import React, { useEffect, useState } from 'react'
import {
  Table,
  TableBody,
  TableCell,
  TableContainer,
  TableHead,
  TableRow,
  Paper,
  TextField,
  Button,
  Typography,
  TablePagination,
  Box,
} from '@mui/material'
import axios from 'axios'
import { isAutheticated } from '../../../auth'
import Axios from '../../../axios'
import Swal from 'sweetalert2'

function StockTable() {
  const [stocks, setStocks] = useState([]) // Store stock data
  const [loading, setLoading] = useState(true) // Loading state
  const [rowsPerPage, setRowsPerPage] = useState(5)
  const [page, setPage] = useState(0)
  const token = isAutheticated()

  // Fetch stock data from the backend
  const fetchStocks = async () => {
    try {
      const response = await Axios.get('/api/pd/stock', {
        headers: {
          Authorization: `Bearer ${token}`,
          'Content-Type': 'application/json',
        },
      })
      setStocks(response.data.stocks || [])
    } catch (error) {
      console.error('Error fetching stocks:', error)
    } finally {
      setLoading(false)
    }
  }

  // Handle stock value change and persist across pagination
  const handleStockChange = (productId, value) => {
    setStocks((prevStocks) =>
      prevStocks.map((stock) =>
        stock.productid === productId ? { ...stock, Stock: parseInt(value, 10) || 0 } : stock,
      ),
    )
  }
  console.log(stocks, 'stocks')

  // Submit updated stock values
  const handleSubmit = async () => {
    try {
      await Axios.put(
        '/api/pd/stock-update',
        { products: stocks },
        {
          headers: {
            Authorization: `Bearer ${token}`,
            'Content-Type': 'application/json',
          },
        },
      )
      Swal.fire('success!', 'Stock updated successfully', 'success')
    } catch (error) {
      console.error('Error updating stock:', error)
      Swal.fire('error!', 'Something went wrong', 'error')
    }
  }

  // Pagination handlers
  const handleChangePage = (event, newPage) => setPage(newPage)
  const handleChangeRowsPerPage = (event) => {
    setRowsPerPage(parseInt(event.target.value, 10))
    setPage(0)
  }

  // Fetch stocks on component mount
  useEffect(() => {
    fetchStocks()
  }, [])

  return (
    <Box p={3}>
      <Typography variant="h5" mb={2}>
        Product Stock Management
      </Typography>
      <TableContainer component={Paper}>
        <Table>
          <TableHead>
            <TableRow>
              <TableCell>Product Name</TableCell>
              <TableCell>SKU</TableCell>
              <TableCell>Current Stock</TableCell>
            </TableRow>
          </TableHead>
          <TableBody>
            {loading ? (
              <TableRow>
                <TableCell colSpan={3} align="center">
                  <Typography>Loading...</Typography>
                </TableCell>
              </TableRow>
            ) : (
              stocks.slice(page * rowsPerPage, page * rowsPerPage + rowsPerPage).map((stock) => (
                <TableRow key={stock.productid}>
                  <TableCell>{stock.name}</TableCell>
                  <TableCell>{stock.SKU}</TableCell>
                  <TableCell>
                    <TextField
                      type="number"
                      value={stock.Stock}
                      onChange={(e) => handleStockChange(stock.productid, e.target.value)}
                      variant="outlined"
                      size="small"
                    />
                  </TableCell>
                </TableRow>
              ))
            )}
          </TableBody>
        </Table>
        <TablePagination
          component="div"
          count={stocks.length}
          page={page}
          onPageChange={handleChangePage}
          rowsPerPage={rowsPerPage}
          onRowsPerPageChange={handleChangeRowsPerPage}
        />
      </TableContainer>
      <Box mt={2} display="flex" justifyContent="flex-end">
        <Button variant="contained" color="primary" onClick={handleSubmit}>
          Update Stock
        </Button>
      </Box>
    </Box>
  )
}

export default StockTable