<?php

namespace SEOPress\Services\Sitemap\Render;

defined('ABSPATH') or exit('Cheatin&#8217; uh?');

class Single {
    const NAME_SERVICE = 'SitemapRenderSingle';

    /**
     * @since 4.3.0
     *
     * @return void
     */
    protected function hooksWPMLCompatibility() {
        if (defined('ICL_SITEPRESS_VERSION')) {
            //If multidomain setup
            if ( 2 == apply_filters( 'wpml_setting', false, 'language_negotiation_type' ) ) {
                //Home URL
                add_filter('seopress_sitemaps_home_url', function($home_url) {
                    $home_url = apply_filters( 'wpml_home_url', get_option( 'home' ));
                    return trailingslashit($home_url);
                });
            }

            add_filter('seopress_sitemaps_single_query', function ($args) {
                global $sitepress, $sitepress_settings;

                $sitepress_settings['auto_adjust_ids'] = 0;
                remove_filter('terms_clauses', [$sitepress, 'terms_clauses']);
                remove_filter('category_link', [$sitepress, 'category_link_adjust_id'], 1);

                //If multidomain setup
                if ( 2 == apply_filters( 'wpml_setting', false, 'language_negotiation_type' ) ) {
                    $args['suppress_filters'] = false;
                }

                return $args;
            });

            add_filter('wpml_get_home_url', 'seopress_remove_wpml_home_url_filter', 20, 5);
            add_action('the_post', function ($post) {
                $language = apply_filters('wpml_element_language_code', null, [
                    'element_id'   => $post->ID,
                    'element_type' => 'page',
                ]);
                do_action('wpml_switch_language', $language);
            });
        }

        add_filter('seopress_sitemaps_single_url', function($url, $post) {
            //Exclude custom canonical from sitemaps
            if (get_post_meta($post->ID, '_seopress_robots_canonical', true) && htmlspecialchars(urldecode(get_permalink( $post->ID))) !== get_post_meta($post->ID, '_seopress_robots_canonical', true)) {
                return null;
            }

            //If noindex, continue to next post
            if (get_post_meta($post->ID, '_seopress_robots_index', true) ==='yes') {
                return null;
            }

            //Exclude hidden languages
            //@credits WPML compatibility team
            if (function_exists('icl_object_id') && defined('ICL_SITEPRESS_VERSION')) { //WPML
                global $sitepress, $sitepress_settings;

                // Check that at least ID is set in post object.
                if ( ! isset( $post->ID ) ) {
                    return $url;
                }

                // Get list of hidden languages.
                $hidden_languages = $sitepress->get_setting( 'hidden_languages', array() );

                // If there are no hidden languages return original URL.
                if ( empty( $hidden_languages ) ) {
                    return $url;
                }

                // Get language information for post.
                $language_info = $sitepress->post_translations()->get_element_lang_code( $post->ID );

                // If language code is one of the hidden languages return null to skip the post.
                if ( in_array( $language_info, $hidden_languages, true ) ) {
                    return null;
                }
            }

            return $url;
        }, 10, 2);
    }

    /**
     * @since 4.3.0
     *
     * @return void
     */
    public function render() {
        if ( ! function_exists('seopress_get_service')) {
            return;
        }

        seopress_get_service('SitemapHeaders')->printHeaders();

        //Remove primary category
        remove_filter('post_link_category', 'seopress_titles_primary_cat_hook', 10, 3);

        $this->hooksWPMLCompatibility();

        ob_start();
        include_once SEOPRESS_TEMPLATE_SITEMAP_DIR . '/single.php';
        $xml = ob_get_contents();
        ob_end_clean();

        echo apply_filters('seopress_sitemaps_xml_single', $xml);
    }
}