'use client';

/**
 * 발주관리 리스트 - UniversalListPage 버전
 *
 * 특이 케이스:
 * - ScheduleCalendar 컴포넌트 (beforeTableContent)
 * - 9개의 다중선택 필터
 * - 달력 날짜 클릭 시 테이블 필터링
 * - 클라이언트 사이드 필터링/페이지네이션
 */

import { useState, useMemo, useCallback, useEffect } from 'react';
import { useRouter } from 'next/navigation';
import { Package, Pencil, Trash2, Plus } from 'lucide-react';
import { Button } from '@/components/ui/button';
import { TableCell, TableRow } from '@/components/ui/table';
import { Checkbox } from '@/components/ui/checkbox';
import { MultiSelectCombobox, MultiSelectOption } from '@/components/ui/multi-select-combobox';
import { ListMobileCard, InfoField } from '@/components/organisms/ListMobileCard';
import { Badge } from '@/components/ui/badge';
import {
  UniversalListPage,
  type UniversalListConfig,
  type SelectionHandlers,
  type RowClickHandlers,
  type FilterFieldConfig,
} from '@/components/templates/UniversalListPage';
import { DateRangeSelector } from '@/components/molecules/DateRangeSelector';
import { ScheduleCalendar, ScheduleEvent, DayBadge } from '@/components/common/ScheduleCalendar';
import { format, parseISO, isSameDay, startOfDay } from 'date-fns';
import type { Order } from './types';
import {
  ORDER_STATUS_OPTIONS,
  ORDER_SORT_OPTIONS,
  ORDER_STATUS_STYLES,
  ORDER_STATUS_LABELS,
  ORDER_TYPE_OPTIONS,
  ORDER_TYPE_LABELS,
  MOCK_PARTNERS,
  MOCK_SITES,
  MOCK_CONSTRUCTION_PM,
  MOCK_ORDER_MANAGERS,
  MOCK_ORDER_COMPANIES,
  MOCK_WORK_TEAM_LEADERS,
  getScheduleColorByManager,
} from './types';
import {
  getOrderList,
  deleteOrder,
  deleteOrders,
} from './actions';

interface OrderManagementUnifiedProps {
  initialData?: Order[];
}

export function OrderManagementUnified({ initialData }: OrderManagementUnifiedProps) {
  const router = useRouter();

  // 달력 관련 상태 (beforeTableContent에서 사용하므로 config 외부에서 관리)
  const [selectedCalendarDate, setSelectedCalendarDate] = useState<Date | null>(null);
  const [calendarDate, setCalendarDate] = useState<Date>(new Date());
  const [siteFilters, setSiteFilters] = useState<string[]>([]);
  const [workTeamFilters, setWorkTeamFilters] = useState<string[]>([]);

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

  // 전체 데이터 (달력 이벤트용)
  const [allOrders, setAllOrders] = useState<Order[]>(initialData || []);
  const [isLoading, setIsLoading] = useState(false);

  // 필터 옵션들
  const siteOptions: MultiSelectOption[] = useMemo(() => MOCK_SITES, []);
  const workTeamOptions: MultiSelectOption[] = useMemo(() => MOCK_WORK_TEAM_LEADERS, []);
  const partnerOptions: MultiSelectOption[] = useMemo(() => MOCK_PARTNERS, []);
  const constructionPMOptions: MultiSelectOption[] = useMemo(() => MOCK_CONSTRUCTION_PM, []);
  const orderManagerOptions: MultiSelectOption[] = useMemo(() => MOCK_ORDER_MANAGERS, []);
  const orderCompanyOptions: MultiSelectOption[] = useMemo(() => MOCK_ORDER_COMPANIES, []);
  const orderTypeOptions: MultiSelectOption[] = useMemo(() => ORDER_TYPE_OPTIONS, []);

  // 데이터 로드
  const loadData = useCallback(async () => {
    setIsLoading(true);
    try {
      const result = await getOrderList({
        size: 1000,
        startDate: startDate || undefined,
        endDate: endDate || undefined,
      });

      if (result.success && result.data) {
        setAllOrders(result.data.items);
      }
    } catch {
      console.error('데이터 로드 실패');
    } finally {
      setIsLoading(false);
    }
  }, [startDate, endDate]);

  // 초기 데이터가 없으면 로드
  useEffect(() => {
    if (!initialData || initialData.length === 0) {
      loadData();
    }
  }, [initialData, loadData]);

  // 달력용 이벤트 데이터 변환 (필터 적용)
  const calendarEvents: ScheduleEvent[] = useMemo(() => {
    return allOrders
      .filter((order) => {
        // 현장 필터
        if (siteFilters.length > 0) {
          const matchingSite = MOCK_SITES.find((s) => order.siteName.includes(s.label.split(' ')[0]));
          if (!matchingSite || !siteFilters.includes(matchingSite.value)) {
            return false;
          }
        }

        // 작업반장 필터
        if (workTeamFilters.length > 0) {
          const matchingLeader = MOCK_WORK_TEAM_LEADERS.find((l) => order.orderManager.includes(l.label.replace('반장', '')));
          if (!matchingLeader || !workTeamFilters.includes(matchingLeader.value)) {
            return false;
          }
        }

        return true;
      })
      .map((order) => ({
        id: order.id,
        title: `${order.orderManager} - ${order.siteName} / ${order.orderNumber}`,
        startDate: order.periodStart,
        endDate: order.periodEnd,
        color: getScheduleColorByManager(order.orderManager),
        status: order.status,
        data: order,
      }));
  }, [allOrders, siteFilters, workTeamFilters]);

  // 달력용 뱃지 데이터 - 사용하지 않음
  const calendarBadges: DayBadge[] = [];

  // 달력 이벤트 핸들러
  const handleCalendarDateClick = useCallback((date: Date) => {
    if (selectedCalendarDate && isSameDay(selectedCalendarDate, date)) {
      setSelectedCalendarDate(null);
    } else {
      setSelectedCalendarDate(date);
    }
  }, [selectedCalendarDate]);

  const handleCalendarEventClick = useCallback((event: ScheduleEvent) => {
    if (event.data) {
      router.push(`/ko/construction/order/order-management/${event.id}`);
    }
  }, [router]);

  const handleCalendarMonthChange = useCallback((date: Date) => {
    setCalendarDate(date);
  }, []);

  // 날짜 포맷
  const formatDate = (dateStr: string | null) => {
    if (!dateStr) return '-';
    return dateStr.split('T')[0];
  };

  // 달력 필터 슬롯
  const calendarFilterSlot = (
    <div className="flex items-center gap-2">
      <MultiSelectCombobox
        options={siteOptions}
        value={siteFilters}
        onChange={setSiteFilters}
        placeholder="현장"
        searchPlaceholder="현장 검색..."
        className="w-[160px]"
      />
      <MultiSelectCombobox
        options={workTeamOptions}
        value={workTeamFilters}
        onChange={setWorkTeamFilters}
        placeholder="작업반장"
        searchPlaceholder="작업반장 검색..."
        className="w-[130px]"
      />
    </div>
  );

  // UniversalListPage Config 정의
  const config: UniversalListConfig<Order> = useMemo(() => ({
    // ===== 페이지 기본 정보 =====
    title: '발주관리',
    description: '발주 스케줄 및 목록을 관리합니다',
    icon: Package,
    basePath: '/construction/order/order-management',

    // ===== ID 추출 =====
    idField: 'id',

    // ===== API 액션 =====
    actions: {
      getList: async () => {
        const result = await getOrderList({
          size: 1000,
          startDate: startDate || undefined,
          endDate: endDate || undefined,
        });
        return {
          success: result.success,
          data: result.data?.items || [],
          totalCount: result.data?.items?.length || 0,
          error: result.error,
        };
      },
      deleteItem: async (id: string) => {
        return await deleteOrder(id);
      },
      deleteBulk: async (ids: string[]) => {
        return await deleteOrders(ids);
      },
    },

    // ===== 테이블 컬럼 =====
    columns: [
      { key: 'no', label: '번호', className: 'w-[50px] text-center' },
      { key: 'contractNumber', label: '계약번호', className: 'w-[100px]' },
      { key: 'partnerName', label: '거래처', className: 'w-[80px]' },
      { key: 'siteName', label: '현장명', className: 'min-w-[100px]' },
      { key: 'name', label: '명칭', className: 'w-[80px]' },
      { key: 'constructionPM', label: '공사PM', className: 'w-[70px]' },
      { key: 'orderManager', label: '발주담당자', className: 'w-[80px]' },
      { key: 'orderNumber', label: '발주번호', className: 'w-[100px]' },
      { key: 'orderCompany', label: '발주처명', className: 'w-[80px]' },
      { key: 'workTeamLeader', label: '작업반장', className: 'w-[70px]' },
      { key: 'constructionStartDate', label: '시공투입일', className: 'w-[90px]' },
      { key: 'orderType', label: '구분', className: 'w-[80px] text-center' },
      { key: 'item', label: '품목', className: 'w-[80px]' },
      { key: 'quantity', label: '수량', className: 'w-[60px] text-right' },
      { key: 'orderDate', label: '발주일', className: 'w-[90px]' },
      { key: 'plannedDeliveryDate', label: '계획인수일', className: 'w-[90px]' },
      { key: 'actualDeliveryDate', label: '실제인수일', className: 'w-[90px]' },
      { key: 'status', label: '상태', className: 'w-[80px] text-center' },
      { key: 'actions', label: '작업', className: 'w-[80px] text-center' },
    ],

    // ===== 클라이언트 사이드 필터링 =====
    clientSideFiltering: true,

    // 검색 필터 함수
    searchFilter: (item: Order, searchValue: string) => {
      const search = searchValue.toLowerCase();
      return (
        item.orderNumber.toLowerCase().includes(search) ||
        item.partnerName.toLowerCase().includes(search) ||
        item.siteName.toLowerCase().includes(search) ||
        item.orderManager.toLowerCase().includes(search)
      );
    },

    // ===== 필터 설정 =====
    filterConfig: [
      { key: 'partners', label: '거래처', type: 'multi', options: partnerOptions },
      { key: 'sites', label: '현장명', type: 'multi', options: siteOptions },
      { key: 'constructionPMs', label: '공사PM', type: 'multi', options: constructionPMOptions },
      { key: 'orderManagers', label: '발주담당자', type: 'multi', options: orderManagerOptions },
      { key: 'orderCompanies', label: '발주처', type: 'multi', options: orderCompanyOptions },
      { key: 'workTeamLeaders', label: '작업반장', type: 'multi', options: workTeamOptions },
      { key: 'orderTypes', label: '구분', type: 'multi', options: orderTypeOptions },
      { key: 'status', label: '상태', type: 'single', options: ORDER_STATUS_OPTIONS.filter(opt => opt.value !== 'all') },
      { key: 'sortBy', label: '정렬', type: 'single', options: ORDER_SORT_OPTIONS, allOptionLabel: '최신순' },
    ] as FilterFieldConfig[],

    // 커스텀 필터 적용 함수
    customFilterFn: (items: Order[], filterValues: Record<string, string | string[]>) => {
      return items.filter((order) => {
        // 거래처 필터
        const partners = filterValues.partners as string[] || [];
        if (partners.length > 0) {
          const matchingPartner = MOCK_PARTNERS.find((p) => p.label === order.partnerName);
          if (!matchingPartner || !partners.includes(matchingPartner.value)) {
            return false;
          }
        }

        // 현장명 필터
        const sites = filterValues.sites as string[] || [];
        if (sites.length > 0) {
          const matchingSite = MOCK_SITES.find((s) => s.label === order.siteName);
          if (!matchingSite || !sites.includes(matchingSite.value)) {
            return false;
          }
        }

        // 공사PM 필터
        const constructionPMs = filterValues.constructionPMs as string[] || [];
        if (constructionPMs.length > 0) {
          const matchingPM = MOCK_CONSTRUCTION_PM.find((p) => p.label === order.constructionPM);
          if (!matchingPM || !constructionPMs.includes(matchingPM.value)) {
            return false;
          }
        }

        // 발주담당자 필터
        const orderManagers = filterValues.orderManagers as string[] || [];
        if (orderManagers.length > 0) {
          const matchingManager = MOCK_ORDER_MANAGERS.find((m) => m.label === order.orderManager);
          if (!matchingManager || !orderManagers.includes(matchingManager.value)) {
            return false;
          }
        }

        // 발주처 필터
        const orderCompanies = filterValues.orderCompanies as string[] || [];
        if (orderCompanies.length > 0) {
          const matchingCompany = MOCK_ORDER_COMPANIES.find((c) => c.label === order.orderCompany);
          if (!matchingCompany || !orderCompanies.includes(matchingCompany.value)) {
            return false;
          }
        }

        // 작업반장 필터
        const workTeamLeaders = filterValues.workTeamLeaders as string[] || [];
        if (workTeamLeaders.length > 0) {
          const matchingLeader = MOCK_WORK_TEAM_LEADERS.find((l) => l.label === order.workTeamLeader);
          if (!matchingLeader || !workTeamLeaders.includes(matchingLeader.value)) {
            return false;
          }
        }

        // 구분 필터
        const orderTypes = filterValues.orderTypes as string[] || [];
        if (orderTypes.length > 0 && !orderTypes.includes(order.orderType)) {
          return false;
        }

        // 상태 필터
        const status = filterValues.status as string || 'all';
        if (status !== 'all' && order.status !== status) {
          return false;
        }

        // 달력 날짜 필터 (selectedCalendarDate)
        if (selectedCalendarDate) {
          const orderStart = startOfDay(parseISO(order.periodStart));
          const orderEnd = startOfDay(parseISO(order.periodEnd));
          const selected = startOfDay(selectedCalendarDate);

          if (selected < orderStart || selected > orderEnd) {
            return false;
          }
        }

        return true;
      });
    },

    // 커스텀 정렬 함수
    customSortFn: (items: Order[], filterValues: Record<string, string | string[]>) => {
      const sortBy = filterValues.sortBy as string || 'latest';
      const sorted = [...items];

      switch (sortBy) {
        case 'latest':
          sorted.sort((a, b) => new Date(b.createdAt).getTime() - new Date(a.createdAt).getTime());
          break;
        case 'oldest':
          sorted.sort((a, b) => new Date(a.createdAt).getTime() - new Date(b.createdAt).getTime());
          break;
        case 'partnerNameAsc':
          sorted.sort((a, b) => a.partnerName.localeCompare(b.partnerName, 'ko'));
          break;
        case 'partnerNameDesc':
          sorted.sort((a, b) => b.partnerName.localeCompare(a.partnerName, 'ko'));
          break;
        case 'siteNameAsc':
          sorted.sort((a, b) => a.siteName.localeCompare(b.siteName, 'ko'));
          break;
        case 'siteNameDesc':
          sorted.sort((a, b) => b.siteName.localeCompare(a.siteName, 'ko'));
          break;
        case 'deliveryDateAsc':
          sorted.sort((a, b) => a.plannedDeliveryDate.localeCompare(b.plannedDeliveryDate));
          break;
        case 'deliveryDateDesc':
          sorted.sort((a, b) => b.plannedDeliveryDate.localeCompare(a.plannedDeliveryDate));
          break;
      }

      return sorted;
    },

    // ===== 검색 설정 =====
    searchPlaceholder: '발주번호, 거래처, 현장명, 발주담당 검색',

    // ===== 상세 보기 모드 =====
    detailMode: 'page',

    // ===== 헤더 액션 =====
    headerActions: ({ onCreate }) => (
      <DateRangeSelector
        startDate={startDate}
        endDate={endDate}
        onStartDateChange={setStartDate}
        onEndDateChange={setEndDate}
        extraActions={
          <Button onClick={onCreate}>
            <Plus className="mr-2 h-4 w-4" />
            발주 등록
          </Button>
        }
      />
    ),

    // ===== 테이블 헤더 추가 액션 =====
    tableHeaderActions: (
      <div className="flex items-center gap-2 flex-wrap">
        {selectedCalendarDate && (
          <>
            <span className="text-sm text-primary">
              ({format(selectedCalendarDate, 'M/d')} 필터 적용중)
            </span>
            <Button
              variant="outline"
              size="sm"
              onClick={() => setSelectedCalendarDate(null)}
            >
              날짜 필터 해제
            </Button>
          </>
        )}
      </div>
    ),

    // ===== 삭제 확인 메시지 =====
    deleteConfirmMessage: {
      title: '발주 삭제',
      description: '선택한 발주를 삭제하시겠습니까? 이 작업은 되돌릴 수 없습니다.',
    },

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

      return (
        <TableRow
          key={item.id}
          className="cursor-pointer hover:bg-muted/50"
          onClick={() => onRowClick(item)}
        >
          <TableCell className="text-center" onClick={(e) => e.stopPropagation()}>
            <Checkbox
              checked={isSelected}
              onCheckedChange={onToggle}
            />
          </TableCell>
          <TableCell className="text-center text-muted-foreground">{globalIndex}</TableCell>
          <TableCell>{item.contractNumber}</TableCell>
          <TableCell>{item.partnerName}</TableCell>
          <TableCell>{item.siteName}</TableCell>
          <TableCell>{item.name}</TableCell>
          <TableCell>{item.constructionPM}</TableCell>
          <TableCell>{item.orderManager}</TableCell>
          <TableCell>{item.orderNumber}</TableCell>
          <TableCell>{item.orderCompany}</TableCell>
          <TableCell>{item.workTeamLeader}</TableCell>
          <TableCell>{formatDate(item.constructionStartDate)}</TableCell>
          <TableCell className="text-center">
            <span className="px-2 py-1 rounded-full text-xs font-medium bg-gray-100 text-gray-800">
              {ORDER_TYPE_LABELS[item.orderType]}
            </span>
          </TableCell>
          <TableCell>{item.item}</TableCell>
          <TableCell className="text-right">{item.quantity}</TableCell>
          <TableCell>{formatDate(item.orderDate)}</TableCell>
          <TableCell>{formatDate(item.plannedDeliveryDate)}</TableCell>
          <TableCell>{formatDate(item.actualDeliveryDate)}</TableCell>
          <TableCell className="text-center">
            <span className={`px-2 py-1 rounded-full text-xs font-medium ${ORDER_STATUS_STYLES[item.status]}`}>
              {ORDER_STATUS_LABELS[item.status]}
            </span>
          </TableCell>
          <TableCell className="text-center" onClick={(e) => e.stopPropagation()}>
            {isSelected && (
              <div className="flex items-center justify-center gap-1">
                <Button
                  variant="ghost"
                  size="icon"
                  className="h-8 w-8"
                  onClick={() => onEdit?.(item)}
                >
                  <Pencil className="h-4 w-4" />
                </Button>
                <Button
                  variant="ghost"
                  size="icon"
                  className="h-8 w-8 text-destructive hover:text-destructive"
                  onClick={() => onDelete?.(item)}
                >
                  <Trash2 className="h-4 w-4" />
                </Button>
              </div>
            )}
          </TableCell>
        </TableRow>
      );
    },

    // ===== 모바일 카드 렌더링 =====
    renderMobileCard: (
      item: Order,
      index: number,
      globalIndex: number,
      handlers: SelectionHandlers & RowClickHandlers<Order>
    ) => {
      const { isSelected, onToggle, onRowClick, onEdit, onDelete } = handlers;

      return (
        <ListMobileCard
          key={item.id}
          id={item.id}
          title={item.siteName}
          headerBadges={
            <div className="flex items-center gap-2 flex-wrap">
              <Badge variant="outline" className="text-xs">
                #{globalIndex}
              </Badge>
              <span className="text-xs text-muted-foreground">
                {item.orderNumber}
              </span>
            </div>
          }
          statusBadge={
            <Badge className={ORDER_STATUS_STYLES[item.status]}>
              {ORDER_STATUS_LABELS[item.status]}
            </Badge>
          }
          isSelected={isSelected}
          onToggleSelection={onToggle}
          onCardClick={() => onRowClick(item)}
          infoGrid={
            <div className="grid grid-cols-2 gap-x-4 gap-y-3">
              <InfoField label="거래처" value={item.partnerName} />
              <InfoField label="발주담당" value={item.orderManager} />
              <InfoField label="계획납품일" value={formatDate(item.plannedDeliveryDate)} />
              <InfoField label="구분" value={ORDER_TYPE_LABELS[item.orderType]} />
            </div>
          }
          actions={
            isSelected ? (
              <div className="flex gap-2 flex-wrap">
                <Button
                  variant="default"
                  size="default"
                  className="flex-1 min-w-[100px] h-11"
                  onClick={(e) => { e.stopPropagation(); onEdit?.(item); }}
                >
                  <Pencil className="h-4 w-4 mr-2" />
                  수정
                </Button>
                <Button
                  variant="outline"
                  size="default"
                  className="flex-1 min-w-[100px] h-11 border-red-200 text-red-600 hover:border-red-300 bg-transparent"
                  onClick={(e) => { e.stopPropagation(); onDelete?.(item); }}
                >
                  <Trash2 className="h-4 w-4 mr-2" />
                  삭제
                </Button>
              </div>
            ) : undefined
          }
        />
      );
    },

    // ===== 테이블 전 콘텐츠 (달력) =====
    beforeTableContent: (
      <div className="w-full flex-shrink-0 mb-6">
        <ScheduleCalendar
          events={calendarEvents}
          badges={calendarBadges}
          currentDate={calendarDate}
          selectedDate={selectedCalendarDate}
          onDateClick={handleCalendarDateClick}
          onEventClick={handleCalendarEventClick}
          onMonthChange={handleCalendarMonthChange}
          titleSlot="발주 스케줄"
          filterSlot={calendarFilterSlot}
          maxEventsPerDay={5}
          weekStartsOn={0}
          isLoading={isLoading}
        />
      </div>
    ),

    // ===== 추가 옵션 =====
    showCheckbox: true,
    showRowNumber: true,
    itemsPerPage: 20,
  }), [
    startDate,
    endDate,
    selectedCalendarDate,
    calendarDate,
    calendarEvents,
    calendarBadges,
    calendarFilterSlot,
    isLoading,
    handleCalendarDateClick,
    handleCalendarEventClick,
    handleCalendarMonthChange,
    partnerOptions,
    siteOptions,
    constructionPMOptions,
    orderManagerOptions,
    orderCompanyOptions,
    workTeamOptions,
    orderTypeOptions,
    router,
  ]);

  return (
    <UniversalListPage<Order>
      config={config}
      initialData={initialData}
    />
  );
}

export default OrderManagementUnified;