'use client';

/**
 * 1:1 문의 목록 - UniversalListPage 마이그레이션
 *
 * 기존 IntegratedListTemplateV2 → UniversalListPage config 기반으로 변환
 * - 날짜 범위 선택 + 문의 등록 버튼
 * - 필터 3개: 상담분류, 상태, 정렬 (PC: 인라인, 모바일: 바텀시트)
 */

import { useState, useMemo, useCallback } from 'react';
import { useRouter } from 'next/navigation';
import { MessageSquare } from 'lucide-react';
import { format } from 'date-fns';
import { TableCell, TableRow } from '@/components/ui/table';
import { Card, CardContent } from '@/components/ui/card';
import { Checkbox } from '@/components/ui/checkbox';
import { Badge } from '@/components/ui/badge';
import {
  UniversalListPage,
  type UniversalListConfig,
  type SelectionHandlers,
  type RowClickHandlers,
} from '@/components/templates/UniversalListPage';
import {
  type Inquiry,
  type InquiryCategory,
  type InquiryStatus,
  type SortOption,
  CATEGORY_FILTER_OPTIONS,
  INQUIRY_STATUSES,
  SORT_OPTIONS,
  INQUIRY_CATEGORY_LABELS,
  INQUIRY_STATUS_LABELS,
  transformPostToInquiry,
} from './types';
import { getPosts, deletePost } from '../shared/actions';

export function InquiryList() {
  const router = useRouter();

  // ===== 날짜 범위 상태 (외부 관리) =====
  const [startDate, setStartDate] = useState('');
  const [endDate, setEndDate] = useState('');

  // ===== 행 클릭 핸들러 =====
  const handleRowClick = useCallback(
    (item: Inquiry) => {
      router.push(`/ko/customer-center/qna/${item.id}`);
    },
    [router]
  );

  const handleCreate = useCallback(() => {
    router.push('/ko/customer-center/qna/create');
  }, [router]);

  // ===== 상태 Badge 색상 =====
  const getStatusBadge = useCallback((status: InquiryStatus) => {
    if (status === 'waiting') {
      return (
        <Badge variant="secondary" className="bg-yellow-100 text-yellow-700">
          {INQUIRY_STATUS_LABELS[status]}
        </Badge>
      );
    }
    return (
      <Badge variant="secondary" className="bg-green-100 text-green-700">
        {INQUIRY_STATUS_LABELS[status]}
      </Badge>
    );
  }, []);

  // ===== UniversalListPage Config =====
  const config: UniversalListConfig<Inquiry> = useMemo(
    () => ({
      // 페이지 기본 정보
      title: '1:1 문의',
      description: '1:1 문의를 등록하고 답변을 확인합니다.',
      icon: MessageSquare,
      basePath: '/customer-center/qna',

      // ID 추출
      idField: 'id',

      // API 액션
      actions: {
        getList: async () => {
          const result = await getPosts('qna', { per_page: 100 });
          if (result.success && result.data) {
            const transformed = result.data.data.map(transformPostToInquiry);
            return { success: true, data: transformed, totalCount: transformed.length };
          }
          return { success: false, error: result.error };
        },
        deleteItem: async (id: string) => {
          const result = await deletePost('qna', id);
          return { success: result.success, error: result.error };
        },
      },

      // 테이블 컬럼
      columns: [
        { key: 'no', label: 'No.', className: 'w-[60px] text-center' },
        { key: 'category', label: '상담분류', className: 'w-[120px]' },
        { key: 'title', label: '제목', className: 'min-w-[200px]' },
        { key: 'status', label: '상태', className: 'w-[100px] text-center' },
        { key: 'createdAt', label: '등록일', className: 'w-[120px] text-center' },
      ],

      // 클라이언트 사이드 필터링
      clientSideFiltering: true,
      itemsPerPage: 10,

      // 검색 필터
      searchPlaceholder: '제목, 작성자로 검색...',
      searchFilter: (item, searchValue) => {
        const searchLower = searchValue.toLowerCase();
        return (
          item.title.toLowerCase().includes(searchLower) ||
          item.authorName.toLowerCase().includes(searchLower)
        );
      },

      // 커스텀 필터 (날짜 + 카테고리 + 상태)
      customFilterFn: (items, filterValues) => {
        let result = [...items];

        // 날짜 필터
        if (startDate && endDate) {
          result = result.filter((item) => {
            const itemDate = format(new Date(item.createdAt), 'yyyy-MM-dd');
            return itemDate >= startDate && itemDate <= endDate;
          });
        }

        // 상담분류 필터
        const categoryFilter = filterValues.category as string;
        if (categoryFilter && categoryFilter !== 'all') {
          result = result.filter((item) => item.category === categoryFilter);
        }

        // 상태 필터
        const statusFilter = filterValues.status as string;
        if (statusFilter && statusFilter !== 'all') {
          result = result.filter((item) => item.status === statusFilter);
        }

        return result;
      },

      // 커스텀 정렬
      customSortFn: (items, filterValues) => {
        const sorted = [...items];
        const sortOption = (filterValues.sort as SortOption) || 'latest';

        if (sortOption === 'latest') {
          sorted.sort(
            (a, b) => new Date(b.createdAt).getTime() - new Date(a.createdAt).getTime()
          );
        } else {
          sorted.sort(
            (a, b) => new Date(a.createdAt).getTime() - new Date(b.createdAt).getTime()
          );
        }

        return sorted;
      },

      // 필터 설정 (PC: 인라인, 모바일: 바텀시트)
      // IntegratedListTemplateV2에서 "전체" 옵션을 자동 추가하므로 중복 방지를 위해 "all" 제외
      filterConfig: [
        {
          key: 'category',
          label: '상담분류',
          type: 'single',
          options: CATEGORY_FILTER_OPTIONS.filter((opt) => opt.value !== 'all').map((opt) => ({
            value: opt.value,
            label: opt.label,
          })),
        },
        {
          key: 'status',
          label: '상태',
          type: 'single',
          options: INQUIRY_STATUSES.filter((opt) => opt.value !== 'all').map((opt) => ({ value: opt.value, label: opt.label })),
        },
        {
          key: 'sort',
          label: '정렬',
          type: 'single',
          options: SORT_OPTIONS.map((opt) => ({ value: opt.value, label: opt.label })),
        },
      ],
      initialFilters: { category: 'all', status: 'all', sort: 'latest' },

      // 공통 헤더 옵션: 날짜 선택기 (왼쪽)
      dateRangeSelector: {
        enabled: true,
        startDate,
        endDate,
        onStartDateChange: setStartDate,
        onEndDateChange: setEndDate,
      },
      // 공통 헤더 옵션: 등록 버튼 (오른쪽 끝)
      createButton: {
        label: '문의 등록',
        onClick: handleCreate,
      },

      // 테이블 헤더 액션 (총 건수만 표시)
      tableHeaderActions: ({ totalCount }) => (
        <span className="text-sm text-muted-foreground whitespace-nowrap">
          총 {totalCount}건
        </span>
      ),

      // 테이블 행 렌더링
      renderTableRow: (
        item: Inquiry,
        index: number,
        globalIndex: number,
        handlers: SelectionHandlers & RowClickHandlers<Inquiry>
      ) => {
        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={handlers.isSelected}
                onCheckedChange={handlers.onToggle}
              />
            </TableCell>
            <TableCell className="text-center">{globalIndex}</TableCell>
            <TableCell>
              <Badge variant="outline">{INQUIRY_CATEGORY_LABELS[item.category]}</Badge>
            </TableCell>
            <TableCell>{item.title}</TableCell>
            <TableCell className="text-center">{getStatusBadge(item.status)}</TableCell>
            <TableCell className="text-center">
              {format(new Date(item.createdAt), 'yyyy-MM-dd')}
            </TableCell>
          </TableRow>
        );
      },

      // 모바일 카드 렌더링
      renderMobileCard: (
        item: Inquiry,
        index: number,
        globalIndex: number,
        handlers: SelectionHandlers & RowClickHandlers<Inquiry>
      ) => {
        return (
          <Card
            className="cursor-pointer hover:bg-muted/50"
            onClick={() => handleRowClick(item)}
          >
            <CardContent className="p-4">
              <div className="flex items-start gap-3">
                <div onClick={(e) => e.stopPropagation()}>
                  <Checkbox
                    checked={handlers.isSelected}
                    onCheckedChange={handlers.onToggle}
                  />
                </div>
                <div className="flex-1 space-y-2">
                  <div className="flex items-center justify-between">
                    <div className="flex items-center gap-2">
                      <span className="text-sm text-muted-foreground">#{globalIndex}</span>
                      <Badge variant="outline">{INQUIRY_CATEGORY_LABELS[item.category]}</Badge>
                    </div>
                    {getStatusBadge(item.status)}
                  </div>
                  <h3 className="font-medium">{item.title}</h3>
                  <div className="text-sm text-muted-foreground">
                    {format(new Date(item.createdAt), 'yyyy-MM-dd')}
                  </div>
                </div>
              </div>
            </CardContent>
          </Card>
        );
      },
    }),
    [startDate, endDate, handleRowClick, handleCreate, getStatusBadge]
  );

  return <UniversalListPage config={config} />;
}

export default InquiryList;