"use client";

import { ColumnDef } from "@tanstack/react-table";
import { Badge } from "@/components/ui/badge";
import { Button } from "@/components/ui/button";
import { ChevronDown, ChevronRight, FileIcon, Download, Loader2 } from "lucide-react";
import { formatDistanceToNow } from "date-fns";
import { ko } from "date-fns/locale";
import type { SwpDocumentWithStats } from "../actions";
import { downloadSwpFile } from "../actions";
import { useState } from "react";
import { toast } from "sonner";

export const swpDocumentColumns: ColumnDef<SwpDocumentWithStats>[] = [
  {
    id: "expander",
    header: () => null,
    cell: () => {
      return (
        <Button
          variant="ghost"
          size="sm"
          className="h-8 w-8 p-0"
        >
          <ChevronRight className="h-4 w-4" />
        </Button>
      );
    },
    size: 50,
  },
  {
    accessorKey: "DOC_NO",
    header: "문서번호",
    cell: ({ row }) => (
      <div className="font-mono text-sm">{row.original.DOC_NO}</div>
    ),
    size: 250,
  },
  {
    accessorKey: "DOC_TITLE",
    header: "문서제목",
    cell: ({ row }) => (
      <div className="max-w-md truncate" title={row.original.DOC_TITLE}>
        {row.original.DOC_TITLE}
      </div>
    ),
    size: 300,
  },
  {
    accessorKey: "PROJ_NO",
    header: "프로젝트",
    cell: ({ row }) => (
      <div>
        <div className="font-medium">{row.original.PROJ_NO}</div>
        {row.original.PROJ_NM && (
          <div className="text-xs text-muted-foreground truncate max-w-[150px]">
            {row.original.PROJ_NM}
          </div>
        )}
      </div>
    ),
    size: 150,
  },
  {
    accessorKey: "PKG_NO",
    header: "패키지",
    cell: ({ row }) => row.original.PKG_NO || "-",
    size: 100,
  },
  {
    accessorKey: "VNDR_CD",
    header: "업체",
    cell: ({ row }) => (
      <div>
        {row.original.VNDR_CD && (
          <div className="text-xs text-muted-foreground">{row.original.VNDR_CD}</div>
        )}
        {row.original.CPY_NM && (
          <div className="text-sm truncate max-w-[120px]" title={row.original.CPY_NM}>
            {row.original.CPY_NM}
          </div>
        )}
      </div>
    ),
    size: 120,
  },
  {
    accessorKey: "STAGE",
    header: "스테이지",
    cell: ({ row }) => {
      const stage = row.original.STAGE;
      if (!stage) return "-";
      
      const color = 
        stage === "IFC" ? "bg-green-100 text-green-800" :
        stage === "IFA" ? "bg-blue-100 text-blue-800" :
        "bg-gray-100 text-gray-800";
      
      return (
        <Badge variant="outline" className={color}>
          {stage}
        </Badge>
      );
    },
    size: 80,
  },
  {
    accessorKey: "LTST_REV_NO",
    header: "최신 REV",
    cell: ({ row }) => row.original.LTST_REV_NO || "-",
    size: 80,
  },
  {
    id: "stats",
    header: "REV/파일",
    cell: ({ row }) => (
      <div className="text-center">
        <div className="text-sm font-medium">
          {row.original.revision_count} / {row.original.file_count}
        </div>
      </div>
    ),
    size: 100,
  },
  {
    accessorKey: "sync_status",
    header: "상태",
    cell: ({ row }) => {
      const status = row.original.sync_status;
      const color = 
        status === "synced" ? "bg-green-100 text-green-800" :
        status === "pending" ? "bg-yellow-100 text-yellow-800" :
        "bg-red-100 text-red-800";
      
      return (
        <Badge variant="outline" className={color}>
          {status}
        </Badge>
      );
    },
    size: 80,
  },
  {
    accessorKey: "last_synced_at",
    header: "동기화",
    cell: ({ row }) => (
      <div className="text-xs text-muted-foreground">
        {formatDistanceToNow(new Date(row.original.last_synced_at), {
          addSuffix: true,
          locale: ko,
        })}
      </div>
    ),
    size: 100,
  },
];

// ============================================================================
// 리비전 컬럼 (서브 테이블용)
// ============================================================================

export interface RevisionRow {
  id: number;
  DOC_NO: string;
  REV_NO: string;
  STAGE: string;
  ACTV_NO: string | null;
  OFDC_NO: string | null;
  sync_status: "synced" | "pending" | "error";
  last_synced_at: Date;
  file_count: number;
}

export const swpRevisionColumns: ColumnDef<RevisionRow>[] = [
  {
    id: "expander",
    header: () => null,
    cell: ({ row }) => {
      return row.getCanExpand() ? (
        <Button
          variant="ghost"
          size="sm"
          className="h-8 w-8 p-0 ml-8"
        >
          {row.getIsExpanded() ? (
            <ChevronDown className="h-4 w-4" />
          ) : (
            <ChevronRight className="h-4 w-4" />
          )}
        </Button>
      ) : null;
    },
    size: 100,
  },
  {
    accessorKey: "REV_NO",
    header: "리비전",
    cell: ({ row }) => (
      <Badge variant="secondary" className="font-mono">
        REV {row.original.REV_NO}
      </Badge>
    ),
    size: 100,
  },
  {
    accessorKey: "STAGE",
    header: "스테이지",
    cell: ({ row }) => {
      const stage = row.original.STAGE;
      const color = 
        stage === "IFC" ? "bg-green-100 text-green-800" :
        stage === "IFA" ? "bg-blue-100 text-blue-800" :
        "bg-gray-100 text-gray-800";
      
      return (
        <Badge variant="outline" className={color}>
          {stage}
        </Badge>
      );
    },
    size: 100,
  },
  {
    accessorKey: "OFDC_NO",
    header: "OFDC 번호",
    cell: ({ row }) => (
      <div className="font-mono text-sm">{row.original.OFDC_NO || "-"}</div>
    ),
    size: 200,
  },
  {
    accessorKey: "ACTV_NO",
    header: "Activity",
    cell: ({ row }) => (
      <div className="font-mono text-xs text-muted-foreground">
        {row.original.ACTV_NO || "-"}
      </div>
    ),
    size: 250,
  },
  {
    id: "file_count",
    header: "파일 수",
    cell: ({ row }) => (
      <div className="flex items-center gap-2">
        <FileIcon className="h-4 w-4 text-muted-foreground" />
        <span className="font-medium">{row.original.file_count}</span>
      </div>
    ),
    size: 100,
  },
  {
    accessorKey: "sync_status",
    header: "상태",
    cell: ({ row }) => {
      const status = row.original.sync_status;
      const color = 
        status === "synced" ? "bg-green-100 text-green-800" :
        status === "pending" ? "bg-yellow-100 text-yellow-800" :
        "bg-red-100 text-red-800";
      
      return (
        <Badge variant="outline" className={color}>
          {status}
        </Badge>
      );
    },
    size: 80,
  },
  {
    accessorKey: "last_synced_at",
    header: "동기화",
    cell: ({ row }) => (
      <div className="text-xs text-muted-foreground">
        {formatDistanceToNow(new Date(row.original.last_synced_at), {
          addSuffix: true,
          locale: ko,
        })}
      </div>
    ),
    size: 100,
  },
];

// ============================================================================
// 파일 컬럼 (서브 서브 테이블용)
// ============================================================================

export interface FileRow {
  id: number;
  FILE_NM: string;
  FILE_SEQ: string;
  FILE_SZ: string | null;
  FLD_PATH: string | null;
  STAT: string | null;
  STAT_NM: string | null;
  sync_status: "synced" | "pending" | "error";
  created_at: Date;
}

export const swpFileColumns: ColumnDef<FileRow>[] = [
  {
    id: "spacer",
    header: () => null,
    cell: () => <div className="w-16" />,
    size: 150,
  },
  {
    accessorKey: "FILE_SEQ",
    header: "순서",
    cell: ({ row }) => (
      <Badge variant="outline" className="font-mono">
        #{row.original.FILE_SEQ}
      </Badge>
    ),
    size: 80,
  },
  {
    accessorKey: "FILE_NM",
    header: "파일명",
    cell: ({ row }) => (
      <div className="flex items-center gap-2">
        <FileIcon className="h-4 w-4 text-blue-500" />
        <span className="font-mono text-sm">{row.original.FILE_NM}</span>
      </div>
    ),
    size: 400,
  },
  {
    accessorKey: "FILE_SZ",
    header: "크기",
    cell: ({ row }) => {
      const size = row.original.FILE_SZ;
      if (!size) return "-";
      
      const bytes = parseInt(size, 10);
      if (isNaN(bytes)) return size;
      
      const kb = bytes / 1024;
      const mb = kb / 1024;
      
      return mb >= 1
        ? `${mb.toFixed(2)} MB`
        : `${kb.toFixed(2)} KB`;
    },
    size: 100,
  },
  {
    accessorKey: "STAT_NM",
    header: "상태",
    cell: ({ row }) => {
      const status = row.original.STAT_NM;
      if (!status) return "-";
      
      const color = status === "Complete" 
        ? "bg-green-100 text-green-800" 
        : "bg-gray-100 text-gray-800";
      
      return (
        <Badge variant="outline" className={color}>
          {status}
        </Badge>
      );
    },
    size: 100,
  },
  {
    accessorKey: "FLD_PATH",
    header: "경로",
    cell: ({ row }) => (
      <div className="font-mono text-xs text-muted-foreground truncate max-w-[200px]" title={row.original.FLD_PATH || ""}>
        {row.original.FLD_PATH || "-"}
      </div>
    ),
    size: 200,
  },
  {
    accessorKey: "created_at",
    header: "생성일",
    cell: ({ row }) => (
      <div className="text-xs text-muted-foreground">
        {formatDistanceToNow(new Date(row.original.created_at), {
          addSuffix: true,
          locale: ko,
        })}
      </div>
    ),
    size: 100,
  },
  {
    id: "actions",
    header: "작업",
    cell: ({ row }) => (
      <DownloadButton fileId={row.original.id} fileName={row.original.FILE_NM} />
    ),
    size: 120,
  },
];

// ============================================================================
// 다운로드 버튼 컴포넌트: 임시 구성. Download.aspx 동작 안해서 일단 네트워크드라이브 사용하도록 처리
// ============================================================================

interface DownloadButtonProps {
  fileId: number;
  fileName: string;
}

function DownloadButton({ fileId, fileName }: DownloadButtonProps) {
  const [isDownloading, setIsDownloading] = useState(false);

  const handleDownload = async () => {
    try {
      setIsDownloading(true);
      
      // 서버 액션 호출
      const result = await downloadSwpFile(fileId);

      if (!result.success || !result.data) {
        toast.error(result.error || "파일 다운로드 실패");
        return;
      }

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

      toast.success(`파일 다운로드 완료: ${result.fileName}`);
    } catch (error) {
      console.error("다운로드 오류:", error);
      toast.error("파일 다운로드 중 오류가 발생했습니다.");
    } finally {
      setIsDownloading(false);
    }
  };

  return (
    <Button
      variant="outline"
      size="sm"
      onClick={handleDownload}
      disabled={isDownloading}
    >
      {isDownloading ? (
        <>
          <Loader2 className="h-4 w-4 mr-1 animate-spin" />
          다운로드 중...
        </>
      ) : (
        <>
          <Download className="h-4 w-4 mr-1" />
          다운로드
        </>
      )}
    </Button>
  );
}