text: import axios from "axios"
  import React, { useState, useEffect } from "react"
  import { Link } from "react-router-dom"
  import { Button, Form } from "react-bootstrap"
  import { useDispatch, useSelector } from "react-redux"
  import Message from "../components/Message"
  import Loader from "../components/Loader"
  import FormContainer from "../components/FormContainer"
  import { productDetailes, updateProduct } from "../actions/productActions"
  
  const ProductEditScreen = ({ match, history }) => {
    const productId = match.params.id
  
    const [name, setName] = useState("")
    const [price, setPrice] = useState(0)
    const [image, setImage] = useState("")
    const [brand, setBrand] = useState("")
    const [category, setCategory] = useState("")
    const [countInStock, setCountInStock] = useState(0)
    const [description, setDescription] = useState("")
    const [uploading, setUploading] = useState(false)
    const [uploadingError, setuploadingError] = useState("")
  
    const dispatch = useDispatch()
  
    const productDetails = useSelector((state) => state.productDetails)
    const { loading, error, product } = productDetails
  
    const productUpdate = useSelector((state) => state.productUpdate)
    const {
      loading: loadingUpdate,
      error: errorUpdate,
      success: successUpdate,
    } = productUpdate
  
    const userLogin = useSelector((state) => state.userLogin)
    const { userInfo } = userLogin
  
    useEffect(() => {
      if (successUpdate) {
        history.push(`/admin/productlist`)
      } else {
        if (!product.name || product._id !== productId) {
          dispatch(productDetailes(productId))
        } else {
          setName(product.name)
          setPrice(product.price)
          setImage(product.image)
          setBrand(product.brand)
          setCategory(product.category)
          setCountInStock(product.countInStock)
          setDescription(product.description)
        }
      }
    }, [product, dispatch, productId, history, successUpdate])
  
    const fileTypeError = (file) => {
      if (file) {
        const fileExt = file.name.split(".")[1].toLowerCase()
        const filetypes = /jpg|jpeg|png/
  
        if (!filetypes.test(fileExt)) {
          setuploadingError(
            "The file you were trying to upload is not an image"
          )
          return false
        } else {
          setuploadingError("")
          return true
        }
      }
    }
  
    const uploadFileHandler = async (e) => {
      const file = e.target.files[0]
  
      if (fileTypeError(file)) {
        const formData = new FormData()
        formData.append("image", file)
        setUploading(true)
  
        try {
          const config = {
            headers: {
              "Content-Type": "multipart/form-data",
              Authorization: `Bearer ${userInfo.token}`,
            },
          }
  
          const { data } = await axios.post("/api/upload", formData, config)
  
          setImage(data)
          setUploading(false)
        } catch (error) {
          console.error(error.message)
          setUploading(false)
        }
      }
    }
  
    const submitHandler = (e) => {
      e.preventDefault()
      dispatch(
        updateProduct({
          _id: productId,
          name,
          price,
          image,
          brand,
          category,
          countInStock,
          description,
        })
      )
    }
  
    return (
      <>
        <Link to='/admin/productlist' className='btn btn-light my-3'>
          Go Back
        </Link>
        <FormContainer>
          <h1>Edit Product</h1>
          {loadingUpdate && <Loader />}
          {errorUpdate && <Message variant='danger'>{errorUpdate}</Message>}
          {loading ? (
            <Loader />
          ) : error ? (
            <Message variant='danger'>{error}</Message>
          ) : (
            <Form onSubmit={submitHandler}>
              <Form.Group controlId='name'>
                <Form.Label>Name</Form.Label>
                <Form.Control
                  type='name'
                  placeholder='Enter name'
                  value={name}
                  onChange={(e) => setName(e.target.value)}
                ></Form.Control>
              </Form.Group>
  
              <Form.Group controlId='price'>
                <Form.Label>Price</Form.Label>
                <Form.Control
                  type='number'
                  placeholder='Enter price'
                  value={price}
                  onChange={(e) => setPrice(e.target.value)}
                ></Form.Control>
              </Form.Group>
  
              <Form.Group controlId='image'>
                <Form.Label>Image</Form.Label>
                <Form.Control
                  type='text'
                  placeholder='Enter image url'
                  value={image}
                  onChange={(e) => setImage(e.target.value)}
                ></Form.Control>
                <Form.File
                  id='image-file'
                  label='Choose File'
                  custom
                  onChange={uploadFileHandler}
                ></Form.File>
                {uploading && <Loader />}
                {uploadingError && (
                  <Message variant='danger'>{uploadingError}</Message>
                )}
              </Form.Group>
  
              <Form.Group controlId='brand'>
                <Form.Label>Brand</Form.Label>
                <Form.Control
                  type='text'
                  placeholder='Enter brand'
                  value={brand}
                  onChange={(e) => setBrand(e.target.value)}
                ></Form.Control>
              </Form.Group>
  
              <Form.Group controlId='countInStock'>
                <Form.Label>Count In Stock</Form.Label>
                <Form.Control
                  type='number'
                  placeholder='Enter count In Stock'
                  value={countInStock}
                  onChange={(e) => setCountInStock(e.target.value)}
                ></Form.Control>
              </Form.Group>
  
              <Form.Group controlId='category'>
                <Form.Label>Category</Form.Label>
                <Form.Control
                  type='text'
                  placeholder='Enter category'
                  value={category}
                  onChange={(e) => setCategory(e.target.value)}
                ></Form.Control>
              </Form.Group>
  
              <Form.Group controlId='description'>
                <Form.Label>Description</Form.Label>
                <Form.Control
                  type='text'
                  placeholder='Enter description'
                  value={description}
                  onChange={(e) => setDescription(e.target.value)}
                ></Form.Control>
              </Form.Group>
  
              <Button type='submit' variant='primary'>
                Update
              </Button>
            </Form>
          )}
        </FormContainer>
      </>
    )
  }
  
  export default ProductEditScreen
  