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path: root/app/[lng]/evcp/(evcp)/(eng)/swp-document-upload/swp-document-page.tsx
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"use client";

import { useState, useEffect, useTransition } from "react";
import { useRouter, useSearchParams } from "next/navigation";
import { Card, CardContent, CardDescription, CardHeader, CardTitle } from "@/components/ui/card";
import { Alert, AlertDescription } from "@/components/ui/alert";
import { Skeleton } from "@/components/ui/skeleton";
import { InfoIcon } from "lucide-react";
import { SwpTable } from "@/lib/swp/table/swp-table";
import { SwpTableToolbar } from "@/lib/swp/table/swp-table-toolbar";
import {
  fetchSwpDocuments,
  fetchProjectList,
  fetchSwpStats,
  type SwpTableFilters,
  type SwpDocumentWithStats,
} from "@/lib/swp/actions";

interface SwpDocumentPageProps {
  searchParams: { [key: string]: string | string[] | undefined };
}

export default function SwpDocumentPage({ searchParams }: SwpDocumentPageProps) {
  const router = useRouter();
  const params = useSearchParams();
  const [isPending, startTransition] = useTransition();

  // URL에서 필터 파라미터 추출
  const initialFilters: SwpTableFilters = {
    projNo: (searchParams.projNo as string) || "",
    docNo: (searchParams.docNo as string) || "",
    docTitle: (searchParams.docTitle as string) || "",
    pkgNo: (searchParams.pkgNo as string) || "",
    vndrCd: (searchParams.vndrCd as string) || "",
    stage: (searchParams.stage as string) || "",
  };

  const initialPage = parseInt((searchParams.page as string) || "1", 10);
  const initialPageSize = parseInt((searchParams.pageSize as string) || "100", 10);

  // 상태 관리
  const [documents, setDocuments] = useState<SwpDocumentWithStats[]>([]);
  const [total, setTotal] = useState(0);
  const [page, setPage] = useState(initialPage);
  const [pageSize] = useState(initialPageSize);
  const [totalPages, setTotalPages] = useState(0);
  const [filters, setFilters] = useState<SwpTableFilters>(initialFilters);
  const [projects, setProjects] = useState<Array<{ PROJ_NO: string; PROJ_NM: string }>>([]);
  const [stats, setStats] = useState({
    total_documents: 0,
    total_revisions: 0,
    total_files: 0,
    last_sync: null as Date | null,
  });
  const [isLoading, setIsLoading] = useState(true);
  const [error, setError] = useState<string | null>(null);

  // 초기 데이터 로드
  useEffect(() => {
    loadInitialData();
  }, []);

  // 필터 변경 시 데이터 재로드
  useEffect(() => {
    if (!isLoading) {
      loadDocuments();
    }
  }, [filters, page]);

  const loadInitialData = async () => {
    try {
      setIsLoading(true);
      setError(null);

      // 병렬로 데이터 로드
      const [projectsData, statsData, documentsData] = await Promise.all([
        fetchProjectList(),
        fetchSwpStats(),
        fetchSwpDocuments({
          page,
          pageSize,
          filters: Object.keys(initialFilters).length > 0 ? initialFilters : undefined,
        }),
      ]);

      setProjects(projectsData);
      setStats(statsData);
      setDocuments(documentsData.data);
      setTotal(documentsData.total);
      setTotalPages(documentsData.totalPages);
    } catch (err) {
      console.error("초기 데이터 로드 실패:", err);
      setError(err instanceof Error ? err.message : "데이터 로드 실패");
    } finally {
      setIsLoading(false);
    }
  };

  const loadDocuments = async () => {
    startTransition(async () => {
      try {
        const data = await fetchSwpDocuments({
          page,
          pageSize,
          filters: Object.keys(filters).some((key) => filters[key as keyof SwpTableFilters])
            ? filters
            : undefined,
        });

        setDocuments(data.data);
        setTotal(data.total);
        setTotalPages(data.totalPages);

        // URL 업데이트
        const params = new URLSearchParams();
        if (filters.projNo) params.set("projNo", filters.projNo);
        if (filters.docNo) params.set("docNo", filters.docNo);
        if (filters.docTitle) params.set("docTitle", filters.docTitle);
        if (filters.pkgNo) params.set("pkgNo", filters.pkgNo);
        if (filters.vndrCd) params.set("vndrCd", filters.vndrCd);
        if (filters.stage) params.set("stage", filters.stage);
        if (page !== 1) params.set("page", page.toString());

        router.push(`?${params.toString()}`, { scroll: false });
      } catch (err) {
        console.error("문서 로드 실패:", err);
        setError(err instanceof Error ? err.message : "문서 로드 실패");
      }
    });
  };

  const handleFiltersChange = (newFilters: SwpTableFilters) => {
    setFilters(newFilters);
    setPage(1); // 필터 변경 시 첫 페이지로
  };

  const handlePageChange = (newPage: number) => {
    setPage(newPage);
  };

  if (isLoading) {
    return (
      <Card>
        <CardHeader>
          <Skeleton className="h-8 w-48" />
          <Skeleton className="h-4 w-96" />
        </CardHeader>
        <CardContent className="space-y-4">
          <Skeleton className="h-32 w-full" />
          <Skeleton className="h-96 w-full" />
        </CardContent>
      </Card>
    );
  }

  if (error) {
    return (
      <Alert variant="destructive">
        <AlertDescription>{error}</AlertDescription>
      </Alert>
    );
  }

  return (
    <div className="space-y-6">
      {/* 통계 카드 */}
      <div className="grid grid-cols-1 md:grid-cols-4 gap-4">
        <Card>
          <CardHeader className="pb-3">
            <CardDescription>총 문서</CardDescription>
            <CardTitle className="text-3xl">{stats.total_documents.toLocaleString()}</CardTitle>
          </CardHeader>
        </Card>
        <Card>
          <CardHeader className="pb-3">
            <CardDescription>총 리비전</CardDescription>
            <CardTitle className="text-3xl">{stats.total_revisions.toLocaleString()}</CardTitle>
          </CardHeader>
        </Card>
        <Card>
          <CardHeader className="pb-3">
            <CardDescription>총 파일</CardDescription>
            <CardTitle className="text-3xl">{stats.total_files.toLocaleString()}</CardTitle>
          </CardHeader>
        </Card>
        <Card>
          <CardHeader className="pb-3">
            <CardDescription>마지막 동기화</CardDescription>
            <CardTitle className="text-lg">
              {stats.last_sync
                ? new Date(stats.last_sync).toLocaleDateString("ko-KR")
                : "없음"}
            </CardTitle>
          </CardHeader>
        </Card>
      </div>

      {/* 안내 메시지 */}
      {documents.length === 0 && !filters.projNo && (
        <Alert>
          <InfoIcon className="h-4 w-4" />
          <AlertDescription>
            시작하려면 프로젝트를 선택하고 <strong>SWP 동기화</strong> 버튼을 클릭하세요.
          </AlertDescription>
        </Alert>
      )}

      {/* 메인 테이블 */}
      <Card>
        <CardHeader>
          <SwpTableToolbar
            filters={filters}
            onFiltersChange={handleFiltersChange}
            projects={projects}
          />
        </CardHeader>
        <CardContent>
          <SwpTable
            initialData={documents}
            total={total}
            page={page}
            pageSize={pageSize}
            totalPages={totalPages}
            onPageChange={handlePageChange}
          />
        </CardContent>
      </Card>
    </div>
  );
}