/* hd-commerce — Merkliste (Wunschliste) clientseitig via localStorage. */
(function () {
  var KEY = 'hdc_wishlist';
  function read() { try { return JSON.parse(localStorage.getItem(KEY) || '[]'); } catch (e) { return []; } }
  function write(c) { localStorage.setItem(KEY, JSON.stringify(c)); updateBadge(); paintButtons(); }
  function has(slug) { return read().some(function (i) { return i.slug === slug; }); }
  function toggle(item) {
    var c = read();
    var idx = c.findIndex(function (i) { return i.slug === item.slug; });
    if (idx > -1) { c.splice(idx, 1); } else { c.push(item); }
    write(c);
    return idx === -1; // true wenn jetzt gemerkt
  }
  function remove(slug) { write(read().filter(function (i) { return i.slug !== slug; })); }
  function updateBadge() {
    var b = document.getElementById('wishBadge');
    if (!b) return;
    var n = read().length;
    b.textContent = n;
    b.classList.toggle('show', n > 0);
  }
  function paintButtons() {
    document.querySelectorAll('[data-wish]').forEach(function (btn) {
      var p; try { p = JSON.parse(btn.getAttribute('data-wish') || '{}'); } catch (e) { p = {}; }
      btn.classList.toggle('active', has(p.slug));
      btn.setAttribute('aria-pressed', has(p.slug) ? 'true' : 'false');
    });
  }
  window.HDCWish = { read: read, has: has, toggle: toggle, remove: remove, count: function () { return read().length; } };
  document.addEventListener('DOMContentLoaded', function () {
    updateBadge();
    paintButtons();
    document.querySelectorAll('[data-wish]').forEach(function (btn) {
      btn.addEventListener('click', function (e) {
        e.preventDefault(); e.stopPropagation();
        var p; try { p = JSON.parse(btn.getAttribute('data-wish') || '{}'); } catch (err) { p = {}; }
        if (!p.slug) return;
        var added = toggle(p);
        if (window.HDC && window.HDC.track) { /* optional analytics */ }
        if (typeof window.hdcWishToast === 'function') window.hdcWishToast(added ? 'Gemerkt' : 'Entfernt');
      });
    });
    // Merkliste-Seite rendern, falls vorhanden
    var root = document.getElementById('wishlistRoot');
    if (root) renderList(root);
  });

  function fmt(c, cur) { try { return new Intl.NumberFormat('de-DE', { style: 'currency', currency: cur || 'EUR' }).format((c||0)/100); } catch(e){ return ((c||0)/100).toFixed(2)+' '+(cur||'EUR'); } }
  function renderList(root) {
    var cur = root.getAttribute('data-currency') || 'EUR';
    function draw() {
      var items = read();
      if (!items.length) {
        root.innerHTML = '<div class="empty-state"><h2>Deine Merkliste ist leer</h2><p>Tippe auf das Herz an einem Produkt, um es hier zu sammeln.</p><a class="btn btn-primary btn-lg" href="/shop" style="margin-top:16px">Zum Shop</a></div>';
        return;
      }
      var cards = items.map(function (p) {
        return '<div class="prod-card-wrap">' +
          '<a class="prod-card" href="/produkt/' + p.slug + '">' +
          '<div class="prod-media">' + (p.image ? '<img src="' + p.image + '" alt="" loading="lazy">' : '') + '</div>' +
          '<div class="prod-info"><span class="prod-cat">' + (p.category || '') + '</span>' +
          '<span class="prod-name">' + (p.name || '') + '</span>' +
          '<span class="prod-price">' + fmt(p.priceCents, cur) + '</span>' +
          '<span class="prod-tax">inkl. MwSt.</span></div></a>' +
          '<button class="wish-btn active" data-rm="' + p.slug + '" aria-label="Entfernen" title="Entfernen">' +
          '<svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.8" stroke-linecap="round" stroke-linejoin="round"><path d="M20.8 4.6a5.5 5.5 0 0 0-7.8 0L12 5.6l-1-1a5.5 5.5 0 0 0-7.8 7.8l1 1L12 21l7.8-7.6 1-1a5.5 5.5 0 0 0 0-7.8Z"/></svg></button></div>';
      }).join('');
      root.innerHTML = '<div class="prod-grid">' + cards + '</div>';
      root.querySelectorAll('[data-rm]').forEach(function (b) {
        b.addEventListener('click', function (e) { e.preventDefault(); remove(b.getAttribute('data-rm')); draw(); });
      });
    }
    draw();
  }
})();