"use client";

import React, { useState, useEffect, useCallback, useRef } from 'react';
import { ScrollArea } from "@/components/ui/scroll-area";
import { Card, CardContent, CardHeader, CardTitle } from "@/components/ui/card";
import { Badge } from "@/components/ui/badge";
import { Button } from "@/components/ui/button";
import { Textarea } from "@/components/ui/textarea";
import { Input } from "@/components/ui/input";
import { toast } from "sonner";
import {
  FileText,
  MessageSquare,
  ChevronRight,
  ChevronDown,
  Search,
  AlertTriangle,
  CheckCircle2,
  Edit3,
  Save,
  X,
  Loader2,
  Hash,
  BookOpen,
  Minimize2,
  Maximize2,
} from "lucide-react";
import { cn, formatDateTime } from "@/lib/utils";
import {
  getVendorGtcData,
  updateVendorClause,
  checkVendorClausesCommentStatus,
  type GtcVendorData
} from "../service";
import { useSession } from "next-auth/react"

interface GtcClausesComponentProps {
  contractId?: number;
  onCommentStatusChange?: (
    hasComments: boolean, 
    commentCount: number, 
    reviewStatus?: string,
    isComplete?: boolean
  ) => void;
  t?: (key: string) => string;
}

// GTC 조항의 기본 타입 정의
type GtcVendorClause = {
  id: number;
  vendorClauseId: number | null;
  baseClauseId: number;
  vendorDocumentId: number | null;
  parentId: number | null;
  depth: number;
  sortOrder: string;
  fullPath: string | null;
  reviewStatus: string;
  negotiationNote: string | null;
  isExcluded: boolean;

  // 실제 표시될 값들 (기본 조항 값)
  effectiveItemNumber: string;
  effectiveCategory: string | null;
  effectiveSubtitle: string;
  effectiveContent: string | null;

  // 기본 조항 정보 (동일)
  baseItemNumber: string;
  baseCategory: string | null;
  baseSubtitle: string;
  baseContent: string | null;

  // 수정 여부 (코멘트만 있으면 false)
  hasModifications: boolean;
  isNumberModified: boolean;
  isCategoryModified: boolean;
  isSubtitleModified: boolean;
  isContentModified: boolean;

  // 코멘트 관련
  hasComment: boolean;
  pendingComment: string | null;
};

interface ClauseState extends GtcVendorClause {
  isExpanded?: boolean;
  isEditing?: boolean;
  tempComment?: string;
  isSaving?: boolean;
  uniqueId: number;
  commentHistory?: CommentHistory[]; // 추가
  showHistory?: boolean; // 이력 표시 여부
}

interface CommentHistory {
  vendorClauseId: number;
  comment: string;
  actorName?: string;
  actorEmail?: string;
  createdAt: Date;
  action: string;
}

export function GtcClausesComponent({
  contractId,
  onCommentStatusChange,
  t = (key: string) => key
}: GtcClausesComponentProps) {
  const [gtcData, setGtcData] = useState<GtcVendorData | null>(null);
  const [clauses, setClauses] = useState<ClauseState[]>([]);
  const [loading, setLoading] = useState(true);
  const [error, setError] = useState<string | null>(null);
  const [searchTerm, setSearchTerm] = useState("");
  const [expandedItems, setExpandedItems] = useState<Set<number>>(new Set());
  const [compactMode, setCompactMode] = useState(true); // 컴팩트 모드 상태 추가
  const { data: session } = useSession();

  const onCommentStatusChangeRef = useRef(onCommentStatusChange);
  onCommentStatusChangeRef.current = onCommentStatusChange;

  // 데이터 로드
  const loadGtcData = useCallback(async () => {
    try {
      setLoading(true);
      setError(null);

      const data = await getVendorGtcData(contractId);

      if (!data) {
        setError("GTC 데이터를 찾을 수 없습니다.");
        return;
      }

      setGtcData(data);

      const initialClauses: ClauseState[] = data.clauses.map(clause => ({
        ...clause,
        uniqueId: clause.id,
        isExpanded: false,
        isEditing: false,
        tempComment: clause.negotiationNote || "",
        isSaving: false,
      }));

      setClauses(initialClauses);

    } catch (err) {
      console.error('GTC 데이터 로드 실패:', err);
      setError(err instanceof Error ? err.message : 'GTC 데이터를 불러오는데 실패했습니다.');
    } finally {
      setLoading(false);
    }
  }, [contractId]);

  const lastCommentStatusRef = useRef<{ hasComments: boolean; commentCount: number , reviewStatus:string} | null>(null);

  // 코멘트 상태 변경을 별도 useEffect로 처리
  useEffect(() => {
    if (clauses.length > 0 && gtcData) {
      const commentCount = clauses.filter(c => c.hasComment).length;
      const hasComments = commentCount > 0;
      const reviewStatus = gtcData.vendorDocument?.reviewStatus || 'draft';
      
      // reviewStatus가 complete이면 코멘트가 있어도 완료된 것으로 처리
      const isComplete = reviewStatus === 'complete' || reviewStatus === 'approved';
      
      const currentStatus = { hasComments, commentCount, reviewStatus, isComplete };
      
      if (!lastCommentStatusRef.current || 
          lastCommentStatusRef.current.hasComments !== hasComments ||
          lastCommentStatusRef.current.commentCount !== commentCount ||
          lastCommentStatusRef.current.reviewStatus !== reviewStatus) {
        
        lastCommentStatusRef.current = currentStatus;
        // isComplete 정보도 전달
        onCommentStatusChangeRef.current?.(hasComments, commentCount, reviewStatus, isComplete);
      }
    }
  }, [clauses, gtcData]);


  useEffect(() => {
    loadGtcData();
  }, [loadGtcData]);

  // 검색 필터링
  const filteredClauses = React.useMemo(() => {
    if (!searchTerm.trim()) return clauses;

    const term = searchTerm.toLowerCase();
    return clauses.filter(clause =>
      clause.effectiveItemNumber.toLowerCase().includes(term) ||
      clause.effectiveSubtitle.toLowerCase().includes(term) ||
      clause.effectiveContent?.toLowerCase().includes(term) ||
      clause.negotiationNote?.toLowerCase().includes(term)
    );
  }, [clauses, searchTerm]);

  // 계층 구조로 조항 그룹화
  const groupedClauses = React.useMemo(() => {
    const grouped: { [key: number]: ClauseState[] } = { 0: [] }; // 최상위는 0

    filteredClauses.forEach(clause => {
      // parentId를 baseClauseId와 매핑 (parentId는 실제 baseClauseId를 가리킴)
      let parentKey = 0; // 기본값은 최상위

      if (clause.parentId !== null) {
        // parentId에 해당하는 조항을 찾아서 그 조항의 uniqueId를 사용
        const parentClause = filteredClauses.find(c => c.baseClauseId === clause.parentId);
        if (parentClause) {
          parentKey = parentClause.uniqueId;
        }
      }

      if (!grouped[parentKey]) {
        grouped[parentKey] = [];
      }
      grouped[parentKey].push(clause);
    });

    // 정렬
    Object.keys(grouped).forEach(key => {
      grouped[parseInt(key)].sort((a, b) => parseFloat(a.sortOrder) - parseFloat(b.sortOrder));
    });

    return grouped;
  }, [filteredClauses]);

  // 토글 확장/축소
  const toggleExpand = useCallback((uniqueId: number) => {
    setExpandedItems(prev => {
      const next = new Set(prev);
      if (next.has(uniqueId)) {
        next.delete(uniqueId);
      } else {
        next.add(uniqueId);
      }
      return next;
    });
  }, []);

  // 편집 모드 토글
  const toggleEdit = useCallback((uniqueId: number) => {
    setClauses(prev => prev.map(clause => {
      if (clause.uniqueId === uniqueId) {
        return {
          ...clause,
          isEditing: !clause.isEditing,
          tempComment:  "",
        };
      }
      return clause;
    }));
  }, []);

  // 임시 코멘트 업데이트
  const updateTempComment = useCallback((uniqueId: number, comment: string) => {
    setClauses(prev => prev.map(clause => {
      if (clause.uniqueId === uniqueId) {
        return { ...clause, tempComment: comment };
      }
      return clause;
    }));
  }, []);

  // toggleCommentHistory 함수 추가
  const toggleCommentHistory = useCallback((uniqueId: number) => {
    setClauses(prev => prev.map(clause => {
      if (clause.uniqueId === uniqueId) {
        return { ...clause, showHistory: !clause.showHistory };
      }
      return clause;
    }));
  }, []);

  // 코멘트 저장
  const saveComment = useCallback(async (uniqueId: number) => {
    const clause = clauses.find(c => c.uniqueId === uniqueId);
    if (!clause) return;

     // 빈 코멘트 체크 - 신규 입력 시에만
    if (!clause.hasComment && (!clause.tempComment || clause.tempComment.trim() === "")) {
      toast.error("코멘트를 입력해주세요.");
      return;
    }

    setClauses(prev => prev.map(c =>
      c.uniqueId === uniqueId ? { ...c, isSaving: true } : c
    ));

    try {
      const clauseData = {
        itemNumber: clause.effectiveItemNumber,
        category: clause.effectiveCategory,
        subtitle: clause.effectiveSubtitle,
        content: clause.effectiveContent,
        comment: clause.tempComment || "",
      };

      const result = await updateVendorClause(
        clause.id,
        clause.vendorClauseId,
        clauseData,
        gtcData?.vendorDocument
      );

      if (result.success) {

              if (!session?.user?.id) {
                toast.error("로그인이 필요합니다.");
                return;
              }

        // 새 코멘트를 이력에 추가
        const newHistory = {
          vendorClauseId: result.vendorClauseId,
          comment: clause.tempComment || "",
          actorName: session.user.name ||"현재 사용자", // 실제로는 세션에서 가져와야 함
          createdAt: new Date(),
          action: "commented"
        };

        setClauses(prev => prev.map(c => {
          if (c.uniqueId === uniqueId) {
            const updatedHistory = [newHistory, ...(c.commentHistory || [])];
            return {
              ...c,
              vendorClauseId: result.vendorClauseId || c.vendorClauseId,
              negotiationNote: clause.tempComment?.trim() || null,
              latestComment: clause.tempComment?.trim() || null,
              commentHistory: updatedHistory,
              hasComment: true,
              isEditing: false,
              isSaving: false,
            };
          }
          return c;
        }));

        toast.success("코멘트가 저장되었습니다.");
      } else {
        toast.error(result.error || "코멘트 저장에 실패했습니다.");
        setClauses(prev => prev.map(c =>
          c.uniqueId === uniqueId ? { ...c, isSaving: false } : c
        ));
      }
    } catch (error) {
      console.error('코멘트 저장 실패:', error);
      toast.error("코멘트 저장 중 오류가 발생했습니다.");
      setClauses(prev => prev.map(c =>
        c.uniqueId === uniqueId ? { ...c, isSaving: false } : c
      ));
    }
  }, [clauses, gtcData]);
  // 편집 취소
  const cancelEdit = useCallback((uniqueId: number) => {
    setClauses(prev => prev.map(clause => {
      if (clause.uniqueId === uniqueId) {
        return {
          ...clause,
          isEditing: false,
          tempComment: clause.negotiationNote || "",
        };
      }
      return clause;
    }));
  }, []);

  // 컴팩트 모드 렌더링
  const renderCompactClause = useCallback((clause: ClauseState, depth: number = 0): React.ReactNode => {
    const isExpanded = expandedItems.has(clause.uniqueId);
    const children = groupedClauses[clause.uniqueId] || [];
    const hasChildren = children.length > 0;

    return (
      <div key={clause.uniqueId} className={`${depth > 0 ? 'ml-4' : ''}`}>
        <div className={cn(
          "flex items-center justify-between p-2 rounded border transition-all duration-200 hover:bg-gray-50 mb-1",
          clause.hasComment && "border-amber-200 bg-amber-50",
          clause.isExcluded && "opacity-50 border-gray-300"
        )}>
          <div className="flex items-center space-x-2 flex-1 min-w-0">
            {/* 확장/축소 버튼 */}
            <Button
              variant="ghost"
              size="sm"
              className="h-5 w-5 p-0 flex-shrink-0"
              onClick={() => toggleExpand(clause.uniqueId)}
            >
              {isExpanded ? (
                <ChevronDown className="h-3 w-3" />
              ) : (
                <ChevronRight className="h-3 w-3" />
              )}
            </Button>

            {/* 조항 번호 */}
            <span className="font-mono text-blue-600 text-sm flex-shrink-0 min-w-0 font-medium">
              {clause.effectiveItemNumber}
            </span>

            {/* 제목 */}
            <span className="text-sm text-gray-800 truncate flex-1 min-w-0">
              {clause.effectiveSubtitle}
            </span>

            {/* 상태 표시 */}
            <div className="flex items-center space-x-1 flex-shrink-0">
              {/* {clause.hasComment && (
                <Badge variant="outline" className="text-xs px-1.5 py-0.5 h-5 bg-amber-50 text-amber-600 border-amber-200">
                  <MessageSquare className="h-2.5 w-2.5" />
                </Badge>
              )} */}
              {clause.isExcluded && (
                <Badge variant="outline" className="text-xs px-1.5 py-0.5 h-5 bg-gray-50 text-gray-500 border-gray-300">
                  제외
                </Badge>
              )}
            </div>
          </div>

          {/* 편집 버튼 */}
          <div className="flex items-center space-x-1 flex-shrink-0 ml-2">
            {clause.isEditing ? (
              <div className="flex items-center space-x-1">
                <Button
                  variant="ghost"
                  size="sm"
                  onClick={() => saveComment(clause.uniqueId)}
                  disabled={clause.isSaving}
                  className="h-6 w-6 p-0 text-green-600 hover:text-green-700 hover:bg-green-50"
                >
                  {clause.isSaving ? (
                    <Loader2 className="h-3 w-3 animate-spin" />
                  ) : (
                    <Save className="h-3 w-3" />
                  )}
                </Button>
                <Button
                  variant="ghost"
                  size="sm"
                  onClick={() => cancelEdit(clause.uniqueId)}
                  disabled={clause.isSaving}
                  className="h-6 w-6 p-0 text-gray-500 hover:text-gray-700 hover:bg-gray-50"
                >
                  <X className="h-3 w-3" />
                </Button>
              </div>
            ) : (
              <Button
                variant="ghost"
                size="sm"
                onClick={() => toggleEdit(clause.uniqueId)}
                className={cn(
                  "h-6 w-6 p-0 transition-colors",
                  clause.hasComment
                    ? "text-amber-600 hover:text-amber-700 hover:bg-amber-50"
                    : "text-gray-500 hover:text-gray-700 hover:bg-gray-50"
                )}
              >
                {clause.hasComment ? (
                  <MessageSquare className="h-3 w-3" />
                ) : (
                  <Edit3 className="h-3 w-3" />
                )}
              </Button>
            )}
          </div>
        </div>

        {/* 확장된 내용 */}
        {isExpanded && (
          <div className="mt-1 ml-5 p-3 bg-white rounded border border-gray-200">
            {/* 카테고리 */}
            {clause.effectiveCategory && (
              <div className="mb-2">
                <span className="text-sm text-gray-500 font-medium">카테고리: </span>
                <span className="text-sm text-gray-700">{clause.effectiveCategory}</span>
              </div>
            )}

            {/* 내용 */}
            {clause.effectiveContent && (
              <p className="text-sm text-gray-700 leading-relaxed mb-3 whitespace-pre-wrap">
                {clause.effectiveContent}
              </p>
            )}

            {/* 코멘트 편집 영역 */}
            {clause.isEditing && (
              <div className="mb-3 p-2.5 bg-amber-50 rounded border border-amber-200">
                <div className="flex items-center text-sm font-medium text-amber-800 mb-2">
                  <MessageSquare className="h-4 w-4 mr-2" />
                  협의 코멘트
                </div>
                <Textarea
                  value={clause.tempComment || ""}
                  onChange={(e) => updateTempComment(clause.uniqueId, e.target.value)}
                  placeholder="이 조항에 대한 의견이나 수정 요청 사항을 입력해주세요..."
                  className="min-h-[60px] text-sm bg-white border-amber-200 focus:border-amber-300"
                  disabled={clause.isSaving}
                />
                <p className="text-xs text-amber-600 mt-1">
                  코멘트를 입력하면 이 계약서는 서명할 수 없게 됩니다.
                </p>
              </div>
            )}

            {/* 기존 코멘트 표시 */}
            {!clause.isEditing && clause.hasComment && (
              <div className="mb-2 p-2.5 bg-amber-50 rounded border border-amber-200">
                <div className="flex items-center justify-between mb-2">
                  <div className="flex items-center text-sm font-medium text-amber-800">
                    <MessageSquare className="h-4 w-4 mr-2" />
                    협의 코멘트
                    {clause.commentHistory && clause.commentHistory.length > 1 && (
                      <Badge variant="outline" className="ml-2 text-xs">
                        {clause.commentHistory.length}개 이력
                      </Badge>
                    )}
                  </div>
                  {clause.commentHistory && clause.commentHistory.length > 1 && (
                    <Button
                      variant="ghost"
                      size="sm"
                      onClick={() => toggleCommentHistory(clause.uniqueId)}
                      className="h-6 px-2 text-xs text-amber-600 hover:text-amber-700"
                    >
                      {clause.showHistory ? "이력 숨기기" : "이력 보기"}
                    </Button>
                  )}
                </div>

                {/* 최신 코멘트 */}
                <div className="space-y-2">
                  <div className="bg-white p-2 rounded border border-amber-100">
                    <p className="text-sm text-amber-700 whitespace-pre-wrap">
                      {clause.latestComment || clause.negotiationNote}
                    </p>
                    {clause.commentHistory?.[0] && (
                      <div className="flex items-center justify-between mt-1 pt-1 border-t border-amber-100">
                        <span className="text-xs text-amber-600">
                          {clause.commentHistory[0].actorName || "SHI"}
                        </span>
                        <span className="text-xs text-amber-500">
                          {formatDateTime(clause.commentHistory[0].createdAt, "KR")}
                        </span>
                      </div>
                    )}
                  </div>

                  {/* 이전 코멘트 이력 */}
                  {clause.showHistory && clause.commentHistory && clause.commentHistory.length > 1 && (
                    <div className="space-y-1.5 max-h-60 overflow-y-auto">
                      {clause.commentHistory.slice(1).map((history, idx) => (
                        <div key={idx} className="bg-white/50 p-2 rounded border border-amber-100/50">
                          <p className="text-xs text-amber-600 whitespace-pre-wrap">
                            {history.comment}
                          </p>
                          <div className="flex items-center justify-between mt-1 pt-1 border-t border-amber-100/50">
                            <span className="text-xs text-amber-500">
                              {history.actorName || "SHI"}
                            </span>
                            <span className="text-xs text-amber-400">
                              {formatDateTime(history.createdAt, "KR")}
                            </span>
                          </div>
                        </div>
                      ))}
                    </div>
                  )}
                </div>
              </div>
            )}

          </div>
        )}

        {/* 자식 조항들 */}
        {hasChildren && (
          <div className={isExpanded ? "mt-1 border-l border-gray-200 pl-3" : ""}>
            {children.map(child => renderCompactClause(child, depth + 1))}
          </div>
        )}
      </div>
    );
  }, [expandedItems, groupedClauses, toggleExpand, saveComment, cancelEdit, toggleEdit, updateTempComment]);

  // 기본 모드 렌더링 (기존 코드 최적화)
  const renderNormalClause = useCallback((clause: ClauseState, depth: number = 0): React.ReactNode => {
    const isExpanded = expandedItems.has(clause.uniqueId);
    const children = groupedClauses[clause.uniqueId] || [];
    const hasChildren = children.length > 0;

    return (
      <div key={clause.uniqueId} className={`mb-1 ${depth > 0 ? 'ml-4' : ''}`}>
        <Card className={cn(
          "transition-all duration-200",
          clause.hasComment && "border-amber-200 bg-amber-50",
          clause.isExcluded && "opacity-50 border-gray-300"
        )}>
          <CardHeader className="pb-1 pt-2 px-3">
            <div className="flex items-start justify-between">
              <div className="flex items-start space-x-2 flex-1 min-w-0">
                {/* 확장/축소 버튼 */}
                <Button
                  variant="ghost"
                  size="sm"
                  className="h-5 w-5 p-0 flex-shrink-0"
                  onClick={() => toggleExpand(clause.uniqueId)}
                >
                  {isExpanded ? (
                    <ChevronDown className="h-3 w-3" />
                  ) : (
                    <ChevronRight className="h-3 w-3" />
                  )}
                </Button>

                <div className="flex-1 min-w-0">
                  <CardTitle className="text-sm font-medium text-gray-800 flex items-center">
                    <Hash className="h-3 w-3 mr-1 text-blue-500" />
                    {clause.effectiveItemNumber}
                    {clause.hasComment && (
                      <Badge variant="outline" className="ml-2 text-xs bg-amber-50 text-amber-700 border-amber-200">
                        <MessageSquare className="h-2 w-2 mr-1" />
                        코멘트
                      </Badge>
                    )}
                    {clause.isExcluded && (
                      <Badge variant="outline" className="ml-2 text-xs bg-gray-50 text-gray-500 border-gray-300">
                        제외됨
                      </Badge>
                    )}
                  </CardTitle>
                  <p className="text-sm font-medium text-gray-700 mt-0.5">
                    {clause.effectiveSubtitle}
                  </p>
                </div>

                {/* 코멘트 버튼 */}
                <div className="flex items-center space-x-0.5 flex-shrink-0">
                  {clause.isEditing ? (
                    <div className="flex items-center space-x-0.5">
                      <Button
                        variant="ghost"
                        size="sm"
                        onClick={() => saveComment(clause.uniqueId)}
                        disabled={clause.isSaving}
                        className="h-6 px-2 text-green-600 hover:text-green-700 hover:bg-green-50"
                      >
                        {clause.isSaving ? (
                          <Loader2 className="h-3 w-3 animate-spin" />
                        ) : (
                          <Save className="h-3 w-3" />
                        )}
                      </Button>
                      <Button
                        variant="ghost"
                        size="sm"
                        onClick={() => cancelEdit(clause.uniqueId)}
                        disabled={clause.isSaving}
                        className="h-6 px-2 text-gray-500 hover:text-gray-700 hover:bg-gray-50"
                      >
                        <X className="h-3 w-3" />
                      </Button>
                    </div>
                  ) : (
                    <Button
                      variant="ghost"
                      size="sm"
                      onClick={() => toggleEdit(clause.uniqueId)}
                      className={cn(
                        "h-6 px-2 transition-colors",
                        clause.hasComment
                          ? "text-amber-600 hover:text-amber-700 hover:bg-amber-50"
                          : "text-gray-500 hover:text-gray-700 hover:bg-gray-50"
                      )}
                    >
                      {clause.hasComment ? (
                        <MessageSquare className="h-3 w-3" />
                      ) : (
                        <Edit3 className="h-3 w-3" />
                      )}
                    </Button>
                  )}
                </div>
              </div>
            </div>
          </CardHeader>

          {isExpanded && (
            <CardContent className="pt-0 px-3 pb-2">
              {/* 카테고리 */}
              {clause.effectiveCategory && (
                <div className="mb-2">
                  <div className="flex items-center text-xs text-gray-500 mb-1">
                    <BookOpen className="h-3 w-3 mr-1" />
                    카테고리
                  </div>
                  <p className="text-sm text-gray-700 bg-gray-50 p-2 rounded">
                    {clause.effectiveCategory}
                  </p>
                </div>
              )}

              {/* 내용 */}
              {clause.effectiveContent && (
                <div className="mb-2">
                  <div className="flex items-center text-xs text-gray-500 mb-1">
                    <FileText className="h-3 w-3 mr-1" />
                    내용
                  </div>
                  <p className="text-sm text-gray-700 bg-gray-50 p-2 rounded whitespace-pre-wrap leading-tight">
                    {clause.effectiveContent}
                  </p>
                </div>
              )}

              {/* 코멘트 편집 영역 */}
              {clause.isEditing && (
                <div className="mb-2 p-2 bg-amber-50 rounded border border-amber-200">
                  <div className="flex items-center text-sm font-medium text-amber-800 mb-1">
                    <MessageSquare className="h-4 w-4 mr-2" />
                    협의 코멘트
                  </div>
                  <Textarea
                    value={clause.tempComment || ""}
                    onChange={(e) => updateTempComment(clause.uniqueId, e.target.value)}
                    placeholder="이 조항에 대한 의견이나 수정 요청 사항을 입력해주세요..."
                    className="min-h-[60px] text-sm bg-white border-amber-200 focus:border-amber-300"
                    disabled={clause.isSaving}
                  />
                  <p className="text-xs text-amber-600 mt-1">
                    코멘트를 입력하면 이 계약서는 서명할 수 없게 됩니다.
                  </p>
                </div>
              )}

              {/* 기존 코멘트 표시 */}
              {!clause.isEditing && clause.hasComment && clause.negotiationNote && (
                <div className="mb-2 p-2 bg-amber-50 rounded border border-amber-200">
                  <div className="flex items-center text-sm font-medium text-amber-800 mb-1">
                    <MessageSquare className="h-4 w-4 mr-2" />
                    협의 코멘트
                  </div>
                  <p className="text-sm text-amber-700 whitespace-pre-wrap">
                    {clause.negotiationNote}
                  </p>
                </div>
              )}

              {/* 자식 조항들 */}
              {hasChildren && (
                <div className="mt-2 border-l-2 border-gray-200 pl-2">
                  {children.map(child => renderNormalClause(child, depth + 1))}
                </div>
              )}
            </CardContent>
          )}
        </Card>

        {/* 확장되지 않았을 때 자식 조항들 */}
        {!isExpanded && hasChildren && (
          <div className="ml-4">
            {children.map(child => renderNormalClause(child, depth + 1))}
          </div>
        )}
      </div>
    );
  }, [expandedItems, groupedClauses, toggleExpand, saveComment, cancelEdit, toggleEdit, updateTempComment]);

  if (loading) {
    return (
      <div className="flex items-center justify-center h-64">
        <div className="text-center">
          <Loader2 className="h-8 w-8 text-blue-500 animate-spin mx-auto mb-4" />
          <p className="text-sm text-gray-500">GTC 조항을 불러오는 중...</p>
        </div>
      </div>
    );
  }

  if (error) {
    return (
      <div className="flex items-center justify-center h-64">
        <div className="text-center">
          <AlertTriangle className="h-8 w-8 text-red-500 mx-auto mb-4" />
          <p className="text-sm text-gray-700 font-medium mb-2">GTC 데이터 로드 실패</p>
          <p className="text-sm text-gray-500 mb-4">{error}</p>
          <Button onClick={loadGtcData} size="sm">
            다시 시도
          </Button>
        </div>
      </div>
    );
  }

  if (!gtcData) {
    return (
      <div className="flex items-center justify-center h-64">
        <div className="text-center">
          <FileText className="h-8 w-8 text-gray-400 mx-auto mb-4" />
          <p className="text-sm text-gray-500">GTC 데이터가 없습니다.</p>
        </div>
      </div>
    );
  }

  const totalComments = clauses.filter(c => c.hasComment).length;

  return (
    <div className="h-full flex flex-col">
      {/* 헤더 */}
      <div className={cn(
        "flex-shrink-0 border-b bg-gray-50",
        compactMode ? "p-2.5" : "p-3"
      )}>
        <div className={cn(
          "flex items-center justify-between",
          compactMode ? "mb-2" : "mb-2"
        )}>
          <div className="flex-1 min-w-0">
            <h3 className={cn(
              "font-semibold text-gray-800 flex items-center",
              compactMode ? "text-sm" : "text-base"
            )}>
              <FileText className={cn(
                "mr-2 text-blue-500",
                compactMode ? "h-4 w-4" : "h-5 w-5"
              )} />
              {gtcData.vendorDocument.name}
              
              {/* reviewStatus 배지 추가 */}
              {gtcData.vendorDocument.reviewStatus && (
                <Badge 
                  variant="outline" 
                  className={cn(
                    "ml-2",
                    gtcData.vendorDocument.reviewStatus === 'complete' || gtcData.vendorDocument.reviewStatus === 'approved'
                      ? "bg-green-50 text-green-700 border-green-200"
                      : gtcData.vendorDocument.reviewStatus === 'reviewing'
                      ? "bg-blue-50 text-blue-700 border-blue-200"
                      : "bg-gray-50 text-gray-700 border-gray-200"
                  )}
                >
                  {gtcData.vendorDocument.reviewStatus === 'complete' ? '협의 완료' :
                   gtcData.vendorDocument.reviewStatus === 'approved' ? '승인됨' :
                   gtcData.vendorDocument.reviewStatus === 'reviewing' ? '협의 중' :
                   gtcData.vendorDocument.reviewStatus === 'draft' ? '초안' :
                   gtcData.vendorDocument.reviewStatus}
                </Badge>
              )}
            </h3>
            {!compactMode && (
              <p className="text-sm text-gray-500 mt-0.5">
                {gtcData.vendorDocument.description || "GTC 조항 검토 및 협의"}
              </p>
            )}
          </div>
          <div className="flex items-center space-x-1.5">
            {/* 모드 전환 버튼 */}
            <Button
              variant="ghost"
              size="sm"
              onClick={() => setCompactMode(!compactMode)}
              className={cn(
                "transition-colors",
                compactMode ? "h-7 px-2" : "h-7 px-2"
              )}
              title={compactMode ? "일반 모드로 전환" : "컴팩트 모드로 전환"}
            >
              {compactMode ? (
                <Maximize2 className="h-3 w-3" />
              ) : (
                <Minimize2 className="h-3 w-3" />
              )}
            </Button>

            <Badge variant="outline" className={cn(
              "bg-blue-50 text-blue-700 border-blue-200",
              compactMode ? "text-xs px-1.5 py-0.5" : "text-xs"
            )}>
              총 {clauses.length}개 조항
            </Badge>
            {totalComments > 0 && (
              <Badge variant="outline" className={cn(
                "bg-amber-50 text-amber-700 border-amber-200",
                compactMode ? "text-xs px-1.5 py-0.5" : "text-xs"
              )}>
                <MessageSquare className={cn(
                  "mr-1",
                  compactMode ? "h-2.5 w-2.5" : "h-3 w-3"
                )} />
                {totalComments}개 코멘트
              </Badge>
            )}
          </div>
        </div>

        {/* 검색 */}
        <div className="relative">
          <div className="absolute inset-y-0 left-2 flex items-center pointer-events-none">
            <Search className={cn(
              "text-gray-400",
              compactMode ? "h-3.5 w-3.5" : "h-4 w-4"
            )} />
          </div>
          <Input
            placeholder={compactMode ? "조항 검색..." : "조항 번호, 제목, 내용, 코멘트로 검색..."}
            className={cn(
              "bg-white text-gray-700",
              compactMode ? "pl-8 text-sm h-8" : "pl-8 text-sm"
            )}
            value={searchTerm}
            onChange={(e) => setSearchTerm(e.target.value)}
          />
        </div>

        {/* 안내 메시지 수정 - reviewStatus 체크 */}
        {totalComments > 0 && gtcData.vendorDocument.reviewStatus !== 'complete' && gtcData.vendorDocument.reviewStatus !== 'approved' && (
          <div className={cn(
            "bg-amber-50 rounded border border-amber-200",
            compactMode ? "mt-2 p-2" : "mt-2 p-2"
          )}>
            <div className={cn(
              "flex items-center text-amber-800",
              compactMode ? "text-sm" : "text-sm"
            )}>
              <AlertTriangle className={cn(
                "mr-2",
                compactMode ? "h-4 w-4" : "h-4 w-4"
              )} />
              <span className="font-medium">코멘트가 있어 서명할 수 없습니다.</span>
            </div>
            {!compactMode && (
              <p className="text-sm text-amber-700 mt-0.5">
                모든 코멘트를 삭제하거나 협의를 완료한 후 서명해주세요.
              </p>
            )}
          </div>
        )}
        
        {/* 협의 완료 메시지 */}
        {totalComments > 0 && (gtcData.vendorDocument.reviewStatus === 'complete' || gtcData.vendorDocument.reviewStatus === 'approved') && (
          <div className={cn(
            "bg-green-50 rounded border border-green-200",
            compactMode ? "mt-2 p-2" : "mt-2 p-2"
          )}>
            <div className={cn(
              "flex items-center text-green-800",
              compactMode ? "text-sm" : "text-sm"
            )}>
              <CheckCircle2 className={cn(
                "mr-2",
                compactMode ? "h-4 w-4" : "h-4 w-4"
              )} />
              <span className="font-medium">협의가 완료되어 서명 가능합니다.</span>
            </div>
          </div>
        )}
      </div>

      {/* 조항 목록 */}
      <ScrollArea className="flex-1">
        <div className={compactMode ? "p-2.5" : "p-3"}>
          {filteredClauses.length === 0 ? (
            <div className="text-center py-6">
              <FileText className="h-6 w-6 text-gray-300 mx-auto mb-2" />
              <p className="text-sm text-gray-500">
                {searchTerm ? "검색 결과가 없습니다." : "조항이 없습니다."}
              </p>
            </div>
          ) : (
            <div className={compactMode ? "space-y-0.5" : "space-y-1"}>
              {(groupedClauses[0] || []).map(clause =>
                compactMode ? renderCompactClause(clause) : renderNormalClause(clause)
              )}
            </div>
          )}
        </div>
      </ScrollArea>
    </div>
  );
}