'use client';

/**
 * 카드 내역 조회 - UniversalListPage 마이그레이션
 *
 * 기존 IntegratedListTemplateV2 → UniversalListPage config 기반으로 변환
 * - 클라이언트 사이드 필터링/페이지네이션
 * - dateRangeSelector (헤더 액션)
 * - beforeTableContent: 계정과목명 선택 + 저장 버튼 + 새로고침
 * - tableHeaderActions: 2개 Select 필터 (카드명, 정렬)
 * - tableFooter: 합계 행
 * - showRowNumber={false}
 * - 상세 모달 (수정 기능)
 * - 계정과목명 일괄 저장 다이얼로그
 */

import { useState, useMemo, useCallback, useEffect } from 'react';
import { useRouter } from 'next/navigation';
import { format, startOfMonth, endOfMonth } from 'date-fns';
import { CreditCard, Plus, RefreshCw, Save, Loader2, Search } from 'lucide-react';
import { Button } from '@/components/ui/button';
import { Checkbox } from '@/components/ui/checkbox';
import { Input } from '@/components/ui/input';
import { Label } from '@/components/ui/label';
import { TableRow, TableCell } from '@/components/ui/table';
import {
  Dialog,
  DialogContent,
  DialogDescription,
  DialogFooter,
  DialogHeader,
  DialogTitle,
} from '@/components/ui/dialog';
import {
  AlertDialog,
  AlertDialogAction,
  AlertDialogContent,
  AlertDialogDescription,
  AlertDialogFooter,
  AlertDialogHeader,
  AlertDialogTitle,
} from '@/components/ui/alert-dialog';
import {
  Select,
  SelectContent,
  SelectItem,
  SelectTrigger,
  SelectValue,
} from '@/components/ui/select';
import { MobileCard } from '@/components/organisms/MobileCard';
import {
  UniversalListPage,
  type UniversalListConfig,
  type SelectionHandlers,
  type RowClickHandlers,
  type StatCard,
} from '@/components/templates/UniversalListPage';
import type { CardTransaction, SortOption } from './types';
import { SORT_OPTIONS, ACCOUNT_SUBJECT_OPTIONS, USAGE_TYPE_OPTIONS } from './types';
import {
  getCardTransactionList,
  getCardTransactionSummary,
  bulkUpdateAccountCode,
} from './actions';
import { isNextRedirectError } from '@/lib/utils/redirect-error';

// ===== 테이블 컬럼 정의 =====
const tableColumns = [
  { key: 'card', label: '카드' },
  { key: 'cardName', label: '카드명' },
  { key: 'user', label: '사용자' },
  { key: 'usedAt', label: '사용일시' },
  { key: 'merchantName', label: '가맹점명' },
  { key: 'amount', label: '사용금액', className: 'text-right' },
  { key: 'usageType', label: '사용유형' },
];

// ===== Props =====
interface CardTransactionInquiryProps {
  initialData?: CardTransaction[];
  initialSummary?: {
    previousMonthTotal: number;
    currentMonthTotal: number;
  };
  initialPagination?: {
    currentPage: number;
    lastPage: number;
    perPage: number;
    total: number;
  };
}

export function CardTransactionInquiry({
  initialData = [],
  initialSummary,
  initialPagination,
}: CardTransactionInquiryProps) {
  const router = useRouter();

  // ===== 외부 상태 (UniversalListPage 외부에서 관리) =====
  const [data, setData] = useState<CardTransaction[]>(initialData);
  const [summary, setSummary] = useState(
    initialSummary || { previousMonthTotal: 0, currentMonthTotal: 0 }
  );
  const [pagination, setPagination] = useState(
    initialPagination || { currentPage: 1, lastPage: 1, perPage: 20, total: 0 }
  );

  // 필터 상태
  const [searchQuery, setSearchQuery] = useState('');
  const [sortOption, setSortOption] = useState<SortOption>('latest');
  const [cardFilter, setCardFilter] = useState<string>('all');
  const [currentPage, setCurrentPage] = useState(initialPagination?.currentPage || 1);
  const [isLoading, setIsLoading] = useState(!initialData.length);
  const itemsPerPage = 20;

  // 상단 계정과목명 선택 (저장용)
  const [selectedAccountSubject, setSelectedAccountSubject] = useState<string>('unset');

  // 계정과목명 저장 다이얼로그
  const [showSaveDialog, setShowSaveDialog] = useState(false);
  const [isSaving, setIsSaving] = useState(false);

  // 선택 필요 알림 다이얼로그
  const [showSelectWarningDialog, setShowSelectWarningDialog] = useState(false);

  // 상세 모달 상태
  const [showDetailModal, setShowDetailModal] = useState(false);
  const [selectedItem, setSelectedItem] = useState<CardTransaction | null>(null);
  const [detailFormData, setDetailFormData] = useState({
    memo: '',
    usageType: 'unset',
  });
  const [isDetailSaving, setIsDetailSaving] = useState(false);

  // 선택된 항목 (외부 관리)
  const [selectedItems, setSelectedItems] = useState<Set<string>>(new Set());

  // 날짜 범위 상태
  const [startDate, setStartDate] = useState(() => format(startOfMonth(new Date()), 'yyyy-MM-dd'));
  const [endDate, setEndDate] = useState(() => format(endOfMonth(new Date()), 'yyyy-MM-dd'));

  // ===== 데이터 로드 =====
  const loadData = useCallback(async () => {
    setIsLoading(true);
    try {
      const sortMapping: Record<SortOption, { sortBy: string; sortDir: 'asc' | 'desc' }> = {
        latest: { sortBy: 'used_at', sortDir: 'desc' },
        oldest: { sortBy: 'used_at', sortDir: 'asc' },
        amountHigh: { sortBy: 'amount', sortDir: 'desc' },
        amountLow: { sortBy: 'amount', sortDir: 'asc' },
      };
      const sortParams = sortMapping[sortOption];

      const [listResult, summaryResult] = await Promise.all([
        getCardTransactionList({
          page: currentPage,
          perPage: itemsPerPage,
          startDate,
          endDate,
          search: searchQuery || undefined,
          sortBy: sortParams.sortBy,
          sortDir: sortParams.sortDir,
        }),
        getCardTransactionSummary({ startDate, endDate }),
      ]);

      if (listResult.success) {
        setData(listResult.data);
        setPagination(listResult.pagination);
      }

      if (summaryResult.success && summaryResult.data) {
        setSummary({
          previousMonthTotal: summaryResult.data.previousMonthTotal,
          currentMonthTotal: summaryResult.data.currentMonthTotal,
        });
      }
    } catch (error) {
      if (isNextRedirectError(error)) throw error;
      console.error('[CardTransactionInquiry] loadData error:', error);
    } finally {
      setIsLoading(false);
    }
  }, [currentPage, startDate, endDate, searchQuery, sortOption]);

  // 데이터 로드 (필터 변경 시)
  useEffect(() => {
    loadData();
  }, [loadData]);

  // ===== 카드명 옵션 =====
  const cardOptions = useMemo(() => {
    const uniqueCards = [...new Set(data.map((d) => d.cardName))];
    return [
      { value: 'all', label: '전체' },
      ...uniqueCards.map((card) => ({ value: card, label: card })),
    ];
  }, [data]);

  // ===== 필터링된 데이터 =====
  const filteredData = useMemo(() => {
    let result = data.filter(
      (item) =>
        item.card.includes(searchQuery) ||
        item.cardName.includes(searchQuery) ||
        item.user.includes(searchQuery) ||
        item.merchantName.includes(searchQuery)
    );

    // 카드명 필터
    if (cardFilter !== 'all') {
      result = result.filter((item) => item.cardName === cardFilter);
    }

    // 정렬
    switch (sortOption) {
      case 'oldest':
        result.sort((a, b) => new Date(a.usedAt).getTime() - new Date(b.usedAt).getTime());
        break;
      case 'amountHigh':
        result.sort((a, b) => b.amount - a.amount);
        break;
      case 'amountLow':
        result.sort((a, b) => a.amount - b.amount);
        break;
      default: // latest
        result.sort((a, b) => new Date(b.usedAt).getTime() - new Date(a.usedAt).getTime());
        break;
    }

    return result;
  }, [data, searchQuery, cardFilter, sortOption]);

  // ===== 핸들러 =====
  const handleRowClick = useCallback((item: CardTransaction) => {
    setSelectedItem(item);
    setDetailFormData({
      memo: item.memo || '',
      usageType: item.usageType || 'unset',
    });
    setShowDetailModal(true);
  }, []);

  const handleDetailSave = useCallback(async () => {
    if (!selectedItem) return;

    setIsDetailSaving(true);
    try {
      // 임시: 로컬 데이터 업데이트
      setData((prev) =>
        prev.map((item) =>
          item.id === selectedItem.id
            ? { ...item, memo: detailFormData.memo, usageType: detailFormData.usageType }
            : item
        )
      );

      setShowDetailModal(false);
      setSelectedItem(null);
    } catch (error) {
      console.error('[CardTransactionInquiry] handleDetailSave error:', error);
    } finally {
      setIsDetailSaving(false);
    }
  }, [selectedItem, detailFormData]);

  const handleRefresh = useCallback(() => {
    loadData();
  }, [loadData]);

  // ===== 계정과목명 저장 핸들러 =====
  const handleSaveAccountSubject = useCallback(() => {
    if (selectedItems.size === 0) {
      setShowSelectWarningDialog(true);
      return;
    }
    setShowSaveDialog(true);
  }, [selectedItems.size]);

  const handleConfirmSaveAccountSubject = useCallback(async () => {
    if (selectedAccountSubject === 'unset') return;

    setIsSaving(true);
    try {
      const ids = Array.from(selectedItems).map((id) => parseInt(id, 10));
      const result = await bulkUpdateAccountCode(ids, selectedAccountSubject);

      if (result.success) {
        await loadData();
        setSelectedItems(new Set());
        setSelectedAccountSubject('unset');
      } else {
        console.error('[CardTransactionInquiry] bulkUpdate error:', result.error);
      }
    } catch (error) {
      console.error('[CardTransactionInquiry] bulkUpdate error:', error);
    } finally {
      setIsSaving(false);
      setShowSaveDialog(false);
    }
  }, [selectedAccountSubject, selectedItems, loadData]);

  // ===== 사용유형 라벨 변환 함수 =====
  const getUsageTypeLabel = useCallback((value: string) => {
    return USAGE_TYPE_OPTIONS.find((opt) => opt.value === value)?.label || '미설정';
  }, []);

  // ===== 테이블 합계 계산 =====
  const totalAmount = useMemo(() => {
    return filteredData.reduce((sum, item) => sum + item.amount, 0);
  }, [filteredData]);

  // ===== UniversalListPage Config =====
  const config: UniversalListConfig<CardTransaction> = useMemo(
    () => ({
      // 페이지 기본 정보
      title: '카드 내역 조회',
      description: '법인카드 사용 내역을 조회합니다',
      icon: CreditCard,
      basePath: '/accounting/card-transactions',

      // ID 추출
      idField: 'id',

      // API 액션
      actions: {
        getList: async () => {
          return {
            success: true,
            data: filteredData,
            totalCount: filteredData.length,
          };
        },
      },

      // 테이블 컬럼
      columns: tableColumns,

      // 클라이언트 사이드 필터링
      clientSideFiltering: true,
      itemsPerPage,

      // 행 번호 숨기기
      showRowNumber: false,

      // 검색
      searchPlaceholder: '카드, 카드명, 사용자, 가맹점명 검색...',
      searchFilter: (item, searchValue) => {
        const search = searchValue.toLowerCase();
        return (
          item.card.toLowerCase().includes(search) ||
          item.cardName.toLowerCase().includes(search) ||
          item.user.toLowerCase().includes(search) ||
          item.merchantName.toLowerCase().includes(search)
        );
      },

      // 필터 설정 (모바일용)
      filterConfig: [
        {
          key: 'card',
          label: '카드',
          type: 'single',
          options: cardOptions.filter((o) => o.value !== 'all'),
        },
        {
          key: 'sortBy',
          label: '정렬',
          type: 'single',
          options: SORT_OPTIONS.map((o) => ({
            value: o.value,
            label: o.label,
          })),
        },
      ],
      initialFilters: {
        card: 'all',
        sortBy: 'latest',
      },
      filterTitle: '카드 필터',

      // 헤더 액션: 계정과목명 Select + 저장 + 새로고침
      headerActions: () => (
        <div className="flex items-center gap-2">
          <span className="text-sm font-medium text-gray-700 whitespace-nowrap">계정과목명</span>
          <Select value={selectedAccountSubject} onValueChange={setSelectedAccountSubject}>
            <SelectTrigger className="w-[120px]">
              <SelectValue placeholder="선택" />
            </SelectTrigger>
            <SelectContent>
              {ACCOUNT_SUBJECT_OPTIONS.map((option) => (
                <SelectItem key={option.value} value={option.value}>
                  {option.label}
                </SelectItem>
              ))}
            </SelectContent>
          </Select>
          <Button onClick={handleSaveAccountSubject} size="sm">
            <Save className="h-4 w-4 mr-1" />
            저장
          </Button>
          <Button variant="outline" size="sm" onClick={handleRefresh} disabled={isLoading}>
            {isLoading ? (
              <Loader2 className="h-4 w-4 mr-1 animate-spin" />
            ) : (
              <RefreshCw className="h-4 w-4 mr-1" />
            )}
            {isLoading ? '조회중...' : '새로고침'}
          </Button>
        </div>
      ),

      // 등록 버튼
      createButton: {
        label: '카드내역 등록',
        icon: Plus,
        onClick: () => router.push('/ko/accounting/card-transactions?mode=new'),
      },

      // 커스텀 필터 함수
      customFilterFn: (items) => {
        if (!items || items.length === 0) return items;
        let result = [...items];

        // 검색어 필터
        if (searchQuery) {
          const search = searchQuery.toLowerCase();
          result = result.filter((item) =>
            item.card.toLowerCase().includes(search) ||
            item.cardName.toLowerCase().includes(search) ||
            item.user.toLowerCase().includes(search) ||
            item.merchantName.toLowerCase().includes(search)
          );
        }

        // 카드명 필터
        if (cardFilter !== 'all') {
          result = result.filter((item) => item.cardName === cardFilter);
        }

        return result;
      },

      // 커스텀 정렬 함수
      customSortFn: (items) => {
        const sorted = [...items];

        switch (sortOption) {
          case 'oldest':
            sorted.sort((a, b) => new Date(a.usedAt).getTime() - new Date(b.usedAt).getTime());
            break;
          case 'amountHigh':
            sorted.sort((a, b) => b.amount - a.amount);
            break;
          case 'amountLow':
            sorted.sort((a, b) => a.amount - b.amount);
            break;
          default: // latest
            sorted.sort((a, b) => new Date(b.usedAt).getTime() - new Date(a.usedAt).getTime());
            break;
        }

        return sorted;
      },

      // 날짜 선택기 (헤더 액션)
      // 검색창 (공통 컴포넌트에서 자동 생성)
      hideSearch: true,
      searchValue: searchQuery,
      onSearchChange: setSearchQuery,
      searchPlaceholder: '카드, 카드명, 사용자, 가맹점명 검색...',

      dateRangeSelector: {
        enabled: true,
        showPresets: true,
        startDate,
        endDate,
        onStartDateChange: setStartDate,
        onEndDateChange: setEndDate,
      },

      // 선택 항목 변경 콜백
      onSelectionChange: setSelectedItems,

      // 테이블 헤더 액션 (2개 필터)
      tableHeaderActions: () => (
        <div className="flex items-center gap-2 flex-wrap">
          {/* 카드명 필터 */}
          <Select value={cardFilter} onValueChange={setCardFilter}>
            <SelectTrigger className="w-[150px]">
              <SelectValue placeholder="카드" />
            </SelectTrigger>
            <SelectContent>
              {cardOptions.map((option) => (
                <SelectItem key={option.value} value={option.value}>
                  {option.label}
                </SelectItem>
              ))}
            </SelectContent>
          </Select>

          {/* 정렬 */}
          <Select value={sortOption} onValueChange={(value) => setSortOption(value as SortOption)}>
            <SelectTrigger className="w-[120px]">
              <SelectValue placeholder="정렬" />
            </SelectTrigger>
            <SelectContent>
              {SORT_OPTIONS.map((option) => (
                <SelectItem key={option.value} value={option.value}>
                  {option.label}
                </SelectItem>
              ))}
            </SelectContent>
          </Select>
        </div>
      ),

      // 테이블 푸터 (합계 행)
      tableFooter: (
        <TableRow className="bg-muted/50 font-medium">
          <TableCell className="text-center" />
          <TableCell colSpan={5} className="text-right font-bold">
            합계
          </TableCell>
          <TableCell className="text-right font-bold">{totalAmount.toLocaleString()}</TableCell>
          <TableCell />
        </TableRow>
      ),

      // Stats 카드
      computeStats: (): StatCard[] => [
        {
          label: '전월 사용액',
          value: `${summary.previousMonthTotal.toLocaleString()}원`,
          icon: CreditCard,
          iconColor: 'text-gray-500',
        },
        {
          label: '당월 사용액',
          value: `${summary.currentMonthTotal.toLocaleString()}원`,
          icon: CreditCard,
          iconColor: 'text-blue-500',
        },
      ],

      // 테이블 행 렌더링
      renderTableRow: (
        item: CardTransaction,
        index: number,
        globalIndex: number,
        handlers: SelectionHandlers & RowClickHandlers<CardTransaction>
      ) => (
        <TableRow
          key={item.id}
          className="hover:bg-muted/50 cursor-pointer"
          onClick={() => handleRowClick(item)}
        >
          {/* 체크박스 */}
          <TableCell className="text-center" onClick={(e) => e.stopPropagation()}>
            <Checkbox checked={handlers.isSelected} onCheckedChange={handlers.onToggle} />
          </TableCell>
          {/* 카드 */}
          <TableCell>{item.card}</TableCell>
          {/* 카드명 */}
          <TableCell>{item.cardName}</TableCell>
          {/* 사용자 */}
          <TableCell>{item.user}</TableCell>
          {/* 사용일시 */}
          <TableCell>{item.usedAt}</TableCell>
          {/* 가맹점명 */}
          <TableCell>{item.merchantName}</TableCell>
          {/* 사용금액 */}
          <TableCell className="text-right font-medium">{item.amount.toLocaleString()}</TableCell>
          {/* 사용유형 */}
          <TableCell>{getUsageTypeLabel(item.usageType)}</TableCell>
        </TableRow>
      ),

      // 모바일 카드 렌더링
      renderMobileCard: (
        item: CardTransaction,
        index: number,
        globalIndex: number,
        handlers: SelectionHandlers & RowClickHandlers<CardTransaction>
      ) => (
        <MobileCard
          key={item.id}
          title={`${item.card} - ${item.cardName}`}
          subtitle={`${item.user} | ${item.usedAt}`}
          isSelected={handlers.isSelected}
          onToggle={handlers.onToggle}
          onClick={() => handleRowClick(item)}
          details={[
            { label: '가맹점명', value: item.merchantName },
            { label: '사용금액', value: `${item.amount.toLocaleString()}원` },
            { label: '사용유형', value: getUsageTypeLabel(item.usageType) },
          ]}
        />
      ),
    }),
    [
      filteredData,
      cardOptions,
      cardFilter,
      sortOption,
      startDate,
      endDate,
      summary,
      totalAmount,
      selectedAccountSubject,
      isLoading,
      router,
      handleRowClick,
      handleRefresh,
      handleSaveAccountSubject,
      getUsageTypeLabel,
    ]
  );

  return (
    <>
      <UniversalListPage config={config} initialData={filteredData} externalIsLoading={isLoading} />

      {/* 계정과목명 저장 확인 다이얼로그 */}
      <Dialog open={showSaveDialog} onOpenChange={setShowSaveDialog}>
        <DialogContent className="sm:max-w-[425px]">
          <DialogHeader>
            <DialogTitle>계정과목명 변경</DialogTitle>
            <DialogDescription>
              {selectedItems.size}개의 카드 사용 내역을{' '}
              <span className="font-semibold text-orange-500">
                {ACCOUNT_SUBJECT_OPTIONS.find((o) => o.value === selectedAccountSubject)?.label}
              </span>
              (으)로 모두 변경하시겠습니까?
            </DialogDescription>
          </DialogHeader>
          <DialogFooter className="gap-2 sm:gap-0">
            <Button variant="outline" onClick={() => setShowSaveDialog(false)} disabled={isSaving}>
              취소
            </Button>
            <Button
              onClick={handleConfirmSaveAccountSubject}
              className="bg-blue-500 hover:bg-blue-600"
              disabled={isSaving}
            >
              {isSaving ? (
                <>
                  <Loader2 className="h-4 w-4 mr-2 animate-spin" />
                  저장 중...
                </>
              ) : (
                '확인'
              )}
            </Button>
          </DialogFooter>
        </DialogContent>
      </Dialog>

      {/* 선택 필요 알림 다이얼로그 */}
      <AlertDialog open={showSelectWarningDialog} onOpenChange={setShowSelectWarningDialog}>
        <AlertDialogContent>
          <AlertDialogHeader>
            <AlertDialogTitle>항목 선택 필요</AlertDialogTitle>
            <AlertDialogDescription>
              변경할 카드 사용 내역을 먼저 선택해주세요.
            </AlertDialogDescription>
          </AlertDialogHeader>
          <AlertDialogFooter>
            <AlertDialogAction onClick={() => setShowSelectWarningDialog(false)}>
              확인
            </AlertDialogAction>
          </AlertDialogFooter>
        </AlertDialogContent>
      </AlertDialog>

      {/* 카드 내역 상세 모달 */}
      <Dialog open={showDetailModal} onOpenChange={setShowDetailModal}>
        <DialogContent className="sm:max-w-[500px]">
          <DialogHeader>
            <DialogTitle>카드 내역 상세</DialogTitle>
            <DialogDescription>카드 사용 상세 내역을 등록합니다</DialogDescription>
          </DialogHeader>

          {selectedItem && (
            <div className="space-y-6 py-4">
              <div className="border rounded-lg p-4 bg-gray-50">
                <h4 className="font-medium text-gray-800 mb-4">기본 정보</h4>
                <div className="grid grid-cols-2 gap-4">
                  <div>
                    <Label className="text-sm text-gray-500">사용일시</Label>
                    <p className="mt-1 text-sm font-medium">{selectedItem.usedAt}</p>
                  </div>
                  <div>
                    <Label className="text-sm text-gray-500">카드</Label>
                    <p className="mt-1 text-sm font-medium">
                      {selectedItem.card} ({selectedItem.cardName})
                    </p>
                  </div>
                  <div>
                    <Label className="text-sm text-gray-500">사용자</Label>
                    <p className="mt-1 text-sm font-medium">{selectedItem.user}</p>
                  </div>
                  <div>
                    <Label className="text-sm text-gray-500">사용금액</Label>
                    <p className="mt-1 text-sm font-medium">
                      {selectedItem.amount.toLocaleString()}원
                    </p>
                  </div>
                  <div>
                    <Label htmlFor="detail-memo" className="text-sm text-gray-500">
                      적요
                    </Label>
                    <Input
                      id="detail-memo"
                      value={detailFormData.memo}
                      onChange={(e) =>
                        setDetailFormData((prev) => ({ ...prev, memo: e.target.value }))
                      }
                      placeholder="적요"
                      className="mt-1"
                    />
                  </div>
                  <div>
                    <Label className="text-sm text-gray-500">가맹점</Label>
                    <p className="mt-1 text-sm font-medium">{selectedItem.merchantName}</p>
                  </div>
                  <div className="col-span-2">
                    <Label htmlFor="detail-usage-type" className="text-sm text-gray-500">
                      사용 유형
                    </Label>
                    <Select
                      key={`usage-type-${detailFormData.usageType}`}
                      value={detailFormData.usageType}
                      onValueChange={(value) =>
                        setDetailFormData((prev) => ({ ...prev, usageType: value }))
                      }
                    >
                      <SelectTrigger id="detail-usage-type" className="mt-1">
                        <SelectValue placeholder="선택" />
                      </SelectTrigger>
                      <SelectContent>
                        {USAGE_TYPE_OPTIONS.map((option) => (
                          <SelectItem key={option.value} value={option.value}>
                            {option.label}
                          </SelectItem>
                        ))}
                      </SelectContent>
                    </Select>
                  </div>
                </div>
              </div>
            </div>
          )}

          <DialogFooter>
            <Button
              onClick={handleDetailSave}
              className="bg-blue-500 hover:bg-blue-600"
              disabled={isDetailSaving}
            >
              {isDetailSaving ? (
                <>
                  <Loader2 className="h-4 w-4 mr-2 animate-spin" />
                  저장 중...
                </>
              ) : (
                '수정'
              )}
            </Button>
          </DialogFooter>
        </DialogContent>
      </Dialog>
    </>
  );
}