/* =========================================================================
   faq.js — search, category filter, accordion for the dreamy help center
   • Search: case-insensitive, matches question OR answer text, real-time.
   • Categories: pill filters via data-category; "All" resets.
   • Accordion: single-open (opening one closes others), ARIA-aware,
     keyboard accessible (buttons are real <button>s).
   • Honours prefers-reduced-motion (CSS handles the transition skip).
   ========================================================================= */
(function () {
  'use strict';

  var list = document.getElementById('faq-list');        // accordion list
  var search = document.getElementById('faq-search');    // search input
  var cats = Array.from(document.querySelectorAll('.faq-cat')); // pill buttons
  var empty = document.getElementById('faq-empty');      // no-results state
  var count = document.getElementById('faq-count');      // optional count text
  if (!list) return;                                     // not on FAQ page

  var items = Array.from(list.querySelectorAll('.faq-item')); // all Q/A cards
  var currentCat = 'all';                               // active filter

  /* ---- accordion: toggle one, close the rest --------------------------- */
  function toggle(item) {
    var isOpen = item.getAttribute('data-open') === 'true';
    // single-open behaviour: close everything first
    items.forEach(function (it) {
      it.setAttribute('data-open', 'false');
      var btn = it.querySelector('.faq-q');
      if (btn) btn.setAttribute('aria-expanded', 'false');
    });
    // if it was closed, open it now
    if (!isOpen) {
      item.setAttribute('data-open', 'true');
      var b = item.querySelector('.faq-q');
      if (b) b.setAttribute('aria-expanded', 'true');
    }
  }

  // wire each question button
  items.forEach(function (item) {
    var btn = item.querySelector('.faq-q');
    if (btn) btn.addEventListener('click', function () { toggle(item); });
  });

  /* ---- apply current search + category, update visibility -------------- */
  function applyFilter() {
    var q = (search.value || '').trim().toLowerCase();  // search term
    var shown = 0;
    items.forEach(function (item) {
      var cat = item.getAttribute('data-category');     // item's category
      var text = (item.textContent || '').toLowerCase(); // q + a combined
      var matchCat = currentCat === 'all' || cat === currentCat;
      var matchSearch = !q || text.indexOf(q) !== -1;    // case-insensitive
      var visible = matchCat && matchSearch;
      item.setAttribute('data-hidden', visible ? 'false' : 'true');
      if (visible) shown++;
    });
    // show / hide the empty state
    if (empty) empty.style.display = shown === 0 ? 'block' : 'none';
    if (count) count.textContent = shown;               // update live count
  }

  /* ---- search input (real-time, debounced lightly) --------------------- */
  var t;
  search.addEventListener('input', function () {
    clearTimeout(t);
    t = setTimeout(applyFilter, 80);                    // tiny debounce
  });

  /* ---- category pills -------------------------------------------------- */
  cats.forEach(function (pill) {
    pill.addEventListener('click', function () {
      currentCat = pill.getAttribute('data-cat');       // set active cat
      cats.forEach(function (p) {
        p.setAttribute('aria-pressed', p === pill ? 'true' : 'false');
      });
      applyFilter();
    });
  });

  /* ---- keyboard: "/" focuses search, Escape clears --------------------- */
  document.addEventListener('keydown', function (e) {
    if (e.key === '/' && document.activeElement !== search) {
      e.preventDefault();
      search.focus();
    } else if (e.key === 'Escape' && document.activeElement === search) {
      search.value = '';
      applyFilter();
      search.blur();
    }
  });

  // initial paint
  applyFilter();
})();