work, are not set as translatable when they should */
			$sentences[] = _x( "Some taxonomies in your site are forced to be untranslatable. This is causing a problem when you're trying to run a multilingual WooCommerce site.", 'Default taxonomies must be translatable: 1/6', 'woocommerce-multilingual' );
			/* translators: Part 2/6 of a message telling users that some taxonomies, required for WCML to work, are not set as translatable when they should */
			$sentences[] = _x( 'A plugin or the theme are probably doing this.', 'Default taxonomies must be translatable: 2/6', 'woocommerce-multilingual' );
			/* translators: Part 3/6 of a message telling users that some taxonomies, required for WCML to work, are not set as translatable when they should */
			$sentences[] = _x( 'What you can do:', 'Default taxonomies must be translatable: 3/6', 'woocommerce-multilingual' );
			/* translators: Part 4/6 of a message telling users that some taxonomies, required for WCML to work, are not set as translatable when they should */
			$sentences[] = _x( '1. Temporarily disable plugins and see if this message disappears.', 'Default taxonomies must be translatable: 4/6', 'woocommerce-multilingual' );
			/* translators: Part 5/6 of a message telling users that some taxonomies, required for WCML to work, are not set as translatable when they should */
			$sentences[] = _x( '2. Temporarily switch the theme and see if this message disappears.', 'Default taxonomies must be translatable: 5/6', 'woocommerce-multilingual' );
			/* translators: Part 6/6 of a message telling users that some taxonomies, required for WCML to work, are not set as translatable when they should */
			$sentences[] = sprintf( _x( "It's best to contact %s, tell that you're getting this message and offer to send a Duplicator copy of the site. We will work with the theme/plugin author and fix the problem for good. In the meanwhile, we'll give you a temporary solution, so you're not stuck.", 'Default taxonomies must be translatable: 6/6', 'woocommerce-multilingual' ), $support_link );

			$this->err_message = '<div class="message error"><p>' . implode( '</p><p>', $sentences ) . '</p></div>';
			add_action( 'admin_notices', [ $this, 'plugin_notice_message' ] );
		}
	}

	/**
	 * @param array $missing_plugins
	 * @param bool  $possibly_standalone
	 *
	 * @return Closure
	 */
	private static function show_missing_plugins_warning( $missing_plugins, $possibly_standalone ) {
		return function() use ( $missing_plugins, $possibly_standalone ) {
			if ( $possibly_standalone ) {
				// Limit missing plugins to 'WooCommerce'
				$missing_plugins = array_intersect_key( $missing_plugins, [ 'WooCommerce' => 1 ] );
			}

			$missing = '';
			$counter = 0;
			foreach ( $missing_plugins as $title => $url ) {
				$counter ++;
				if ( $counter == sizeof( $missing_plugins ) ) {
					$sep = '';
				} elseif ( $counter == sizeof( $missing_plugins ) - 1 ) {
					$sep = ' ' . __( 'and', 'woocommerce-multilingual' ) . ' ';
				} else {
					$sep = ', ';
				}
				$missing .= '<a href="' . $url . '">' . $title . '</a>' . $sep;
			}
			?>

			<div class="message error">
				<p><?php
					/* translators: %s is a list of plugin names  */
					printf( __( 'WooCommerce Multilingual & Multicurrency is enabled but not effective. It requires %s in order to work.', 'woocommerce-multilingual' ), $missing );
				?></p>
			</div>
			<?php
		};
	}

	/**
	 * For all the urls to work we need either:
	 * 1) the shop page slug must be the same in all languages
	 * 2) or the shop prefix disabled in woocommerce settings
	 * one of these must be true for product urls to work
	 * if none of these are true, display a warning message
	 */
	private function check_for_incompatible_permalinks() {
		global $sitepress, $sitepress_settings, $pagenow;

		// WooCommerce 2.x specific checks
		$permalinks = get_option( 'woocommerce_permalinks', [ 'product_base' => '' ] );
		if ( empty( $permalinks['product_base'] ) ) {
			return;
		}

		$tm_folder = defined( 'WPML_TM_FOLDER' ) ? WPML_TM_FOLDER : 'tm';

		$message  = __( 'Because this site uses the default permalink structure, you cannot use slug translation for product permalinks.', 'woocommerce-multilingual' );
		$message .= '<br /><br />';
		$message .= __( 'Please choose a different permalink structure or disable slug translation.', 'woocommerce-multilingual' );
		$message .= '<br /><br />';
		$message .= '<a href="' . admin_url( 'options-permalink.php' ) . '">' . __( 'Permalink settings', 'woocommerce-multilingual' ) . '</a>';
		$message .= ' | ';
		$message .= '<a href="' . admin_url( 'admin.php?page=' . $tm_folder . '/menu/main.php&sm=mcsetup#icl_custom_posts_sync_options' ) . '">' . __( 'Configure products slug translation', 'woocommerce-multilingual' ) . '</a>';

		// Check if slug translation is enabled
		$compatible          = true;
		$permalink_structure = get_option( 'permalink_structure' );
		if ( empty( $permalink_structure )
			 && ! empty( $sitepress_settings['posts_slug_translation']['on'] )
			 && ! empty( $sitepress_settings['posts_slug_translation']['types'] )
			 && $sitepress_settings['posts_slug_translation']['types']['product'] ) {
			$compatible = false;
		}

		if ( ! $compatible && ( $pagenow == 'options-permalink.php' || ( isset( $_GET['page'] ) && $_GET['page'] == 'wpml-wcml' ) ) ) {
			$this->err_message = '<div class="message error"><p>' . $message . '    </p></div>';
			add_action( 'admin_notices', [ $this, 'plugin_notice_message' ] );
		}
	}

	public function plugin_notice_message() {
		echo $this->err_message;
	}

	public function check_wpml_config() {
		global $sitepress_settings, $sitepress, $woocommerce_wpml;

		if ( empty( $sitepress_settings ) || ! $this->check() ) {
			return;
		}

		$file = realpath( WCML_PLUGIN_PATH . '/wpml-config.xml' );
		if ( ! file_exists( $file ) ) {
			$this->xml_config_errors[] = __( 'wpml-config.xml file missing from WooCommerce Multilingual & Multicurrency folder.', 'woocommerce-multilingual' );
		} else {
			$config = icl_xml2array( file_get_contents( $file ) );

			if ( isset( $config['wpml-config'] ) ) {
				$cfs = [];

				// custom-fields
				if ( isset( $config['wpml-config']['custom-fields'] ) ) {
					if ( isset( $config['wpml-config']['custom-fields']['custom-field']['value'] ) ) { // single
						$cfs[] = $config['wpml-config']['custom-fields']['custom-field'];
					} else {
						foreach ( $config['wpml-config']['custom-fields']['custom-field'] as $cf ) {
							$cfs[] = $cf;
						}
					}

					if ( $cfs ) {
						foreach ( $cfs as $cf ) {
							if ( ! isset( $sitepress_settings['translation-management']['custom_fields_translation'][ $cf['value'] ] ) ) {
								continue;
							}

							$effective_config_value = $sitepress_settings['translation-management']['custom_fields_translation'][ $cf['value'] ];
							$correct_config_value   = $cf['attr']['action'] == 'copy' ? 1 : ( $cf['attr']['action'] == 'translate' ? 2 : 0 );

							if ( $effective_config_value != $correct_config_value ) {
								/* translators: %s is a field name */
								$this->xml_config_errors[] = sprintf( __( 'Custom field %s configuration from wpml-config.xml file was altered!', 'woocommerce-multilingual' ), '<i>' . $cf['value'] . '</i>' );
							}
						}
					}
				}

				// custom-types
				if ( isset( $config['wpml-config']['custom-types'] ) ) {
					$cts = [];

					if ( isset( $config['wpml-config']['custom-types']['custom-type']['value'] ) ) { // single
						$cts[] = $config['wpml-config']['custom-types']['custom-type'];
					} else {
						foreach ( $config['wpml-config']['custom-types']['custom-type'] as $cf ) {
							$cts[] = $cf;
						}
					}

					if ( $cts ) {
						foreach ( $cts as $ct ) {
							if ( ! isset( $sitepress_settings['custom_posts_sync_option'][ $ct['value'] ] ) ) {
								continue;
							}
							$effective_config_value = $sitepress_settings['custom_posts_sync_option'][ $ct['value'] ];
							$correct_config_value   = $ct['attr']['translate'];

							if ( 'product' === $ct['value'] && $woocommerce_wpml->products->is_product_display_as_translated_post_type() ) {
								$correct_config_value = WPML_CONTENT_TYPE_DISPLAY_AS_IF_TRANSLATED;
							}

							if ( $effective_config_value != $correct_config_value ) {
								/* translators: %s is a custom post type name */
								$this->xml_config_errors[] = sprintf( __( 'Custom type %s configuration from wpml-config.xml file was altered!', 'woocommerce-multilingual' ), '<i>' . $ct['value'] . '</i>' );
							}
						}
					}
				}

				// taxonomies
				if ( isset( $config['wpml-config']['taxonomies'] ) ) {
					$txs = [];

					if ( isset( $config['wpml-config']['taxonomies']['taxonomy']['value'] ) ) { // single
						$txs[] = $config['wpml-config']['taxonomies']['taxonomy'];
					} else {
						foreach ( $config['wpml-config']['taxonomies']['taxonomy'] as $cf ) {
							$txs[] = $cf;
						}
					}

					if ( $txs ) {
						foreach ( $txs as $tx ) {
							if ( ! isset( $sitepress_settings['taxonomies_sync_option'][ $tx['value'] ] ) ) {
								continue;
							}
							$effective_config_value = $sitepress_settings['taxonomies_sync_option'][ $tx['value'] ];
							$correct_config_value   = $tx['attr']['translate'];

							if ( method_exists( $sitepress, 'is_display_as_translated_taxonomy' ) && $sitepress->is_display_as_translated_taxonomy( $tx['value'] ) ) {
								$correct_config_value = WPML_CONTENT_TYPE_DISPLAY_AS_IF_TRANSLATED;
							}

							if ( $effective_config_value != $correct_config_value ) {
								/* translators: %s is a custom taxonomy name */
								$this->xml_config_errors[] = sprintf( __( 'Custom taxonomy %s configuration from wpml-config.xml file was altered!', 'woocommerce-multilingual' ), '<i>' . $tx['value'] . '</i>' );
							}
						}
					}
				}
			}
		}

	}

	public function required_plugin_install_link( $repository = 'wpml' ) {

		if ( class_exists( 'WP_Installer_API' ) ) {
			$url = WP_Installer_API::get_product_installer_link( $repository );
		} else {
			$url = $this->tracking_link->getWpmlHome();
		}

		return $url;
	}

}