function bv_tv_date($value) {
    if (!$value || !is_scalar($value)) return '';
    $value = (string) $value;
    if (preg_match('/^\d{8}$/', $value)) {
        $dt = DateTime::createFromFormat('!Ymd', $value);
        return $dt ? $dt->format('d.m.Y.') : $value;
    }
    if (preg_match('/^\d{4}-\d{2}-\d{2}$/', $value)) {
        $dt = DateTime::createFromFormat('!Y-m-d', $value);
        return $dt ? $dt->format('d.m.Y.') : $value;
    }
    return $value;
}

function bv_tv_info($label, $value) {
    if ($value === '' || $value === null || is_array($value)) return;
    echo '<div class="bv-tv-info-row"><span>' . esc_html($label) . '</span><strong>' . esc_html((string) $value) . '</strong></div>';
}

function bv_tv_render($atts = []) {
    $a = shortcode_atts(['id'=>0,'slug'=>'','url'=>''], $atts, 'bv_memorial_three_views');
    $id = bv_tv_find_id($a);
    if (!$id) return '<p>Memorijal nije pronađen. Proverite slug ili URL u shortcode-u.</p>';
    $view = isset($_GET['bv_view']) ? sanitize_key(wp_unslash($_GET['bv_view'])) : 'basic';
    if (!in_array($view, ['basic','timeline','biography'], true)) $view = 'basic';
    $title = get_the_title($id);
    $image = bv_tv_img(bv_tv_field($id, 'bv_memorial_image_1'));
    $birth = bv_tv_date(bv_tv_field($id, 'bv_birth_date'));
    $death = bv_tv_date(bv_tv_field($id, 'bv_death_date'));
    $q = get_post_meta($id, '_bv_memorial_questionnaire_v2', true);
    if (!is_array($q)) $q = [];
    $left_note = !empty($q['bv_v2_left_memorial_note']) ? $q['bv_v2_left_memorial_note'] : '';
    $message = !empty($q['bv_v2_top_main_message']) ? $q['bv_v2_top_main_message'] : bv_tv_field($id, 'bv_tagline');
    $bio = bv_tv_field($id, 'bv_biography_text');
    if (!$bio) $bio = $q['bv_v2_biography_text'] ?? '';
    $footer = !empty($q['bv_v2_bottom_memorial_text']) ? $q['bv_v2_bottom_memorial_text'] : '';
    $base = get_permalink($id);
    // Kada je shortcode na test stranici, parametar se dodaje trenutnoj stranici, ne listingu.
    $here = get_permalink(get_queried_object_id());
    if (!$here) $here = $base;
    $urls = [
        'basic' => remove_query_arg('bv_view', $here),
        'timeline' => add_query_arg('bv_view', 'timeline', $here),
        'biography' => add_query_arg('bv_view', 'biography', $here),
    ];
    ob_start();
    ?>
    <div class="bv-tv-root">
      <div class="bv-tv-layout">
        <aside class="bv-tv-sidebar">
          <div class="bv-tv-portrait">
            <div class="bv-tv-photo-empty">Fotografija</div>          </div>
          <div class="bv-tv-years">