"use client"

import { type Table } from "@tanstack/react-table"
import { toast } from "sonner"

import { Button } from "@/components/ui/button"
import { Mail, FileWarning, Scale, FileText } from "lucide-react"
import type { VendorRegularRegistration } from "@/config/vendorRegularRegistrationsColumnsConfig"
import {
  sendMissingContractRequestEmails,
  sendAdditionalInfoRequestEmails,
  skipLegalReview
} from "../service"
import { useState } from "react"
import { SkipReasonDialog } from "@/components/vendor-regular-registrations/skip-reason-dialog"
import { RegistrationRequestDialog } from "@/components/vendor-regular-registrations/registration-request-dialog"
import { ApprovalPreviewDialog } from "@/lib/approval/approval-preview-dialog"
import { useRouter } from "next/navigation"
import { useSession } from "next-auth/react"
import { registerVendorWithApproval } from "../approval-actions"
import { mapRegistrationToTemplateVariables } from "../handlers"
import type { RegistrationRequestData } from "@/components/vendor-regular-registrations/registration-request-dialog"

interface VendorRegularRegistrationsTableToolbarActionsProps {
  table: Table<VendorRegularRegistration>
}

export function VendorRegularRegistrationsTableToolbarActions({
  table,
}: VendorRegularRegistrationsTableToolbarActionsProps) {
  const router = useRouter()
  const { data: session } = useSession()
  
  const [syncLoading, setSyncLoading] = useState<{ 
    missingContract: boolean; 
    additionalInfo: boolean;
    legalSkip: boolean;
    registrationRequest: boolean;
  }>({
    missingContract: false,
    additionalInfo: false,
    legalSkip: false,
    registrationRequest: false,
  })

  const [skipDialogs, setSkipDialogs] = useState<{
    legalReview: boolean;
  }>({
    legalReview: false,
  })

  // 2-step 결재 프로세스를 위한 상태
  const [registrationRequestDialog, setRegistrationRequestDialog] = useState<{
    open: boolean;
    registration: VendorRegularRegistration | null;
  }>({
    open: false,
    registration: null,
  })

  const [approvalDialog, setApprovalDialog] = useState<{
    open: boolean;
    registration: VendorRegularRegistration | null;
  }>({
    open: false,
    registration: null,
  })

  // 결재를 위한 중간 상태 저장
  const [registrationFormData, setRegistrationFormData] = useState<RegistrationRequestData | null>(null)
  const [approvalVariables, setApprovalVariables] = useState<Record<string, string>>({})

  const selectedRows = table.getFilteredSelectedRowModel().rows.map(row => row.original)



  const handleSendMissingContractRequest = async () => {
    if (selectedRows.length === 0) {
      toast.error("이메일을 발송할 업체를 선택해주세요.")
      return
    }

    setSyncLoading(prev => ({ ...prev, missingContract: true }))
    try {
      const vendorIds = selectedRows.map(row => row.vendorId)
      const result = await sendMissingContractRequestEmails(vendorIds)
      
      if (result.success) {
        toast.success(result.message)
      } else {
        toast.error(result.error)
      }
    } catch (error) {
      console.error("Error sending missing contract request:", error)
      toast.error("누락계약요청 이메일 발송 중 오류가 발생했습니다.")
    } finally {
      setSyncLoading(prev => ({ ...prev, missingContract: false }))
    }
  }

  const handleSendAdditionalInfoRequest = async () => {
    if (selectedRows.length === 0) {
      toast.error("이메일을 발송할 업체를 선택해주세요.")
      return
    }

    setSyncLoading(prev => ({ ...prev, additionalInfo: true }))
    try {
      const vendorIds = selectedRows.map(row => row.vendorId)
      const result = await sendAdditionalInfoRequestEmails(vendorIds)
      
      if (result.success) {
        toast.success(result.message)
      } else {
        toast.error(result.error)
      }
    } catch (error) {
      console.error("Error sending additional info request:", error)
      toast.error("추가정보요청 이메일 발송 중 오류가 발생했습니다.")
    } finally {
      setSyncLoading(prev => ({ ...prev, additionalInfo: false }))
    }
  }

  const handleLegalReviewSkip = async (reason: string) => {
    const cpReviewRows = selectedRows.filter(row => row.status === "cp_review");
    if (cpReviewRows.length === 0) {
      toast.error("CP검토 상태인 업체를 선택해주세요.");
      return;
    }

    setSyncLoading(prev => ({ ...prev, legalSkip: true }));
    try {
      const vendorIds = cpReviewRows.map(row => row.vendorId);
      const result = await skipLegalReview(vendorIds, reason);
      
      if (result.success) {
        toast.success(result.message);
        router.refresh();
      } else {
        toast.error(result.error);
      }
    } catch (error) {
      console.error("Error skipping legal review:", error);
      toast.error("법무검토 Skip 처리 중 오류가 발생했습니다.");
    } finally {
      setSyncLoading(prev => ({ ...prev, legalSkip: false }));
    }
  };

  // 등록요청 핸들러 - Step 1: 정보 입력
  const handleRegistrationRequest = () => {
    const approvalReadyRows = selectedRows.filter(row => row.status === "approval_ready");
    
    if (approvalReadyRows.length === 0) {
      toast.error("조건충족 상태의 벤더를 선택해주세요.");
      return;
    }
    
    if (approvalReadyRows.length > 1) {
      toast.error("정규업체 등록 요청은 한 번에 하나씩만 가능합니다.");
      return;
    }

    setRegistrationRequestDialog({
      open: true,
      registration: approvalReadyRows[0],
    });
  };

  // 등록요청 정보 입력 완료 - Step 1에서 Step 2로 전환
  const handleRegistrationRequestSubmit = async (requestData: RegistrationRequestData) => {
    if (!registrationRequestDialog.registration || !session?.user) return;

    try {
      // 폼 데이터 저장
      setRegistrationFormData(requestData);

      // 결재 템플릿 변수 생성 (vendorId 포함)
      const requestedAt = new Date();
      const variables = await mapRegistrationToTemplateVariables({
        requestData,
        requestedAt,
        vendorId: registrationRequestDialog.registration.vendorId, // vendors 테이블에서 추가 정보 가져오기
      });

      setApprovalVariables(variables);

      // RegistrationRequestDialog 닫고 ApprovalPreviewDialog 열기
      setRegistrationRequestDialog({ open: false, registration: null });
      setApprovalDialog({
        open: true,
        registration: registrationRequestDialog.registration,
      });
    } catch (error) {
      console.error("결재 준비 중 오류 발생:", error);
      toast.error("결재 준비 중 오류가 발생했습니다.");
    }
  };

  // 결재 상신 - Step 2: 결재선 선택 후 최종 상신
  const handleApprovalSubmit = async ({ approvers, title, attachments }: { approvers: string[], title: string, attachments?: File[] }) => {
    if (!approvalDialog.registration || !registrationFormData || !session?.user) {
      toast.error("세션 정보가 없습니다.");
      return;
    }

    setSyncLoading(prev => ({ ...prev, registrationRequest: true }));
    try {
      // 결재 워크플로우 시작 (approvers는 이미 EP ID 배열)
      const result = await registerVendorWithApproval({
        registrationId: approvalDialog.registration.id,
        requestData: registrationFormData,
        vendorId: approvalDialog.registration.vendorId, // vendors 테이블에서 정보를 가져오기 위한 vendorId
        currentUser: {
          id: Number(session.user.id),
          epId: session.user.epId || null,
          email: session.user.email || undefined,
        },
        approvers: approvers,
        attachments: attachments, // 첨부파일 전달
        title: title, // 미리보기에서 수정한 제목 전달
      });

      if (result.status === 'pending_approval') {
        // 성공 시에만 상태 초기화 및 페이지 리로드
        setRegistrationFormData(null);
        setApprovalVariables({});
        setApprovalDialog({ open: false, registration: null });
        toast.success("정규업체 등록 결재가 상신되었습니다.");
        router.refresh();
      }
    } catch (error) {
      console.error("결재 상신 중 오류:", error);
      toast.error("결재 상신 중 오류가 발생했습니다.");
    } finally {
      setSyncLoading(prev => ({ ...prev, registrationRequest: false }));
    }
  };

  // CP검토 상태인 선택된 행들 개수
  const cpReviewCount = selectedRows.filter(row => row.status === "cp_review").length;
  
  // 조건충족 상태인 선택된 행들 개수
  const approvalReadyCount = selectedRows.filter(row => row.status === "approval_ready").length;

  return (
    <div className="flex items-center gap-2">
      <Button
        variant="outline"
        size="sm"
        onClick={handleSendMissingContractRequest}
        disabled={syncLoading.missingContract || selectedRows.length === 0}
      >
        <FileWarning className="mr-2 h-4 w-4" />
        {syncLoading.missingContract ? "발송 중..." : "누락계약요청"}
      </Button>

      <Button
        variant="outline"
        size="sm"
        onClick={handleSendAdditionalInfoRequest}
        disabled={syncLoading.additionalInfo || selectedRows.length === 0}
      >
        <Mail className="mr-2 h-4 w-4" />
        {syncLoading.additionalInfo ? "발송 중..." : "추가정보요청"}
      </Button>

      <Button
        variant="outline"
        size="sm"
        onClick={() => setSkipDialogs(prev => ({ ...prev, legalReview: true }))}
        disabled={syncLoading.legalSkip || cpReviewCount === 0}
      >
        <Scale className="mr-2 h-4 w-4" />
        {syncLoading.legalSkip ? "처리 중..." : "GTC Skip"}
      </Button>

      <Button
        variant="default"
        size="sm"
        onClick={handleRegistrationRequest}
        disabled={syncLoading.registrationRequest || approvalReadyCount === 0}
      >
        <FileText className="mr-2 h-4 w-4" />
        {syncLoading.registrationRequest ? "처리 중..." : "등록요청"}
      </Button>

      <SkipReasonDialog
        open={skipDialogs.legalReview}
        onOpenChange={(open) => setSkipDialogs(prev => ({ ...prev, legalReview: open }))}
        title="GTC Skip"
        description={`선택된 ${cpReviewCount}개 업체의 GTC를 Skip하고 CP완료 상태로 변경합니다. Skip 사유를 입력해주세요.`}
        onConfirm={handleLegalReviewSkip}
        loading={syncLoading.legalSkip}
      />

      <RegistrationRequestDialog
        open={registrationRequestDialog.open}
        onOpenChange={(open) => setRegistrationRequestDialog(prev => ({ ...prev, open }))}
        registration={registrationRequestDialog.registration}
        onSubmit={handleRegistrationRequestSubmit}
      />

      {/* 결재 미리보기 Dialog - 정규업체 등록 */}
      {session?.user && session.user.epId && approvalDialog.registration && (
        <ApprovalPreviewDialog
          open={approvalDialog.open}
          onOpenChange={(open) => {
            setApprovalDialog(prev => ({ ...prev, open }));
            if (!open) {
              // 다이얼로그가 닫히면 폼 데이터도 초기화
              setRegistrationFormData(null);
              setApprovalVariables({});
            }
          }}
          templateName="정규업체 등록"
          variables={approvalVariables}
          title={`정규업체 등록 - ${approvalDialog.registration.companyName}`}
          currentUser={{
            id: Number(session.user.id),
            epId: session.user.epId,
            name: session.user.name || undefined,
            email: session.user.email || undefined,
          }}
          onConfirm={handleApprovalSubmit}
          enableAttachments={true}
          maxAttachments={10}
          maxFileSize={100 * 1024 * 1024} // 100MB
        />
      )}
    </div>
  )
}