(function(){
  const SHOW_BEFORE_FADE_MS = 750; // how long to show before fade
  const onCartPage = window.location.pathname === "/cart";

  function getCartSkusFromMini() {
    const rows = document.querySelectorAll(".cart-dropdown table.minicart tr.item");
    const skus = [];
    rows.forEach(row => {
      const raw = row.getAttribute("data-itemobj");
      if (raw) {
        try {
          const item = JSON.parse(raw.replace(/"/g, '"'));
          if (item.item_sku) skus.push(item.item_sku);
        } catch(e) {
          console.error("Failed to parse itemobj", e);
        }
      }
    });

    // Fallback for /cart page (when minicart dropdown is disabled)
    if (skus.length === 0 && onCartPage) {
      document.querySelectorAll("tr.item .item_sku").forEach(el => {
        skus.push(el.textContent.trim());
      });
    }

    return skus;
  }

  function fadeAndHide(banner) {
    banner.classList.add("fading");
    setTimeout(() => {
      banner.classList.remove("visible", "fading");
      banner.style.display = "none";
    }, 800);
  }

  function updatePromoBanners() {
    const cartSkus = getCartSkusFromMini();

    document.querySelectorAll(".promo-banner[data-promo-sku]").forEach(banner => {
      const sku = banner.dataset.promoSku;
      if (!sku) return;

      if (cartSkus.includes(sku)) {
        if (onCartPage) {
          // On the cart page → hide immediately if in basket
          banner.classList.remove("visible");
          banner.style.display = "none";
        } else if (sessionStorage.getItem("justAdded-" + sku) === "true") {
          // Just added → show briefly then fade
          banner.classList.add("visible");
          banner.style.display = "flex";
          setTimeout(() => {
            sessionStorage.removeItem("justAdded-" + sku);
            fadeAndHide(banner);
          }, SHOW_BEFORE_FADE_MS);
        } else {
          // Already in cart elsewhere → hide immediately
          banner.classList.remove("visible");
          banner.style.display = "none";
        }
      } else {
        // Not in cart → show
        banner.classList.add("visible");
        banner.style.display = "flex";
        banner.style.opacity = "1";
      }
    });
  }

  // Track add-to-cart events
  document.querySelectorAll(".paratus-add-to-cart-btn").forEach(btn => {
    btn.addEventListener("click", () => {
      const sku = btn.dataset.itemSku;
      if (sku) {
        sessionStorage.setItem("justAdded-" + sku, "true");
      }
    });
  });

  document.addEventListener("DOMContentLoaded", updatePromoBanners);

  // Watch minicart changes
  const target = document.querySelector(".minicart_container");
  if (target) {
    const observer = new MutationObserver(updatePromoBanners);
    observer.observe(target, { childList: true, subtree: true });
  }
})();