import Link from '@/core/components/elements/Link/Link'
import useCart from '../hooks/useCart'
import Image from '@/core/components/elements/Image/Image'
import currencyFormat from '@/core/utils/currencyFormat'
import { useEffect, useState } from 'react'
import { deleteItemCart, getItemCart, updateItemCart } from '@/core/utils/cart'
import { CheckIcon, TrashIcon } from '@heroicons/react/24/outline'
import { createSlug } from '@/core/utils/slug'
import { useRouter } from 'next/router'
import BottomPopup from '@/core/components/elements/Popup/BottomPopup'
import { toast } from 'react-hot-toast'
import Spinner from '@/core/components/elements/Spinner/Spinner'
import Alert from '@/core/components/elements/Alert/Alert'
import MobileView from '@/core/components/views/MobileView'
import DesktopView from '@/core/components/views/DesktopView'

const Cart = () => {
  const router = useRouter()
  const [products, setProducts] = useState(null)
  const { cart } = useCart({ enabled: !products })

  const [totalPriceBeforeTax, setTotalPriceBeforeTax] = useState(0)
  const [totalTaxAmount, setTotalTaxAmount] = useState(0)
  const [totalDiscountAmount, setTotalDiscountAmount] = useState(0)

  const [deleteConfirmation, setDeleteConfirmation] = useState(null)

  useEffect(() => {
    if (cart.data && !products) {
      const productsWithQuantity = cart.data.map((product) => {
        const productInCart = getItemCart({ productId: product.id })
        if (!productInCart) return
        return {
          ...product,
          quantity: productInCart.quantity,
          selected: productInCart.selected
        }
      })
      setProducts(productsWithQuantity)
    }
  }, [cart, products])

  useEffect(() => {
    if (!products) return

    let calculateTotalPriceBeforeTax = 0
    let calculateTotalTaxAmount = 0
    let calculateTotalDiscountAmount = 0
    for (const product of products) {
      if (product.quantity == '') continue
      updateItemCart({
        productId: product.id,
        quantity: product.quantity,
        selected: product.selected
      })

      if (!product.selected) continue
      let priceBeforeTax = product.price.price / 1.11
      calculateTotalPriceBeforeTax += priceBeforeTax * product.quantity
      calculateTotalTaxAmount += (product.price.price - priceBeforeTax) * product.quantity
      calculateTotalDiscountAmount +=
        (product.price.price - product.price.priceDiscount) * product.quantity
    }
    setTotalPriceBeforeTax(calculateTotalPriceBeforeTax)
    setTotalTaxAmount(calculateTotalTaxAmount)
    setTotalDiscountAmount(calculateTotalDiscountAmount)
  }, [products])

  const updateQuantity = (value, productId, operation = '') => {
    let productIndex = products.findIndex((product) => product.id == productId)
    if (productIndex < 0) return

    let productsToUpdate = products
    let quantity = productsToUpdate[productIndex].quantity
    if (value != '' && isNaN(parseInt(value))) return
    value = value != '' ? parseInt(value) : ''
    switch (operation) {
      case 'PLUS':
        quantity += value
        break
      case 'MINUS':
        if (quantity - value < 1) return
        quantity -= value
        break
      case 'BLUR':
        if (value != '') return
        quantity = 1
        break
      default:
        quantity = value
        break
    }
    productsToUpdate[productIndex].quantity = quantity
    setProducts([...productsToUpdate])
  }

  const toggleSelected = (productId) => {
    let productIndex = products.findIndex((product) => product.id == productId)
    if (productIndex < 0) return

    let productsToUpdate = products
    productsToUpdate[productIndex].selected = !productsToUpdate[productIndex].selected
    setProducts([...productsToUpdate])
  }

  const selectedProduct = () => {
    if (!products) return []
    return products?.filter((product) => product.selected == true)
  }

  const deleteProduct = (productId) => {
    const productsToUpdate = products.filter((product) => product.id != productId)
    deleteItemCart({ productId })
    setDeleteConfirmation(null)
    setProducts([...productsToUpdate])
    toast.success('Berhasil menghapus barang dari keranjang')
  }

  return (
    <>
      <MobileView>
        <div className='pt-4'>
          <div className='flex justify-between mb-4 px-4'>
            <h1 className='font-semibold'>Daftar Produk Belanja</h1>
            <Link href='/'>Cari Produk Lain</Link>
          </div>

          <div className='flex flex-col gap-y-4 h-screen'>
            {cart.isLoading && (
              <div className='flex justify-center my-4'>
                <Spinner className='w-6 text-gray_r-12/50 fill-gray_r-12' />
              </div>
            )}

            {!cart.isLoading && (!products || products?.length == 0) && (
              <div className='px-4'>
                <Alert className='text-center my-2' type='info'>
                  Keranjang belanja anda masih kosong
                </Alert>
              </div>
            )}

            {products?.map((product) => (
              <div key={product?.id} className='flex mx-4'>
                <button
                  type='button'
                  className='flex items-center mr-2'
                  onClick={() => toggleSelected(product.id)}
                >
                  {!product?.selected && (
                    <div className='w-5 h-5 border border-gray_r-11 rounded' />
                  )}
                  {product?.selected && <CheckIcon className='border bg-red_r-10 w-5 text-white' />}
                </button>
                <Link
                  href={createSlug('/shop/product/', product?.parent.name, product?.parent.id)}
                  className='w-[30%] flex-shrink-0'
                >
                  <Image
                    src={product?.parent?.image}
                    alt={product?.name}
                    className='object-contain object-center border border-gray_r-6 h-40 w-full rounded-md'
                  />
                </Link>
                <div className='flex-1 px-2 text-caption-2'>
                  <Link
                    href={createSlug('/shop/product/', product?.parent.name, product?.parent.id)}
                    className='line-clamp-2 leading-6 !text-gray_r-12 font-normal'
                  >
                    {product?.parent?.name}
                  </Link>
                  <div className='text-gray_r-11 mt-1'>
                    {product?.code}{' '}
                    {product?.attributes.length > 0 ? `| ${product?.attributes.join(', ')}` : ''}
                  </div>
                  {product?.price?.discountPercentage > 0 && (
                    <div className='flex gap-x-1 items-center mt-3'>
                      <div className='text-gray_r-11 line-through text-caption-2'>
                        {currencyFormat(product?.price?.price)}
                      </div>
                      <div className='badge-solid-red'>{product?.price?.discountPercentage}%</div>
                    </div>
                  )}
                  <div className='font-normal mt-1'>
                    {currencyFormat(product?.price?.priceDiscount)}
                  </div>
                  <div className='flex justify-between items-center mt-1'>
                    <div className='text-red_r-11 font-medium'>
                      {currencyFormat(product?.price?.priceDiscount * product?.quantity)}
                    </div>
                    <div className='flex gap-x-1'>
                      <button
                        type='button'
                        className='btn-light px-2 py-1'
                        onClick={() => updateQuantity(1, product?.id, 'MINUS')}
                        disabled={product?.quantity == 1}
                      >
                        -
                      </button>
                      <input
                        className='form-input w-6 border-0 border-b rounded-none py-1 px-0 text-center'
                        type='number'
                        value={product?.quantity}
                        onChange={(e) => updateQuantity(e.target.value, product?.id)}
                        onBlur={(e) => updateQuantity(e.target.value, product?.id, 'BLUR')}
                      />
                      <button
                        type='button'
                        className='btn-light px-2 py-1'
                        onClick={() => updateQuantity(1, product?.id, 'PLUS')}
                      >
                        +
                      </button>
                      <button
                        className='btn-red p-1 ml-1'
                        onClick={() => setDeleteConfirmation(product)}
                      >
                        <TrashIcon className='w-4' />
                      </button>
                    </div>
                  </div>
                </div>
              </div>
            ))}

            <div className='sticky bottom-0 left-0 w-full p-4 mt-auto border-t border-gray_r-6 bg-white'>
              <div className='flex justify-between mb-4'>
                <div className='text-gray_r-11'>
                  Total:
                  <span className='text-red_r-11 font-semibold'>
                    &nbsp;
                    {selectedProduct().length > 0
                      ? currencyFormat(totalPriceBeforeTax - totalDiscountAmount + totalTaxAmount)
                      : '-'}
                  </span>
                </div>
              </div>
              <div className='flex gap-x-3'>
                <button
                  type='button'
                  className='btn-yellow flex-1'
                  disabled={selectedProduct().length == 0}
                  onClick={() => router.push('/shop/quotation')}
                >
                  Quotation
                </button>
                <button
                  type='button'
                  className='btn-solid-red flex-1'
                  disabled={selectedProduct().length == 0}
                  onClick={() => router.push('/shop/checkout')}
                >
                  Checkout
                </button>
              </div>
            </div>
          </div>

          <BottomPopup
            active={deleteConfirmation}
            close={() => setDeleteConfirmation(null)}
            title='Hapus dari Keranjang'
          >
            <div className='leading-7 text-gray_r-12/80'>
              Apakah anda yakin menghapus barang{' '}
              <span className='underline'>{deleteConfirmation?.name}</span> dari keranjang?
            </div>
            <div className='flex mt-6 gap-x-4'>
              <button
                className='btn-solid-red flex-1'
                type='button'
                onClick={() => deleteProduct(deleteConfirmation?.id)}
              >
                Ya, Hapus
              </button>
              <button
                className='btn-light flex-1'
                type='button'
                onClick={() => setDeleteConfirmation(null)}
              >
                Batal
              </button>
            </div>
          </BottomPopup>
        </div>
      </MobileView>

      <DesktopView>
        <div className='container mx-auto pt-10'>
          <div className='flex'>
            <div className='w-9/12'>
              <h1 className='text-title-sm font-semibold'>Daftar Produk Belanja</h1>
            </div>
          </div>
        </div>
      </DesktopView>
    </>
  )
}

export default Cart