/**
 * 단가 목록 클라이언트 컴포넌트
 *
 * IntegratedListTemplateV2 공통 템플릿 활용
 */

'use client';

import { useState, useMemo } from 'react';
import { useRouter } from 'next/navigation';
import {
  DollarSign,
  Package,
  AlertCircle,
  CheckCircle2,
  Plus,
  Edit,
  History,
  RefreshCw,
} 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 {
  IntegratedListTemplateV2,
  type TabOption,
  type TableColumn,
  type StatCard,
} from '@/components/templates/IntegratedListTemplateV2';
import { ListMobileCard, InfoField } from '@/components/organisms/ListMobileCard';
import type { PricingListItem, ItemType } from './types';
import { ITEM_TYPE_LABELS, ITEM_TYPE_COLORS } from './types';

interface PricingListClientProps {
  initialData: PricingListItem[];
}

export function PricingListClient({
  initialData,
}: PricingListClientProps) {
  const router = useRouter();
  const [data] = useState<PricingListItem[]>(initialData);
  const [searchTerm, setSearchTerm] = useState('');
  const [activeTab, setActiveTab] = useState('all');
  const [selectedItems, setSelectedItems] = useState<Set<string>>(new Set());
  const [currentPage, setCurrentPage] = useState(1);
  const pageSize = 20;

  // 필터링된 데이터
  const filteredData = useMemo(() => {
    let result = [...data];

    // 탭 필터
    if (activeTab !== 'all') {
      result = result.filter(item => item.itemType === activeTab);
    }

    // 검색 필터
    if (searchTerm) {
      const search = searchTerm.toLowerCase();
      result = result.filter(item =>
        item.itemCode.toLowerCase().includes(search) ||
        item.itemName.toLowerCase().includes(search) ||
        (item.specification?.toLowerCase().includes(search) ?? false)
      );
    }

    return result;
  }, [data, activeTab, searchTerm]);

  // 페이지네이션된 데이터
  const paginatedData = useMemo(() => {
    const start = (currentPage - 1) * pageSize;
    return filteredData.slice(start, start + pageSize);
  }, [filteredData, currentPage, pageSize]);

  // 통계 계산
  const totalStats = useMemo(() => {
    const totalAll = data.length;
    const totalFG = data.filter(d => d.itemType === 'FG').length;
    const totalPT = data.filter(d => d.itemType === 'PT').length;
    const totalSM = data.filter(d => d.itemType === 'SM').length;
    const totalRM = data.filter(d => d.itemType === 'RM').length;
    const totalCS = data.filter(d => d.itemType === 'CS').length;
    const registered = data.filter(d => d.status !== 'not_registered').length;
    const notRegistered = totalAll - registered;
    const finalized = data.filter(d => d.isFinal).length;

    return { totalAll, totalFG, totalPT, totalSM, totalRM, totalCS, registered, notRegistered, finalized };
  }, [data]);

  // 금액 포맷팅
  const formatPrice = (price?: number) => {
    if (price === undefined || price === null) return '-';
    return `${price.toLocaleString()}원`;
  };

  // 품목 유형 Badge 렌더링
  const renderItemTypeBadge = (type: string) => {
    const colors = ITEM_TYPE_COLORS[type as ItemType];
    const label = ITEM_TYPE_LABELS[type as ItemType] || type;

    if (!colors) {
      return <Badge variant="outline">{label}</Badge>;
    }

    return (
      <Badge
        variant="outline"
        className={`${colors.bg} ${colors.text} ${colors.border}`}
      >
        {label}
      </Badge>
    );
  };

  // 상태 Badge 렌더링
  const renderStatusBadge = (item: PricingListItem) => {
    if (item.status === 'not_registered') {
      return <Badge variant="outline" className="bg-gray-50 text-gray-700">미등록</Badge>;
    }
    if (item.isFinal) {
      return <Badge variant="outline" className="bg-purple-50 text-purple-700 border-purple-200">확정</Badge>;
    }
    if (item.status === 'active') {
      return <Badge variant="outline" className="bg-green-50 text-green-700 border-green-200">활성</Badge>;
    }
    if (item.status === 'inactive') {
      return <Badge variant="outline" className="bg-red-50 text-red-700 border-red-200">비활성</Badge>;
    }
    return <Badge variant="outline" className="bg-blue-50 text-blue-700 border-blue-200">초안</Badge>;
  };

  // 마진율 Badge 렌더링
  const renderMarginBadge = (marginRate?: number) => {
    if (marginRate === undefined || marginRate === null || marginRate === 0) {
      return <span className="text-muted-foreground">-</span>;
    }

    const colorClass =
      marginRate >= 30 ? 'bg-green-50 text-green-700 border-green-200' :
      marginRate >= 20 ? 'bg-blue-50 text-blue-700 border-blue-200' :
      marginRate >= 10 ? 'bg-orange-50 text-orange-700 border-orange-200' :
      'bg-red-50 text-red-700 border-red-200';

    return (
      <Badge variant="outline" className={colorClass}>
        {marginRate.toFixed(1)}%
      </Badge>
    );
  };

  // 네비게이션 핸들러
  const handleRegister = (item: PricingListItem) => {
    // item_type_code는 품목 정보에서 자동으로 가져오므로 URL에 포함하지 않음
    router.push(`/sales/pricing-management/create?itemId=${item.itemId}&itemCode=${item.itemCode}`);
  };

  const handleEdit = (item: PricingListItem) => {
    router.push(`/sales/pricing-management/${item.id}/edit`);
  };

  const handleHistory = (item: PricingListItem) => {
    // TODO: 이력 다이얼로그 열기
    console.log('이력 조회:', item.id);
  };

  // 체크박스 전체 선택/해제
  const toggleSelectAll = () => {
    if (selectedItems.size === paginatedData.length && paginatedData.length > 0) {
      setSelectedItems(new Set());
    } else {
      const allIds = new Set(paginatedData.map((item) => item.id));
      setSelectedItems(allIds);
    }
  };

  // 개별 체크박스 선택/해제
  const toggleSelection = (itemId: string) => {
    const newSelected = new Set(selectedItems);
    if (newSelected.has(itemId)) {
      newSelected.delete(itemId);
    } else {
      newSelected.add(itemId);
    }
    setSelectedItems(newSelected);
  };

  // 탭 옵션
  const tabs: TabOption[] = [
    { value: 'all', label: '전체', count: totalStats.totalAll, color: 'gray' },
    { value: 'FG', label: '제품', count: totalStats.totalFG, color: 'purple' },
    { value: 'PT', label: '부품', count: totalStats.totalPT, color: 'orange' },
    { value: 'SM', label: '부자재', count: totalStats.totalSM, color: 'green' },
    { value: 'RM', label: '원자재', count: totalStats.totalRM, color: 'blue' },
    { value: 'CS', label: '소모품', count: totalStats.totalCS, color: 'gray' },
  ];

  // 통계 카드
  const stats: StatCard[] = [
    { label: '전체 품목', value: totalStats.totalAll, icon: Package, iconColor: 'text-blue-600' },
    { label: '단가 등록', value: totalStats.registered, icon: DollarSign, iconColor: 'text-green-600' },
    { label: '미등록', value: totalStats.notRegistered, icon: AlertCircle, iconColor: 'text-orange-600' },
    { label: '확정', value: totalStats.finalized, icon: CheckCircle2, iconColor: 'text-purple-600' },
  ];

  // 테이블 컬럼 정의
  const tableColumns: TableColumn[] = [
    { key: 'rowNumber', label: '번호', className: 'w-[60px] text-center' },
    { key: 'itemType', label: '품목유형', className: 'min-w-[100px]' },
    { key: 'itemCode', label: '품목코드', className: 'min-w-[120px]' },
    { key: 'itemName', label: '품목명', className: 'min-w-[150px]' },
    { key: 'specification', label: '규격', className: 'min-w-[100px]', hideOnMobile: true },
    { key: 'unit', label: '단위', className: 'min-w-[60px]', hideOnMobile: true },
    { key: 'purchasePrice', label: '매입단가', className: 'min-w-[100px] text-right', hideOnTablet: true },
    { key: 'processingCost', label: '가공비', className: 'min-w-[80px] text-right', hideOnTablet: true },
    { key: 'salesPrice', label: '판매단가', className: 'min-w-[100px] text-right' },
    { key: 'marginRate', label: '마진율', className: 'min-w-[80px] text-right', hideOnMobile: true },
    { key: 'effectiveDate', label: '적용일', className: 'min-w-[100px]', hideOnMobile: true },
    { key: 'status', label: '상태', className: 'min-w-[80px]' },
    { key: 'actions', label: '작업', className: 'w-[120px] text-right' },
  ];

  // 테이블 행 렌더링
  const renderTableRow = (item: PricingListItem, index: number, globalIndex: number) => {
    const isSelected = selectedItems.has(item.id);

    return (
      <TableRow key={item.id} className="hover:bg-muted/50">
        <TableCell className="text-center">
          <Checkbox
            checked={isSelected}
            onCheckedChange={() => toggleSelection(item.id)}
          />
        </TableCell>
        <TableCell className="text-muted-foreground text-center">
          {globalIndex}
        </TableCell>
        <TableCell>{renderItemTypeBadge(item.itemType)}</TableCell>
        <TableCell>
          <code className="text-xs bg-gray-100 px-2 py-1 rounded">
            {item.itemCode}
          </code>
        </TableCell>
        <TableCell>
          <span className="font-medium truncate max-w-[200px] block">
            {item.itemName}
          </span>
        </TableCell>
        <TableCell className="text-muted-foreground hidden md:table-cell">
          {item.specification || '-'}
        </TableCell>
        <TableCell className="hidden md:table-cell">
          <Badge variant="secondary">{item.unit || '-'}</Badge>
        </TableCell>
        <TableCell className="text-right font-mono hidden lg:table-cell">
          {formatPrice(item.purchasePrice)}
        </TableCell>
        <TableCell className="text-right font-mono hidden lg:table-cell">
          {formatPrice(item.processingCost)}
        </TableCell>
        <TableCell className="text-right font-mono font-semibold">
          {formatPrice(item.salesPrice)}
        </TableCell>
        <TableCell className="text-right hidden md:table-cell">
          {renderMarginBadge(item.marginRate)}
        </TableCell>
        <TableCell className="hidden md:table-cell">
          {item.effectiveDate
            ? new Date(item.effectiveDate).toLocaleDateString('ko-KR')
            : '-'}
        </TableCell>
        <TableCell>{renderStatusBadge(item)}</TableCell>
        <TableCell className="text-right">
          <div className="flex items-center justify-end gap-1">
            {item.status === 'not_registered' ? (
              <Button
                variant="ghost"
                size="sm"
                onClick={(e) => { e.stopPropagation(); handleRegister(item); }}
                title="단가 등록"
              >
                <Plus className="w-4 h-4" />
              </Button>
            ) : (
              <>
                <Button
                  variant="ghost"
                  size="sm"
                  onClick={(e) => { e.stopPropagation(); handleEdit(item); }}
                  title="수정"
                >
                  <Edit className="w-4 h-4" />
                </Button>
                {item.currentRevision > 0 && (
                  <Button
                    variant="ghost"
                    size="sm"
                    onClick={(e) => { e.stopPropagation(); handleHistory(item); }}
                    title="이력"
                  >
                    <History className="w-4 h-4" />
                  </Button>
                )}
              </>
            )}
          </div>
        </TableCell>
      </TableRow>
    );
  };

  // 모바일 카드 렌더링
  const renderMobileCard = (
    item: PricingListItem,
    index: number,
    globalIndex: number,
    isSelected: boolean,
    onToggle: () => void
  ) => {
    return (
      <ListMobileCard
        key={item.id}
        id={item.id}
        title={item.itemName}
        headerBadges={
          <div className="flex items-center gap-2 flex-wrap">
            <code className="text-xs bg-gray-100 px-2 py-1 rounded">
              {item.itemCode}
            </code>
            {renderItemTypeBadge(item.itemType)}
          </div>
        }
        statusBadge={renderStatusBadge(item)}
        isSelected={isSelected}
        onToggleSelection={onToggle}
        onCardClick={() => item.status !== 'not_registered' ? handleEdit(item) : handleRegister(item)}
        infoGrid={
          <div className="grid grid-cols-2 gap-x-4 gap-y-3">
            {item.specification && (
              <InfoField label="규격" value={item.specification} />
            )}
            {item.unit && (
              <InfoField label="단위" value={item.unit} />
            )}
            <InfoField label="판매단가" value={formatPrice(item.salesPrice)} />
            <InfoField
              label="마진율"
              value={item.marginRate ? `${item.marginRate.toFixed(1)}%` : '-'}
            />
          </div>
        }
        actions={
          isSelected ? (
            <div className="flex gap-2 flex-wrap">
              {item.status === 'not_registered' ? (
                <Button
                  variant="default"
                  size="default"
                  className="flex-1 min-w-[100px] h-11"
                  onClick={(e) => { e.stopPropagation(); handleRegister(item); }}
                >
                  <Plus className="h-4 w-4 mr-2" />
                  등록
                </Button>
              ) : (
                <>
                  <Button
                    variant="default"
                    size="default"
                    className="flex-1 min-w-[100px] h-11"
                    onClick={(e) => { e.stopPropagation(); handleEdit(item); }}
                  >
                    <Edit className="h-4 w-4 mr-2" />
                    수정
                  </Button>
                  {item.currentRevision > 0 && (
                    <Button
                      variant="outline"
                      size="default"
                      className="flex-1 min-w-[100px] h-11"
                      onClick={(e) => { e.stopPropagation(); handleHistory(item); }}
                    >
                      <History className="h-4 w-4 mr-2" />
                      이력
                    </Button>
                  )}
                </>
              )}
            </div>
          ) : undefined
        }
      />
    );
  };

  // 헤더 액션
  const headerActions = (
    <Button
      variant="outline"
      onClick={() => {
        // TODO: API 연동 시 품목 마스터 동기화 로직 구현
        console.log('품목 마스터 동기화');
      }}
      className="ml-auto gap-2"
    >
      <RefreshCw className="h-4 w-4" />
      품목 마스터 동기화
    </Button>
  );

  // 페이지네이션
  const totalPages = Math.ceil(filteredData.length / pageSize);

  return (
    <IntegratedListTemplateV2<PricingListItem>
      title="단가 목록"
      description="품목별 매입단가, 판매단가 및 마진을 관리합니다"
      icon={DollarSign}
      headerActions={headerActions}
      stats={stats}
      searchValue={searchTerm}
      onSearchChange={setSearchTerm}
      searchPlaceholder="품목코드, 품목명, 규격 검색..."
      tabs={tabs}
      activeTab={activeTab}
      onTabChange={setActiveTab}
      tableColumns={tableColumns}
      data={paginatedData}
      totalCount={filteredData.length}
      allData={filteredData}
      selectedItems={selectedItems}
      onToggleSelection={toggleSelection}
      onToggleSelectAll={toggleSelectAll}
      getItemId={(item) => item.id}
      renderTableRow={renderTableRow}
      renderMobileCard={renderMobileCard}
      pagination={{
        currentPage,
        totalPages,
        totalItems: filteredData.length,
        itemsPerPage: pageSize,
        onPageChange: setCurrentPage,
      }}
    />
  );
}

export default PricingListClient;