import * as React from 'react';
import { useCallback, useEffect, useMemo, useState } from "react";
import { useTranslation } from 'react-i18next';
import Paper from '@mui/material/Paper';
import Table from '@mui/material/Table';
import TableBody from '@mui/material/TableBody';
import TableCell from '@mui/material/TableCell';
import TableContainer from '@mui/material/TableContainer';
import TableHead from '@mui/material/TableHead';
import TablePagination from '@mui/material/TablePagination';
import TableRow from '@mui/material/TableRow';
import { Accordion, AccordionSummary, AccordionDetails, Typography, Box, TextField, CircularProgress, Tooltip } from '@mui/material';
import ExpandMoreIcon from '@mui/icons-material/ExpandMore';
import SearchIcon from '@mui/icons-material/Search';
import { useLocation, useNavigate } from 'react-router-dom';
import { useGlobalInfoStore } from "../../context/globalInfo";
import { getStoredRuns } from "../../api/storage";
import { RunSettings } from "./RunSettings";
import { CollapsibleRow } from "./ColapsibleRow";
import { ArrowDownward, ArrowUpward, UnfoldMore } from '@mui/icons-material';

export const columns: readonly Column[] = [
  { id: 'runStatus', label: 'Status', minWidth: 80 },
  { id: 'name', label: 'Name', minWidth: 80 },
  { id: 'startedAt', label: 'Started At', minWidth: 80 },
  { id: 'finishedAt', label: 'Finished At', minWidth: 80 },
  { id: 'settings', label: 'Settings', minWidth: 80 },
  { id: 'delete', label: 'Delete', minWidth: 80 },
];

type SortDirection = 'asc' | 'desc' | 'none';

interface AccordionSortConfig {
  [robotMetaId: string]: {
    field: keyof Data | null;
    direction: SortDirection;
  };
}

interface Column {
  id: 'runStatus' | 'name' | 'startedAt' | 'finishedAt' | 'delete' | 'settings';
  label: string;
  minWidth?: number;
  align?: 'right';
  format?: (value: string) => string;
}

export interface Data {
  id: number;
  status: string;
  name: string;
  startedAt: string;
  finishedAt: string;
  runByUserId?: string;
  runByScheduleId?: string;
  runByAPI?: boolean;
  log: string;
  runId: string;
  robotId: string;
  robotMetaId: string;
  interpreterSettings: RunSettings;
  serializableOutput: any;
  binaryOutput: any;
}

interface RunsTableProps {
  currentInterpretationLog: string;
  abortRunHandler: () => void;
  runId: string;
  runningRecordingName: string;
}

interface PaginationState {
  [robotMetaId: string]: {
    page: number;
    rowsPerPage: number;
  };
}

export const RunsTable: React.FC<RunsTableProps> = ({
  currentInterpretationLog,
  abortRunHandler,
  runId,
  runningRecordingName
}) => {
  const { t } = useTranslation();
  const navigate = useNavigate();
  const location = useLocation();

  const getUrlParams = () => {
    const match = location.pathname.match(/\/runs\/([^\/]+)(?:\/run\/([^\/]+))?/);
    return {
      robotMetaId: match?.[1] || null,
      urlRunId: match?.[2] || null
    };
  };

  const { robotMetaId: urlRobotMetaId, urlRunId } = getUrlParams();

  const isAccordionExpanded = useCallback((currentRobotMetaId: string) => {
    return currentRobotMetaId === urlRobotMetaId;
  }, [urlRobotMetaId]);

  const [accordionPage, setAccordionPage] = useState(0);
  const [accordionsPerPage, setAccordionsPerPage] = useState(10);
  const [accordionSortConfigs, setAccordionSortConfigs] = useState<AccordionSortConfig>({});

  const handleSort = useCallback((columnId: keyof Data, robotMetaId: string) => {
    setAccordionSortConfigs(prevConfigs => {
      const currentConfig = prevConfigs[robotMetaId] || { field: null, direction: 'none' };
      const newDirection: SortDirection = 
        currentConfig.field !== columnId ? 'asc' :
        currentConfig.direction === 'none' ? 'asc' :
        currentConfig.direction === 'asc' ? 'desc' : 'none';

      return {
        ...prevConfigs,
        [robotMetaId]: {
          field: newDirection === 'none' ? null : columnId,
          direction: newDirection,
        }
      };
    });
  }, []);

  const translatedColumns = useMemo(() => 
    columns.map(column => ({
      ...column,
      label: t(`runstable.${column.id}`, column.label)
    })),
    [t]
  );

  const [rows, setRows] = useState<Data[]>([]);
  const [searchTerm, setSearchTerm] = useState('');

  const [paginationStates, setPaginationStates] = useState<PaginationState>({});

  const { notify, rerenderRuns, setRerenderRuns } = useGlobalInfoStore();

  const handleAccordionChange = useCallback((robotMetaId: string, isExpanded: boolean) => {
    navigate(isExpanded ? `/runs/${robotMetaId}` : '/runs');
  }, [navigate]);

  const handleAccordionPageChange = useCallback((event: unknown, newPage: number) => {
    setAccordionPage(newPage);
  }, []);
  
  const handleAccordionsPerPageChange = useCallback((event: React.ChangeEvent<HTMLInputElement>) => {
    setAccordionsPerPage(+event.target.value);
    setAccordionPage(0); 
  }, []);

  const handleChangePage = useCallback((robotMetaId: string, newPage: number) => {
    setPaginationStates(prev => ({
      ...prev,
      [robotMetaId]: {
        ...prev[robotMetaId],
        page: newPage
      }
    }));
  }, []);

  const handleChangeRowsPerPage = useCallback((robotMetaId: string, newRowsPerPage: number) => {
    setPaginationStates(prev => ({
      ...prev,
      [robotMetaId]: {
        page: 0, // Reset to first page when changing rows per page
        rowsPerPage: newRowsPerPage
      }
    }));
  }, []);

  const getPaginationState = useCallback((robotMetaId: string) => {
    const defaultState = { page: 0, rowsPerPage: 10 };
    
    if (!paginationStates[robotMetaId]) {
      setTimeout(() => {
        setPaginationStates(prev => ({
          ...prev,
          [robotMetaId]: defaultState
        }));
      }, 0);
      return defaultState;
    }
    return paginationStates[robotMetaId];
  }, [paginationStates]);

  const debouncedSearch = useCallback((fn: Function, delay: number) => {
    let timeoutId: NodeJS.Timeout;
    return (...args: any[]) => {
      clearTimeout(timeoutId);
      timeoutId = setTimeout(() => fn(...args), delay);
    };
  }, []);

  const handleSearchChange = useCallback((event: React.ChangeEvent<HTMLInputElement>) => {
    const debouncedSetSearch = debouncedSearch((value: string) => {
      setSearchTerm(value);
      setAccordionPage(0);
      setPaginationStates(prev => {
        const reset = Object.keys(prev).reduce((acc, robotId) => ({
          ...acc,
          [robotId]: { ...prev[robotId], page: 0 }
        }), {});
        return reset;
      });
    }, 300);
    debouncedSetSearch(event.target.value);
  }, [debouncedSearch]);

  const fetchRuns = useCallback(async () => {
    try {
      const runs = await getStoredRuns();
      if (runs) {
        const parsedRows: Data[] = runs.map((run: any, index: number) => ({
          id: index,
          ...run,
        }));
        setRows(parsedRows);
      } else {
        notify('error', t('runstable.notifications.no_runs'));
      }
    } catch (error) {
      notify('error', t('runstable.notifications.fetch_error'));
    }
  }, [notify, t]);

  useEffect(() => {
    let mounted = true;

    if (rows.length === 0 || rerenderRuns) {
      fetchRuns().then(() => {
        if (mounted) {
          setRerenderRuns(false);
        }
      });
    }

    return () => {
      mounted = false;
    };
  }, [rerenderRuns, rows.length, setRerenderRuns, fetchRuns]);

  const handleDelete = useCallback(() => {
    setRows([]);
    notify('success', t('runstable.notifications.delete_success'));
    fetchRuns();
  }, [notify, t, fetchRuns]);

  // Filter rows based on search term
  const filteredRows = useMemo(() => {
    let result = rows.filter((row) =>
      row.name.toLowerCase().includes(searchTerm.toLowerCase())
    );
    return result;
  }, [rows, searchTerm]);

  const parseDateString = (dateStr: string): Date => {
    try {
      if (dateStr.includes('PM') || dateStr.includes('AM')) {
        return new Date(dateStr);
      }
      
      return new Date(dateStr.replace(/(\d+)\/(\d+)\//, '$2/$1/'))
    } catch {
      return new Date(0);
    }
  };

  const groupedRows = useMemo(() => {
    const groupedData = filteredRows.reduce((acc, row) => {
      if (!acc[row.robotMetaId]) {
        acc[row.robotMetaId] = [];
      }
      acc[row.robotMetaId].push(row);
      return acc;
    }, {} as Record<string, Data[]>);
  
    Object.keys(groupedData).forEach(robotId => {
      groupedData[robotId].sort((a, b) => 
        parseDateString(b.startedAt).getTime() - parseDateString(a.startedAt).getTime()
      );
    });
  
    const robotEntries = Object.entries(groupedData).map(([robotId, runs]) => ({
      robotId,
      runs,
      latestRunDate: parseDateString(runs[0].startedAt).getTime()
    }));
  
    robotEntries.sort((a, b) => b.latestRunDate - a.latestRunDate);
  
    return robotEntries.reduce((acc, { robotId, runs }) => {
      acc[robotId] = runs;
      return acc;
    }, {} as Record<string, Data[]>);
  }, [filteredRows]);

  const renderTableRows = useCallback((data: Data[], robotMetaId: string) => {
    const { page, rowsPerPage } = getPaginationState(robotMetaId);
    const start = page * rowsPerPage;
    const end = start + rowsPerPage;

    let sortedData = [...data];
    const sortConfig = accordionSortConfigs[robotMetaId];
    
    if (sortConfig?.field === 'startedAt' || sortConfig?.field === 'finishedAt') {
      if (sortConfig.direction !== 'none') {
        sortedData.sort((a, b) => {
          const dateA = parseDateString(a[sortConfig.field!]);
          const dateB = parseDateString(b[sortConfig.field!]);
          
          return sortConfig.direction === 'asc' 
            ? dateA.getTime() - dateB.getTime() 
            : dateB.getTime() - dateA.getTime();
        });
      }
    }
    
    return sortedData
      .slice(start, end)
      .map((row) => (
        <CollapsibleRow
          key={`row-${row.id}`}
          row={row}
          handleDelete={handleDelete}
          isOpen={urlRunId === row.runId || (runId === row.runId && runningRecordingName === row.name)}
          currentLog={currentInterpretationLog}
          abortRunHandler={abortRunHandler}
          runningRecordingName={runningRecordingName}
          urlRunId={urlRunId}
        />
      ));
  }, [paginationStates, runId, runningRecordingName, currentInterpretationLog, abortRunHandler, handleDelete, accordionSortConfigs]);

  const renderSortIcon = useCallback((column: Column, robotMetaId: string) => {
    const sortConfig = accordionSortConfigs[robotMetaId];
    if (column.id !== 'startedAt' && column.id !== 'finishedAt') return null;

    if (sortConfig?.field !== column.id) {
      return (
        <UnfoldMore 
          fontSize="small" 
          sx={{ 
            opacity: 0.3,
            transition: 'opacity 0.2s',
            '.MuiTableCell-root:hover &': {
              opacity: 1
            }
          }} 
        />
      );
    }

    return sortConfig.direction === 'asc' 
      ? <ArrowUpward fontSize="small" />
      : sortConfig.direction === 'desc'
        ? <ArrowDownward fontSize="small" />
        : <UnfoldMore fontSize="small" />;
  }, [accordionSortConfigs]);

  return (
    <React.Fragment>
      <Box display="flex" justifyContent="space-between" alignItems="center" mb={2}>
        <Typography variant="h6" component="h2">
          {t('runstable.runs', 'Runs')}
        </Typography>
        <TextField
          size="small"
          placeholder={t('runstable.search', 'Search runs...')}
          onChange={handleSearchChange}
          InputProps={{
            startAdornment: <SearchIcon sx={{ color: 'action.active', mr: 1 }} />
          }}
          sx={{ width: '250px' }}
        />
      </Box>

      <TableContainer component={Paper} sx={{ width: '100%', overflow: 'hidden' }}>
        {Object.entries(groupedRows)
          .slice(
            accordionPage * accordionsPerPage,
            accordionPage * accordionsPerPage + accordionsPerPage
          )
          .map(([robotMetaId, data]) => (
            <Accordion 
              key={robotMetaId} 
              onChange={(event, isExpanded) => handleAccordionChange(robotMetaId, isExpanded)}
              TransitionProps={{ unmountOnExit: true }} // Optimize accordion rendering
            >
              <AccordionSummary expandIcon={<ExpandMoreIcon />}>
                <Typography variant="h6">{data[data.length - 1].name}</Typography>
              </AccordionSummary>
              <AccordionDetails>
                <Table stickyHeader aria-label="sticky table">
                  <TableHead>
                    <TableRow>
                      <TableCell />
                      {translatedColumns.map((column) => (
                        <TableCell
                          key={column.id}
                          align={column.align}
                          style={{ 
                            minWidth: column.minWidth,
                            cursor: column.id === 'startedAt' || column.id === 'finishedAt' ? 'pointer' : 'default'
                          }}
                          onClick={() => {
                            if (column.id === 'startedAt' || column.id === 'finishedAt') {
                              handleSort(column.id, robotMetaId);
                            }
                          }}
                        >
                          <Tooltip 
                            title={
                              (column.id === 'startedAt' || column.id === 'finishedAt')
                                ? t('runstable.sort_tooltip')
                                : ''
                            }
                          >
                            <Box sx={{ 
                              display: 'flex', 
                              alignItems: 'center', 
                              gap: 1,
                              '&:hover': {
                                '& .sort-icon': {
                                  opacity: 1
                                }
                              }
                            }}>
                              {column.label}
                              <Box className="sort-icon" sx={{ 
                                display: 'flex',
                                alignItems: 'center',
                                opacity: accordionSortConfigs[robotMetaId]?.field === column.id ? 1 : 0.3,
                                transition: 'opacity 0.2s'
                              }}>
                                {renderSortIcon(column, robotMetaId)}
                              </Box>
                            </Box>
                          </Tooltip>
                        </TableCell>
                      ))}
                    </TableRow>
                  </TableHead>
                  <TableBody>
                    {renderTableRows(data, robotMetaId)}
                  </TableBody>
                </Table>

                <TablePagination
                  component="div"
                  count={data.length}
                  rowsPerPage={getPaginationState(robotMetaId).rowsPerPage}
                  page={getPaginationState(robotMetaId).page}
                  onPageChange={(_, newPage) => handleChangePage(robotMetaId, newPage)}
                  onRowsPerPageChange={(event) => 
                    handleChangeRowsPerPage(robotMetaId, +event.target.value)
                  }
                  rowsPerPageOptions={[10, 25, 50, 100]}
                />
              </AccordionDetails>
            </Accordion>
          ))}
      </TableContainer>

      <TablePagination
        component="div"
        count={Object.keys(groupedRows).length}
        page={accordionPage}
        rowsPerPage={accordionsPerPage}
        onPageChange={handleAccordionPageChange}
        onRowsPerPageChange={handleAccordionsPerPageChange}
        rowsPerPageOptions={[10, 25, 50, 100]}
      />
    </React.Fragment>
  );
};