import Badge from "@/core/components/elements/Badge/Badge"
import Divider from "@/core/components/elements/Divider/Divider"
import Image from "@/core/components/elements/Image/Image"
import Link from "@/core/components/elements/Link/Link"
import currencyFormat from "@/core/utils/currencyFormat"
import { useEffect, useState } from "react"
import Select from "react-select"
import ProductSimilar from "./ProductSimilar"
import LazyLoad from "react-lazy-load"
import { toast } from "react-hot-toast"
import { updateItemCart } from "@/core/utils/cart"

const informationTabOptions = [
  { value: 'specification', label: 'Spesifikasi' },
  { value: 'description', label: 'Deskripsi' },
  { value: 'important', label: 'Info Penting' },
]

const Product = ({ product }) => {
  const [ quantity, setQuantity ] = useState('1')
  const [ selectedVariant, setSelectedVariant ] = useState(null)
  const [ informationTab, setInformationTab ] = useState(null)

  const [ activeVariant, setActiveVariant ] = useState({
    id: product.id,
    code: product.code,
    name: product.name,
    price: product.lowestPrice,
    stock: product.stockTotal,
    weight: product.weight,
  })
  
  const variantOptions = product.variants?.map((variant) => ({
    value: variant.id,
    label: 
      (variant.code ? `[${variant.code}] ` : '')
      +
      (variant.attributes.length > 0 ? variant.attributes.join(', ') : product.name) 
  }))

  useEffect(() => {
    if (!selectedVariant && variantOptions.length == 1) {
      setSelectedVariant(variantOptions[0])
    }
  }, [selectedVariant, variantOptions])

  useEffect(() => {
    if (selectedVariant) {
      const variant = product.variants.find(variant => variant.id == selectedVariant.value)
      const variantAttributes = variant.attributes.length > 0 ? ' - ' + variant.attributes.join(', ') : ''
      
      setActiveVariant({
        id: variant.id,
        code: variant.code,
        name: variant.parent.name + variantAttributes,
        price: variant.price,
        stock: variant.stock,
        weight: variant.weight
      })
    }
  }, [selectedVariant, product])

  useEffect(() => {
    if (!informationTab) {
      setInformationTab(informationTabOptions[0].value)
    }
  }, [informationTab])

  const handleClickCart = () => {
    if (!selectedVariant) {
      toast.error('Pilih varian terlebih dahulu')
      return
    }
    if (!quantity || quantity < 1 || isNaN(parseInt(quantity))) {
      toast.error('Jumlah barang minimal 1')
      return
    }
    updateItemCart({
      productId: activeVariant.id,
      quantity
    })
    toast.success('Berhasil menambahkan ke keranjang')
  }

  return (
    <>
      <Image
        src={product.image}
        alt={product.name}
        className="h-72 object-contain object-center w-full border-b border-gray_r-4"
      />

      <div className="p-4">
        <Link href="/" className="mb-2">{ product.manufacture?.name }</Link>
        <h1 className="leading-6 font-medium">
          {activeVariant?.name}
        </h1>
        { activeVariant?.price?.discountPercentage > 0 && (
          <div className="flex gap-x-1 items-center mt-2">
            <div className="text-gray_r-11 line-through text-caption-1">
              {currencyFormat(activeVariant?.price?.price)}
            </div>
            <Badge type="solid-red">
              {activeVariant?.price?.discountPercentage}%
            </Badge>
          </div>
        ) }
        <h3 className="text-red_r-11 font-semibold mt-1">
          { activeVariant?.price?.priceDiscount > 0 ? currencyFormat(activeVariant?.price?.priceDiscount) : (
            <span className="text-gray_r-11 leading-6 font-normal">
              Hubungi kami untuk dapatkan harga terbaik,&nbsp;
              <a href="https://wa.me/" className="text-red_r-11 underline">klik disini</a>
            </span>
          ) }
        </h3>
      </div>

      <Divider />

      <div className="p-4">
        <div>
          <label className="flex justify-between">
            Pilih Varian:
            <span className="text-gray_r-11">
              { product?.variantTotal } Varian
            </span>
          </label>
          <Select
            name="variant"
            classNamePrefix="form-select"
            options={variantOptions}
            className="mt-2"
            value={selectedVariant}
            onChange={(option) => setSelectedVariant(option)}
            isSearchable={product.variantTotal > 10}
          />
        </div>
        <div className="mt-4 mb-2">Jumlah</div>
        <div className="flex gap-x-3">
          <div className="w-2/12">
            <input 
              name="quantity"
              type="number" 
              className="form-input" 
              value={quantity}
              onChange={(e) => setQuantity(e.target.value)}
            />
          </div>
          <button 
            type="button"
            className="btn-yellow flex-1"
            onClick={handleClickCart}
          >
            Keranjang
          </button>
          <button 
            type="button"
            className="btn-solid-red flex-1"
          >
            Beli
          </button>
        </div>
      </div>

      <Divider />

      <div className="p-4">
        <h2 className="font-semibold">Informasi Produk</h2>
        <div className="flex gap-x-4 mt-4 mb-3">
          { informationTabOptions.map((option) => (
            <TabButton 
              value={option.value} 
              key={option.value}
              active={informationTab == option.value}
              onClick={() => setInformationTab(option.value)}
            >
              {option.label}
            </TabButton>
          )) }
        </div>

        <TabContent 
          active={informationTab == 'specification'} 
          className="rounded border border-gray_r-6 divide-y divide-gray_r-6"
        >
          <SpecificationContent label="Jumlah Varian">
            <span>{product?.variantTotal} Varian</span>
          </SpecificationContent>
          <SpecificationContent label="Nomor SKU">
            <span>SKU-{product?.id}</span>
          </SpecificationContent>
          <SpecificationContent label="Part Number">
            <span>{activeVariant?.code || '-'}</span>
          </SpecificationContent>   
          <SpecificationContent label="Stok">
            { activeVariant?.stock > 0 && (
              <span className="flex gap-x-1.5">
                <div className="badge-solid-red">Ready Stock</div>
                <div className="badge-gray">
                  { activeVariant?.stock > 5 ? '> 5' : '< 5' }
                </div>
              </span>
            ) }
            { activeVariant?.stock == 0 && (
              <a 
                href="https://wa.me" 
                className="text-red_r-11 font-medium"
              >
                Tanya Stok
              </a>
            ) }
          </SpecificationContent>   
          <SpecificationContent label="Berat Barang">
            { activeVariant?.weight > 0 && (
              <span>{ activeVariant?.weight } KG</span>
            ) }
            { activeVariant?.weight == 0 && (
              <a 
                href="https://wa.me" 
                className="text-red_r-11 font-medium"
              >
                Tanya Berat
              </a>
            ) }
          </SpecificationContent>   
        </TabContent>

        <TabContent
          active={informationTab == 'description'}
          className="leading-6 text-gray_r-11"
          dangerouslySetInnerHTML={{__html: (product.description != '' ? product.description : 'Belum ada deskripsi produk.')}}
        />
      </div>

      <Divider />

      <div className="p-4">
        <h2 className="font-semibold mb-4">Kamu Mungkin Juga Suka</h2>
        <LazyLoad>
          <ProductSimilar query={product?.name.split(' ').slice(1, 3).join(' ')} />
        </LazyLoad>
      </div>
    </>
  )
}

const TabButton = ({ children, active, ...props }) => {
  const activeClassName = active ? 'text-red_r-11 underline underline-offset-4' : 'text-gray_r-11'
  return (
    <button 
      {...props}
      type="button" 
      className={`font-medium pb-1 ${activeClassName}`}
    >
      { children }
    </button>
  )
}

const TabContent = ({ children, active, className, ...props }) => (
  <div 
    {...props}
    className={`${active ? 'block' : 'hidden'} ${className}`}
  >
    { children }
  </div>
)

const SpecificationContent = ({ children, label }) => (
  <div className="flex justify-between p-3">
    <span className="text-gray_r-11">{ label }</span>
    { children }
  </div>
)

export default Product