"use client";

import React, { useState, useEffect } from "react";
import {
  Dialog,
  DialogContent,
  DialogHeader,
  DialogTitle,
  DialogDescription,
} from "@/components/ui/dialog";
import { Button } from "@/components/ui/button";
import { Badge } from "@/components/ui/badge";
import { 
  Loader2, 
  ChevronDown, 
  ChevronRight, 
  Download, 
  FileIcon,
  XCircle,
  AlertCircle,
} from "lucide-react";
import { 
  fetchVendorDocumentDetail,
  cancelVendorFile,
  downloadVendorFile,
} from "@/lib/swp/vendor-actions";
import type { DocumentListItem, DocumentDetail } from "@/lib/swp/document-service";
import { toast } from "sonner";

interface SwpDocumentDetailDialogProps {
  open: boolean;
  onOpenChange: (open: boolean) => void;
  document: DocumentListItem | null;
  projNo: string;
  vendorCode: string;
  userId: string;
}

export function SwpDocumentDetailDialog({
  open,
  onOpenChange,
  document,
  projNo,
}: SwpDocumentDetailDialogProps) {
  const [detail, setDetail] = useState<DocumentDetail | null>(null);
  const [isLoading, setIsLoading] = useState(false);
  const [expandedRevisions, setExpandedRevisions] = useState<Set<string>>(new Set());
  const [expandedActivities, setExpandedActivities] = useState<Set<string>>(new Set());
  const [isAllExpanded, setIsAllExpanded] = useState(true); // 기본값 true

  // 문서 상세 로드
  useEffect(() => {
    if (open && document) {
      loadDocumentDetail();
    }
    // eslint-disable-next-line react-hooks/exhaustive-deps
  }, [open, document?.DOC_NO]);

  const loadDocumentDetail = async () => {
    if (!document) return;

    setIsLoading(true);
    try {
      const detailData = await fetchVendorDocumentDetail(projNo, document.DOC_NO);
      setDetail(detailData);
      
      // 모든 리비전 자동 펼치기
      const allRevKeys = new Set<string>();
      const allActKeys = new Set<string>();
      
      detailData.revisions.forEach((revision) => {
        const revKey = `${revision.revNo}|${revision.revSeq}`;
        allRevKeys.add(revKey);
        
        // 모든 액티비티도 자동 펼치기
        revision.activities.forEach((activity) => {
          const actKey = `${revKey}|${activity.actvNo}`;
          allActKeys.add(actKey);
        });
      });
      
      setExpandedRevisions(allRevKeys);
      setExpandedActivities(allActKeys);
      setIsAllExpanded(true);
    } catch (error) {
      console.error("문서 상세 조회 실패:", error);
      toast.error("문서 상세 정보를 불러오는데 실패했습니다");
    } finally {
      setIsLoading(false);
    }
  };

  const toggleRevision = (revKey: string) => {
    setExpandedRevisions((prev) => {
      const newSet = new Set(prev);
      if (newSet.has(revKey)) {
        newSet.delete(revKey);
      } else {
        newSet.add(revKey);
      }
      return newSet;
    });
  };

  const toggleActivity = (actKey: string) => {
    setExpandedActivities((prev) => {
      const newSet = new Set(prev);
      if (newSet.has(actKey)) {
        newSet.delete(actKey);
      } else {
        newSet.add(actKey);
      }
      return newSet;
    });
  };

  // 일괄 열기/닫기
  const handleToggleAll = () => {
    if (!detail) return;

    if (isAllExpanded) {
      // 모두 닫기
      setExpandedRevisions(new Set());
      setExpandedActivities(new Set());
      setIsAllExpanded(false);
    } else {
      // 모두 열기
      const allRevKeys = new Set<string>();
      const allActKeys = new Set<string>();
      
      detail.revisions.forEach((revision) => {
        const revKey = `${revision.revNo}|${revision.revSeq}`;
        allRevKeys.add(revKey);
        
        revision.activities.forEach((activity) => {
          const actKey = `${revKey}|${activity.actvNo}`;
          allActKeys.add(actKey);
        });
      });
      
      setExpandedRevisions(allRevKeys);
      setExpandedActivities(allActKeys);
      setIsAllExpanded(true);
    }
  };

  const handleCancelFile = async (boxSeq: string, actvSeq: string, fileName: string) => {
    try {
      await cancelVendorFile(boxSeq, actvSeq);
      toast.success(`파일 취소 완료: ${fileName}`);
      
      // 문서 상세 재로드
      await loadDocumentDetail();
    } catch (error) {
      console.error("파일 취소 실패:", error);
      toast.error("파일 취소에 실패했습니다");
    }
  };

  const handleDownloadFile = async (fileName: string, ownDocNo: string) => {
    try {
      toast.info("파일 다운로드 중...");
      const result = await downloadVendorFile(projNo, ownDocNo, fileName);
      
      if (!result.success || !result.data) {
        toast.error(result.error || "파일 다운로드 실패");
        return;
      }

      // Blob 생성 및 다운로드
      const blob = new Blob([Buffer.from(result.data)], { type: result.mimeType });
      const url = URL.createObjectURL(blob);
      const link = window.document.createElement("a");
      link.href = url;
      link.download = result.fileName || fileName;
      window.document.body.appendChild(link);
      link.click();
      window.document.body.removeChild(link);
      URL.revokeObjectURL(url);

      toast.success(`파일 다운로드 완료: ${fileName}`);
    } catch (error) {
      console.error("파일 다운로드 실패:", error);
      toast.error("파일 다운로드에 실패했습니다");
    }
  };

  return (
    <Dialog open={open} onOpenChange={onOpenChange}>
      <DialogContent className="max-w-6xl max-h-[90vh] overflow-y-auto">
        <DialogHeader>
          <DialogTitle>문서 상세</DialogTitle>
          {document && (
            <DialogDescription>
              {document.DOC_NO} - {document.DOC_TITLE}
            </DialogDescription>
          )}
        </DialogHeader>

        {document && (
          <div className="space-y-4">
            {/* 문서 정보 */}
            <div className="grid grid-cols-1 md:grid-cols-4 gap-4 p-4 bg-muted/30 rounded-lg">
              <div>
                <span className="text-sm font-semibold">프로젝트:</span>
                <div className="text-sm">{document.PROJ_NO}</div>
                {document.PROJ_NM && (
                  <div className="text-xs text-muted-foreground">{document.PROJ_NM}</div>
                )}
              </div>
              <div>
                <span className="text-sm font-semibold">패키지:</span>
                <div className="text-sm">{document.PKG_NO || "-"}</div>
              </div>
              <div>
                <span className="text-sm font-semibold">업체:</span>
                <div className="text-sm">{document.CPY_NM || "-"}</div>
                {document.VNDR_CD && (
                  <div className="text-xs text-muted-foreground">{document.VNDR_CD}</div>
                )}
              </div>
              <div>
                <span className="text-sm font-semibold">최신 리비전:</span>
                <div className="text-sm">{document.LTST_REV_NO || "-"}</div>
              </div>
            </div>

            {/* 리비전 및 액티비티 트리 */}
            {isLoading ? (
              <div className="flex items-center justify-center p-8">
                <Loader2 className="h-6 w-6 animate-spin" />
                <span className="ml-2">문서 상세 로딩 중...</span>
              </div>
            ) : detail && detail.revisions.length > 0 ? (
              <div className="space-y-2">
                {/* 일괄 열기/닫기 버튼 */}
                <div className="flex justify-end">
                  <Button
                    variant="outline"
                    size="sm"
                    onClick={handleToggleAll}
                  >
                    {isAllExpanded ? (
                      <>
                        <ChevronDown className="h-4 w-4 mr-2" />
                        일괄 닫기
                      </>
                    ) : (
                      <>
                        <ChevronRight className="h-4 w-4 mr-2" />
                        일괄 열기
                      </>
                    )}
                  </Button>
                </div>
                {detail.revisions.map((revision) => {
                  const revKey = `${revision.revNo}|${revision.revSeq}`;
                  const isRevExpanded = expandedRevisions.has(revKey);

                  return (
                    <div key={revKey} className="border rounded-lg">
                      {/* 리비전 헤더 */}
                      <div
                        className="flex items-center justify-between p-3 bg-muted/50 cursor-pointer hover:bg-muted"
                        onClick={() => toggleRevision(revKey)}
                      >
                        <div className="flex items-center gap-3">
                          {isRevExpanded ? (
                            <ChevronDown className="h-4 w-4" />
                          ) : (
                            <ChevronRight className="h-4 w-4" />
                          )}
                          <Badge variant="secondary" className="font-mono">
                            REV {revision.revNo}
                          </Badge>
                          <Badge variant="outline" className={
                            revision.stage === "IFC" ? "bg-green-100 text-green-800" :
                            revision.stage === "IFA" ? "bg-blue-100 text-blue-800" :
                            "bg-gray-100 text-gray-800"
                          }>
                            {revision.stage}
                          </Badge>
                          <span className="text-sm text-muted-foreground">
                            {revision.activities.length}개 액티비티 / {revision.totalFiles}개 파일
                          </span>
                        </div>
                      </div>

                      {/* 액티비티 목록 */}
                      {isRevExpanded && (
                        <div className="p-2 space-y-2">
                          {revision.activities.map((activity) => {
                            const actKey = `${revKey}|${activity.actvNo}`;
                            const isActExpanded = expandedActivities.has(actKey);
                            
                            // Activity 타입에 따른 색상
                            const activityColor =
                              activity.type === "Receive" ? "bg-blue-100 text-blue-800" :
                              activity.type === "Send" ? "bg-green-100 text-green-800" :
                              "bg-purple-100 text-purple-800";

                            return (
                              <div key={actKey} className="border rounded-md">
                                {/* 액티비티 헤더 */}
                                <div
                                  className="flex items-center justify-between p-2 bg-muted/30 cursor-pointer hover:bg-muted/50"
                                  onClick={() => toggleActivity(actKey)}
                                >
                                  <div className="flex items-center gap-2">
                                    {isActExpanded ? (
                                      <ChevronDown className="h-4 w-4" />
                                    ) : (
                                      <ChevronRight className="h-4 w-4" />
                                    )}
                                    <Badge variant="outline" className={activityColor}>
                                      {activity.type}
                                    </Badge>
                                    <span className="text-xs text-muted-foreground font-mono">
                                      {activity.actvNo}
                                    </span>
                                    <span className="text-sm text-muted-foreground">
                                      {activity.toFrom}
                                    </span>
                                    <span className="text-xs text-muted-foreground">
                                      {activity.files.length}개 파일
                                    </span>
                                  </div>
                                </div>

                                {/* 파일 목록 */}
                                {isActExpanded && (
                                  <div className="p-2 space-y-1">
                                    {activity.files.map((file, idx) => (
                                      <div
                                        key={idx}
                                        className="flex items-center justify-between p-2 border rounded bg-background hover:bg-muted/30"
                                      >
                                        <div className="flex items-center gap-2 flex-1">
                                          <FileIcon className="h-4 w-4 text-blue-500" />
                                          <span className="text-sm font-mono">{file.fileNm}</span>
                                          {file.fileSz && (
                                            <span className="text-xs text-muted-foreground">
                                              ({formatFileSize(file.fileSz)})
                                            </span>
                                          )}
                                          {file.stat && (
                                            <Badge variant="outline" className={
                                              file.stat === "SCW01" ? "bg-yellow-100 text-yellow-800" :
                                              file.stat === "SCW03" ? "bg-green-100 text-green-800" :
                                              file.stat === "SCW09" ? "bg-gray-100 text-gray-800" :
                                              "bg-gray-100 text-gray-800"
                                            }>
                                              {file.statNm || file.stat}
                                            </Badge>
                                          )}
                                        </div>
                                        <div className="flex items-center gap-1">
                                          {file.canCancel && file.boxSeq && file.actvSeq && (
                                            <Button
                                              variant="outline"
                                              size="sm"
                                              onClick={() => handleCancelFile(file.boxSeq!, file.actvSeq!, file.fileNm)}
                                            >
                                              <XCircle className="h-4 w-4 mr-1" />
                                              취소
                                            </Button>
                                          )}
                                          <Button
                                            variant="outline"
                                            size="sm"
                                            onClick={() => handleDownloadFile(file.fileNm, document.DOC_NO)}
                                          >
                                            <Download className="h-4 w-4 mr-1" />
                                            다운로드
                                          </Button>
                                        </div>
                                      </div>
                                    ))}
                                  </div>
                                )}
                              </div>
                            );
                          })}
                        </div>
                      )}
                    </div>
                  );
                })}
              </div>
            ) : (
              <div className="p-8 text-center text-muted-foreground">
                <AlertCircle className="h-12 w-12 mx-auto mb-2 opacity-50" />
                <p>리비전 정보가 없습니다</p>
              </div>
            )}
          </div>
        )}
      </DialogContent>
    </Dialog>
  );
}

function formatFileSize(sizeStr: string): string {
  const bytes = parseInt(sizeStr, 10);
  if (isNaN(bytes)) return sizeStr;

  const kb = bytes / 1024;
  const mb = kb / 1024;

  return mb >= 1 ? `${mb.toFixed(2)} MB` : `${kb.toFixed(2)} KB`;
}