"use client"

import { useState, useEffect } from "react"
import { Card, CardContent, CardHeader, CardTitle } from "@/components/ui/card"
import { Badge } from "@/components/ui/badge"
import { Button } from "@/components/ui/button"

import { 
  CheckCircle, 
  XCircle, 
  FileText, 
  AlertCircle,
  Eye,
  Upload
} from "lucide-react"
import { DocumentStatusDialog } from "@/components/vendor-regular-registrations/document-status-dialog"
import { AdditionalInfoDialog } from "@/components/vendor-regular-registrations/additional-info-dialog"
import { format } from "date-fns"
import { toast } from "sonner"
import { fetchVendorRegistrationStatus } from "@/lib/vendor-regular-registrations/service"

// 세션에서 벤더아이디 가져오기 위한 훅
import { useSession } from "next-auth/react"

// 상태별 정의
const statusConfig = {
  audit_pass: {
    label: "실사통과",
    color: "bg-blue-100 text-blue-800",
    description: "품질담당자(QM) 최종 의견에 따라 실사 통과로 결정된 상태"
  },
  cp_submitted: {
    label: "CP등록",
    color: "bg-green-100 text-green-800", 
    description: "협력업체에서 실사 통과 후 기본계약문서에 대한 답변 제출/서약 완료한 상태"
  },
  cp_review: {
    label: "CP검토",
    color: "bg-yellow-100 text-yellow-800",
    description: "협력업체에서 제출한 CP/GTC에 대한 법무검토 의뢰한 상태"
  },
  cp_finished: {
    label: "CP완료",
    color: "bg-purple-100 text-purple-800",
    description: "CP 답변에 대한 법무검토 완료되어 정규업체 등록 가능한 상태"
  },
  approval_ready: {
    label: "조건충족",
    color: "bg-emerald-100 text-emerald-800",
    description: "정규업체 등록 문서/자료 접수현황에 누락이 없는 상태"
  },
  in_review: {
    label: "정규등록검토",
    color: "bg-orange-100 text-orange-800",
    description: "구매담당자 요청에 따라 정규업체 등록 관리자가 정규업체 등록 가능여부 검토"
  },
  pending_approval: {
    label: "장기미등록",
    color: "bg-red-100 text-red-800",
    description: "정규업체로 등록 요청되어 3개월 이내 정규업체 등록되지 않은 상태"
  }
}

// 필수문서 목록
const requiredDocuments = [
  { key: "businessRegistration", label: "사업자등록증" },
  { key: "creditEvaluation", label: "신용평가서" },
  { key: "bankCopy", label: "통장사본" },
  { key: "cpDocument", label: "CP문서" },
  { key: "gtc", label: "GTC" },
  { key: "standardSubcontract", label: "표준하도급" },
  { key: "safetyHealth", label: "안전보건관리" },
  { key: "ethics", label: "윤리규범준수" },
  { key: "domesticCredit", label: "내국신용장" },
  { key: "safetyQualification", label: "안전적격성평가" },
]

export function VendorRegistrationStatusView() {
  const [additionalInfoDialogOpen, setAdditionalInfoDialogOpen] = useState(false)
  const [documentDialogOpen, setDocumentDialogOpen] = useState(false)
  const [hasSignature, setHasSignature] = useState(false)
  const [data, setData] = useState<any>(null)
  const [loading, setLoading] = useState(true)

  // 세션에서 vendorId 가져오기
  const { data: session, status: sessionStatus } = useSession()
  const vendorId = session?.user?.companyId
  console.log(vendorId)

  // 데이터 로드
  useEffect(() => {
    if (!vendorId) return

    const initialLoad = async () => {
      try {
        const result = await fetchVendorRegistrationStatus(vendorId)
        if (result.success) {
          setData(result.data)
        } else {
          toast.error(result.error)
        }
      } catch {
        toast.error("데이터 로드 중 오류가 발생했습니다.")
      } finally {
        setLoading(false)
      }
    }
    
    initialLoad()
  }, [vendorId])

  if (sessionStatus === "loading" || loading) {
    return <div className="p-8 text-center">로딩 중...</div>
  }

  if (!vendorId) {
    return <div className="p-8 text-center">벤더 정보가 없습니다. 다시 로그인 해주세요.</div>
  }

  if (!data) {
    return <div className="p-8 text-center">데이터를 불러올 수 없습니다.</div>
  }

  const currentStatusConfig = statusConfig[data.registration?.status as keyof typeof statusConfig] || statusConfig.audit_pass

  // 미완성 항목 계산
  const missingDocuments = requiredDocuments.filter(
    doc => !data.documentStatus[doc.key as keyof typeof data.documentStatus]
  )

  // Document Status Dialog에 전달할 registration 데이터 구성
  const registrationForDialog: any = {
    id: data.registration?.id || 0,
    vendorId: data.vendor.id,
    companyName: data.vendor.vendorName,
    businessNumber: data.vendor.taxId,
    representative: data.vendor.representativeName || "",
    country: data.vendor.country || "KR", // 기본값 KR
    potentialCode: data.registration?.potentialCode || "",
    status: data.registration?.status || "audit_pass",
    majorItems: "[]", // 빈 JSON 문자열
    establishmentDate: data.vendor.createdAt || new Date(),
    registrationRequestDate: data.registration?.registrationRequestDate,
    assignedDepartment: data.registration?.assignedDepartment,
    assignedDepartmentCode: data.registration?.assignedDepartmentCode,
    assignedUser: data.registration?.assignedUser,
    assignedUserCode: data.registration?.assignedUserCode,
    remarks: data.registration?.remarks,
    safetyQualificationContent: data.registration?.safetyQualificationContent || null,
    gtcSkipped: data.registration?.gtcSkipped || false,
    additionalInfo: data.additionalInfo,
    documentSubmissions: data.documentStatus, // documentSubmissions를 documentStatus로 설정
    contractAgreements: [],
    basicContracts: data.basicContracts || [], // 실제 데이터 사용
    documentSubmissionsStatus: data.documentStatus,
    contractAgreementsStatus: {
      cpDocument: data.documentStatus.cpDocument,
      gtc: data.documentStatus.gtc,
      standardSubcontract: data.documentStatus.standardSubcontract,
      safetyHealth: data.documentStatus.safetyHealth,
      ethics: data.documentStatus.ethics,
      domesticCredit: data.documentStatus.domesticCredit,
    },
    createdAt: data.registration?.createdAt || new Date(),
    updatedAt: data.registration?.updatedAt || new Date(),
  }

  const handleSignatureUpload = () => {
    // TODO: 서명/직인 업로드 기능 구현
    setHasSignature(true)
    toast.success("서명/직인이 등록되었습니다.")
  }

  const handleAdditionalInfoSave = () => {
    // 데이터 새로고침
    loadData()
  }

  const loadData = async () => {
    if (!vendorId) return
    try {
      const result = await fetchVendorRegistrationStatus(vendorId)
      if (result.success) {
        setData(result.data)
        toast.success("데이터가 새로고침되었습니다.")
      } else {
        toast.error(result.error)
      }
    } catch {
      toast.error("데이터 로드 중 오류가 발생했습니다.")
    }
  }

  return (
    <div className="space-y-6">
      {/* 헤더 섹션 */}
      <div className="space-y-4">
        <div className="flex items-center justify-between">
          <div>
            <h1 className="text-3xl font-bold">정규업체 등록관리 현황</h1>
            <p className="text-muted-foreground">
              {data.registration?.potentialCode || "미등록"} | {data.vendor.companyName}
            </p>
            <p className="text-sm text-muted-foreground mt-1">
              정규업체 등록 진행현황을 확인하세요.
            </p>
          </div>
          <Badge className={currentStatusConfig.color} variant="secondary">
            {currentStatusConfig.label}
          </Badge>
        </div>
      </div>

      {/* 회사 서명/직인 등록 */}
      <Card>
        <CardHeader>
          <CardTitle className="flex items-center gap-2">
            <FileText className="w-5 h-5" />
            회사 서명/직인 등록
            <Badge variant="destructive" className="text-xs">필수</Badge>
          </CardTitle>
        </CardHeader>
        <CardContent>
          {hasSignature ? (
            <div className="flex items-center gap-3 p-4 border rounded-lg bg-green-50">
              <CheckCircle className="w-5 h-5 text-green-600" />
              <span className="text-green-800">서명/직인이 등록되었습니다.</span>
            </div>
          ) : (
            <Button 
              onClick={handleSignatureUpload}
              className="w-full h-20 border-2 border-dashed border-muted-foreground/25 bg-muted/25"
              variant="outline"
            >
              <div className="text-center">
                <Upload className="w-6 h-6 mx-auto mb-2" />
                <span>서명/직인 등록하기</span>
              </div>
            </Button>
          )}
        </CardContent>
      </Card>

      {/* 간소화된 액션 버튼들 */}
      <div className="grid grid-cols-1 md:grid-cols-2 gap-4">
        <Button
          onClick={() => setDocumentDialogOpen(true)}
          variant="outline"
          size="lg"
          className="h-16 flex flex-col items-center gap-2"
        >
          <Eye className="w-6 h-6" />
          <span>문서 현황 확인</span>
        </Button>
        <Button
          onClick={() => setAdditionalInfoDialogOpen(true)}
          variant={data.additionalInfo ? "outline" : "default"}
          size="lg"
          className="h-16 flex flex-col items-center gap-2"
        >
          <FileText className="w-6 h-6" />
          <span>{data.additionalInfo ? "추가정보 수정" : "추가정보 등록"}</span>
        </Button>
      </div>

      {/* 상태 설명 */}
      <Card>
        <CardHeader>
          <CardTitle>현재 상태 안내</CardTitle>
        </CardHeader>
        <CardContent>
          <div className="flex items-start gap-3">
            <Badge className={currentStatusConfig.color} variant="secondary">
              {currentStatusConfig.label}
            </Badge>
            <p className="text-sm text-muted-foreground">
              {currentStatusConfig.description}
            </p>
          </div>
        </CardContent>
      </Card>

      {/* 문서 현황 Dialog */}
      <DocumentStatusDialog
        open={documentDialogOpen}
        onOpenChange={setDocumentDialogOpen}
        registration={registrationForDialog}
        onRefresh={loadData}
      />

      {/* 추가정보 입력 Dialog */}
      <AdditionalInfoDialog
        open={additionalInfoDialogOpen}
        onOpenChange={setAdditionalInfoDialogOpen}
        vendorId={vendorId}
        onSave={handleAdditionalInfoSave}
      />
    </div>
  )
}