/**
 * Add VideoObject schema entries (FV Player + YouTube) dynamically to the @graph.
 * Deduplicates, ensures fallback thumbnails, and prioritizes permanent pages over blog posts.
 */
function dc_schema_add_videos($post, &$graph) {
    global $wpdb;

    $page_url    = get_permalink($post->ID);
    $page_title  = get_the_title($post->ID);
    $page_desc   = dc_get_post_specific_description($post->ID);
    $page_date   = get_the_date('c', $post->ID);
    $mod_date    = get_the_modified_date('c', $post->ID);
    $site_url    = home_url();
    $fallback_thumbnail = 'https://dcdouglas.com/wp-content/uploads/2025/07/DC-Douglas-Film-FEstival-2024.webp';

    $video_objects = [];
    $dedup_videos  = [];

    // Handle FV Player videos
    $player_ids = $wpdb->get_col($wpdb->prepare(
        "SELECT id_player FROM {$wpdb->prefix}fv_player_playermeta WHERE meta_key = 'post_id' AND meta_value = %d",
        $post->ID
    ));

    foreach ($player_ids as $player_id) {
        $video_id_list = $wpdb->get_var($wpdb->prepare(
            "SELECT videos FROM {$wpdb->prefix}fv_player_players WHERE id = %d",
            $player_id
        ));
        if (empty($video_id_list)) continue;

        $video_ids = array_map('trim', explode(',', $video_id_list));

        foreach ($video_ids as $vid_id) {
            if (in_array($vid_id, $dedup_videos)) continue;
            $dedup_videos[] = $vid_id;

            $video = $wpdb->get_row($wpdb->prepare(
                "SELECT src, splash, title, duration, last_check FROM {$wpdb->prefix}fv_player_videos WHERE id = %d",
                $vid_id
            ));
            if (!$video || empty($video->src)) continue;

            $title = !empty($video->title) ? $video->title : "{$page_title} (Clip)";
            $desc  = !empty($page_desc) ? $page_desc : "A clip featuring D.C. Douglas.";
            $thumb = !empty($video->splash) ? $video->splash : $fallback_thumbnail;
            $uploadDate = !empty($video->last_check) ? date('c', strtotime($video->last_check)) : $page_date;

            $video_objects[] = [
                "@type"         => "VideoObject",
                "@id"           => "{$page_url}#video-{$vid_id}",
                "name"          => $title,
                "description"   => $desc,
                "thumbnailUrl"  => $thumb,
                "uploadDate"    => $uploadDate,
                "datePublished" => $page_date,
                "dateModified"  => $mod_date,
                "contentUrl"    => $page_url,
                "embedUrl"      => $video->src,
                "publisher"     => [
                    "@type" => "Organization",
                    "name"  => "D.C. Douglas Official Site",
                    "url"   => $site_url
                ],
                "author"        => [
                    "@type" => "Person",
                    "name"  => "D.C. Douglas",
                    "url"   => $site_url
                ]
            ];
        }
    }

    // Handle YouTube embeds in content
    preg_match_all('/https?:\/\/(?:www\.)?(?:youtube\.com\/watch\?v=|youtu\.be\/)([a-zA-Z0-9_-]+)/i', $post->post_content, $yt_matches);
    foreach ($yt_matches[1] as $video_id) {
        $unique_id = "yt-{$video_id}";
        if (in_array($unique_id, $dedup_videos)) continue;
        $dedup_videos[] = $unique_id;

        $video_objects[] = [
            "@type"         => "VideoObject",
            "@id"           => "{$page_url}#video-{$video_id}",
            "name"          => $page_title,
            "description"   => $page_desc,
            "thumbnailUrl"  => "https://img.youtube.com/vi/{$video_id}/hqdefault.jpg",
            "uploadDate"    => $page_date,
            "datePublished" => $page_date,
            "dateModified"  => $mod_date,
            "contentUrl"    => $page_url,
            "embedUrl"      => "https://www.youtube.com/embed/{$video_id}",
            "publisher"     => [
                "@type" => "Organization",
                "name"  => "D.C. Douglas Official Site",
                "url"   => $site_url
            ],
            "author"        => [
                "@type" => "Person",
                "name"  => "D.C. Douglas",
                "url"   => $site_url
            ]
        ];
    }

    if (!empty($video_objects)) {
        $graph = array_merge($graph, $video_objects);
    }
}

// Insert calls into each schema branch (acting, voiceover, blog)
if (function_exists('dc_schema_add_videos')) {
    // Example insertion points:
    // In Acting schema block, before $schema output
    // In Voiceover schema block, before $schema output
    // In Blog schema block, before $schema output
    // These calls would be manually placed at the actual $schema echo points:
    // dc_schema_add_videos($post, $graph);
}