import { ExclamationCircleIcon } from "@heroicons/react/24/solid";
import { useEffect, useState } from "react";
import Alert from "@/components/elements/Alert";
import AppBar from "@/components/layouts/AppBar";
import Image from "@/components/elements/Image";
import Layout from "@/components/layouts/Layout";
import LineDivider from "@/components/elements/LineDivider";
import Link from "@/components/elements/Link";
import ProgressBar from "@/components/elements/ProgressBar";
import Spinner from "@/components/elements/Spinner";
import apiOdoo from "@/core/utils/apiOdoo";
import { useAuth } from "@/core/utils/auth";
import { deleteItemCart, getCart } from "@/core/utils/cart";
import currencyFormat from "@/core/utils/currencyFormat";
import { getItemAddress } from "@/core/utils/address";
import { useRouter } from "next/router";
import WithAuth from "@/components/auth/WithAuth";
import { toast } from "react-hot-toast";
import getFileBase64 from "@/core/utils/getFileBase64";
import VariantCard from "@/components/variants/VariantCard";

export default function Checkout() {
  const router = useRouter();
  const [ auth ] = useAuth();
  const [ addresses, setAddresses ] = useState(null);
  const [ poNumber, setPoNumber ] = useState('');
  const [ poFile, setPoFile ] = useState('');
  const [ selectedAddress, setSelectedAddress ] = useState({
    shipping: null,
    invoicing: 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 [ finishCheckout, setFinishCheckout ] = useState(null);

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

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

  useEffect(() => {
    const getProducts = async () => {
      let cart = getCart();
      let productIds = Object
        .values(cart)
        .filter((itemCart) => itemCart.selected == 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,
          selected: cart[product.id].selected,
        }));
        setProducts(dataProducts);
      } else {
        if (auth) router.push('/shop/cart');
      }
    };
    getProducts();
  }, [router, auth]);
  
  useEffect(() => {
    if (addresses) {
      const matchAddress = (key) => {
        const addressToMatch = getItemAddress(key);
        let foundAddress = addresses.filter((address) => address.id == addressToMatch);
        if (foundAddress.length > 0) {
          return foundAddress[0];
        }
        return addresses[0];
      }
      setSelectedAddress({
        shipping: matchAddress('shipping'),
        invoicing: matchAddress('invoicing'),
      });
    };
  }, [addresses]);

  useEffect(() => {
    if (products) {
      const productsSelected = products.filter((product) => product.selected == true);
      let calculateTotalPriceBeforeTax = 0;
      let calculateTotalTaxAmount = 0;
      let calculateTotalDiscountAmount = 0;
      productsSelected.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]);

  const submit = async () => {
    if (!selectedPayment) {
      toast.error('Mohon pilih metode pembayaran', {
        position: 'bottom-center'
      });
      return;
    }
    let productOrder = products.map((product) => ({ 'product_id': product.id, 'quantity': product.quantity }));
    let data = {
      'partner_shipping_id': selectedAddress.shipping.id,
      'partner_invoice_id': selectedAddress.invoicing.id,
      'order_line': JSON.stringify(productOrder)
    };
    if (auth?.company && !poFile) {
      toast.error('Mohon isi file PO', {
        position: 'bottom-center'
      });
      return;
    };
    if (poNumber) data.po_number = poNumber;
    if (poFile) data.po_file = await getFileBase64(poFile);

    const checkoutToOdoo = await apiOdoo('POST', `/api/v1/partner/${auth.partner_id}/sale_order/checkout`, data);
    for (const product of products) {
      deleteItemCart(product.id);
    }
    setFinishCheckout(checkoutToOdoo);
  }

  return (
    <WithAuth>
      <Layout>
        <AppBar title={finishCheckout ? "Pembelian Berhasil" : "Checkout"} />

        { finishCheckout ? (
          <div className="m-4 rounded-xl bg-yellow_r-4 text-center border border-yellow_r-7">
            <div className="px-4 py-6">
              <p className="h2 mb-2">Terima Kasih atas Pembelian Anda</p>
              <p className="text-gray_r-11 mb-4 leading-6">Rincian belanja sudah kami kirimkan ke email anda. Mohon dicek kembali. jika tidak menerima email anda dapat menghubungi kami disini.</p>
              <p className="mb-2 font-medium">{ finishCheckout.name }</p>
              <p className="text-caption-2 text-gray_r-11">No. Transaksi</p>
            </div>
            <div className="bg-yellow_r-6 rounded-b-xl py-4">
              Mohon konfirmasi pembelian Anda disini
            </div>
          </div>
        ) : (
          <>
            { !products && !addresses && (
              <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 && addresses && (
              <>
                <ProgressBar 
                  current={2}
                  labels={['Keranjang', 'Pembayaran', 'Selesai']}
                />

                <LineDivider/>

                <div className="p-4">
                  <Alert type="info" className="text-caption-2 flex gap-x-3 items-center">
                    <div>
                      <ExclamationCircleIcon className="w-6 text-blue-700"/>
                    </div>
                    <span>Jika mengalami kesulitan dalam melakukan pembelian di website Indoteknik. Hubungi kami disini</span>
                  </Alert>
                </div>

                <LineDivider/>

                <div className="p-4">
                  <div className="flex justify-between items-center">
                    <h2>Alamat Pengiriman</h2>
                    <Link className="text-caption-1" href="/my/address?select=shipping">Pilih Alamat Lain</Link>
                  </div>

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

                <LineDivider/>

                <div className="p-4 flex flex-col gap-y-4">
                  {products.map((product, index) => (
                    <VariantCard
                      data={product}
                      openOnClick={false}
                      key={index}
                    />
                  ))}
                </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">
                  <div className="flex justify-between items-center">
                    <h2>Alamat Penagihan</h2>
                    <Link className="text-caption-1" href="/my/address?select=invoicing">Pilih Alamat Lain</Link>
                  </div>

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

                <LineDivider/>
                
                <div className="p-4">
                  <h2>Metode Pembayaran <span className="font-normal text-gray_r-11">(Wajib dipilih)</span></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="p-4">
                  <h2>Purchase Order</h2>

                  <div className="mt-4 flex gap-x-3">
                    <div className="w-6/12">
                      <label className="form-label font-normal">Nomor PO</label>
                      <input 
                        type="text" 
                        className="form-input mt-2 h-12"  
                        value={poNumber} 
                        onChange={(e) => setPoNumber(e.target.value)} 
                      />
                    </div>
                    <div className="w-6/12">
                      <label className="form-label font-normal">
                        File PO
                        {auth?.company && (
                          <span className="font-normal text-gray_r-11 ml-1">(Wajib diisi)</span>
                        )}
                      </label>
                      <input 
                        type="file" 
                        className="form-input mt-2 h-12" 
                        accept="image/*,application/pdf" 
                        onChange={(e) => setPoFile(e.target.files[0])}
                      />
                    </div>
                  </div>
                </div>

                <LineDivider/>

                <div className="flex gap-x-3 p-4">
                  <button 
                    className="flex-1 btn-yellow"
                    onClick={submit}
                  >
                    Bayar
                  </button>
                </div>
              </>
            ) }
          </>
        ) }
      </Layout>
    </WithAuth>
  )
}