export default function useOrderInfo({ activeCartId, activeCart, activeCartItems, addresses, getAddresses, subtotal }) {
  const orderInfo = ref({
    address: null,
    receiver_name: null,
    receiver_phone: null,
    shipping_fee: null,
    deliveryMethod: null,
    paymentMethod: null,
  });

  const total = computed(() => subtotal.value + orderInfo.value.shipping_fee);

  watch(activeCartId, () => {
    // reset fields when tab is switched
    orderInfo.value.deliveryMethod = null;
    orderInfo.value.paymentMethod = null;
  });

  watch(activeCart, async (newVal, oldVal) => {
    // set order info
    if (newVal?.customer) {
      await getAddresses();
      if (!oldVal || !oldVal.customer || oldVal.customer !== newVal.customer) {
        const defaultAddress = addresses.value.find((add) => add.is_default);
        orderInfo.value.address = defaultAddress;
        orderInfo.value.receiver_name = newVal.customer__fullname;
        orderInfo.value.receiver_phone = newVal.customer__phone;
      }
    } else {
      addresses.value = null;
      orderInfo.value.address = null;
      orderInfo.value.receiver_name = null;
      orderInfo.value.receiver_phone = null;
    }
  });

  watch(
    () => orderInfo.value.deliveryMethod,
    (newVal) => {
      if (newVal?.code === "HOME_DELIVERY") {
        const defaultAddress = addresses.value.find((add) => add.is_default);
        orderInfo.value.address = defaultAddress;
      }
    },
  );

  const isOrderValid = computed(() => {
    if (activeCartItems.value?.length === 0) return false;
    if (!activeCart.value?.customer) return false;
    if (!orderInfo.value.deliveryMethod) return false;
    if (!orderInfo.value.paymentMethod) return false;
    if (orderInfo.value.deliveryMethod.code === "HOME_DELIVERY" && !orderInfo.value.address) return false;

    return true;
  });

  const fullAddress = computed(() => {
    if (!orderInfo.value.address) return "";
    return `${orderInfo.value.address.address_detail}, ${orderInfo.value.address.ward}, ${orderInfo.value.address.district}, ${orderInfo.value.address.city}`;
  });

  return { orderInfo, isOrderValid, fullAddress, total };
}