"use client"

import * as React from "react"
import { format } from "date-fns"
import { Package, ExternalLink, Download, FileText } from "lucide-react"
import {
  Dialog,
  DialogContent,
  DialogDescription,
  DialogHeader,
  DialogTitle,
} from "@/components/ui/dialog"
import {
  Table,
  TableBody,
  TableCell,
  TableHead,
  TableHeader,
  TableRow,
} from "@/components/ui/table"
import { Badge } from "@/components/ui/badge"
import { Button } from "@/components/ui/button"
import { ScrollArea } from "@/components/ui/scroll-area"
import { Skeleton } from "@/components/ui/skeleton"
import { Separator } from "@/components/ui/separator"
import { toast } from "sonner"
import { RfqsLastView } from "@/db/schema"
import { getRfqItemsAction } from "../service"
import { getDesignDocumentsForRfqItemsAction } from "@/lib/pos"
import { downloadFile } from "@/lib/file-download"

// 품목 타입
interface RfqItem {
  id: number
  rfqsLastId: number | null
  rfqItem: string | null
  prItem: string | null
  prNo: string | null
  materialCode: string | null
  materialCategory: string | null
  acc: string | null
  materialDescription: string | null
  size: string | null
  deliveryDate: Date | null
  quantity: number | null
  uom: string | null
  grossWeight: number | null
  gwUom: string | null
  specNo: string | null
  specUrl: string | null
  trackingNo: string | null
  majorYn: boolean | null
  remark: string | null
  projectDef: string | null
  projectSc: string | null
  projectKl: string | null
  projectLc: string | null
  projectDl: string | null
  // RFQ 관련 정보
  rfqCode: string | null
  rfqType: string | null
  rfqTitle: string | null
  itemCode: string | null
  itemName: string | null
  projectCode: string | null
  projectName: string | null
}

interface ItemStatistics {
  total: number
  major: number
  regular: number
  totalQuantity: number
  totalWeight: number
}

interface RfqItemsDialogProps {
  isOpen: boolean
  onClose: () => void
  rfqData: RfqsLastView
}

export function RfqItemsDialog({ isOpen, onClose, rfqData }: RfqItemsDialogProps) {
  const [items, setItems] = React.useState<RfqItem[]>([])
  const [statistics, setStatistics] = React.useState<ItemStatistics | null>(null)
  const [isLoading, setIsLoading] = React.useState(false)
  // 자재코드별 설계 문서 매핑
  const [designDocuments, setDesignDocuments] = React.useState<Record<string, {
    id: number;
    fileName: string;
    filePath: string;
    fileSize: number | null;
    fileType: string | null;
    description: string | null;
  }>>({})
  const [isLoadingDocs, setIsLoadingDocs] = React.useState(false)

  // 품목 목록 및 설계 문서 로드
  React.useEffect(() => {
    if (!isOpen || !rfqData.id) return

    const loadData = async () => {
      setIsLoading(true)
      setIsLoadingDocs(true)
      
      try {
        // 1. 품목 목록 로드
        const itemsResult = await getRfqItemsAction(rfqData.id)
        
        if (itemsResult.success) {
          setItems(itemsResult.data)
          setStatistics(itemsResult.statistics || null)
        } else {
          toast.error(itemsResult.error || "품목을 불러오는데 실패했습니다")
          setItems([])
          setStatistics(null)
        }

        // 2. 설계 문서 매핑 로드
        const docsResult = await getDesignDocumentsForRfqItemsAction(rfqData.id)
        
        if (docsResult.success && docsResult.documents) {
          setDesignDocuments(docsResult.documents)
        } else {
          console.warn("설계 문서 매핑 로드 실패:", docsResult.error)
          setDesignDocuments({})
        }
        
      } catch (error) {
        console.error("데이터 로드 오류:", error)
        toast.error("데이터를 불러오는데 실패했습니다")
        setItems([])
        setStatistics(null)
        setDesignDocuments({})
      } finally {
        setIsLoading(false)
        setIsLoadingDocs(false)
      }
    }

    loadData()
  }, [isOpen, rfqData.id])

  // 사양서 링크 열기
  const handleOpenSpec = (specUrl: string) => {
    window.open(specUrl, '_blank', 'noopener,noreferrer')
  }

  // 설계 문서 다운로드
  const handleDownloadDesignDoc = async (materialCode: string, fileName: string, filePath: string) => {
    try {
      await downloadFile(filePath, fileName, {
        action: 'download',
        showToast: true
      })
    } catch (error) {
      console.error("설계 문서 다운로드 오류:", error)
      toast.error("설계 문서 다운로드에 실패했습니다")
    }
  }

  // 파일 크기 포맷팅
  const formatFileSize = (bytes: number | null) => {
    if (!bytes) return ""
    const sizes = ['B', 'KB', 'MB', 'GB']
    if (bytes === 0) return '0 B'
    const i = Math.floor(Math.log(bytes) / Math.log(1024))
    return Math.round(bytes / Math.pow(1024, i) * 100) / 100 + ' ' + sizes[i]
  }


  return (
    <Dialog open={isOpen} onOpenChange={onClose}>
      <DialogContent className="max-w-7xl h-[90vh] flex flex-col">
        <DialogHeader>
          <DialogTitle>견적 품목 목록</DialogTitle>
          <DialogDescription>
            {rfqData.rfqCode} - {rfqData.rfqTitle || rfqData.itemName || "품목 정보"}
          </DialogDescription>
        </DialogHeader>

        {/* 통계 정보 */}
        {statistics && !isLoading && (
          <>
<div className="grid grid-cols-2 sm:grid-cols-3 md:grid-cols-4 gap-3 py-3">
<div className="text-center">
                <div className="text-2xl font-bold text-primary">{statistics.total}</div>
                <div className="text-xs text-muted-foreground">전체 품목</div>
              </div>
              {/* <div className="text-center">
                <div className="text-2xl font-bold text-blue-600">{statistics.major}</div>
                <div className="text-xs text-muted-foreground">주요 품목</div>
              </div> */}
              <div className="text-center">
                <div className="text-2xl font-bold text-gray-600">{statistics.regular}</div>
                <div className="text-xs text-muted-foreground">일반 품목</div>
              </div>
              <div className="text-center">
                <div className="text-2xl font-bold text-green-600">{statistics.totalQuantity.toLocaleString()}</div>
                <div className="text-xs text-muted-foreground">총 수량</div>
              </div>
              <div className="text-center">
                <div className="text-2xl font-bold text-orange-600">{statistics.totalWeight.toLocaleString()}</div>
                <div className="text-xs text-muted-foreground">총 중량 (KG)</div>
              </div>
            </div>
            <Separator />
          </>
        )}

        <ScrollArea className="flex-1">
          {isLoading ? (
            <Table>
              <TableHeader>
                <TableRow>
                  <TableHead className="w-[60px]">아이템</TableHead>
                  <TableHead className="w-[120px]">자재코드</TableHead>
                  <TableHead>자재명</TableHead>
                  <TableHead className="w-[80px]">수량</TableHead>
                  <TableHead className="w-[60px]">수량단위</TableHead>
                  <TableHead className="w-[80px]">중량</TableHead>
                  <TableHead className="w-[60px]">중량단위</TableHead>
                  <TableHead className="w-[100px]">납기일</TableHead>
                  <TableHead className="w-[100px]">PR번호</TableHead>
                  <TableHead className="w-[120px]">사양/설계문서</TableHead>
                  <TableHead>비고</TableHead>
                </TableRow>
              </TableHeader>
              <TableBody>
                {[...Array(3)].map((_, i) => (
                  <TableRow key={i}>
                    <TableCell><Skeleton className="h-8 w-full" /></TableCell>
                    <TableCell><Skeleton className="h-8 w-full" /></TableCell>
                    <TableCell><Skeleton className="h-8 w-full" /></TableCell>
                    <TableCell><Skeleton className="h-8 w-full" /></TableCell>
                    <TableCell><Skeleton className="h-8 w-full" /></TableCell>
                    <TableCell><Skeleton className="h-8 w-full" /></TableCell>
                    <TableCell><Skeleton className="h-8 w-full" /></TableCell>
                    <TableCell><Skeleton className="h-8 w-full" /></TableCell>
                    <TableCell><Skeleton className="h-8 w-full" /></TableCell>
                    <TableCell><Skeleton className="h-8 w-full" /></TableCell>
                    <TableCell><Skeleton className="h-8 w-full" /></TableCell>
                    <TableCell><Skeleton className="h-8 w-full" /></TableCell>
                    <TableCell><Skeleton className="h-8 w-full" /></TableCell>
                  </TableRow>
                ))}
              </TableBody>
            </Table>
          ) : items.length === 0 ? (
            <div className="text-center text-muted-foreground py-12">
              <Package className="h-12 w-12 mx-auto mb-4 text-muted-foreground" />
              <p>품목이 없습니다.</p>
            </div>
          ) : (
            <Table>
              <TableHeader>
                <TableRow>
                  <TableHead className="w-[60px]">아이템</TableHead>
                  <TableHead className="w-[120px]">자재코드</TableHead>
                  <TableHead>자재명</TableHead>
                  <TableHead className="w-[80px]">수량</TableHead>
                  <TableHead className="w-[60px]">수량단위</TableHead>
                  <TableHead className="w-[80px]">중량</TableHead>
                  <TableHead className="w-[60px]">중량단위</TableHead>
                  <TableHead className="w-[100px]">납기일</TableHead>
                  <TableHead className="w-[100px]">PR번호</TableHead>
                  <TableHead className="w-[100px]">PR 아이템 번호</TableHead>
                  <TableHead className="w-[120px]">사양/설계문서</TableHead>
                  <TableHead className="w-[100px]">프로젝트</TableHead>
                  <TableHead>비고</TableHead>
                </TableRow>
              </TableHeader>
              <TableBody>
                {items.map((item, index) => (
                  <TableRow key={item.id} className={item.majorYn ? "bg-blue-50 border-l-4 border-l-blue-500" : ""}>
                    <TableCell>
                      <div className="flex flex-col items-center gap-1">
                        <span className="text-xs font-mono">#{index + 1}</span>
                        {item.majorYn && (
                          <Badge variant="default" className="text-xs px-1 py-0">
                            주요
                          </Badge>
                        )}
                      </div>
                    </TableCell>
                    <TableCell>
                      <div className="flex flex-col">
                        <span className="font-mono text-sm font-medium">{item.materialCode || "-"}</span>
                        {item.acc && (
                          <span className="text-xs text-muted-foreground font-mono">
                            ACC: {item.acc}
                          </span>
                        )}
                      </div>
                    </TableCell>
                    <TableCell>
                      <div className="flex flex-col">
                        <span className="text-sm font-medium" title={item.materialDescription || ""}>
                          {item.materialDescription || "-"}
                        </span>
                        {item.materialCategory && (
                          <span className="text-xs text-muted-foreground">
                            {item.materialCategory}
                          </span>
                        )}
                        {item.size && (
                          <span className="text-xs text-muted-foreground">
                            크기: {item.size}
                          </span>
                        )}
                      </div>
                    </TableCell>
                    <TableCell>
                      <span className="text-sm font-medium">
                        {item.quantity ? item.quantity.toLocaleString() : "-"}
                      </span>
                    </TableCell>
                    <TableCell>
                      <span className="text-sm text-muted-foreground">
                        {item.uom || "-"}
                      </span>
                    </TableCell>
                    <TableCell>
                      <span className="text-sm font-medium">
                        {item.grossWeight ? item.grossWeight.toLocaleString() : "-"}
                      </span>
                    </TableCell>
                    <TableCell>
                      <span className="text-sm text-muted-foreground">
                        {item.gwUom || "-"}
                      </span>
                    </TableCell>
                    <TableCell>
                      <span className="text-sm">
                        {item.deliveryDate ? format(new Date(item.deliveryDate), "yyyy-MM-dd") : "-"}
                      </span>
                    </TableCell>
                    <TableCell>
                      <span className="text-xs font-mono">{item.prNo || "-"}</span>
                    </TableCell>
                    <TableCell>
                      <span className="text-xs font-mono">{item.prItem || "-"}</span>
                    </TableCell>
                    <TableCell>
                      <div className="flex flex-col gap-1">
                        {/* 기존 스펙 정보 */}
                        <div className="flex items-center gap-1">
                          {item.specNo && (
                            <span className="text-xs font-mono">{item.specNo}</span>
                          )}
                          {item.specUrl && (
                            <Button
                              variant="ghost"
                              size="sm"
                              className="h-5 w-5 p-0"
                              onClick={() => handleOpenSpec(item.specUrl!)}
                              title="사양서 열기"
                            >
                              <ExternalLink className="h-3 w-3" />
                            </Button>
                          )}
                        </div>
                        
                        {/* 설계 문서 다운로드 */}
                        {item.materialCode && designDocuments[item.materialCode] && (
                          <div className="flex items-center gap-1">
                            <FileText className="h-3 w-3 text-blue-500" />
                            <Button
                              variant="ghost"
                              size="sm"
                              className="h-5 p-1 text-xs text-blue-600 hover:text-blue-800"
                              onClick={() => handleDownloadDesignDoc(
                                item.materialCode!,
                                designDocuments[item.materialCode!].fileName,
                                designDocuments[item.materialCode!].filePath
                              )}
                              title={`설계문서: ${designDocuments[item.materialCode!].fileName} (${formatFileSize(designDocuments[item.materialCode!].fileSize)})`}
                            >
                              <Download className="h-3 w-3 mr-1" />
                              설계문서
                            </Button>
                          </div>
                        )}
                        
                        {/* 트래킹 번호 */}
                        {item.trackingNo && (
                          <div className="text-xs text-muted-foreground">
                            TRK: {item.trackingNo}
                          </div>
                        )}
                        
                        {/* 설계 문서 로딩 상태 */}
                        {isLoadingDocs && item.materialCode && (
                          <div className="text-xs text-muted-foreground">
                            설계문서 확인 중...
                          </div>
                        )}
                      </div>
                    </TableCell>
                    <TableCell>
                      <div className="text-xs">
                        {[
                          item.projectDef && `${item.projectDef}`,
                          item.projectSc && `SC: ${item.projectSc}`,
                          item.projectKl && `KL: ${item.projectKl}`,
                          item.projectLc && `LC: ${item.projectLc}`,
                          item.projectDl && `DL: ${item.projectDl}`
                        ].filter(Boolean).join(" | ") || "-"}
                      </div>
                    </TableCell>
                    <TableCell>
                      <span className="text-xs" title={item.remark || ""}>
                        {item.remark ? (item.remark.length > 30 ? `${item.remark.slice(0, 30)}...` : item.remark) : "-"}
                      </span>
                    </TableCell>
                  </TableRow>
                ))}
              </TableBody>
            </Table>
          )}
        </ScrollArea>

        {/* 하단 통계 정보 */}
        {statistics && !isLoading && (
          <div className="border-t pt-3 text-xs text-muted-foreground">
            <div className="flex justify-between items-center">
              <span>
                총 {statistics.total}개 품목 
                {/* (주요: {statistics.major}개, 일반: {statistics.regular}개) */}
              </span>
              <span>
                전체 수량: {statistics.totalQuantity.toLocaleString()} | 
                전체 중량: {statistics.totalWeight.toLocaleString()} KG
              </span>
            </div>
          </div>
        )}
      </DialogContent>
    </Dialog>
  )
}