import { ExclamationCircleIcon } from "@heroicons/react/24/solid";
import { useEffect, useState } from "react";
import { toast } from "react-hot-toast";
import Alert from "../../components/Alert";
import AppBar from "../../components/AppBar";
import Image from "../../components/Image";
import Layout from "../../components/Layout";
import LineDivider from "../../components/LineDivider";
import Link from "../../components/Link";
import ProgressBar from "../../components/ProgressBar";
import Spinner from "../../components/Spinner";
import apiOdoo from "../../helpers/apiOdoo";
import { useAuth } from "../../helpers/auth";
import { getCart } from "../../helpers/cart";
import currencyFormat from "../../helpers/currencyFormat";
import { createSlug } from "../../helpers/slug";


export default function Checkout() {
  const [auth] = useAuth();
  const [address, setAddress] = useState(null);
  const [selectedAddress, setSelectedAddress] = useState(null);
  const [selectedPayment, setSelectedPayment] = useState(null);
  const [products, setProducts] = useState(null);
  const [totalPriceBeforeTax, setTotalPriceBeforeTax] = useState(0);
  const [totalTaxAmount, setTotalTaxAmount] = useState(0);
  const [totalDiscountAmount, setTotalDiscountAmount] = useState(0);
  const [isLoading, setIsLoading] = useState(true);

  const payments = [
    { name: 'BCA', number: '8870-4000-81' },
    { name: 'MANDIRI', number: '155-0067-6869-75' },
  ];

  useEffect(() => {
    const getAddress = async () => {
      if (auth) {
        const dataAddress = await apiOdoo('GET', `/api/v1/user/${auth.id}/address`);
        setAddress(dataAddress);
      }
    };
    getAddress();
  }, [auth]);

  useEffect(() => {
    const getProducts = async () => {
      let cart = getCart();
      let productIds = Object
        .values(cart)
        .filter((itemCart) => itemCart.to_process == true)
        .map((itemCart) => itemCart.product_id);
      if (productIds.length > 0) {
        productIds = productIds.join(',');
        let dataProducts = await apiOdoo('GET', `/api/v1/product_variant/${productIds}`);
        dataProducts = dataProducts.map((product) => ({
          ...product,
          quantity: cart[product.id].quantity,
          to_process: cart[product.id].to_process,
        }));
        setProducts(dataProducts);
      }
    };
    getProducts();
  }, []);
  
  useEffect(() => {
    if (address) setSelectedAddress(address[0]);
  }, [address]);

  useEffect(() => {
    if (products) {
      const productsToProcess = products.filter((product) => product.to_process == true);
      let calculateTotalPriceBeforeTax = 0;
      let calculateTotalTaxAmount = 0;
      let calculateTotalDiscountAmount = 0;
      productsToProcess.forEach(product => {
        let priceBeforeTax = product.price.price / 1.11; 
        calculateTotalPriceBeforeTax += priceBeforeTax * product.quantity;
        calculateTotalTaxAmount += (product.price.price - priceBeforeTax) * product.quantity;
        calculateTotalDiscountAmount += (product.price.price - product.price.price_discount) * product.quantity;
      });
      setTotalPriceBeforeTax(calculateTotalPriceBeforeTax);
      setTotalTaxAmount(calculateTotalTaxAmount);
      setTotalDiscountAmount(calculateTotalDiscountAmount);
    }
  }, [products]);

  useEffect(() => {
    if (address && products) setIsLoading(false);
  }, [address, products]);

  return (
    <Layout>
      <AppBar title="Checkout" />

      {isLoading && (
        <div className="flex justify-center items-center gap-x-3 mt-14">
          <Spinner className="w-10 text-gray_r-8 fill-gray_r-12" />
        </div>
      )}

      { products && address && (
        <>
          <ProgressBar 
            current={2}
            labels={['Keranjang', 'Pembayaran', 'Selesai']}
          />

          <LineDivider/>

          <Alert type="info" className="text-caption-2 flex gap-x-3 items-center my-2">
            <div>
              <ExclamationCircleIcon className="w-6 text-blue-700"/>
            </div>
            <span>Jika mengalami kesulitan dalam melakukan pembelian di website Indoteknik. Hubungi kami disini</span>
          </Alert>

          <LineDivider/>

          <div className="p-4">
            <div className="flex justify-between items-center">
              <h2>Alamat Pengiriman</h2>
              <Link className="text-caption-1" href="/">Ubah Alamat</Link>
            </div>

            { selectedAddress && (
              <div className="mt-4 text-caption-1">
                <p className="font-medium">{ selectedAddress.name }</p>
                <p className="mt-2 text-gray_r-11">{ selectedAddress.mobile }</p>
                <p className="mt-1 text-gray_r-11">{ selectedAddress.street } { selectedAddress.street2 }</p>
              </div>
            ) }
          </div>

          <LineDivider/>

          <div className="p-4 flex flex-col gap-y-4">
            {products.map((product, index) => (
              <div className="flex gap-x-3" key={index}>
                <div className="w-4/12 flex items-center gap-x-2">
                  <Image
                    src={product.parent.image} 
                    alt={product.parent.name} 
                    className="object-contain object-center border border-gray_r-6 h-32 w-full rounded-md"
                  />
                </div>
                <div className="w-8/12 flex flex-col">
                  <p className="product-card__title wrap-line-ellipsis-2">
                    {product.parent.name}
                  </p>
                  <p className="text-caption-2 text-gray_r-11 mt-1">
                    {product.code || '-'}
                    {product.attributes.length > 0 ? ` | ${product.attributes.join(', ')}` : ''}
                  </p>
                  <p className="text-caption-2 text-gray_r-11 mt-1">
                    {currencyFormat(product.price.price_discount)} × {product.quantity} Barang
                  </p>
                  <p className="text-caption-2 text-gray_r-12 font-bold mt-2">
                    {currencyFormat(product.quantity * product.price.price_discount)}
                  </p>
                </div>
              </div>
            ))}
          </div>

          <LineDivider/>
          
          <div className="p-4">
            <div className="flex justify-between items-center">
              <h2>Ringkasan Pesanan</h2>
              <p className="text-gray_r-11 text-caption-1">{products.length} Barang</p>
            </div>
            <hr className="my-4 border-gray_r-6"/>
            <div className="flex flex-col gap-y-4">
              <div className="flex gap-x-2 justify-between">
                <p>Subtotal</p>
                <p className="font-medium">{currencyFormat(totalPriceBeforeTax)}</p>
              </div>
              <div className="flex gap-x-2 justify-between">
                <p>PPN 11%</p>
                <p className="font-medium">{currencyFormat(totalTaxAmount)}</p>
              </div>
              <div className="flex gap-x-2 justify-between">
                <p>Total Diskon</p>
                <p className="font-medium text-red_r-11">- {currencyFormat(totalDiscountAmount)}</p>
              </div>
            </div>
            <hr className="my-4 border-gray_r-6"/>
            <div className="flex gap-x-2 justify-between mb-4">
              <p>Grand Total</p>
              <p className="font-medium text-yellow_r-11">{currencyFormat(totalPriceBeforeTax + totalTaxAmount - totalDiscountAmount)}</p>
            </div>
            <p className="text-caption-2 text-gray_r-10 mb-2">*) Belum termasuk biaya pengiriman</p>
            <p className="text-caption-2 text-gray_r-10 leading-5">
              Dengan melakukan pembelian melalui website Indoteknik, saya menyetujui <Link href="/">Syarat & Ketentuan</Link> yang berlaku
            </p>
          </div>

          <LineDivider/>
          
          <div className="p-4">
            <h2>Pilih Metode Pembayaran</h2>
            <div className="grid gap-y-3 mt-4">
              { payments.map((payment, index) => (
                <button 
                  type="button" 
                  className={"text-left border border-gray_r-6 rounded-md p-3 " + (selectedPayment == payment.name && 'border-yellow_r-10 bg-yellow_r-3')} 
                  onClick={() => setSelectedPayment(payment.name)}
                  key={index}
                >
                  <p>{payment.name} - {payment.number}</p>
                  <p className="mt-1 text-gray_r-11">PT. Indoteknik Dotcom Gemilang</p>
                </button>
              )) }
            </div>
          </div>

          <LineDivider/>

          <div className="flex gap-x-3 p-4">
            <button 
              className="flex-1 btn-yellow"
              onClick={() => router.push('/shop/checkout')}
            >
              Bayar
            </button>
          </div>
        </>
      ) }
    </Layout>
  )
}