/* Cart is a single subscription slot, not a general-purpose multi-item cart:
 * these are recurring subscriptions to one product, so picking a different
 * tier replaces whatever was in the cart rather than stacking two recurring
 * charges. add()/remove() are still distinct actions per the spec. */
(function () {
  var STORAGE_KEY = 'militia_cart';

  function readCart() {
    try {
      var raw = localStorage.getItem(STORAGE_KEY);
      return raw ? JSON.parse(raw) : null;
    } catch (e) {
      return null;
    }
  }

  function writeCart(item) {
    if (item) {
      localStorage.setItem(STORAGE_KEY, JSON.stringify(item));
    } else {
      localStorage.removeItem(STORAGE_KEY);
    }
    updateBadge();
  }

  function addPlan(planKey) {
    var cfg = window.MILITIA_CONFIG.plans[planKey];
    if (!cfg) return;
    writeCart({ planKey: planKey, name: cfg.name, price: cfg.price, installs: cfg.installs });
  }

  function removeItem() {
    writeCart(null);
  }

  function updateBadge() {
    var badge = document.getElementById('cartCountBadge');
    if (!badge) return;
    var cart = readCart();
    if (cart) {
      badge.textContent = '1';
      badge.classList.remove('d-none');
    } else {
      badge.classList.add('d-none');
    }
  }

  window.MilitiaCart = {
    get: readCart,
    addPlan: addPlan,
    remove: removeItem,
    updateBadge: updateBadge
  };
})();