"use client";

import React, { useState, useEffect, useCallback, useMemo, useRef } from 'react';
import {
  Box,
  Typography,
  Card,
  CardContent,
  Table,
  TableBody,
  TableCell,
  TableContainer,
  TableHead,
  TableRow,
  Paper,
  CircularProgress,
  TablePagination,
  Stack
} from '@mui/material';
import { useTranslation } from 'react-i18next';
import dayjs from 'dayjs';
import { arrayToDayjs } from '@/app/utils/formatUtil';
import { fetchMaterialPickStatus, MaterialPickStatusItem } from '@/app/api/jo/actions';
import { DatePicker, LocalizationProvider } from "@mui/x-date-pickers";
import { AdapterDayjs } from "@mui/x-date-pickers/AdapterDayjs";

const REFRESH_INTERVAL = 10 * 60 * 1000; // 10 minutes in milliseconds

const MaterialPickStatusTable: React.FC = () => {
  const { t } = useTranslation("jo");
  const [data, setData] = useState<MaterialPickStatusItem[]>([]);
  const [loading, setLoading] = useState<boolean>(true);
  const refreshCountRef = useRef<number>(0);
  const [selectedDate, setSelectedDate] = useState(dayjs().format("YYYY-MM-DD"));
  const [paginationController, setPaginationController] = useState({
    pageNum: 0,
    pageSize: 10,
  });
  const [now, setNow] = useState(dayjs());
  const [lastDataRefreshTime, setLastDataRefreshTime] = useState<dayjs.Dayjs | null>(null);
  
  const loadData = useCallback(async () => {
    setLoading(true);
    try {
      const result = await fetchMaterialPickStatus(selectedDate);
      if (refreshCountRef.current >= 1) {
        setData(result);
      } else {
        setData(result || []);
      }
      refreshCountRef.current += 1;
      setLastDataRefreshTime(dayjs());
    } catch (error) {
      console.error('Error fetching material pick status:', error);
      setData([]);
    } finally {
      setLoading(false);
    }
  }, [selectedDate]);

  useEffect(() => {
    loadData();
    const interval = setInterval(() => {
      loadData();
    }, REFRESH_INTERVAL);
    return () => clearInterval(interval);
  }, [loadData]);

  useEffect(() => {
    const timer = setInterval(() => setNow(dayjs()), 60 * 1000);
    return () => clearInterval(timer);
  }, []);

  const formatTime = (timeData: any): string => {
    if (!timeData) return '';
    
    // Handle LocalDateTime ISO string format (e.g., "2026-01-09T18:01:54")
    if (typeof timeData === 'string') {
      // Try parsing as ISO string first (most common format from LocalDateTime)
      const parsed = dayjs(timeData);
      if (parsed.isValid()) {
        return parsed.format('HH:mm');
      }
      
      // Try parsing as custom format YYYYMMDDHHmmss
      const customParsed = dayjs(timeData, 'YYYYMMDDHHmmss');
      if (customParsed.isValid()) {
        return customParsed.format('HH:mm');
      }
      
      // Try parsing as time string (HH:mm or HH:mm:ss)
      const parts = timeData.split(':');
      if (parts.length >= 2) {
        const hour = parseInt(parts[0], 10);
        const minute = parseInt(parts[1] || '0', 10);
        if (!isNaN(hour) && !isNaN(minute)) {
          return `${hour.toString().padStart(2, '0')}:${minute.toString().padStart(2, '0')}`;
        }
      }
    } else if (Array.isArray(timeData)) {
      // Handle array format [year, month, day, hour, minute, second]
      const hour = timeData[3] ?? timeData[0] ?? 0;
      const minute = timeData[4] ?? timeData[1] ?? 0;
      return `${hour.toString().padStart(2, '0')}:${minute.toString().padStart(2, '0')}`;
    }
    
    return '';
  };
  
  const calculatePickTime = (startTime: any, endTime: any): number => {
    if (!startTime || !endTime) return 0;
    
    let start: dayjs.Dayjs;
    let end: dayjs.Dayjs;
    
    // Parse start time
    if (Array.isArray(startTime)) {
      // Array format: [year, month, day, hour, minute, second]
      if (startTime.length >= 5) {
        const year = startTime[0] || 0;
        const month = (startTime[1] || 1) - 1; // month is 0-indexed in JS Date
        const day = startTime[2] || 1;
        const hour = startTime[3] || 0;
        const minute = startTime[4] || 0;
        const second = startTime[5] || 0;
        
        // Create Date object and convert to dayjs
        const date = new Date(year, month, day, hour, minute, second);
        start = dayjs(date);
        console.log('Parsed start time:', { 
          array: startTime, 
          date: date.toISOString(), 
          dayjs: start.format('YYYY-MM-DD HH:mm:ss'),
          isValid: start.isValid()
        });
      } else {
        // Fallback to arrayToDayjs for shorter arrays
        start = arrayToDayjs(startTime, true);
      }
    } else if (typeof startTime === 'string') {
      // Try ISO format first
      start = dayjs(startTime);
      if (!start.isValid()) {
        // Try custom format
        start = dayjs(startTime, 'YYYYMMDDHHmmss');
      }
    } else {
      start = dayjs(startTime);
    }
    
    // Parse end time
    if (Array.isArray(endTime)) {
      // Array format: [year, month, day, hour, minute, second]
      if (endTime.length >= 5) {
        const year = endTime[0] || 0;
        const month = (endTime[1] || 1) - 1; // month is 0-indexed in JS Date
        const day = endTime[2] || 1;
        const hour = endTime[3] || 0;
        const minute = endTime[4] || 0;
        const second = endTime[5] || 0;
        
        // Create Date object and convert to dayjs
        const date = new Date(year, month, day, hour, minute, second);
        end = dayjs(date);
        console.log('Parsed end time:', { 
          array: endTime, 
          date: date.toISOString(), 
          dayjs: end.format('YYYY-MM-DD HH:mm:ss'),
          isValid: end.isValid()
        });
      } else {
        // Fallback to arrayToDayjs for shorter arrays
        end = arrayToDayjs(endTime, true);
      }
    } else if (typeof endTime === 'string') {
      // Try ISO format first
      end = dayjs(endTime);
      if (!end.isValid()) {
        // Try custom format
        end = dayjs(endTime, 'YYYYMMDDHHmmss');
      }
    } else {
      end = dayjs(endTime);
    }
    
    if (!start.isValid() || !end.isValid()) {
      console.warn('Invalid time values:', { 
        startTime, 
        endTime, 
        startValid: start.isValid(), 
        endValid: end.isValid(),
        startFormat: start.isValid() ? start.format() : 'invalid',
        endFormat: end.isValid() ? end.format() : 'invalid'
      });
      return 0;
    }
    
    // Calculate difference in seconds first, then convert to minutes
    // This handles sub-minute differences correctly
    const diffSeconds = end.diff(start, 'second');
    const diffMinutes = Math.ceil(diffSeconds / 60); // Round up to nearest minute
    
    console.log('Time calculation:', {
      start: start.format('YYYY-MM-DD HH:mm:ss'),
      end: end.format('YYYY-MM-DD HH:mm:ss'),
      diffSeconds,
      diffMinutes
    });
    
    return diffMinutes > 0 ? diffMinutes : 0;
  };

  const handlePageChange = useCallback((event: unknown, newPage: number) => {
    setPaginationController(prev => ({
      ...prev,
      pageNum: newPage,
    }));
  }, []);

  const handlePageSizeChange = useCallback((event: React.ChangeEvent<HTMLInputElement>) => {
    const newPageSize = parseInt(event.target.value, 10);
    setPaginationController({
      pageNum: 0,
      pageSize: newPageSize,
    });
  }, []);

  const paginatedData = useMemo(() => {
    const startIndex = paginationController.pageNum * paginationController.pageSize;
    const endIndex = startIndex + paginationController.pageSize;
    return data.slice(startIndex, endIndex);
  }, [data, paginationController]);

  return (
    <Card sx={{ mb: 2 }}>
      <CardContent>
        {/* Title */}
        <Typography variant="h5" sx={{ fontWeight: 600, mb: 2 }}>
          {t("Material Pick Status")}
        </Typography>

        {/* Filters */}
        <Stack direction="row" spacing={2} sx={{ mb: 3 }}>
          <LocalizationProvider dateAdapter={AdapterDayjs}>
            <DatePicker
              label={t("Date")}
              value={dayjs(selectedDate)}
              onChange={(newValue) => {
                setSelectedDate(newValue ? newValue.format("YYYY-MM-DD") : selectedDate);
              }}
              format="YYYY-MM-DD"
              slotProps={{
                textField: { size: "small", sx: { minWidth: 160 } },
              }}
            />
          </LocalizationProvider>

          <Box sx={{ flexGrow: 1 }} />
          <Stack direction="row" spacing={2} sx={{ alignSelf: 'center' }}>
            <Typography variant="body2" sx={{ color: 'text.secondary' }}>
              {t("Now")}: {now.format('HH:mm')}
            </Typography>
            <Typography variant="body2" sx={{ color: 'text.secondary' }}>
              {t("Auto-refresh every 10 minutes")} | {t("Last updated")}: {lastDataRefreshTime ? lastDataRefreshTime.format('HH:mm:ss') : '--:--:--'}
            </Typography>
          </Stack>
        </Stack>

        <Box sx={{ mt: 2 }}>
          {loading ? (
            <Box sx={{ display: 'flex', justifyContent: 'center', p: 3 }}>
              <CircularProgress />
            </Box>
          ) : (
            <>
              <TableContainer component={Paper} sx={{ maxHeight: 440, overflow: 'auto' }}>
                <Table size="small" sx={{ minWidth: 650 }}>
                  <TableHead sx={{ position: 'sticky', top: 0, zIndex: 1, backgroundColor: 'grey.100' }}>
                    <TableRow>
                      <TableCell>
                        <Box sx={{ display: 'flex', flexDirection: 'column', gap: 0.5 }}>
                          <Typography variant="subtitle2" sx={{ fontWeight: 600 }}>
                            {t("Pick Order No.- Job Order No.- Item")}
                          </Typography>
                     
                        </Box>
                      </TableCell>
                      
                      <TableCell align="right">
                        <Box sx={{ display: 'flex', flexDirection: 'column', gap: 0.5 }}>
                          <Typography variant="subtitle2" sx={{ fontWeight: 600 }}>
                            {t("Job Order Qty")}
                          </Typography>
                          
                        </Box>
                      </TableCell>
                  
                      <TableCell align="right">
                        <Box sx={{ display: 'flex', flexDirection: 'column', gap: 0.5 }}>
                          <Typography variant="subtitle2" sx={{ fontWeight: 600 }}>
                            {t("No. of Items to be Picked")}
                          </Typography>
                          
                        </Box>
                      </TableCell>
                      <TableCell align="right">
                        <Box sx={{ display: 'flex', flexDirection: 'column', gap: 0.5 }}>
                          <Typography variant="subtitle2" sx={{ fontWeight: 600 }}>
                            {t("No. of Items with Issue During Pick")}
                          </Typography>
                        
                        </Box>
                      </TableCell>
                      <TableCell>
                        <Box sx={{ display: 'flex', flexDirection: 'column', gap: 0.5 }}>
                          <Typography variant="subtitle2" sx={{ fontWeight: 600 }}>
                            {t("Pick Start Time")}
                          </Typography>
                     
                        </Box>
                      </TableCell>
                      <TableCell>
                        <Box sx={{ display: 'flex', flexDirection: 'column', gap: 0.5 }}>
                          <Typography variant="subtitle2" sx={{ fontWeight: 600 }}>
                            {t("Pick End Time")}
                          </Typography>
                        
                        </Box>
                      </TableCell>
                      <TableCell align="right" sx={{ 
            
                      }}>
                        <Box sx={{ display: 'flex', flexDirection: 'column', gap: 0.5 }}>
                          <Typography variant="subtitle2" sx={{ fontWeight: 600 }}>
                            {t("Pick Time Taken (minutes)")}
                          </Typography>
                       
                        </Box>
                      </TableCell>
                    </TableRow>
                  </TableHead>
                  <TableBody>
                    {paginatedData.length === 0 ? (
                      <TableRow>
                        <TableCell colSpan={9} align="center">
                          {t("No data available")}
                        </TableCell>
                      </TableRow>
                    ) : (
                      paginatedData.map((row) => {
                        const pickTimeTaken = calculatePickTime(row.pickStartTime, row.pickEndTime);
                        
                        return (
                          <TableRow key={row.id}>
                            <TableCell>
                               <Box> {row.pickOrderCode || '-'}</Box>
                               <br />
                               <Box>{row.jobOrderCode || '-'}</Box>
                               <br />
                                <Box>{row.itemCode || '-'} {row.itemName || '-'}</Box>
                              
                                
                                </TableCell>
                           
                            <TableCell align="right">
                              {row.jobOrderQty !== null && row.jobOrderQty !== undefined
                                ? `${row.jobOrderQty} ${row.uom || ''}`
                                : '-'}
                            </TableCell>
                            <TableCell align="right">{row.numberOfItemsToPick ?? 0}</TableCell>
                            <TableCell align="right">{row.numberOfItemsWithIssue ?? 0}</TableCell>
                            <TableCell>{formatTime(row.pickStartTime) || '-'}</TableCell>
                            <TableCell>{formatTime(row.pickEndTime) || '-'}</TableCell>
                            <TableCell align="right" sx={{ 
                              backgroundColor: 'rgba(76, 175, 80, 0.1)',
                              fontWeight: 600
                            }}>
                              {pickTimeTaken > 0 ? `${pickTimeTaken} ${t("minutes")}` : '-'}
                            </TableCell>
                          </TableRow>
                        );
                      })
                    )}
                  </TableBody>
                </Table>
              </TableContainer>
              {data.length > 0 && (
                <TablePagination
                  component="div"
                  count={data.length}
                  page={paginationController.pageNum}
                  rowsPerPage={paginationController.pageSize}
                  onPageChange={handlePageChange}
                  onRowsPerPageChange={handlePageSizeChange}
                  rowsPerPageOptions={[5, 10, 15, 25]}
                  labelRowsPerPage={t("Rows per page")}
                />
              )}
            </>
          )}
        </Box>
      </CardContent>
    </Card>
  );
};

export default MaterialPickStatusTable;