if (is_admin()) {
add_action('admin_menu', static function () {
if (!function_exists('bt_sw_theme_child_slugs')) return;
add_submenu_page('woocommerce', 'BT Themenwelt-Wörter', 'Themenwelt-Wörter',
'manage_woocommerce', 'bt-sw-theme-words', 'bt_sw_theme_words_admin_page');
});

add_action('admin_post_bt_sw_theme_words_save', static function () {
if (!current_user_can('manage_woocommerce')) wp_die('Keine Berechtigung.');
check_admin_referer('bt_sw_theme_words_save');
$theme = isset($_POST['theme']) ? sanitize_title(wp_unslash($_POST['theme'])) : '';
if (!function_exists('bt_sw_theme_child_slugs') || !in_array($theme, bt_sw_theme_child_slugs(), true)) wp_die('Ungültiges Thema.');
$new = [];
foreach (['buchstaben', 'zahlen'] as $pool) {
$text = isset($_POST[$pool]) ? (string) wp_unslash($_POST[$pool]) : '';
$lines = preg_split('/\r\n|\r|\n/', trim($text));
$output = [];
foreach ($lines as $line) {
if (trim($line) === '') continue;
if (!preg_match('/^\s*\d+(?:\s*[,; ]\s*\d+)*\s*$/', $line)) wp_die('Nur Produkt-IDs (durch Komma oder Leerzeichen getrennt) verwenden.');
$ids = array_values(array_filter(array_map('absint', preg_split('/[,;\s]+/', trim($line)))));
if (count($ids) > 30) wp_die('Maximal 30 Zeichen pro Wortzeile.');
foreach ($ids as $id) {
if (!bt_sw_theme_words_product_allowed($id, $pool)) {
wp_die('Produkt-ID ' . esc_html((string) $id) . ' ist kein veröffentlichter ' . esc_html($pool) . '-Artikel mit Produktbild.');
}
}
$output[] = $ids;
}
if (count($output) > 8) wp_die('Maximal acht Wortzeilen pro Pool.');
$new[$pool] = $output;
}
$all = get_option('bt_sw_theme_word_sequences', []);
if (!is_array($all)) $all = [];
$all[$theme] = $new;
update_option('bt_sw_theme_word_sequences', $all, false);
if (function_exists('bt_swatches_bump_cache_version')) bt_swatches_bump_cache_version();
wp_safe_redirect(add_query_arg(['page'=>'bt-sw-theme-words', 'theme'=>$theme, 'updated'=>'1'], admin_url('admin.php')));
exit;
});
}

if (!function_exists('bt_sw_theme_words_admin_page')) {
function bt_sw_theme_words_admin_page(): void {
if (!current_user_can('manage_woocommerce')) return;
$slugs = function_exists('bt_sw_theme_child_slugs') ? bt_sw_theme_child_slugs() : [];
$theme = isset($_GET['theme']) ? sanitize_title(wp_unslash($_GET['theme'])) : ($slugs[0] ?? '');
if (!in_array($theme, $slugs, true)) $theme = $slugs[0] ?? '';
echo '<div class="wrap">
   <h1>BT Themenwelt-Wörter</h1>';
   echo '<p>Nur gezielte Produktbilder in den vorhandenen Pools Buchstaben und Zahlen. Jede Zeile bildet ein zusammenhängendes Wort. Doppelte Produkt-IDs sind erlaubt; die globale Produktreihenfolge bleibt unverändert.</p>';
   if (isset($_GET['updated']) && $_GET['updated'] === '1') echo '<div class="notice notice-success">
      <p>Wortfolgen gespeichert.</p>
   </div>';
   echo '<form method="get"><input type="hidden" name="page" value="bt-sw-theme-words"><label for="bt-theme">Themenwelt: </label><select name="theme" id="bt-theme">';
         foreach ($slugs as $slug) echo '<option value="' . esc_attr($slug) . '" ' . selected($theme, $slug, false) . '>' . esc_html($slug) . '</option>';
         echo '</select> <button class="button">Anzeigen</button></form>
   <hr>';
   echo '<form method="post" action="' . esc_url(admin_url('admin-post.php')) . '">';
      wp_nonce_field('bt_sw_theme_words_save');
      echo '<input type="hidden" name="action" value="bt_sw_theme_words_save"><input type="hidden" name="theme" value="' . esc_attr($theme) . '">';
      foreach (['buchstaben'=>'Buchstaben', 'zahlen'=>'Zahlen'] as $pool=>$label) {
      $lines = bt_sw_theme_words_get($theme, $pool);
      $value = implode("\n", array_map(static fn($ids) => implode(', ', $ids), $lines));
      echo '<h2>' . esc_html($label) . '</h2>
      <p>Eine Wortzeile pro Zeile, Produkt-IDs durch Komma getrennt. Leer lassen = kein Pool.</p>';
      echo '<textarea name="' . esc_attr($pool) . '" rows="5" cols="85" style="max-width:100%;font-family:monospace">' . esc_textarea($value) . '</textarea>';
      if ($lines) {
      echo '<div style="display:flex;flex-direction:column;gap:8px;margin-top:10px">';
         foreach ($lines as $ids) {
         echo '<div style="display:flex;gap:5px;flex-wrap:wrap">';
            foreach ($ids as $id) echo '<span title="' . esc_attr(get_the_title($id)) . '" style="display:inline-block">' . get_the_post_thumbnail($id, [60,60]) . '<small style="display:block;text-align:center">' . (int) $id . '</small></span>';
            echo '</div>';
         }
         echo '</div>';
      }
      }
      submit_button('Wortfolgen speichern');
      echo '
   </form>
</div>';
}
}