(function(){
  const SHOW_BEFORE_FADE_MS = 750; // show briefly before fading

  function getCartSkus() {
    let skus = [];

    // 🔹 Minicart rows
    const miniRows = document.querySelectorAll(".cart-dropdown table.minicart tr.item");
    miniRows.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);
        }
      }
    });

    // 🔹 Basket page rows
    if (skus.length === 0) {
      const basketRows = document.querySelectorAll("tr.item .item_sku");
      basketRows.forEach(el => {
        const sku = el.textContent.trim();
        if (sku) skus.push(sku);
      });
    }

    return skus;
  }

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

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

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

      if (cartSkus.includes(sku)) {
        if (sessionStorage.getItem("justAdded-" + sku) === "true") {
          // Just added → show briefly, then fade
          banner.classList.add("visible");
          setTimeout(() => {
            sessionStorage.removeItem("justAdded-" + sku);
            fadeAndHide(banner);
          }, SHOW_BEFORE_FADE_MS);
        } else {
          // Already in cart from before → hide instantly
          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 when items are added to cart
  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 (not basket page)
  const target = document.querySelector(".minicart_container");
  if (target) {
    const observer = new MutationObserver(updatePromoBanners);
    observer.observe(target, { childList: true, subtree: true });
  }
})();