<script>

 //run scripts on DOMContentLoaded to avoid affecting site load time
 window.addEventListener('DOMContentLoaded', function () {

  //Only run ajax integration if Extend and ExtendShopify is defined, the currency is set to USD and analytics are enabled
  if (window.Extend && window.ExtendShopify && window.Shopify.currency.active === 'USD' && Extend.integration.analytics) {

   /***********************/
   /* util functions */
   /***********************/

   // getPlanId - Takes in the cart and a product ID and returns the plan ID for that product
   function getPlanId(cart, productId) {
    let planId;
    cart.items.forEach(function (item) {
     if (item.properties.Ref && item.properties.Ref === productId) planId = item.sku.toString();
    })
    return planId
   }

   /***********************/
   /* end util functions */
   /***********************/

   // productAnalytics() - Takes in the product ID and quantity at the time it is added to the cart
   let productAnalytics = function (prodId, prodQty) {
    if (!prodQty) prodQty = 1;
    if (prodId) {
     Extend.trackProductAddedToCart({
      productId: prodId.toString(),
      productQuantity: parseInt(prodQty),
     });
    }
   }

   // cartAnalytics() - Takes in the oldCart and the newCart at a point where the cart updates
   let cartAnalytics = function (oldCart, newCart) {
    if (oldCart && newCart && oldCart.items && newCart.items) {
     // Triggers if an item has been removed
     if (oldCart.items.length > newCart.items.length) {
      oldCart.items.forEach(function (currentItem) {
       let productFound = false
       newCart.items.forEach(function (currentNewItem) {
        if (currentItem.id == currentNewItem.id) {
         productFound = true
        }
       })
       if (productFound === false) {
        if (currentItem.vendor === 'Extend' && currentItem && currentItem.sku && currentItem
          .properties.Ref) {
         Extend.trackOfferRemovedFromCart({
          productId: currentItem.properties.Ref.toString(),
          planId: currentItem.sku.toString(),
         });
        } else if (currentItem.id) {
         Extend.trackProductRemovedFromCart({
          productId: currentItem.id.toString(),
         })
        }
       }
      })
      // Triggers if an item quantity has changed
     } else if (oldCart.item_count != newCart.item_count) {
      oldCart.items.forEach(function (currentItem) {
       newCart.items.forEach(function (currentNewItem) {
        // Runs when the updated item is found if its not an Extend warranty
        if (currentItem.id == currentNewItem.id && currentItem.quantity != currentNewItem
          .quantity && currentItem.vendor != 'Extend') {
         if (currentItem.id && currentNewItem.quantity && ExtendShopify.warrantyAlreadyInCart(
          currentItem.id.toString(), oldCart.items)) {
          //Gets the associated plan ID using the product ID
          let planId = getPlanId(newCart, currentItem.id.toString())
          //Product has warranty in cart
          Extend.trackOfferUpdated({
           productId: currentItem.id.toString(),
           planId: planId,
           updates: {
            warrantyQuantity: parseInt(currentNewItem.quantity),
            productQuantity: parseInt(currentNewItem.quantity),
           },
          });
         } else if (currentItem.id && currentNewItem.quantity) {
          //Product has no warranty in cart
          Extend.trackProductUpdated({
           productId: currentItem.id.toString(),
           updates: {
            productQuantity: parseInt(currentNewItem.quantity),
           },
          });
         }
        }

       })
      })
     }
    }
   }

   window.Extend.integration.productAnalytics = productAnalytics;
   window.Extend.integration.cartAnalytics = cartAnalytics;
   window.Extend.integration.analytics = true;

  }
 })
</script>