import React, { useState, useMemo, useEffect, useCallback, useRef } from 'react';
import { useNavigate, useSearchParams } from 'react-router-dom';
import { useTranslation } from 'react-i18next';
import { useMaintenanceTeamList } from '../hooks/useMaintenanceTeam';
import * as XLSX from 'xlsx';
import { 
  FaPlus, 
  FaFilter, 
  FaSync, 
  FaEye, 
  FaChevronLeft, 
  FaChevronRight,
  FaTimes,
  FaSave,
  FaStar,
  FaTrash,
  FaEdit,
  FaCheckSquare,
  FaSquare,
  FaFileExport,
  FaFileExcel,
  FaFileCsv,
  FaDownload,
  FaUsers,
  FaUserTie,
  FaBuilding,
  FaCopy
} from 'react-icons/fa';
import LinkField from '../components/LinkField';
import ListPagination from '../components/ListPagination';
import { buildDateRangeFilters, toFrappeFilterArray } from '../utils/listFilterUtils';

// Export types
type ExportFormat = 'csv' | 'excel';
type ExportScope = 'selected' | 'all_on_page' | 'all_with_filters';

interface ExportModalProps {
  isOpen: boolean;
  onClose: () => void;
  selectedCount: number;
  totalCount: number;
  pageCount: number;
  onExport: (scope: ExportScope, format: ExportFormat, columns: string[]) => void;
  isExporting: boolean;
  exportColumns: Array<{key: string, label: string, default: boolean}>;
}

const ExportModal: React.FC<ExportModalProps> = ({
  isOpen, onClose, selectedCount, totalCount, pageCount, onExport, isExporting, exportColumns
}) => {
  const { t } = useTranslation();
  const [scope, setScope] = useState<ExportScope>(selectedCount > 0 ? 'selected' : 'all_with_filters');
  const [format, setFormat] = useState<ExportFormat>('csv');
  const [selectedColumns, setSelectedColumns] = useState<string[]>(exportColumns.filter(c => c.default).map(c => c.key));

  useEffect(() => { setScope(selectedCount > 0 ? 'selected' : 'all_with_filters'); }, [selectedCount]);

  const toggleColumn = (key: string) => setSelectedColumns(prev => prev.includes(key) ? prev.filter(k => k !== key) : [...prev, key]);
  const selectAllColumns = () => setSelectedColumns(exportColumns.map(c => c.key));
  const selectDefaultColumns = () => setSelectedColumns(exportColumns.filter(c => c.default).map(c => c.key));

  if (!isOpen) return null;

  return (
    <div className="fixed inset-0 bg-black/50 flex items-center justify-center z-[70] p-4">
      <div className="bg-white dark:bg-gray-800 rounded-lg shadow-xl max-w-2xl w-full max-h-[90vh] overflow-hidden animate-scale-in">
        <div className="bg-gradient-to-r from-green-500 to-green-600 px-6 py-4">
          <div className="flex items-center justify-between">
            <div className="flex items-center gap-3">
              <FaFileExport className="text-white text-xl" />
              <h3 className="text-lg font-semibold text-white">{t('maintenance.export.title')}</h3>
            </div>
            <button onClick={onClose} className="text-white/80 hover:text-white transition-colors" disabled={isExporting}>
              <FaTimes size={20} />
            </button>
          </div>
        </div>

        <div className="p-6 overflow-y-auto max-h-[calc(90vh-180px)]">
          <div className="mb-6">
            <h4 className="text-sm font-semibold text-gray-700 dark:text-gray-300 mb-3">{t('maintenance.export.selectData')}</h4>
            <div className="space-y-2">
              <label className={`flex items-center gap-3 p-3 rounded-lg border cursor-pointer transition-all ${scope === 'selected' ? 'border-green-500 bg-green-50 dark:bg-green-900/20' : 'border-gray-200 dark:border-gray-700 hover:bg-gray-50 dark:hover:bg-gray-700/50'} ${selectedCount === 0 ? 'opacity-50 cursor-not-allowed' : ''}`}>
                <input type="radio" name="scope" value="selected" checked={scope === 'selected'} onChange={() => setScope('selected')} disabled={selectedCount === 0} className="text-green-600 focus:ring-green-500" />
                <div className="flex-1">
                  <div className="font-medium text-gray-900 dark:text-white">{t('maintenance.export.selectedRows')}</div>
                  <div className="text-sm text-gray-500 dark:text-gray-400">{t('maintenance.export.selectedCount', { count: selectedCount })}</div>
                </div>
                {selectedCount > 0 && <span className="bg-green-100 dark:bg-green-900/40 text-green-700 dark:text-green-300 px-2 py-1 rounded text-xs font-medium">{selectedCount} selected</span>}
              </label>

              <label className={`flex items-center gap-3 p-3 rounded-lg border cursor-pointer transition-all ${scope === 'all_on_page' ? 'border-green-500 bg-green-50 dark:bg-green-900/20' : 'border-gray-200 dark:border-gray-700 hover:bg-gray-50 dark:hover:bg-gray-700/50'}`}>
                <input type="radio" name="scope" value="all_on_page" checked={scope === 'all_on_page'} onChange={() => setScope('all_on_page')} className="text-green-600 focus:ring-green-500" />
                <div className="flex-1">
                  <div className="font-medium text-gray-900 dark:text-white">{t('maintenance.export.currentPage')}</div>
                  <div className="text-sm text-gray-500 dark:text-gray-400">{t('maintenance.export.currentPageCount', { count: pageCount })}</div>
                </div>
                <span className="bg-blue-100 dark:bg-blue-900/40 text-blue-700 dark:text-blue-300 px-2 py-1 rounded text-xs font-medium">{pageCount} rows</span>
              </label>

              <label className={`flex items-center gap-3 p-3 rounded-lg border cursor-pointer transition-all ${scope === 'all_with_filters' ? 'border-green-500 bg-green-50 dark:bg-green-900/20' : 'border-gray-200 dark:border-gray-700 hover:bg-gray-50 dark:hover:bg-gray-700/50'}`}>
                <input type="radio" name="scope" value="all_with_filters" checked={scope === 'all_with_filters'} onChange={() => setScope('all_with_filters')} className="text-green-600 focus:ring-green-500" />
                <div className="flex-1">
                  <div className="font-medium text-gray-900 dark:text-white">{t('maintenance.export.allWithFilters')}</div>
                  <div className="text-sm text-gray-500 dark:text-gray-400">{t('maintenance.export.allWithFiltersCount', { count: totalCount })}</div>
                </div>
                <span className="bg-purple-100 dark:bg-purple-900/40 text-purple-700 dark:text-purple-300 px-2 py-1 rounded text-xs font-medium">{totalCount} total</span>
              </label>
            </div>
          </div>

          <div className="mb-6">
            <h4 className="text-sm font-semibold text-gray-700 dark:text-gray-300 mb-3">{t('maintenance.export.exportFormat')}</h4>
            <div className="flex gap-3">
              <label className={`flex-1 flex items-center gap-3 p-3 rounded-lg border cursor-pointer transition-all ${format === 'csv' ? 'border-green-500 bg-green-50 dark:bg-green-900/20' : 'border-gray-200 dark:border-gray-700 hover:bg-gray-50 dark:hover:bg-gray-700/50'}`}>
                <input type="radio" name="format" value="csv" checked={format === 'csv'} onChange={() => setFormat('csv')} className="text-green-600 focus:ring-green-500" />
                <FaFileCsv className="text-green-600 text-xl" />
                <div><div className="font-medium text-gray-900 dark:text-white">{t('maintenance.export.csv')}</div><div className="text-xs text-gray-500 dark:text-gray-400">{t('maintenance.export.csvDesc')}</div></div>
              </label>
              <label className={`flex-1 flex items-center gap-3 p-3 rounded-lg border cursor-pointer transition-all ${format === 'excel' ? 'border-green-500 bg-green-50 dark:bg-green-900/20' : 'border-gray-200 dark:border-gray-700 hover:bg-gray-50 dark:hover:bg-gray-700/50'}`}>
                <input type="radio" name="format" value="excel" checked={format === 'excel'} onChange={() => setFormat('excel')} className="text-green-600 focus:ring-green-500" />
                <FaFileExcel className="text-green-700 text-xl" />
                <div><div className="font-medium text-gray-900 dark:text-white">{t('maintenance.export.excel')}</div><div className="text-xs text-gray-500 dark:text-gray-400">{t('maintenance.export.excelDesc')}</div></div>
              </label>
            </div>
          </div>

          <div>
            <div className="flex items-center justify-between mb-3">
              <h4 className="text-sm font-semibold text-gray-700 dark:text-gray-300">{t('maintenance.export.columnsToExport')}</h4>
              <div className="flex gap-2">
                <button onClick={selectAllColumns} className="text-xs text-blue-600 dark:text-blue-400 hover:underline">{t('maintenance.export.selectAll')}</button>
                <span className="text-gray-300 dark:text-gray-600">|</span>
                <button onClick={selectDefaultColumns} className="text-xs text-blue-600 dark:text-blue-400 hover:underline">{t('maintenance.export.resetToDefault')}</button>
              </div>
            </div>
            <div className="grid grid-cols-2 md:grid-cols-3 gap-2 max-h-48 overflow-y-auto p-3 bg-gray-50 dark:bg-gray-900/50 rounded-lg">
              {exportColumns.map((col) => (
                <label key={col.key} className={`flex items-center gap-2 p-2 rounded cursor-pointer transition-all ${selectedColumns.includes(col.key) ? 'bg-green-100 dark:bg-green-900/30 text-green-800 dark:text-green-300' : 'hover:bg-gray-100 dark:hover:bg-gray-800 text-gray-700 dark:text-gray-400'}`}>
                  <input type="checkbox" checked={selectedColumns.includes(col.key)} onChange={() => toggleColumn(col.key)} className="rounded text-green-600 focus:ring-green-500" />
                  <span className="text-sm truncate">{col.label}</span>
                </label>
              ))}
            </div>
            <p className="text-xs text-gray-500 dark:text-gray-400 mt-2">{t('maintenance.export.columnsSelected', { count: selectedColumns.length })}</p>
          </div>
        </div>

        <div className="px-6 py-4 bg-gray-50 dark:bg-gray-900/50 border-t border-gray-200 dark:border-gray-700 flex justify-between items-center">
          <div className="text-sm text-gray-600 dark:text-gray-400">
            {scope === 'selected' && t('maintenance.export.exportingSelected', { count: selectedCount })}
            {scope === 'all_on_page' && t('maintenance.export.exportingPage', { count: pageCount })}
            {scope === 'all_with_filters' && t('maintenance.export.exportingAll', { count: totalCount })}
          </div>
          <div className="flex gap-3">
            <button onClick={onClose} className="px-4 py-2 text-sm font-medium text-gray-700 dark:text-gray-300 hover:bg-gray-100 dark:hover:bg-gray-700 rounded-lg transition-colors" disabled={isExporting}>{t('common.cancel')}</button>
            <button onClick={() => onExport(scope, format, selectedColumns)} disabled={selectedColumns.length === 0 || isExporting} className="px-4 py-2 text-sm font-medium text-white bg-green-600 hover:bg-green-700 rounded-lg transition-colors flex items-center gap-2 disabled:opacity-50 disabled:cursor-not-allowed">
              {isExporting ? (<><div className="animate-spin rounded-full h-4 w-4 border-b-2 border-white"></div>{t('maintenance.export.exporting')}</>) : (<><FaDownload />{t('maintenance.export.exportButton')}</>)}
            </button>
          </div>
        </div>
      </div>
    </div>
  );
};

const MaintenanceTeamList: React.FC = () => {
  const { t } = useTranslation();
  const navigate = useNavigate();
  
  const EXPORT_COLUMNS = [
    { key: 'name', label: t('maintenance.teamId'), default: true },
    { key: 'maintenance_team_name', label: t('maintenance.teamName'), default: true },
    { key: 'maintenance_manager', label: t('maintenance.managerEmail'), default: true },
    { key: 'maintenance_manager_name', label: t('maintenance.managerName'), default: true },
    { key: 'company', label: t('commonFields.hospital'), default: true },
    { key: 'custom_expertise', label: t('maintenance.expertise'), default: true },
    { key: 'creation', label: t('commonFields.createdOn'), default: false },
    { key: 'modified', label: t('commonFields.modifiedOn'), default: false },
  ];

  const [searchParams, setSearchParams] = useSearchParams();
  const setSearchParamsRef = useRef(setSearchParams);

  useEffect(() => {
    setSearchParamsRef.current = setSearchParams;
  }, [setSearchParams]);
  const currentPage = useMemo(() => {
    const p = parseInt(searchParams.get('page') || '1', 10);
    return Number.isNaN(p) || p < 1 ? 1 : p;
  }, [searchParams]);
  const setCurrentPage = useCallback((pageOrUpdater: number | ((p: number) => number)) => {
    const next = typeof pageOrUpdater === 'function' ? pageOrUpdater(currentPage) : pageOrUpdater;
    setSearchParams((prev) => {
      const nextParams = new URLSearchParams(prev);
      nextParams.set('page', String(next));
      return nextParams;
    });
  }, [currentPage, setSearchParams]);
  const [pageSize] = useState(20);
  const [initialLoadComplete, setInitialLoadComplete] = useState(false);
  const [selectedRows, setSelectedRows] = useState<Set<string>>(new Set());
  const [showExportModal, setShowExportModal] = useState(false);
  const [isExporting, setIsExporting] = useState(false);
  const [deleteConfirmOpen, setDeleteConfirmOpen] = useState<string | null>(null);

  const [dateFilterBy, setDateFilterBy] = useState<'' | 'creation' | 'modified'>(() => (searchParams.get('date_filter_by') as '' | 'creation' | 'modified') || '');
  const [dateStart, setDateStart] = useState<string>(() => searchParams.get('date_start') || '');
  const [dateEnd, setDateEnd] = useState<string>(() => searchParams.get('date_end') || '');
  const [companyFilter, setCompanyFilter] = useState<string>(() => searchParams.get('company') || '');
  const [teamNameFilter, setTeamNameFilter] = useState<string>(() => searchParams.get('team_name') || '');
  const [sortBy, setSortBy] = useState<string>(() => searchParams.get('sort_by') || 'creation desc');

  const [isFilterExpanded, setIsFilterExpanded] = useState(false);
  const [activeFilterCount, setActiveFilterCount] = useState(0);
  const [savedFilters, setSavedFilters] = useState<any[]>([]);
  const [showSaveFilterModal, setShowSaveFilterModal] = useState(false);
  const [filterPresetName, setFilterPresetName] = useState('');

  useEffect(() => {
    const saved = localStorage.getItem('maintenanceTeamFilterPresets');
    if (saved) setSavedFilters(JSON.parse(saved));
  }, []);

  const hasDateFilter = dateFilterBy && (dateStart || dateEnd);
  useEffect(() => {
    const count = [companyFilter, teamNameFilter].filter(Boolean).length + (hasDateFilter ? 1 : 0);
    setActiveFilterCount(count);
  }, [companyFilter, teamNameFilter, hasDateFilter]);

  const apiFilters = useMemo(() => {
    const filters: Record<string, any> = {};
    if (companyFilter) filters['company'] = companyFilter;
    if (teamNameFilter) filters['name'] = teamNameFilter;
    Object.assign(filters, buildDateRangeFilters(dateFilterBy, dateStart, dateEnd));
    return filters;
  }, [companyFilter, teamNameFilter, dateFilterBy, dateStart, dateEnd]);

  const orderBy = ['creation desc', 'creation asc', 'modified desc', 'modified asc', 'name asc', 'name desc', 'maintenance_team_name asc', 'maintenance_team_name desc'].includes(sortBy) ? sortBy : 'creation desc';
  const { teams, loading, error, totalCount, refetch } = useMaintenanceTeamList({
    filters: apiFilters,
    limit_start: (currentPage - 1) * pageSize,
    limit_page_length: pageSize,
    order_by: orderBy,
  });

  useEffect(() => { if (!loading && !initialLoadComplete) setInitialLoadComplete(true); }, [loading, initialLoadComplete]);
  const filtersChangedOnce = useRef(false);
  useEffect(() => {
    if (!filtersChangedOnce.current) {
      filtersChangedOnce.current = true;
      return;
    }
    setSearchParamsRef.current((prev) => {
      const next = new URLSearchParams(prev);
      if (dateFilterBy) next.set('date_filter_by', dateFilterBy); else next.delete('date_filter_by');
      if (dateStart) next.set('date_start', dateStart); else next.delete('date_start');
      if (dateEnd) next.set('date_end', dateEnd); else next.delete('date_end');
      if (companyFilter) next.set('company', companyFilter); else next.delete('company');
      if (teamNameFilter) next.set('team_name', teamNameFilter); else next.delete('team_name');
      if (sortBy && sortBy !== 'creation desc') next.set('sort_by', sortBy); else next.delete('sort_by');
      next.set('page', '1');
      return next;
    });
  }, [dateFilterBy, dateStart, dateEnd, companyFilter, teamNameFilter, sortBy]);
  useEffect(() => { setSelectedRows(new Set()); }, [dateFilterBy, dateStart, dateEnd, companyFilter, teamNameFilter, currentPage]);

  const totalPages = Math.ceil(totalCount / pageSize);
  const formatDate = (dateStr?: string) => dateStr ? new Date(dateStr).toLocaleDateString('en-US', { year: 'numeric', month: 'short', day: 'numeric' }) : '-';

  const clearFilters = () => {
    setDateFilterBy(''); setDateStart(''); setDateEnd('');
    setSortBy('creation desc');
    setCompanyFilter(''); setTeamNameFilter('');
    setSearchParamsRef.current((prev) => {
      const next = new URLSearchParams(prev);
      next.delete('date_filter_by'); next.delete('date_start'); next.delete('date_end');
      next.delete('sort_by');
      next.delete('company'); next.delete('team_name');
      next.set('page', '1');
      return next;
    });
  };
  const hasActiveFilters = hasDateFilter || !!companyFilter || !!teamNameFilter;

  const handleSaveFilterPreset = () => {
    if (!filterPresetName.trim()) { alert('Please enter a filter name'); return; }
    const preset = { id: Date.now(), name: filterPresetName, filters: { dateFilterBy, dateStart, dateEnd, sortBy, companyFilter, teamNameFilter } };
    const updated = [...savedFilters, preset];
    setSavedFilters(updated);
    setFilterPresetName('');
    setShowSaveFilterModal(false);
    localStorage.setItem('maintenanceTeamFilterPresets', JSON.stringify(updated));
  };

  const handleLoadFilterPreset = (preset: any) => {
    const f = preset.filters;
    setDateFilterBy(f.dateFilterBy || ''); setDateStart(f.dateStart || ''); setDateEnd(f.dateEnd || '');
    setSortBy(f.sortBy || 'creation desc');
    setCompanyFilter(f.companyFilter || '');
    setTeamNameFilter(f.teamNameFilter || '');
  };

  const handleDeleteFilterPreset = (id: number) => {
    const updated = savedFilters.filter(f => f.id !== id);
    setSavedFilters(updated);
    localStorage.setItem('maintenanceTeamFilterPresets', JSON.stringify(updated));
  };

  const handleSelectRow = (teamName: string) => {
    setSelectedRows(prev => { const newSet = new Set(prev); newSet.has(teamName) ? newSet.delete(teamName) : newSet.add(teamName); return newSet; });
  };

  const handleSelectAll = () => { selectedRows.size === teams.length ? setSelectedRows(new Set()) : setSelectedRows(new Set(teams.map(t => t.name))); };
  const isAllSelected = teams.length > 0 && selectedRows.size === teams.length;
  const isSomeSelected = selectedRows.size > 0 && selectedRows.size < teams.length;

  const fetchAllTeamsForExport = useCallback(async (): Promise<any[]> => {
    const allTeams: any[] = [];
    let currentPageNum = 0;
    const pageSizeNum = 100;
    let hasMoreData = true;
    const filterArrays = toFrappeFilterArray(apiFilters);
    while (hasMoreData) {
      try {
        const response = await fetch('/api/method/frappe.client.get_list', {
          method: 'POST', headers: { 'Content-Type': 'application/json' },
          body: JSON.stringify({ doctype: 'Asset Maintenance Team', filters: filterArrays.length > 0 ? filterArrays : {}, fields: ['*'], limit_start: currentPageNum * pageSizeNum, limit_page_length: pageSizeNum, order_by: orderBy })
        });
        const data = await response.json();
        const results = data.message || [];
        allTeams.push(...results);
        if (results.length < pageSizeNum) hasMoreData = false; else currentPageNum++;
        if (currentPageNum > 100) { console.warn('Export safety limit reached'); hasMoreData = false; }
      } catch (error) { console.error('Error fetching teams for export:', error); throw error; }
    }
    return allTeams;
  }, [apiFilters]);

  const handleExport = async (scope: ExportScope, format: ExportFormat, columns: string[]) => {
    setIsExporting(true);
    try {
      let dataToExport: any[] = [];
      switch (scope) {
        case 'selected': dataToExport = teams.filter(t => selectedRows.has(t.name)); break;
        case 'all_on_page': dataToExport = teams; break;
        case 'all_with_filters': dataToExport = await fetchAllTeamsForExport(); break;
      }
      if (dataToExport.length === 0) { alert(t('assets.noDataToExport')); return; }
      const columnLabels = columns.map(key => EXPORT_COLUMNS.find(c => c.key === key)?.label || key);

      if (format === 'csv') {
        const csvContent = [columnLabels.join(','), ...dataToExport.map(team => columns.map(key => { let value = team[key] || ''; if (typeof value === 'string' && (value.includes(',') || value.includes('"') || value.includes('\n'))) value = `"${value.replace(/"/g, '""')}"`; return value; }).join(','))].join('\n');
        const blob = new Blob(['\ufeff' + csvContent], { type: 'text/csv;charset=utf-8;' });
        const url = URL.createObjectURL(blob);
        const link = document.createElement('a');
        link.href = url; link.download = `maintenance_teams_export_${new Date().toISOString().split('T')[0]}.csv`; link.click();
        URL.revokeObjectURL(url);
      } else if (format === 'excel') {
        const worksheetData = [columnLabels, ...dataToExport.map(team => columns.map(key => team[key] || ''))];
        const worksheet = XLSX.utils.aoa_to_sheet(worksheetData);
        const workbook = XLSX.utils.book_new();
        XLSX.utils.book_append_sheet(workbook, worksheet, 'Maintenance Teams');
        XLSX.writeFile(workbook, `maintenance_teams_export_${new Date().toISOString().split('T')[0]}.xlsx`);
      }
      setShowExportModal(false); setSelectedRows(new Set());
    } catch (error) { console.error('Export failed:', error); alert(`Export failed: ${error instanceof Error ? error.message : 'Unknown error'}`); }
    finally { setIsExporting(false); }
  };

  const handleDelete = async (teamName: string) => {
    try {
      const response = await fetch(`/api/resource/Asset Maintenance Team/${encodeURIComponent(teamName)}`, { method: 'DELETE', headers: { 'Content-Type': 'application/json' } });
      if (!response.ok) throw new Error('Failed to delete');
      setDeleteConfirmOpen(null); refetch(); alert(t('maintenance.deletedSuccessfully'));
    } catch (err) { alert(`Failed to delete: ${err instanceof Error ? err.message : 'Unknown error'}`); }
  };

  if (loading && !initialLoadComplete) {
    return (
      <div className="flex items-center justify-center h-screen bg-gray-50 dark:bg-gray-900">
        <div className="text-center">
          <div className="animate-spin rounded-full h-12 w-12 border-b-2 border-blue-500 mx-auto"></div>
          <p className="mt-4 text-gray-600 dark:text-gray-400">{t('maintenance.loadingTeams')}</p>
        </div>
      </div>
    );
  }

  if (error) {
    return (
      <div className="p-6 bg-gray-50 dark:bg-gray-900 min-h-screen">
        <div className="bg-red-50 dark:bg-red-900/20 border border-red-200 dark:border-red-800 rounded-lg p-6">
          <h2 className="text-xl font-bold text-red-800 dark:text-red-300 mb-4">{t('maintenance.errorLoadingTeams')}</h2>
          <p className="text-red-700 dark:text-red-400 mb-4">{error}</p>
          <button onClick={refetch} className="bg-blue-600 hover:bg-blue-700 text-white px-4 py-2 rounded">{t('common.tryAgain')}</button>
        </div>
      </div>
    );
  }

  return (
    <div className="p-6 bg-gray-50 dark:bg-gray-900 min-h-screen">
      {/* Header */}
      <div className="mb-6 flex justify-between items-center">
        <div>
          <div className="flex items-center gap-3">
            <FaUsers className="text-3xl text-indigo-600 dark:text-indigo-400" />
            <div>
              <h1 className="text-2xl font-bold text-gray-800 dark:text-white">{t('maintenance.listTitle')}</h1>
              <p className="text-sm text-gray-500 dark:text-gray-400">
                {t('issues.listTotal')}: {totalCount}
                {selectedRows.size > 0 && <span className="ml-2 text-blue-600 dark:text-blue-400">• {selectedRows.size} {t('issues.listSelected')}</span>}
                {loading && initialLoadComplete && <span className="ml-2 inline-flex items-center gap-1 text-xs text-blue-600 dark:text-blue-400"><div className="animate-spin rounded-full h-3 w-3 border-b-2 border-blue-500"></div>{t('common.filtering')}</span>}
              </p>
            </div>
          </div>
        </div>
        <div className="flex gap-3">
          <button onClick={() => setIsFilterExpanded(!isFilterExpanded)} className={`px-4 py-2 rounded-lg flex items-center gap-2 transition-colors ${isFilterExpanded || hasActiveFilters ? 'bg-blue-100 text-blue-700 dark:bg-blue-900/30 dark:text-blue-300' : 'bg-gray-100 text-gray-700 dark:bg-gray-700 dark:text-gray-300 hover:bg-gray-200 dark:hover:bg-gray-600'}`}>
            <FaFilter />{t('listPages.filters')}
            {activeFilterCount > 0 && <span className="bg-blue-600 text-white text-xs px-1.5 py-0.5 rounded-full">{activeFilterCount}</span>}
          </button>
          <button onClick={refetch} disabled={loading} className="px-4 py-2 rounded-lg bg-gray-100 text-gray-700 dark:bg-gray-700 dark:text-gray-300 hover:bg-gray-200 dark:hover:bg-gray-600 flex items-center gap-2 disabled:opacity-50">
            <FaSync className={loading ? 'animate-spin' : ''} />{t('listPages.refresh')}
          </button>
          <button onClick={() => setShowExportModal(true)} className="bg-green-600 hover:bg-green-700 text-white px-4 py-2 rounded-lg flex items-center gap-2 shadow transition-all" disabled={totalCount === 0}>
            <FaFileExport /><span className="font-medium">{t('listPages.export')}</span>
            {selectedRows.size > 0 && <span className="bg-white/20 px-1.5 py-0.5 rounded text-xs">{selectedRows.size}</span>}
          </button>
          <button onClick={() => navigate('/maintenance-teams/new')} className="bg-indigo-600 hover:bg-indigo-700 text-white px-4 py-2 rounded-lg flex items-center gap-2 shadow-lg transition-all hover:shadow-xl">
            <FaPlus /><span className="font-medium">{t('maintenance.newMaintenanceTeam')}</span>
          </button>
        </div>
      </div>

      {/* Stats Cards */}
      {/* <div className="grid grid-cols-1 md:grid-cols-3 gap-4 mb-4">
        <div className="bg-white dark:bg-gray-800 rounded-lg shadow p-4 border border-gray-200 dark:border-gray-700">
          <div className="flex items-center justify-between"><div><p className="text-sm text-gray-500 dark:text-gray-400">Total Teams</p><p className="text-2xl font-bold text-gray-800 dark:text-white">{totalCount}</p></div><FaUsers className="text-3xl text-indigo-500" /></div>
        </div>
        <div className="bg-white dark:bg-gray-800 rounded-lg shadow p-4 border border-gray-200 dark:border-gray-700">
          <div className="flex items-center justify-between"><div><p className="text-sm text-gray-500 dark:text-gray-400">Managers</p><p className="text-2xl font-bold text-blue-600">{new Set(teams.map(t => t.maintenance_manager).filter(Boolean)).size}</p></div><FaUserTie className="text-3xl text-blue-500" /></div>
        </div>
        <div className="bg-white dark:bg-gray-800 rounded-lg shadow p-4 border border-gray-200 dark:border-gray-700">
          <div className="flex items-center justify-between"><div><p className="text-sm text-gray-500 dark:text-gray-400">Hospitals</p><p className="text-2xl font-bold text-green-600">{new Set(teams.map(t => t.company).filter(Boolean)).size}</p></div><FaBuilding className="text-3xl text-green-500" /></div>
        </div>
      </div> */}

      {/* Expandable Filter Panel */}
      {isFilterExpanded && (
        <div className="bg-white dark:bg-gray-800 rounded-lg shadow-lg border border-gray-200 dark:border-gray-700 mb-4">
          <div className="bg-gradient-to-r from-indigo-500 to-indigo-600 dark:from-indigo-600 dark:to-indigo-700 px-4 py-3 rounded-t-lg">
            <div className="flex items-center justify-between gap-4">
              <div className="flex items-center gap-3">
                <FaFilter className="text-white" size={16} /><h3 className="text-white font-semibold text-sm">{t('listPages.filters')}</h3>
                {activeFilterCount > 0 && <span className="bg-white text-indigo-600 px-2 py-0.5 rounded-full text-xs font-bold">{activeFilterCount}</span>}
              </div>
              {hasActiveFilters && (
                <div className="flex-1 overflow-x-auto scrollbar-hide mx-2">
                  <div className="flex items-center gap-2 py-1">
                    {hasDateFilter && <span className="inline-flex items-center gap-1.5 px-2.5 py-1 bg-white/90 text-amber-700 rounded-full text-[10px] font-medium whitespace-nowrap shadow-sm"><span className="font-semibold">{dateFilterBy === 'creation' ? t('filters.createdDate') : t('filters.latestModifiedDate')}:</span> {[dateStart, dateEnd].filter(Boolean).join(' – ')}<button onClick={() => { setDateFilterBy(''); setDateStart(''); setDateEnd(''); }} className="hover:text-red-500"><FaTimes className="text-[9px]" /></button></span>}
                    {companyFilter && <span className="inline-flex items-center gap-1.5 px-2.5 py-1 bg-white/90 text-green-700 rounded-full text-[10px] font-medium whitespace-nowrap shadow-sm"><span className="font-semibold">{t('filters.hospital')}:</span> {companyFilter}<button onClick={() => setCompanyFilter('')} className="hover:text-red-500"><FaTimes className="text-[9px]" /></button></span>}
                    {teamNameFilter && <span className="inline-flex items-center gap-1.5 px-2.5 py-1 bg-white/90 text-indigo-700 rounded-full text-[10px] font-medium whitespace-nowrap shadow-sm"><span className="font-semibold">{t('maintenance.teamName')}:</span> {teamNameFilter}<button onClick={() => setTeamNameFilter('')} className="hover:text-red-500"><FaTimes className="text-[9px]" /></button></span>}
                  </div>
                </div>
              )}
              <div className="flex items-center gap-2 flex-shrink-0">
                {activeFilterCount > 0 && <button onClick={() => setShowSaveFilterModal(true)} className="px-3 py-1.5 bg-white text-indigo-600 hover:bg-indigo-50 rounded-md text-xs font-medium transition-all flex items-center gap-1.5"><FaSave size={12} /><span className="hidden sm:inline">{t('listPages.saveFilterPreset')}</span></button>}
                {hasActiveFilters && <button onClick={clearFilters} className="px-3 py-1.5 bg-red-500 hover:bg-red-600 text-white rounded-md text-xs font-medium transition-all flex items-center gap-1.5"><FaTimes size={12} /><span className="hidden sm:inline">{t('listPages.clearFilters')}</span></button>}
              </div>
            </div>
          </div>
          <div className="p-4">
            {savedFilters.length > 0 && (
              <div className="mb-4 pb-4 border-b border-gray-200 dark:border-gray-700">
                <h4 className="text-xs font-semibold text-gray-700 dark:text-gray-300 mb-2 flex items-center gap-2"><FaStar className="text-yellow-500" size={12} />{t('inspections.savedFilters')}</h4>
                <div className="flex flex-wrap gap-2">
                  {savedFilters.map((preset) => (
                    <div key={preset.id} className="group relative inline-flex items-center gap-2 px-3 py-1.5 bg-gradient-to-r from-purple-100 to-indigo-100 dark:from-purple-900/30 dark:to-indigo-900/30 border border-purple-200 dark:border-purple-700 rounded-lg hover:shadow-md transition-all">
                      <button onClick={() => handleLoadFilterPreset(preset)} className="text-xs font-medium text-purple-700 dark:text-purple-300">{preset.name}</button>
                      <button onClick={() => handleDeleteFilterPreset(preset.id)} className="opacity-0 group-hover:opacity-100 text-red-500 hover:text-red-700 transition-opacity"><FaTrash size={10} /></button>
                    </div>
                  ))}
                </div>
              </div>
            )}
            <div className="bg-gray-50 dark:bg-gray-900/50 p-3 rounded-lg">
              <div className="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-4 gap-3 mb-3">
                {/* Sort By */}
                <div className="relative">
                  <label className="block text-[10px] font-medium text-gray-700 dark:text-gray-300 mb-0.5">{t('filters.sortBy')}</label>
                  <select
                    value={sortBy}
                    onChange={(e) => { setSortBy(e.target.value); setCurrentPage(1); }}
                    className="w-full px-2 py-1 text-xs border border-gray-300 dark:border-gray-600 rounded focus:outline-none focus:ring-2 focus:ring-indigo-500 bg-white dark:bg-gray-700 text-gray-900 dark:text-white"
                  >
                    <option value="creation desc">{t('filters.sortCreationNewest')}</option>
                    <option value="creation asc">{t('filters.sortCreationOldest')}</option>
                    <option value="modified desc">{t('filters.sortModifiedNewest')}</option>
                    <option value="modified asc">{t('filters.sortModifiedOldest')}</option>
                    <option value="name asc">{t('filters.sortNameAsc')}</option>
                    <option value="name desc">{t('filters.sortNameDesc')}</option>
                    <option value="maintenance_team_name asc">{t('filters.sortTeamNameAsc')}</option>
                    <option value="maintenance_team_name desc">{t('filters.sortTeamNameDesc')}</option>
                  </select>
                </div>
                <div className="relative">
                  <label className="block text-[10px] font-medium text-gray-700 dark:text-gray-300 mb-0.5">{t('filters.filterBy')}</label>
                  <select value={dateFilterBy} onChange={(e) => { const v = e.target.value as '' | 'creation' | 'modified'; setDateFilterBy(v); setCurrentPage(1); }} className="w-full px-2 py-1 text-xs border border-gray-300 dark:border-gray-600 rounded focus:outline-none focus:ring-2 focus:ring-indigo-500 bg-white dark:bg-gray-700 text-gray-900 dark:text-white">
                    <option value="">{t('filters.filterBy')}</option>
                    <option value="creation">{t('filters.createdDate')}</option>
                    <option value="modified">{t('filters.latestModifiedDate')}</option>
                  </select>
                </div>
                {dateFilterBy && (
                  <>
                    <div className="relative">
                      <label className="block text-[10px] font-medium text-gray-700 dark:text-gray-300 mb-0.5">{t('filters.startDate')}</label>
                      <input type="date" value={dateStart} onChange={(e) => { const v = e.target.value; setDateStart(v); if (dateEnd && v > dateEnd) setDateEnd(v); setCurrentPage(1); }} className="w-full px-2 py-1 text-xs border border-gray-300 dark:border-gray-600 rounded focus:outline-none focus:ring-2 focus:ring-indigo-500 bg-white dark:bg-gray-700 text-gray-900 dark:text-white" />
                    </div>
                    <div className="relative">
                      <label className="block text-[10px] font-medium text-gray-700 dark:text-gray-300 mb-0.5">{t('filters.endDate')}</label>
                      <input type="date" value={dateEnd} onChange={(e) => { setDateEnd(e.target.value); setCurrentPage(1); }} min={dateStart || undefined} className="w-full px-2 py-1 text-xs border border-gray-300 dark:border-gray-600 rounded focus:outline-none focus:ring-2 focus:ring-indigo-500 bg-white dark:bg-gray-700 text-gray-900 dark:text-white" />
                    </div>
                  </>
                )}
              </div>
              <div className="grid grid-cols-1 md:grid-cols-2 gap-3">
                <div className="relative z-[60]">
                  <LinkField label="Hospital" doctype="Company" value={companyFilter} onChange={(val) => { setCompanyFilter(val); setCurrentPage(1); }} placeholder="Select Hospital" disabled={false} compact={true} />
                  {companyFilter && <button onClick={() => setCompanyFilter('')} className="absolute right-2 top-6 text-gray-400 hover:text-red-500 transition-colors z-10"><FaTimes size={10} /></button>}
                </div>
                <div className="relative z-[59]">
                  <LinkField label={t('maintenance.teamName')} doctype="Asset Maintenance Team" value={teamNameFilter} onChange={(val) => { setTeamNameFilter(val); setCurrentPage(1); }} placeholder={t('maintenance.selectTeam')} disabled={false} compact={true} />
                  {teamNameFilter && <button onClick={() => setTeamNameFilter('')} className="absolute right-2 top-6 text-gray-400 hover:text-red-500 transition-colors z-10"><FaTimes size={10} /></button>}
                </div>
              </div>
            </div>
          </div>
        </div>
      )}

      {/* Save Filter Modal */}
      {showSaveFilterModal && (
        <div className="fixed inset-0 bg-black/50 flex items-center justify-center z-50 p-4">
          <div className="bg-white dark:bg-gray-800 rounded-lg shadow-xl max-w-md w-full p-6 animate-scale-in">
            <h3 className="text-lg font-semibold text-gray-900 dark:text-white mb-4">{t('listPages.saveFilterPreset')}</h3>
            <input type="text" value={filterPresetName} onChange={(e) => setFilterPresetName(e.target.value)} onKeyDown={(e) => { if (e.key === 'Enter') { e.preventDefault(); handleSaveFilterPreset(); } }} placeholder={t('listPages.enterFilterName')} className="w-full px-3 py-2 border border-gray-300 dark:border-gray-600 rounded-md focus:outline-none focus:ring-2 focus:ring-indigo-500 bg-white dark:bg-gray-700 text-gray-900 dark:text-white mb-4" autoFocus />
            <div className="flex gap-2 justify-end">
              <button onClick={() => { setShowSaveFilterModal(false); setFilterPresetName(''); }} className="px-4 py-2 text-sm font-medium text-gray-700 dark:text-gray-300 hover:bg-gray-100 dark:hover:bg-gray-700 rounded-md transition-colors">{t('common.cancel')}</button>
              <button onClick={handleSaveFilterPreset} className="px-4 py-2 text-sm font-medium text-white bg-indigo-600 hover:bg-indigo-700 rounded-md transition-colors flex items-center gap-2"><FaSave size={12} />{t('listPages.saveFilter')}</button>
            </div>
          </div>
        </div>
      )}

      {/* Export Modal */}
      <ExportModal isOpen={showExportModal} onClose={() => setShowExportModal(false)} selectedCount={selectedRows.size} totalCount={totalCount} pageCount={teams.length} onExport={handleExport} isExporting={isExporting} exportColumns={EXPORT_COLUMNS} />

      {/* Table */}
      <div className="bg-white dark:bg-gray-800 rounded-lg shadow border border-gray-200 dark:border-gray-700 overflow-hidden relative">
        {loading && initialLoadComplete && (
          <div className="absolute inset-0 bg-white/60 dark:bg-gray-800/60 flex items-center justify-center z-10 backdrop-blur-[1px]">
            <div className="flex items-center gap-3 bg-white dark:bg-gray-700 px-4 py-2 rounded-lg shadow-lg"><div className="animate-spin rounded-full h-5 w-5 border-b-2 border-indigo-500"></div><span className="text-sm text-gray-600 dark:text-gray-300">{t('listPages.filtering')}</span></div>
          </div>
        )}
        <div className="overflow-x-auto">
          <table className="w-full">
            <thead className="bg-gray-100 dark:bg-gray-700 border-b border-gray-200 dark:border-gray-600">
              <tr>
                <th className="px-4 py-3 text-left">
                  <button onClick={handleSelectAll} className="text-gray-500 dark:text-gray-400 hover:text-indigo-600 dark:hover:text-indigo-400 transition-colors" title={isAllSelected ? t('listPages.deselectAllTitle') : t('listPages.selectAllTitle')}>
                    {isAllSelected ? <FaCheckSquare className="text-indigo-600 dark:text-indigo-400" size={18} /> : isSomeSelected ? <div className="relative"><FaSquare size={18} /><div className="absolute inset-0 flex items-center justify-center"><div className="w-2 h-0.5 bg-current"></div></div></div> : <FaSquare size={18} />}
                  </button>
                </th>
                <th className="px-4 py-3 text-left text-xs font-medium text-gray-500 dark:text-gray-400 uppercase tracking-wider">{t('maintenance.teamName')}</th>
                <th className="px-4 py-3 text-left text-xs font-medium text-gray-500 dark:text-gray-400 uppercase tracking-wider">{t('maintenance.managerName')}</th>
                <th className="px-4 py-3 text-left text-xs font-medium text-gray-500 dark:text-gray-400 uppercase tracking-wider">{t('commonFields.hospital')}</th>
                <th className="px-4 py-3 text-left text-xs font-medium text-gray-500 dark:text-gray-400 uppercase tracking-wider">{t('maintenance.expertise')}</th>
                <th className="px-4 py-3 text-left text-xs font-medium text-gray-500 dark:text-gray-400 uppercase tracking-wider">{t('commonFields.createdOn')}</th>
                <th className="px-4 py-3 text-left text-xs font-medium text-gray-500 dark:text-gray-400 uppercase tracking-wider">{t('listPages.actions')}</th>
              </tr>
            </thead>
            <tbody className="bg-white dark:bg-gray-800 divide-y divide-gray-200 dark:divide-gray-700">
              {teams.length === 0 ? (
                <tr>
                  <td colSpan={7} className="px-4 py-12 text-center text-gray-500 dark:text-gray-400">
                    <div className="flex flex-col items-center">
                      <FaUsers className="text-4xl text-gray-300 dark:text-gray-600 mb-2" />
                      <p>{t('listPages.noMaintenanceTeamsFound')}</p>
                      {hasActiveFilters ? (
                        <button onClick={clearFilters} className="mt-4 text-indigo-600 dark:text-indigo-400 hover:underline">
                          {t('common.clearFilters')}
                        </button>
                      ) : (
                        <button onClick={() => navigate('/maintenance-teams/new')} className="mt-4 text-indigo-600 dark:text-indigo-400 hover:underline">
                          {t('listPages.createFirstTeam')}
                        </button>
                      )}
                    </div>
                  </td>
                </tr>
              ) : teams.map((team) => (
                <tr key={team.name} className={`hover:bg-gray-50 dark:hover:bg-gray-700/50 cursor-pointer transition-colors ${selectedRows.has(team.name) ? 'bg-indigo-50 dark:bg-indigo-900/20' : ''}`} onClick={() => navigate(`/maintenance-teams/${team.name}`)}>
                  <td className="px-4 py-3" onClick={(e) => e.stopPropagation()}>
                    <button onClick={() => handleSelectRow(team.name)} className="text-gray-500 dark:text-gray-400 hover:text-indigo-600 dark:hover:text-indigo-400 transition-colors">
                      {selectedRows.has(team.name) ? <FaCheckSquare className="text-indigo-600 dark:text-indigo-400" size={18} /> : <FaSquare size={18} />}
                    </button>
                  </td>
                  <td className="px-4 py-3">
                    <div className="text-sm font-medium text-gray-900 dark:text-white">{team.maintenance_team_name}</div>
                    <div className="text-xs text-gray-500 dark:text-gray-400">{team.name}</div>
                  </td>
                  <td className="px-4 py-3">
                    <div className="text-sm text-gray-900 dark:text-white">{team.maintenance_manager_name || '-'}</div>
                    <div className="text-xs text-gray-500 dark:text-gray-400">{team.maintenance_manager || '-'}</div>
                  </td>
                  <td className="px-4 py-3"><span className="text-sm text-gray-600 dark:text-gray-300">{team.company || '-'}</span></td>
                  <td className="px-4 py-3">
                    {team.custom_expertise ? (
                      <span className="inline-flex px-2 py-1 text-xs font-medium rounded-full bg-indigo-100 text-indigo-800 dark:bg-indigo-900/30 dark:text-indigo-300">{team.custom_expertise}</span>
                    ) : <span className="text-gray-400">-</span>}
                  </td>
                  <td className="px-4 py-3"><span className="text-sm text-gray-600 dark:text-gray-300">{formatDate(team.creation)}</span></td>
                  <td className="px-4 py-3">
                    <div className="flex items-center gap-1" onClick={(e) => e.stopPropagation()}>
                      <button onClick={() => navigate(`/maintenance-teams/${team.name}`)} className="text-blue-600 dark:text-blue-400 hover:text-blue-900 dark:hover:text-blue-300 p-2 hover:bg-blue-50 dark:hover:bg-blue-900/30 rounded transition-colors" title={t('maintenance.viewDetails')}><FaEye /></button>
                      <button onClick={() => navigate(`/maintenance-teams/${team.name}`)} className="text-green-600 dark:text-green-400 hover:text-green-900 dark:hover:text-green-300 p-2 hover:bg-green-50 dark:hover:bg-green-900/30 rounded transition-colors" title={t('maintenance.editTeam')}><FaEdit /></button>
                      <button onClick={() => navigate(`/maintenance-teams/new?duplicate=${team.name}`)} className="text-purple-600 dark:text-purple-400 hover:text-purple-900 dark:hover:text-purple-300 p-2 hover:bg-purple-50 dark:hover:bg-purple-900/30 rounded transition-colors" title={t('maintenance.duplicateTeam')}><FaCopy /></button>
                      <button onClick={() => setDeleteConfirmOpen(team.name)} className="text-red-600 dark:text-red-400 hover:text-red-900 dark:hover:text-red-300 p-2 hover:bg-red-50 dark:hover:bg-red-900/30 rounded transition-colors" title={t('maintenance.deleteTeam')}><FaTrash /></button>
                    </div>
                  </td>
                </tr>
              ))}
            </tbody>
          </table>
        </div>

        <ListPagination
          currentPage={currentPage}
          totalCount={totalCount}
          pageSize={pageSize}
          itemLabel={t('pagination.teams')}
          onPageChange={(p) => setCurrentPage(p)}
        />
      </div>

      {/* Delete Confirmation Modal */}
      {deleteConfirmOpen && (
        <div className="fixed inset-0 bg-black bg-opacity-50 flex items-center justify-center z-50">
          <div className="bg-white dark:bg-gray-800 rounded-lg p-6 max-w-md w-full mx-4 shadow-2xl">
            <div className="flex items-start gap-4">
              <div className="flex-shrink-0 w-12 h-12 rounded-full bg-red-100 dark:bg-red-900/30 flex items-center justify-center"><FaTrash className="text-red-600 dark:text-red-400 text-xl" /></div>
              <div className="flex-1">
                <h3 className="text-lg font-semibold text-gray-900 dark:text-white mb-2">{t('maintenance.deleteTeam')}</h3>
                <p className="text-sm text-gray-600 dark:text-gray-400 mb-4">{t('maintenance.deleteConfirmMessage')}</p>
                <div className="bg-yellow-50 dark:bg-yellow-900/20 border border-yellow-200 dark:border-yellow-800 rounded-md p-3 mb-4"><p className="text-xs text-yellow-800 dark:text-yellow-300"><strong>{t('maintenance.team')}:</strong> {deleteConfirmOpen}</p></div>
                <div className="flex gap-3 justify-end">
                  <button onClick={() => setDeleteConfirmOpen(null)} className="px-4 py-2 text-sm font-medium text-gray-700 dark:text-gray-300 bg-gray-100 dark:bg-gray-700 hover:bg-gray-200 dark:hover:bg-gray-600 rounded-lg transition-colors">{t('common.cancel')}</button>
                  <button onClick={() => handleDelete(deleteConfirmOpen)} className="px-4 py-2 text-sm font-medium text-white bg-red-600 hover:bg-red-700 rounded-lg transition-colors flex items-center gap-2"><FaTrash />{t('maintenance.deleteTeamButton')}</button>
                </div>
              </div>
            </div>
          </div>
        </div>
      )}

      <style>{`
        @keyframes scale-in { from { transform: scale(0.95); opacity: 0; } to { transform: scale(1); opacity: 1; } }
        .animate-scale-in { animation: scale-in 0.2s ease-out; }
        .scrollbar-hide { -ms-overflow-style: none; scrollbar-width: none; }
        .scrollbar-hide::-webkit-scrollbar { display: none; }
      `}</style>
    </div>
  );
};

export default MaintenanceTeamList;