/* hd-commerce — Storefront Cart (vanilla, localStorage) */
(function () {
  var KEY = 'hdc_cart';
  function read() { try { return JSON.parse(localStorage.getItem(KEY) || '[]'); } catch (e) { return []; } }
  function write(c) { localStorage.setItem(KEY, JSON.stringify(c)); updateBadge(); }
  function count() { return read().reduce(function (s, i) { return s + (i.qty || 1); }, 0); }
  function updateBadge() {
    var b = document.getElementById('cartBadge');
    if (!b) return;
    var n = count();
    b.textContent = n;
    b.classList.toggle('show', n > 0);
  }
  function track(type, value, meta) {
    try {
      fetch('/api/track', { method: 'POST', headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify({ type: type, path: location.pathname, value_cents: value || 0, meta: meta || {} }) });
    } catch (e) {}
  }
  function add(item) {
    var c = read();
    var ex = c.find(function (i) { return i.slug === item.slug && (i.sku || '') === (item.sku || '') && i.size === item.size; });
    if (ex) ex.qty += item.qty || 1; else c.push(item);
    write(c);
    track('add_to_cart', (item.priceCents || 0) * (item.qty || 1), { slug: item.slug });
    toast(item.name + ' wurde hinzugefügt');
  }
  function toast(msg) {
    var t = document.createElement('div');
    t.textContent = msg;
    t.style.cssText = 'position:fixed;bottom:24px;left:50%;transform:translateX(-50%);background:var(--ink);color:#fff;padding:12px 22px;border-radius:999px;font-size:14px;font-weight:600;z-index:200;box-shadow:0 8px 30px rgba(0,0,0,.2);transition:.3s;opacity:0';
    document.body.appendChild(t);
    requestAnimationFrame(function () { t.style.opacity = '1'; });
    setTimeout(function () { t.style.opacity = '0'; setTimeout(function () { t.remove(); }, 320); }, 2000);
  }
  window.HDC = {
    read: read, write: write, count: count, add: add, track: track,
    remove: function (idx) { var c = read(); c.splice(idx, 1); write(c); },
    setQty: function (idx, q) { var c = read(); if (c[idx]) { c[idx].qty = Math.max(1, q); write(c); } },
    clear: function () { write([]); },
    subtotal: function () { return read().reduce(function (s, i) { return s + (i.priceCents || 0) * (i.qty || 1); }, 0); }
  };
  document.addEventListener('DOMContentLoaded', function () {
    updateBadge();
    document.querySelectorAll('[data-add-to-cart]').forEach(function (btn) {
      btn.addEventListener('click', function () {
        if (btn.disabled) return;
        var p = JSON.parse(btn.getAttribute('data-product') || '{}');
        if (p.hasVariants) {
          if (!p.variant || !p.variant.options) { var st = document.getElementById('variantStatus'); if (st) { st.textContent = 'Bitte zuerst eine Variante wählen.'; st.style.color = '#b3261e'; } return; }
          var label = Object.keys(p.variant.options).map(function (k) { return p.variant.options[k]; }).join(' / ');
          add({ slug: p.slug, name: p.name, size: label, priceCents: p.priceCents, image: p.image, qty: 1, sku: p.variant.sku || '', variant: p.variant.options, options: p.variant.options });
          return;
        }
        var sizeSel = document.querySelector('.size-chip.active');
        var size = sizeSel ? sizeSel.getAttribute('data-size') : (p.sizes && p.sizes[0]) || 'One Size';
        add({ slug: p.slug, name: p.name, size: size, priceCents: p.priceCents, image: p.image, qty: 1 });
      });
    });
    document.querySelectorAll('.size-chip').forEach(function (chip) {
      chip.addEventListener('click', function () {
        document.querySelectorAll('.size-chip').forEach(function (c) { c.classList.remove('active'); });
        chip.classList.add('active');
      });
    });
    var pv = document.getElementById('pdpData');
    if (pv) track('product_view', 0, { slug: pv.getAttribute('data-slug') });
  });
})();