<?php

use function WPML\Container\make;
use WPML\API\Sanitize;

class WCML_Cart_Switch_Lang_Functions implements \IWPML_Frontend_Action, \IWPML_Backend_Action {

	private $lang_from;

	private $lang_to;

	public function add_hooks() {
		add_action( 'wp_footer', [ $this, 'wcml_language_switch_dialog' ] );
		add_action( 'wp_loaded', [ $this, 'wcml_language_force_switch' ] );
		add_action( 'wcml_user_switch_language', [ $this, 'language_has_switched' ], 10, 2 );

		add_filter( 'woocommerce_product_add_to_cart_url', [ $this, 'remove_force_switch_from_add_to_cart_url' ] );
	}

	public function remove_force_switch_from_add_to_cart_url( $url ) {
		$url = str_replace( 'force_switch=1&', '', $url );
		return $url;
	}

	public function language_has_switched( $lang_from, $lang_to ) {

		$settings = get_option( '_wcml_settings' );

		if (
			! isset( $_GET['force_switch'] ) &&
			$lang_from !== $lang_to &&
			! empty( $settings ) &&
			WCML_CART_CLEAR === $settings['cart_sync']['lang_switch']
		) {
			$this->lang_from = $lang_from;
			$this->lang_to   = $lang_to;
		}
	}

	public function wcml_language_force_switch() {
		global $woocommerce_wpml, $woocommerce;

		if ( ! wpml_is_ajax() && isset( $_GET['force_switch'] ) && '1' === $_GET['force_switch'] ) {
			$woocommerce_wpml->cart->empty_cart_if_needed( 'lang_switch' );
			$woocommerce->session->set( 'wcml_switched_type', 'lang_switch' );
		}
	}

	public function wcml_language_switch_dialog() {
		global $woocommerce_wpml, $sitepress, $post;

		if ( make( WCML_Dependencies::class )->check() ) {
			$current_url = $this->get_current_url();

			if ( is_shop() ) {
				$requested_page_id = apply_filters( 'wpml_object_id', wc_get_page_id( 'shop' ), 'post', true, $this->lang_from );
			} elseif ( isset( $post->ID ) ) {
				$requested_page_id = apply_filters( 'wpml_object_id', $post->ID, get_post_type( $post->ID ), true, $this->lang_from );
			}

			if ( isset( $requested_page_id ) ) {
				$request_url = add_query_arg( 'force_switch', '0', $sitepress->convert_url( get_permalink( $requested_page_id ), $this->lang_from ) );
			} else {
				$request_url = $current_url;
			}

			$cart_for_session = false;
			if ( WC()->cart instanceof WC_Cart ) {
				$cart_for_session = WC()->cart->get_cart_for_session();
			}

			if ( $this->lang_from && $this->lang_to && $request_url && ! empty( $cart_for_session ) ) {

				$force_cart_url   = add_query_arg( 'force_switch', '1', $current_url );
				$active_languages = apply_filters( 'wpml_active_languages', null, null );
				$dialog_title     = __( 'Switching language?', 'woocommerce-multilingual' );

				$confirmation_message = sprintf(
					/* translators: %s is a language name */
					__(
						"You've switched the language and there are items in the cart. If you keep the %s language, the cart will be emptied and you will have to add the items again to the cart.",
						'woocommerce-multilingual'
					),
					$active_languages[ $this->lang_to ]['translated_name']
				);
				/* translators: %s is a language name */
				$stay_in = sprintf( __( 'Keep %s', 'woocommerce-multilingual' ), $active_languages[ $this->lang_to ]['translated_name'] );
				/* translators: %s is a language name */
				$switch_to = sprintf( __( 'Switch back to %s', 'woocommerce-multilingual' ), $active_languages[ $this->lang_from ]['translated_name'] );

				$woocommerce_wpml->cart->cart_alert( $dialog_title, $confirmation_message, $stay_in, $switch_to, $force_cart_url, $request_url, true );
			}
		}

	}

	public function get_current_url() {
		$get_query = $_GET;

		foreach ( $get_query as $index => $item ) {
			$get_query[ $index ] = Sanitize::string( $item );
		}

		return home_url( add_query_arg( $get_query ) );
	}
}
