/**
 * SamuderaKepri Advanced SEO & Multi-Schema Suite (Anti-Syntax Error)
 * Dioptimalkan dengan pembersihan teks ketat untuk portal berita
 */
if ( ! function_exists( 'samudera_seo_master_head' ) ) {
    function samudera_seo_master_head() {
        if ( ! is_singular( 'post' ) ) {
            return;
        }

        // PENGAMAN: Mencegah eksekusi ganda agar output JSON-LD tidak duplikat
        static $schema_rendered = false;
        if ( $schema_rendered ) {
            return;
        }
        $schema_rendered = true;

        global $post;
        if ( empty( $post ) || ! isset( $post->ID ) ) {
            return;
        }

        $post_id       = $post->ID;
        $post_title    = get_the_title( $post_id );
        $post_excerpt  = get_the_excerpt( $post_id );
        
        // PEMBERSIHAN KETAT: Menghilangkan karakter perusak JSON dari teks berita
        $raw_content   = wp_strip_all_tags( $post->post_content );
        $post_content  = preg_replace( '/[\r\n\t]+/', ' ', $raw_content );
        $post_content  = str_replace( '"', "'", $post_content ); // Ganti kutip ganda jadi kutip satu
        $post_content  = wp_kses_data( $post_content );

        $post_url      = esc_url( get_permalink( $post_id ) );
        $site_name     = sanitize_text_field( get_bloginfo( 'name' ) );
        $publish_date  = get_the_date( 'c', $post_id );
        $modified_date = get_the_modified_date( 'c', $post_id );
        $author_name   = get_the_author_meta( 'display_name', $post->post_author );
        $author_url    = get_author_posts_url( $post->post_author );

        // Featured Image
        $featured_image_url = '';
        $img_width  = 1024;
        $img_height = 683;
        if ( has_post_thumbnail( $post_id ) ) {
            $thumb_id           = get_post_thumbnail_id( $post_id );
            $featured_image_url = wp_get_attachment_image_url( $thumb_id, 'large' );
            $image_meta         = wp_get_attachment_metadata( $thumb_id );
            if ( $image_meta ) {
                $img_width  = isset( $image_meta['width'] ) ? $image_meta['width'] : 1024;
                $img_height = isset( $image_meta['height'] ) ? $image_meta['height'] : 683;
            }
        }
        if ( empty( $featured_image_url ) ) {
            $featured_image_url = esc_url( get_site_icon_url() );
        }

        $clean_excerpt = $post_excerpt ? $post_excerpt : wp_trim_words( $post_content, 30 );
        $clean_excerpt = str_replace( '"', "'", $clean_excerpt );

        // 1. CANONICAL TAG
        echo '<link rel="canonical" href="' . esc_attr( $post_url ) . '" />' . "\n";

        // 2. OPEN GRAPH & TWITTER CARDS
        echo '<!-- Open Graph & Twitter Meta Tags -->' . "\n";
        echo '<meta property="og:type" content="article" />' . "\n";
        echo '<meta property="og:title" content="' . esc_attr( $post_title ) . '" />' . "\n";
        echo '<meta property="og:description" content="' . esc_attr( $clean_excerpt ) . '" />' . "\n";
        echo '<meta property="og:url" content="' . esc_attr( $post_url ) . '" />' . "\n";
        echo '<meta property="og:image" content="' . esc_attr( $featured_image_url ) . '" />' . "\n";
        echo '<meta property="og:image:width" content="' . absint( $img_width ) . '" />' . "\n";
        echo '<meta property="og:image:height" content="' . absint( $img_height ) . '" />' . "\n";
        echo '<meta property="og:site_name" content="' . esc_attr( $site_name ) . '" />' . "\n";
        echo '<meta property="article:published_time" content="' . esc_attr( $publish_date ) . '" />' . "\n";
        echo '<meta property="article:modified_time" content="' . esc_attr( $modified_date ) . '" />' . "\n";
        
        echo '<meta name="twitter:card" content="summary_large_image" />' . "\n";
        echo '<meta name="twitter:title" content="' . esc_attr( $post_title ) . '" />' . "\n";
        echo '<meta name="twitter:description" content="' . esc_attr( $clean_excerpt ) . '" />' . "\n";
        echo '<meta name="twitter:image" content="' . esc_attr( $featured_image_url ) . '" />' . "\n";

        // 3. MULTI-SCHEMA STRUCTURED DATA (3 Jenis Skema: NewsArticle, Organization, BreadcrumbList)
        $categories       = get_the_category( $post_id );
        $primary_category = ! empty( $categories ) ? $categories[0]->name : 'News';
        $primary_cat_url  = ! empty( $categories ) ? get_category_link( $categories[0]->term_id ) : home_url( '/' );
        
        $tags     = get_the_tags( $post_id );
        $keywords = '';
        if ( ! empty( $tags ) ) {
            $tag_names = wp_list_pluck( $tags, 'name' );
            $keywords  = implode( ', ', array_slice( $tag_names, 0, 5 ) );
        }

        $logo_url = esc_url( get_site_icon_url() );
        if ( empty( $logo_url ) ) {
            $logo_url = esc_url( home_url( '/wp-content/uploads/2026/06/cropped-logo-sk-icon.webp' ) );
        }

        // Skema 1: NewsArticle
        $news_schema = array(
            '@context'      => 'https://schema.org',
            '@type'         => 'NewsArticle',
            '@id'           => $post_url . '#newsarticle',
            'headline'      => sanitize_text_field( $post_title ),
            'description'   => $clean_excerpt,
            'articleBody'   => $post_content,
            'datePublished' => esc_attr( $publish_date ),
            'dateModified'  => esc_attr( $modified_date ),
            'inLanguage'    => 'id-ID',
            'isAccessibleForFree' => true,
            'articleSection'      => sanitize_text_field( $primary_category ),
            'mainEntityOfPage'    => array(
                '@type' => 'WebPage',
                '@id'   => $post_url
            ),
            'author'        => array(
                '@type' => 'Person',
                'name'  => sanitize_text_field( $author_name ),
                'url'   => esc_url( $author_url )
            ),
            'publisher'     => array(
                '@type'  => 'Organization',
                'name'   => sanitize_text_field( $site_name ),
                'url'    => esc_url( home_url( '/' ) ),
                'logo'   => array(
                    '@type'  => 'ImageObject',
                    'url'    => $logo_url,
                    'width'  => 200,
                    'height' => 200
                )
            )
        );

        if ( ! empty( $featured_image_url ) ) {
            $news_schema['image'] = array(
                '@type'  => 'ImageObject',
                'url'    => esc_url( $featured_image_url ),
                'width'  => absint( $img_width ),
                'height' => absint( $img_height )
            );
        }

        if ( ! empty( $keywords ) ) {
            $news_schema['keywords'] = esc_attr( $keywords );
        }

        // Skema 2: Organization
        $org_schema = array(
            '@context' => 'https://schema.org',
            '@type'    => 'Organization',
            'name'     => sanitize_text_field( $site_name ),
            'url'      => esc_url( home_url( '/' ) ),
            'logo'     => array(
                '@type'  => 'ImageObject',
                'url'    => $logo_url,
                'width'  => 200,
                'height' => 200
            )
        );

        // Skema 3: BreadcrumbList
        $breadcrumb_schema = array(
            '@context' => 'https://schema.org',
            '@type'    => 'BreadcrumbList',
            'itemListElement' => array(
                array(
                    '@type'    => 'ListItem',
                    'position' => 1,
                    'name'     => 'Beranda',
                    'item'     => esc_url( home_url( '/' ) )
                ),
                array(
                    '@type'    => 'ListItem',
                    'position' => 2,
                    'name'     => sanitize_text_field( $primary_category ),
                    'item'     => esc_url( $primary_cat_url )
                ),
                array(
                    '@type'    => 'ListItem',
                    'position' => 3,
                    'name'     => sanitize_text_field( $post_title ),
                    'item'     => $post_url
                )
            )
        );

        // Gabungkan 3 Skema
        $combined_schema = array(
            '@context' => 'https://schema.org',
            '@graph'   => array(
                $news_schema,
                $org_schema,
                $breadcrumb_schema
            )
        );

        $json_ld = wp_json_encode( $combined_schema, JSON_UNESCAPED_SLASHES | JSON_UNESCAPED_UNICODE | JSON_HEX_TAG | JSON_HEX_AMP | JSON_HEX_APOS | JSON_HEX_QUOT );
        if ( json_last_error() === JSON_ERROR_NONE && ! empty( $json_ld ) ) {
            echo '<script type="application/ld+json">' . "\n" . $json_ld . "\n" . '</script>' . "\n";
        }
    }
    add_action( 'wp_head', 'samudera_seo_master_head', 5 );
}