/**
 * 단가배포 목록 클라이언트 컴포넌트
 *
 * UniversalListPage 공통 템플릿 활용
 * - 탭 없음, 통계 카드 없음
 * - 상태 필터: filterConfig (SELECT 드롭다운)
 */

'use client';

import { useState, useEffect, useCallback, useMemo } from 'react';
import { useRouter } from 'next/navigation';
import { FileText, FilePlus } from 'lucide-react';
import { Button } from '@/components/ui/button';
import { Badge } from '@/components/ui/badge';
import { Checkbox } from '@/components/ui/checkbox';
import { TableRow, TableCell } from '@/components/ui/table';
import {
  AlertDialog,
  AlertDialogAction,
  AlertDialogCancel,
  AlertDialogContent,
  AlertDialogDescription,
  AlertDialogFooter,
  AlertDialogHeader,
  AlertDialogTitle,
} from '@/components/ui/alert-dialog';
import {
  UniversalListPage,
  type UniversalListConfig,
  type TableColumn,
  type FilterFieldConfig,
  type SelectionHandlers,
  type RowClickHandlers,
} from '@/components/templates/UniversalListPage';
import { ListMobileCard, InfoField } from '@/components/organisms/MobileCard';
import { toast } from 'sonner';
import type { PriceDistributionListItem, DistributionStatus } from './types';
import {
  DISTRIBUTION_STATUS_LABELS,
  DISTRIBUTION_STATUS_STYLES,
} from './types';
import {
  getPriceDistributionList,
  createPriceDistribution,
  deletePriceDistribution,
} from './actions';

export function PriceDistributionList() {
  const router = useRouter();
  const [data, setData] = useState<PriceDistributionListItem[]>([]);
  const [isLoading, setIsLoading] = useState(true);
  const [showRegisterDialog, setShowRegisterDialog] = useState(false);
  const [isRegistering, setIsRegistering] = useState(false);
  const pageSize = 20;

  // 날짜 범위 상태 (최근 30일)
  const today = new Date();
  const thirtyDaysAgo = new Date(today.getTime() - 30 * 24 * 60 * 60 * 1000);
  const [startDate, setStartDate] = useState<string>(thirtyDaysAgo.toISOString().split('T')[0]);
  const [endDate, setEndDate] = useState<string>(today.toISOString().split('T')[0]);

  // 데이터 로드
  const loadData = useCallback(async () => {
    setIsLoading(true);
    try {
      const listResult = await getPriceDistributionList();
      if (listResult.success && listResult.data) {
        setData(listResult.data.items);
      }
    } finally {
      setIsLoading(false);
    }
  }, []);

  useEffect(() => {
    loadData();
  }, [loadData]);

  // 검색 필터
  const searchFilter = (item: PriceDistributionListItem, search: string) => {
    const s = search.toLowerCase();
    return (
      item.distributionNo.toLowerCase().includes(s) ||
      item.distributionName.toLowerCase().includes(s) ||
      item.author.toLowerCase().includes(s)
    );
  };

  // 상태 Badge 렌더링
  const renderStatusBadge = (status: DistributionStatus) => {
    const style = DISTRIBUTION_STATUS_STYLES[status];
    const label = DISTRIBUTION_STATUS_LABELS[status];
    return (
      <Badge
        variant="outline"
        className={`${style.bg} ${style.text} ${style.border}`}
      >
        {label}
      </Badge>
    );
  };

  // 등록 핸들러
  const handleRegister = async () => {
    setIsRegistering(true);
    try {
      const result = await createPriceDistribution();
      if (result.success && result.data) {
        toast.success('단가배포가 등록되었습니다.');
        setShowRegisterDialog(false);
        router.push(`/master-data/price-distribution/${result.data.id}`);
      } else {
        toast.error(result.error || '등록에 실패했습니다.');
      }
    } catch {
      toast.error('등록 중 오류가 발생했습니다.');
    } finally {
      setIsRegistering(false);
    }
  };

  // 행 클릭 → 상세
  const handleRowClick = (item: PriceDistributionListItem) => {
    router.push(`/master-data/price-distribution/${item.id}`);
  };

  // 상태 필터 설정
  const filterConfig: FilterFieldConfig[] = [
    {
      key: 'status',
      label: '상태',
      type: 'single',
      options: [
        { value: 'initial', label: '최초작성' },
        { value: 'revision', label: '보이수정' },
        { value: 'finalized', label: '최종확정' },
      ],
    },
  ];

  // 커스텀 필터 함수
  const customFilterFn = (items: PriceDistributionListItem[], filterValues: Record<string, string | string[]>) => {
    const status = filterValues.status as string;
    if (!status || status === '') return items;
    return items.filter((item) => item.status === status);
  };

  // 테이블 컬럼
  const tableColumns: TableColumn[] = useMemo(() => [
    { key: 'rowNumber', label: '번호', className: 'w-[60px] text-center' },
    { key: 'distributionNo', label: '단가배포번호', className: 'min-w-[120px]' },
    { key: 'distributionName', label: '단가배포명', className: 'min-w-[150px]' },
    { key: 'status', label: '상태', className: 'min-w-[100px]' },
    { key: 'author', label: '작성자', className: 'min-w-[100px]' },
    { key: 'createdAt', label: '등록일', className: 'min-w-[120px]' },
  ], []);

  // 테이블 행 렌더링
  const renderTableRow = (
    item: PriceDistributionListItem,
    index: number,
    globalIndex: number,
    handlers: SelectionHandlers & RowClickHandlers<PriceDistributionListItem>
  ) => {
    const { isSelected, onToggle } = handlers;

    return (
      <TableRow
        key={item.id}
        className="hover:bg-muted/50 cursor-pointer"
        onClick={() => handleRowClick(item)}
      >
        <TableCell className="text-center" onClick={(e) => e.stopPropagation()}>
          <Checkbox checked={isSelected} onCheckedChange={onToggle} />
        </TableCell>
        <TableCell className="text-muted-foreground text-center">
          {globalIndex}
        </TableCell>
        <TableCell>
          <code className="text-xs bg-gray-100 px-2 py-1 rounded">
            {item.distributionNo}
          </code>
        </TableCell>
        <TableCell>
          <span className="font-medium">{item.distributionName}</span>
        </TableCell>
        <TableCell>{renderStatusBadge(item.status)}</TableCell>
        <TableCell className="text-muted-foreground">{item.author}</TableCell>
        <TableCell className="text-muted-foreground">
          {new Date(item.createdAt).toLocaleDateString('ko-KR')}
        </TableCell>
      </TableRow>
    );
  };

  // 모바일 카드 렌더링
  const renderMobileCard = (
    item: PriceDistributionListItem,
    index: number,
    globalIndex: number,
    handlers: SelectionHandlers & RowClickHandlers<PriceDistributionListItem>
  ) => {
    const { isSelected, onToggle } = handlers;
    return (
      <ListMobileCard
        key={item.id}
        id={item.id}
        title={item.distributionName}
        headerBadges={
          <code className="text-xs bg-gray-100 px-2 py-1 rounded">
            {item.distributionNo}
          </code>
        }
        statusBadge={renderStatusBadge(item.status)}
        isSelected={isSelected}
        onToggleSelection={onToggle}
        onCardClick={() => handleRowClick(item)}
        infoGrid={
          <div className="grid grid-cols-2 gap-x-4 gap-y-3">
            <InfoField label="작성자" value={item.author} />
            <InfoField
              label="등록일"
              value={new Date(item.createdAt).toLocaleDateString('ko-KR')}
            />
          </div>
        }
      />
    );
  };

  // 헤더 액션
  const headerActions = () => (
    <Button
      variant="default"
      size="sm"
      onClick={() => setShowRegisterDialog(true)}
      className="ml-auto gap-2 bg-gray-900 text-white hover:bg-gray-800"
    >
      <FilePlus className="h-4 w-4" />
      단가배포 등록
    </Button>
  );

  // UniversalListPage 설정
  const listConfig: UniversalListConfig<PriceDistributionListItem> = {
    title: '단가배포 목록',
    description: '단가표 기준 거래처별 단가 배포를 관리합니다',
    icon: FileText,
    basePath: '/master-data/price-distribution',
    idField: 'id',

    actions: {
      getList: async () => ({
        success: true,
        data: data,
        totalCount: data.length,
      }),
      deleteBulk: async (ids: string[]) => {
        const result = await deletePriceDistribution(ids);
        return { success: result.success, error: result.error };
      },
    },

    columns: tableColumns,
    headerActions,
    filterConfig,

    // 날짜 범위 필터 + 프리셋 버튼
    dateRangeSelector: {
      enabled: true,
      showPresets: true,
      startDate,
      endDate,
      onStartDateChange: setStartDate,
      onEndDateChange: setEndDate,
      dateField: 'createdAt',
    },

    searchPlaceholder: '단가배포번호, 단가배포명, 작성자 검색...',
    itemsPerPage: pageSize,
    clientSideFiltering: true,
    searchFilter,
    customFilterFn,

    renderTableRow,
    renderMobileCard,
  };

  return (
    <>
      <UniversalListPage<PriceDistributionListItem>
        config={listConfig}
        initialData={data}
        initialTotalCount={data.length}
      />

      {/* 단가배포 등록 확인 다이얼로그 */}
      <AlertDialog open={showRegisterDialog} onOpenChange={setShowRegisterDialog}>
        <AlertDialogContent>
          <AlertDialogHeader>
            <AlertDialogTitle>알림</AlertDialogTitle>
            <AlertDialogDescription className="space-y-2">
              <span className="block font-semibold text-foreground">
                새로운 단가배포 버전을 등록하시겠습니까?
              </span>
              <span className="block text-muted-foreground">
                현재 단가표 기준으로 자동 생성됩니다.
              </span>
            </AlertDialogDescription>
          </AlertDialogHeader>
          <AlertDialogFooter>
            <AlertDialogCancel disabled={isRegistering}>취소</AlertDialogCancel>
            <AlertDialogAction
              onClick={handleRegister}
              disabled={isRegistering}
            >
              {isRegistering ? '등록 중...' : '등록'}
            </AlertDialogAction>
          </AlertDialogFooter>
        </AlertDialogContent>
      </AlertDialog>
    </>
  );
}

export default PriceDistributionList;