// Title search runs entirely in the browser: the full list is already in the
// DOM, so filtering it needs no request.
(function () {
  function applyFilter() {
    var box = document.getElementById("search");
    if (!box) return;
    var needle = box.value.trim().toLowerCase();
    document.querySelectorAll(".card").forEach(function (card) {
      var title = (card.dataset.title || "").toLowerCase();
      card.hidden = needle !== "" && title.indexOf(needle) === -1;
    });
  }

  document.addEventListener("input", function (e) {
    if (e.target && e.target.id === "search") applyFilter();
  });

  // htmx replaces the list on a tab switch, so re-apply to the new cards.
  document.body.addEventListener("htmx:afterSwap", applyFilter);
})();

function setActiveTab(el) {
  el.parentElement.querySelectorAll("[role=tab]").forEach(function (t) {
    t.classList.toggle("active", t === el);
  });
}

function toggleChapterForm(key) {
  var form = document.getElementById("chapter-form-" + key);
  if (!form) return;
  form.hidden = !form.hidden;
  if (!form.hidden) form.querySelector("input").focus();
}