"use client"

import * as React from "react"
import { ColumnDef } from "@tanstack/react-table"
import type { Row } from "@tanstack/react-table"
import { ClientDataTableColumnHeaderSimple } from "@/components/client-data-table/data-table-column-simple-header"
import { formatDateTime } from "@/lib/utils"
import { Badge } from "@/components/ui/badge"
import { Button } from "@/components/ui/button"
import {
  DropdownMenu,
  DropdownMenuContent,
  DropdownMenuItem,
  DropdownMenuSeparator,
  DropdownMenuTrigger,
} from "@/components/ui/dropdown-menu"
import {
  FileText,
  Upload,
  CheckCircle,
  Clock,
  AlertTriangle,
  FileX,
  Download,
  AlertCircle,
  RefreshCw,
  Calendar,
  MessageSquare,
  GitBranch,
  Ellipsis
} from "lucide-react"
import { cn } from "@/lib/utils"
import type { EnhancedVendorResponse } from "@/lib/b-rfq/service"
import { UploadResponseDialog } from "./upload-response-dialog"
import { CommentEditDialog } from "./comment-edit-dialog"
import { WaiveResponseDialog } from "./waive-response-dialog"
import { ResponseDetailSheet } from "./response-detail-sheet"

export interface DataTableRowAction<TData> {
  row: Row<TData>
  type: 'upload' | 'waive' | 'edit' | 'detail'
}

interface GetColumnsProps {
  setRowAction: React.Dispatch<React.SetStateAction<DataTableRowAction<EnhancedVendorResponse> | null>>
}

// 파일 다운로드 핸들러
async function handleFileDownload(
  filePath: string,
  fileName: string,
  type: "client" | "vendor" = "client",
  id?: number
) {
  try {
    const params = new URLSearchParams({
      path: filePath,
      type: type,
    });

    if (id) {
      if (type === "client") {
        params.append("revisionId", id.toString());
      } else {
        params.append("responseFileId", id.toString());
      }
    }

    const response = await fetch(`/api/rfq-attachments/download?${params.toString()}`);

    if (!response.ok) {
      const errorData = await response.json();
      throw new Error(errorData.error || `Download failed: ${response.status}`);
    }

    const blob = await response.blob();
    const url = window.URL.createObjectURL(blob);
    const link = document.createElement('a');
    link.href = url;
    link.download = fileName;
    document.body.appendChild(link);
    link.click();

    document.body.removeChild(link);
    window.URL.revokeObjectURL(url);

  } catch (error) {
    console.error("❌ 파일 다운로드 실패:", error);
    alert(`파일 다운로드에 실패했습니다: ${error instanceof Error ? error.message : '알 수 없는 오류'}`);
  }
}

// 상태별 정보 반환
function getEffectiveStatusInfo(effectiveStatus: string) {
  switch (effectiveStatus) {
    case "NOT_RESPONDED":
      return {
        icon: Clock,
        label: "미응답",
        variant: "outline" as const,
        color: "text-orange-600"
      };
    case "UP_TO_DATE":
      return {
        icon: CheckCircle,
        label: "최신",
        variant: "default" as const,
        color: "text-green-600"
      };
    case "VERSION_MISMATCH":
      return {
        icon: RefreshCw,
        label: "업데이트 필요",
        variant: "secondary" as const,
        color: "text-blue-600"
      };
    case "REVISION_REQUESTED":
      return {
        icon: AlertTriangle,
        label: "수정요청",
        variant: "secondary" as const,
        color: "text-yellow-600"
      };
    case "WAIVED":
      return {
        icon: FileX,
        label: "포기",
        variant: "outline" as const,
        color: "text-gray-600"
      };
    default:
      return {
        icon: FileText,
        label: effectiveStatus,
        variant: "outline" as const,
        color: "text-gray-600"
      };
  }
}

// 파일명 컴포넌트
function AttachmentFileNameCell({ revisions }: {
  revisions: Array<{
    id: number;
    originalFileName: string;
    revisionNo: string;
    isLatest: boolean;
    filePath?: string;
    fileSize: number;
    createdAt: string;
    revisionComment?: string;
  }>
}) {
  if (!revisions || revisions.length === 0) {
    return <span className="text-muted-foreground">파일 없음</span>;
  }

  const latestRevision = revisions.find(r => r.isLatest) || revisions[0];
  const hasMultipleRevisions = revisions.length > 1;
  const canDownload = latestRevision.filePath;

  return (
    <div className="space-y-1">
      <div className="flex items-center gap-2">
        {canDownload ? (
          <button
            onClick={() => handleFileDownload(
              latestRevision.filePath!,
              latestRevision.originalFileName,
              "client",
              latestRevision.id
            )}
            className="font-medium text-sm text-blue-600 hover:text-blue-800 hover:underline text-left max-w-64 truncate"
            title={`${latestRevision.originalFileName} - 클릭하여 다운로드`}
          >
            {latestRevision.originalFileName}
          </button>
        ) : (
          <span className="font-medium text-sm text-muted-foreground max-w-64 truncate" title={latestRevision.originalFileName}>
            {latestRevision.originalFileName}
          </span>
        )}

        {canDownload && (
          <Button
            size="sm"
            variant="ghost"
            className="h-6 w-6 p-0"
            onClick={() => handleFileDownload(
              latestRevision.filePath!,
              latestRevision.originalFileName,
              "client",
              latestRevision.id
            )}
            title="파일 다운로드"
          >
            <Download className="h-3 w-3" />
          </Button>
        )}

        {hasMultipleRevisions && (
          <Badge variant="outline" className="text-xs">
            v{latestRevision.revisionNo}
          </Badge>
        )}
      </div>

      {hasMultipleRevisions && (
        <div className="text-xs text-muted-foreground">
          총 {revisions.length}개 리비전
        </div>
      )}
    </div>
  );
}

// 리비전 비교 컴포넌트
function RevisionComparisonCell({ response }: { response: EnhancedVendorResponse }) {
  const isUpToDate = response.isVersionMatched;
  const hasResponse = !!response.respondedRevision;
  const versionLag = response.versionLag || 0;

  return (
    <div className="space-y-2">
      <div className="flex items-center gap-2">
        <span className="text-xs text-muted-foreground">발주처:</span>
        <Badge variant="secondary" className="text-xs font-mono">
          {response.currentRevision}
        </Badge>
      </div>
      <div className="flex items-center gap-2">
        <span className="text-xs text-muted-foreground">응답:</span>
        {hasResponse ? (
          <Badge
            variant={isUpToDate ? "default" : "outline"}
            className={cn(
              "text-xs font-mono",
              !isUpToDate && "text-blue-600 border-blue-300"
            )}
          >
            {response.respondedRevision}
          </Badge>
        ) : (
          <span className="text-xs text-muted-foreground">-</span>
        )}
      </div>
      {hasResponse && !isUpToDate && versionLag > 0 && (
        <div className="flex items-center gap-1 text-xs text-blue-600">
          <AlertCircle className="h-3 w-3" />
          <span>{versionLag}버전 차이</span>
        </div>
      )}
      {response.hasMultipleRevisions && (
        <div className="flex items-center gap-1 text-xs text-muted-foreground">
          <GitBranch className="h-3 w-3" />
          <span>다중 리비전</span>
        </div>
      )}
    </div>
  );
}

// 코멘트 표시 컴포넌트
function CommentDisplayCell({ response }: { response: EnhancedVendorResponse }) {
  const hasResponseComment = !!response.responseComment;
  const hasVendorComment = !!response.vendorComment;
  const hasRevisionRequestComment = !!response.revisionRequestComment;
  const hasClientComment = !!response.attachment?.revisions?.find(r => r.revisionComment);

  const commentCount = [hasResponseComment, hasVendorComment, hasRevisionRequestComment, hasClientComment].filter(Boolean).length;

  if (commentCount === 0) {
    return <span className="text-xs text-muted-foreground">-</span>;
  }

  return (
    <div className="space-y-1">
      {hasResponseComment && (
        <div className="flex items-center gap-1">
          <div className="w-2 h-2 rounded-full bg-blue-500" title="벤더 응답 코멘트"></div>
          <span className="text-xs text-blue-600 truncate max-w-32" title={response.responseComment}>
            {response.responseComment}
          </span>
        </div>
      )}

      {hasVendorComment && (
        <div className="flex items-center gap-1">
          <div className="w-2 h-2 rounded-full bg-green-500" title="벤더 내부 메모"></div>
          <span className="text-xs text-green-600 truncate max-w-32" title={response.vendorComment}>
            {response.vendorComment}
          </span>
        </div>
      )}

      {hasRevisionRequestComment && (
        <div className="flex items-center gap-1">
          <div className="w-2 h-2 rounded-full bg-red-500" title="수정 요청 사유"></div>
          <span className="text-xs text-red-600 truncate max-w-32" title={response.revisionRequestComment}>
            {response.revisionRequestComment}
          </span>
        </div>
      )}

      {hasClientComment && (
        <div className="flex items-center gap-1">
          <div className="w-2 h-2 rounded-full bg-orange-500" title="발주처 리비전 코멘트"></div>
          <span className="text-xs text-orange-600 truncate max-w-32" 
                title={response.attachment?.revisions?.find(r => r.revisionComment)?.revisionComment}>
            {response.attachment?.revisions?.find(r => r.revisionComment)?.revisionComment}
          </span>
        </div>
      )}

      {/* <div className="text-xs text-muted-foreground text-center">
        {commentCount}개
      </div> */}
    </div>
  );
}

export function getColumns({
  setRowAction,
}: GetColumnsProps): ColumnDef<EnhancedVendorResponse>[] {
  return [
    // 시리얼 번호 - 핀고정용 최소 너비
    {
      accessorKey: "serialNo",
      header: ({ column }) => (
        <ClientDataTableColumnHeaderSimple column={column} title="시리얼" />
      ),
      cell: ({ row }) => (
        <div className="font-mono text-sm">{row.getValue("serialNo")}</div>
      ),

      meta: {
        excelHeader: "시리얼",
        paddingFactor: 0.8
      },
    },

    // 분류 - 핀고정용 적절한 너비
    {
      accessorKey: "attachmentType",
      header: ({ column }) => (
        <ClientDataTableColumnHeaderSimple column={column} title="분류" />
      ),
      cell: ({ row }) => (
        <div className="space-y-1">
          <div className="font-medium text-sm">{row.getValue("attachmentType")}</div>
          {row.original.attachmentDescription && (
            <div className="text-xs text-muted-foreground truncate max-w-32"
              title={row.original.attachmentDescription}>
              {row.original.attachmentDescription}
            </div>
          )}
        </div>
      ),

      meta: {
        excelHeader: "분류",
        paddingFactor: 1.0
      },
    },

    // 파일명 - 가장 긴 텍스트를 위한 여유 공간
    {
      id: "fileName",
      header: "파일명",
      cell: ({ row }) => (
        <AttachmentFileNameCell revisions={row.original.attachment?.revisions || []} />
      ),

      meta: {
        paddingFactor: 1.5
      },
    },

    // 상태 - 뱃지 크기 고려
    {
      accessorKey: "effectiveStatus",
      header: ({ column }) => (
        <ClientDataTableColumnHeaderSimple column={column} title="상태" />
      ),
      cell: ({ row }) => {
        const statusInfo = getEffectiveStatusInfo(row.getValue("effectiveStatus"));
        const StatusIcon = statusInfo.icon;

        return (
          <div className="space-y-1">
            <Badge variant={statusInfo.variant} className="flex items-center gap-1 w-fit">
              <StatusIcon className="h-3 w-3" />
              <span>{statusInfo.label}</span>
            </Badge>
            {row.original.needsUpdate && (
              <div className="text-xs text-blue-600 flex items-center gap-1">
                <RefreshCw className="h-3 w-3" />
                <span>업데이트 권장</span>
              </div>
            )}
          </div>
        );
      },

      meta: {
        excelHeader: "상태",
        paddingFactor: 1.2
      },
    },

    // 리비전 현황 - 복합 정보로 넓은 공간 필요
    {
      id: "revisionStatus",
      header: "리비전 현황",
      cell: ({ row }) => <RevisionComparisonCell response={row.original} />,

      meta: {
        paddingFactor: 1.3
      },
    },

    // 요청일 - 날짜 형식 고정
    {
      accessorKey: "requestedAt",
      header: ({ column }) => (
        <ClientDataTableColumnHeaderSimple column={column} title="요청일" />
      ),
      cell: ({ row }) => (
        <div className="text-sm flex items-center gap-1">
          <Calendar className="h-3 w-3 text-muted-foreground" />
          <span className="whitespace-nowrap">{formatDateTime(new Date(row.getValue("requestedAt")))}</span>
        </div>
      ),

      meta: {
        excelHeader: "요청일",
        paddingFactor: 0.9
      },
    },

    // 응답일 - 날짜 형식 고정
    {
      accessorKey: "respondedAt",
      header: ({ column }) => (
        <ClientDataTableColumnHeaderSimple column={column} title="응답일" />
      ),
      cell: ({ row }) => (
        <div className="text-sm">
          <span className="whitespace-nowrap">
            {row.getValue("respondedAt")
              ? formatDateTime(new Date(row.getValue("respondedAt")))
              : "-"
            }
          </span>
        </div>
      ),
      meta: {
        excelHeader: "응답일",
        paddingFactor: 0.9
      },
    },

    // 응답파일 - 작은 공간
    {
      accessorKey: "totalResponseFiles",
      header: ({ column }) => (
        <ClientDataTableColumnHeaderSimple column={column} title="응답파일" />
      ),
      cell: ({ row }) => (
        <div className="text-center">
          <div className="text-sm font-medium">
            {row.getValue("totalResponseFiles")}개
          </div>
          {row.original.latestResponseFileName && (
            <div className="text-xs text-muted-foreground truncate max-w-20"
              title={row.original.latestResponseFileName}>
              {row.original.latestResponseFileName}
            </div>
          )}
        </div>
      ),
      meta: {
        excelHeader: "응답파일",
        paddingFactor: 0.8
      },
    },

    // 코멘트 - 가변 텍스트 길이
    {
      id: "comments",
      header: "코멘트",
      cell: ({ row }) => <CommentDisplayCell response={row.original} />,
      // size: 180, 
      meta: {
        paddingFactor: 1.4
      },
    },

    // 진행도 - 중간 크기
    {
      id: "progress",
      header: "진행도",
      cell: ({ row }) => (
        <div className="space-y-1 text-center">
          {row.original.hasMultipleRevisions && (
            <Badge variant="outline" className="text-xs">
              다중 리비전
            </Badge>
          )}
          {row.original.versionLag !== undefined && row.original.versionLag > 0 && (
            <div className="text-xs text-blue-600 whitespace-nowrap">
              {row.original.versionLag}버전 차이
            </div>
          )}
        </div>
      ),
      // size: 100, 
      meta: {
        paddingFactor: 1.1
      },
    },

{
  id: "actions",
  enableHiding: false,
  cell: function Cell({ row }) {
    const response = row.original;

    return (
      <DropdownMenu>
        <DropdownMenuTrigger asChild>
          <Button
            aria-label="Open menu"
            variant="ghost"
            className="flex size-8 p-0 data-[state=open]:bg-muted"
          >
            <Ellipsis className="size-4" aria-hidden="true" />
          </Button>
        </DropdownMenuTrigger>
        <DropdownMenuContent align="end" className="w-56">
            {/* 상태별 주요 액션들 */}
            {response.effectiveStatus === "NOT_RESPONDED" && (
              <>
                <DropdownMenuItem asChild>
                  <UploadResponseDialog
                    responseId={response.responseId}
                    attachmentType={response.attachmentType}
                    serialNo={response.serialNo}
                    currentRevision={response.currentRevision}
                    trigger={
                      <div className="flex items-center w-full cursor-pointer p-2">
                        <Upload className="size-4 mr-2" />
                        업로드
                      </div>
                    }
                  />
                </DropdownMenuItem>
                <DropdownMenuItem asChild>
                  <WaiveResponseDialog
                    responseId={response.responseId}
                    attachmentType={response.attachmentType}
                    serialNo={response.serialNo}
                    trigger={
                      <div className="flex items-center w-full cursor-pointer p-2">
                        <FileX className="size-4 mr-2" />
                        포기
                      </div>
                    }
                  />
                </DropdownMenuItem>
              </>
            )}
            
            {response.effectiveStatus === "REVISION_REQUESTED" && (
              <DropdownMenuItem asChild>
                <UploadResponseDialog
                  responseId={response.responseId}
                  attachmentType={response.attachmentType}
                  serialNo={response.serialNo}
                  currentRevision={response.currentRevision}
                  trigger={
                    <div className="flex items-center w-full cursor-pointer p-2">
                      <FileText className="size-4 mr-2" />
                      수정
                    </div>
                  }
                />
              </DropdownMenuItem>
            )}
            
            {response.effectiveStatus === "VERSION_MISMATCH" && (
              <DropdownMenuItem asChild>
                <UploadResponseDialog
                  responseId={response.responseId}
                  attachmentType={response.attachmentType}
                  serialNo={response.serialNo}
                  currentRevision={response.currentRevision}
                  trigger={
                    <div className="flex items-center w-full cursor-pointer p-2">
                      <RefreshCw className="size-4 mr-2" />
                      업데이트
                    </div>
                  }
                />
              </DropdownMenuItem>
            )}
            
            {/* 구분선 - 주요 액션과 보조 액션 분리 */}
            {(response.effectiveStatus === "NOT_RESPONDED" || 
              response.effectiveStatus === "REVISION_REQUESTED" || 
              response.effectiveStatus === "VERSION_MISMATCH") && 
              response.effectiveStatus !== "WAIVED" && (
              <DropdownMenuSeparator />
            )}
            
            {/* 공통 액션들 */}
            {response.effectiveStatus !== "WAIVED" && (
              <DropdownMenuItem asChild>
                <CommentEditDialog
                  responseId={response.responseId}
                  currentResponseComment={response.responseComment || ""}
                  currentVendorComment={response.vendorComment || ""}
                  trigger={
                    <div className="flex items-center w-full cursor-pointer p-2">
                      <MessageSquare className="size-4 mr-2" />
                      코멘트 편집
                    </div>
                  }
                />
              </DropdownMenuItem>
            )}
            
            <DropdownMenuItem asChild>
              <ResponseDetailSheet
                response={response}
                trigger={
                  <div className="flex items-center w-full cursor-pointer p-2">
                    <FileText className="size-4 mr-2" />
                    상세보기
                  </div>
                }
              />
            </DropdownMenuItem>
          </DropdownMenuContent>
        </DropdownMenu>

    )
  },
  size: 40,
}

  ]
}