import Link from "@/components/elements/Link"
import { useRouter } from "next/router"
import { useEffect, useState } from "react"
import Header from "@/components/layouts/Header"
import apiOdoo from "@/core/utils/apiOdoo"
import { createSlug, getIdFromSlug } from "@/core/utils/slug"
import currencyFormat from "@/core/utils/currencyFormat"
import Layout from "@/components/layouts/Layout"
import { createOrUpdateItemCart } from "@/core/utils/cart"
import toast from "react-hot-toast"
import Footer from "@/components/layouts/Footer"
import Image from "@/components/elements/Image"
import LineDivider from "@/components/elements/LineDivider"
import { HeartIcon as HeartIconSolid } from "@heroicons/react/24/solid"
import { useAuth } from "@/core/utils/auth"
import { HeartIcon } from "@heroicons/react/24/outline"
import LazyLoad from "react-lazy-load"
import ProductSimilar from "@/components/products/ProductSimilar"

export async function getServerSideProps( context ) {
  const { slug } = context.query
  let product = await apiOdoo('GET', '/api/v1/product/' + getIdFromSlug(slug))
  if (product?.length == 1) {
    product = product[0]
    product.description = product.description.replaceAll('<p>', '||p||')
    product.description = product.description.replaceAll('</p>', '||/p||')
    product.description = product.description.replace(/(<([^>]+)>)/gi, ' ')
    product.description = product.description.replaceAll('||p||', '<p>')
    product.description = product.description.replaceAll('||/p||', '</p>')
    product.description = product.description.trim()
  }
  return { props: { product } }
}

export default function ProductDetail({ product }) {
  const [ auth ] = useAuth()
  const router = useRouter()
  const { slug } = router.query
  const [selectedVariant, setSelectedVariant] = useState("")
  const [quantity, setQuantity] = useState("1")
  const [activeVariant, setActiveVariant] = useState({
    id: product.id,
    code: product.code,
    price: product.lowest_price,
    stock: product.stock_total,
    weight: product.weight,
    attributes: '',
  })

  const [ isAddedToWishlist, setAddedToWishlist ] = useState(false)
  const [ activeTab, setActiveTab ] = useState('specification')
  
  const addOrDeleteWishlist = async () => {
    if (auth) {
      await apiOdoo('POST', `/api/v1/user/${auth.id}/wishlist/create-or-delete`, {
        product_id: product.id
      })
      if (isAddedToWishlist) {
        toast.success('Berhasil menghapus dari wishlist')
      } else {
        toast.success('Berhasil menambahkan ke wishlist')
      }
      setAddedToWishlist(!isAddedToWishlist)
    } else {
      toast.error('Login terlebih dahulu untuk melanjutkan')
      router.push('/login')
    }
  }

  useEffect(() => {
    if (auth) {
      const checkWishlist = async () => {
        const wishlist = await apiOdoo('GET', `/api/v1/user/${auth.id}/wishlist?product_id=${product.id}`)
        setAddedToWishlist(wishlist.product_total > 0 ? true : false)
      }
      checkWishlist()
    }
  }, [ auth, product ])
  
  useEffect(() => {
    if (product.variants.length == 1) {
      setSelectedVariant(product.variants[0].id)
    }
  }, [ product ])

  useEffect(() => {
    if (selectedVariant != '') {
      let newActiveVariant = product.variants.filter((variant) => {
        return variant.id == selectedVariant
      })
  
      if (newActiveVariant.length == 1) {
        newActiveVariant = newActiveVariant[0]
        setActiveVariant({
          id: newActiveVariant.id,
          code: newActiveVariant.code,
          price: newActiveVariant.price,
          stock: newActiveVariant.stock,
          weight: newActiveVariant.weight,
          attributes: newActiveVariant.attributes.join(', '),
        })
      }
    }
  }, [selectedVariant, product])

  const onchangeVariant = (e) => {
    setSelectedVariant(e.target.value)
  }

  const onChangeQuantity = (e) => {
    let inputValue = e.target.value
    inputValue = parseInt(inputValue)
    inputValue = Math.floor(inputValue)
    setQuantity(inputValue)
  }

  const addItemToCart = () => {
    if (product.variant_total > 1 && !selectedVariant) {
      toast.error('Pilih varian terlebih dahulu untuk menambahkan ke keranjang', { duration: 2000 })
      return false
    }

    if (quantity > 0) {
      toast.success('Berhasil menambahkan ke keranjang', { duration: 1500 })
      createOrUpdateItemCart(activeVariant.id, parseInt(quantity))
    } else {
      toast.error('Jumlah barang yang ditambahkan minimal 1 pcs', { duration: 2000 })
    }

    return true
  }

  const checkoutProduct = () => {
    if (!auth) {
      toast.error('Login terlebih dahulu untuk melanjutkan', { duration: 2000 })
      router.push('/login')
      return
    }
    if (product.variant_total > 1 && !selectedVariant) {
      toast.error('Pilih varian terlebih dahulu untuk melanjutkan pembelian', { duration: 2000 })
      return
    }
    if (quantity < 0) {
      toast.error('Jumlah barang yang ditambahkan minimal 1 pcs', { duration: 2000 })
      return
    }
    router.push(`/shop/checkout?product_id=${activeVariant.id}&qty=${quantity}`)
  }

  const TabButton = ({ children, name }) => (
    <button 
      type="button" 
      className={`font-medium pb-1 ${activeTab == name ? 'text-red_r-11 border-b border-red_r-10' : 'text-gray_r-11'}`}
      onClick={() => setActiveTab(name)}
    >
      { children }
    </button>
  )

  return (
    <>
      <Header title={`${product.name} - Indoteknik`}/>
      <Layout>
        <Image 
          src={product.image}
          alt={product.name}
          className="border-b border-gray_r-6 w-full h-[300px] object-contain object-center bg-white"
        />

        <div className="p-4">
        <div className="flex justify-between gap-x-3">
          <div>
            <Link href={'/shop/brands/' + createSlug(product.manufacture.name, product.manufacture.id)}>
              {product.manufacture.name ?? '-'}
            </Link>
            <h1 className="h2 mt-2 mb-3">{product.name}{activeVariant.attributes ? ' - ' + activeVariant.attributes : ''}</h1>
          </div>
          <button className="h-fit" onClick={addOrDeleteWishlist}>
            { isAddedToWishlist && (
              <HeartIconSolid className="w-6 text-red_r-10" />
            ) }
            { !isAddedToWishlist && (
              <HeartIcon className="w-6" />
            ) }
          </button>
        </div>

          {product.variant_total > 1 && !selectedVariant && product.lowest_price.price > 0 ? (
            <p className="text-caption-2 text-gray-800 mb-1">Harga mulai dari:</p>
          ) : ''}

          {product.lowest_price.discount_percentage > 0 ? (
            <div className="flex gap-x-1 items-center mb-1">
              <p className="text-caption-2 text-gray_r-11 line-through">{currencyFormat(activeVariant.price.price)}</p>
              <span className="badge-solid-red">{activeVariant.price.discount_percentage}%</span>
            </div>
          ) : ''} 

          {product.lowest_price.price > 0 ? (
            <p className="text-body-lg font-semibold">{currencyFormat(activeVariant.price.price_discount)}</p>
          ) : (
            <p className="text-gray_r-11">Dapatkan harga terbaik, <a href="">hubungi kami.</a></p>
          )}
        </div>
        
        <LineDivider />

        <div className="p-4">
          <div className="">
            <label className="form-label mb-2">Pilih: <span className="text-gray_r-11 font-normal">{product.variant_total} Varian</span></label>
            <select name="variant" className="form-input" value={selectedVariant} onChange={onchangeVariant} >
              <option value="" disabled={selectedVariant != "" ? true : false}>Pilih Varian...</option>
              {product.variants.length > 1 ? (
                product.variants.map((variant) => {
                  return (
                    <option key={variant.id} value={variant.id}>{variant.attributes.join(', ')}</option>
                  )
                })
              ) : (
                <option key={product.variants[0].id} value={product.variants[0].id}>{product.variants[0].name}</option>
              )}
            </select>
          </div>

          <label htmlFor="quantity" className="form-label mb-1 mt-3">Jumlah</label>
          <div className="flex gap-x-2 mt-2">
              <input type="number" name="quantity" id="quantity" className="form-input h-full w-5/12 text-center" value={quantity} onChange={onChangeQuantity} />
            
            <button 
              className="btn-yellow w-full" 
              onClick={addItemToCart} 
              disabled={(product.lowest_price.price == 0 ? true : false)}
            >
              Keranjang
            </button>
            <button 
              onClick={checkoutProduct}
              className="btn-solid-red w-full"
            >
              Beli
            </button>
          </div>
        </div>

        <LineDivider />

        <div className="p-4">
          <h2 className="font-bold mb-4">Informasi Produk</h2>
          <div className="flex gap-x-3 mb-4">
            <TabButton name="specification">Spesifikasi</TabButton>
            <TabButton name="description">Deskripsi</TabButton>
            <TabButton name="information">Info Penting</TabButton>
          </div>
          
          <div className={`border border-gray_r-6 rounded divide-y ${activeTab == 'specification' ? 'block' : 'hidden'}`}>
            <ProductSpecification label="Jumlah Varian">
              <p className="text-gray-800">{product.variant_total} Varian</p>
            </ProductSpecification>
            <ProductSpecification label="Nomor SKU">
              <p className="text-gray-800" id="sku_number">SKU-{activeVariant.id}</p>
            </ProductSpecification>
            <ProductSpecification label="Part Number">
              <p className="text-gray-800" id="part_number">{activeVariant.code}</p>
            </ProductSpecification>
            <ProductSpecification label="Stok">
              <div className="flex gap-x-2" id="stock">
                {activeVariant.stock > 0 ? (activeVariant.stock > 5 && (
                  <>
                    <div className="badge-solid-red">Ready Stock</div>
                    <div className="badge-gray">{activeVariant.stock > 5 ? '> 5' : '< 5'}</div>
                  </>
                )) : '0'}
              </div>
            </ProductSpecification>
            <ProductSpecification label="Part Number">
              <p className="text-gray-800" id="weight">{activeVariant.weight > 0 ? activeVariant.weight : '1'} KG</p>
            </ProductSpecification>
          </div>
          
          <div 
            className={`text-gray-800 leading-7 ${activeTab == 'description' ? 'block' : 'hidden'}`} 
            dangerouslySetInnerHTML={{__html: (product.description != '' ? product.description : 'Belum ada deskripsi produk.')}}
          ></div>
        </div>

        <LineDivider />
        
        <LazyLoad>
          <ProductSimilar productId={getIdFromSlug(slug || '')} />
        </LazyLoad>
        
        <Footer />
      </Layout>
    </>
  )
}

const ProductSpecification = ({ children, ...props }) => {
  return (
    <div className="flex p-3 justify-between items-center gap-x-1">
      <h3 className="text-gray-900">{ props.label }</h3>
      { children }
    </div>
  )
}