"use client"

import * as React from "react"
import { type Table } from "@tanstack/react-table"
import { 
  Plus, 
  Check, 
  MessageSquare, 
  X, 
  Download,
  Upload,
  RefreshCw,
  Settings,
  Trash2
} from "lucide-react"
import { toast } from "sonner"
import { useRouter } from "next/navigation"
import { useSession } from "next-auth/react"

import { Button } from "@/components/ui/button"
import {
  DropdownMenu,
  DropdownMenuContent,
  DropdownMenuItem,
  DropdownMenuSeparator,
  DropdownMenuTrigger,
} from "@/components/ui/dropdown-menu"
import { ManualCreateEvaluationTargetDialog } from "./manual-create-evaluation-target-dialog"
import { 
  ConfirmTargetsDialog,
  ExcludeTargetsDialog,
  RequestReviewDialog
} from "./evaluation-target-action-dialogs"
import { DeleteTargetsDialog } from "./delete-targets-dialog"
import { EvaluationTargetWithDepartments } from "@/db/schema"
import { exportTableToExcel } from "@/lib/export"
import { autoGenerateEvaluationTargets } from "../service" // 서버 액션 import
import { useAuthRole } from "@/hooks/use-auth-role"

interface EvaluationTargetsTableToolbarActionsProps {
  table: Table<EvaluationTargetWithDepartments>
  onRefresh?: () => void
}

export function EvaluationTargetsTableToolbarActions({ 
  table, 
  onRefresh 
}: EvaluationTargetsTableToolbarActionsProps) {
  const [isLoading, setIsLoading] = React.useState(false)
  const [manualCreateDialogOpen, setManualCreateDialogOpen] = React.useState(false)
  const [confirmDialogOpen, setConfirmDialogOpen] = React.useState(false)
  const [excludeDialogOpen, setExcludeDialogOpen] = React.useState(false)
  const [reviewDialogOpen, setReviewDialogOpen] = React.useState(false)
  const [deleteDialogOpen, setDeleteDialogOpen] = React.useState(false)
  const router = useRouter()
  const { data: session } = useSession()

  // 권한 체크
  const { hasRole, isLoading: roleLoading } = useAuthRole()
  const canManageEvaluations = hasRole('정기평가') || hasRole('admin')

  // 사용자 ID 가져오기
  const userId = React.useMemo(() => {
    return session?.user?.id ? Number(session.user.id) : 1;
  }, [session]);

  // 선택된 행들
  const selectedRows = table.getFilteredSelectedRowModel().rows
  const hasSelection = selectedRows.length > 0

  // ✅ selectedTargets를 useMemo로 안정화 (VendorsTable 방식과 동일)
  const selectedTargets = React.useMemo(() => {
    return selectedRows.map(row => row.original)
  }, [selectedRows])

  // ✅ 각 상태별 타겟들을 개별적으로 메모이제이션 (VendorsTable 방식과 동일)
  const pendingTargets = React.useMemo(() => {
    return table
      .getFilteredSelectedRowModel()
      .rows
      .map(row => row.original)
      .filter(t => t.status === "PENDING");
  }, [table.getFilteredSelectedRowModel().rows]);

  const confirmedTargets = React.useMemo(() => {
    return table
      .getFilteredSelectedRowModel()
      .rows
      .map(row => row.original)
      .filter(t => t.status === "CONFIRMED");
  }, [table.getFilteredSelectedRowModel().rows]);

  const excludedTargets = React.useMemo(() => {
    return table
      .getFilteredSelectedRowModel()
      .rows
      .map(row => row.original)
      .filter(t => t.status === "EXCLUDED");
  }, [table.getFilteredSelectedRowModel().rows]);

  const consensusTrueTargets = React.useMemo(() => {
    return table
      .getFilteredSelectedRowModel()
      .rows
      .map(row => row.original)
      .filter(t => t.consensusStatus === true);
  }, [table.getFilteredSelectedRowModel().rows]);

  const consensusFalseTargets = React.useMemo(() => {
    return table
      .getFilteredSelectedRowModel()
      .rows
      .map(row => row.original)
      .filter(t => t.consensusStatus === false);
  }, [table.getFilteredSelectedRowModel().rows]);

  const consensusNullTargets = React.useMemo(() => {
    return table
      .getFilteredSelectedRowModel()
      .rows
      .map(row => row.original)
      .filter(t => t.consensusStatus === null);
  }, [table.getFilteredSelectedRowModel().rows]);

  // ✅ 선택된 항목들의 상태 분석 - 안정화된 개별 배열들 사용
  const selectedStats = React.useMemo(() => {
    const pending = pendingTargets.length
    const confirmed = confirmedTargets.length
    const excluded = excludedTargets.length
    const consensusTrue = consensusTrueTargets.length
    const consensusFalse = consensusFalseTargets.length
    const consensusNull = consensusNullTargets.length

    return {
      pending,
      confirmed,
      excluded,
      consensusTrue,
      consensusFalse,
      consensusNull,
      canConfirm: pending > 0 && consensusTrue > 0,
      canExclude: pending > 0,
      canRequestReview: pending > 0,
      canDelete: pending > 0 // 삭제는 PENDING 상태인 것만 가능
    }
  }, [
    pendingTargets.length,
    confirmedTargets.length,
    excludedTargets.length,
    consensusTrueTargets.length,
    consensusFalseTargets.length,
    consensusNullTargets.length
  ])

  // ----------------------------------------------------------------
  // 신규 평가 대상 생성 (자동)
  // ----------------------------------------------------------------
  const handleAutoGenerate = React.useCallback(async () => {
    setIsLoading(true)
    try {
      // 현재 년도를 기준으로 평가 대상 자동 생성
      const currentYear = new Date().getFullYear()
      const result = await autoGenerateEvaluationTargets(currentYear, userId)
      
      if (result.success) {
        if (result.generatedCount === 0) {
          toast.info(result.message, {
            description: result.skippedCount 
              ? `이미 존재하는 평가 대상: ${result.skippedCount}개`
              : undefined
          })
        } else {
          toast.success(result.message, {
            description: result.details 
              ? `해양: ${result.details.shipTargets}개, 조선: ${result.details.plantTargets}개 생성${result.details.duplicateSkipped > 0 ? `, 중복 건너뜀: ${result.details.duplicateSkipped}개` : ''}`
              : undefined
          })
        }
        onRefresh?.()
        router.refresh()
      } else {
        toast.error(result.error || "자동 생성 중 오류가 발생했습니다.")
      }
    } catch (error) {
      console.error('Error auto generating targets:', error)
      toast.error("자동 생성 중 오류가 발생했습니다.")
    } finally {
      setIsLoading(false)
    }
  }, [router, onRefresh, userId])

  // ----------------------------------------------------------------
  // 신규 평가 대상 생성 (수동)
  // ----------------------------------------------------------------
  const handleManualCreate = React.useCallback(() => {
    setManualCreateDialogOpen(true)
  }, [])

  // ----------------------------------------------------------------
  // 다이얼로그 성공 핸들러
  // ----------------------------------------------------------------
  const handleActionSuccess = React.useCallback(() => {
    table.resetRowSelection()
    onRefresh?.()
    router.refresh()
  }, [table, onRefresh, router])

  // ----------------------------------------------------------------
  // 내보내기 핸들러
  // ----------------------------------------------------------------
  const handleExport = React.useCallback(() => {
    exportTableToExcel(table, {
      filename: "vendor-target-list",
      excludeColumns: ["select", "actions"],
    })
  }, [table])

  // 권한이 없거나 로딩 중인 경우 내보내기 버튼만 표시
  if (roleLoading) {
    return (
      <div className="flex items-center gap-2">
        <div className="flex items-center gap-1 border-l pl-2 ml-2">
          <Button
            variant="outline"
            size="sm"
            disabled
            className="gap-2"
          >
            <Download className="size-4 animate-spin" aria-hidden="true" />
            <span className="hidden sm:inline">로딩중...</span>
          </Button>
        </div>
      </div>
    )
  }

  return (
    <>
      <div className="flex items-center gap-2">
        {/* 신규 생성 드롭다운 - 정기평가 권한이 있는 경우만 표시 */}
        {canManageEvaluations && (
          <DropdownMenu>
            <DropdownMenuTrigger asChild>
              <Button
                variant="default"
                size="sm"
                className="gap-2"
                disabled={isLoading}
              >
                <Plus className="size-4" aria-hidden="true" />
                <span className="hidden sm:inline">신규 생성</span>
              </Button>
            </DropdownMenuTrigger>
            <DropdownMenuContent align="start">
              <DropdownMenuItem onClick={handleAutoGenerate} disabled={isLoading}>
                <RefreshCw className={`size-4 mr-2 ${isLoading ? 'animate-spin' : ''}`} />
                자동 생성 (발주실적 기반)
              </DropdownMenuItem>
              <DropdownMenuItem onClick={handleManualCreate}>
                <Plus className="size-4 mr-2" />
                수동 생성
              </DropdownMenuItem>
            </DropdownMenuContent>
          </DropdownMenu>
        )}

        {/* 유틸리티 버튼들 */}
        <div className="flex items-center gap-1 border-l pl-2 ml-2">
          <Button
            variant="outline"
            size="sm"
            onClick={handleExport}
            className="gap-2"
          >
            <Download className="size-4" aria-hidden="true" />
            <span className="hidden sm:inline">내보내기</span>
          </Button>
        </div>

        {/* 선택된 항목 액션 버튼들 - 정기평가 권한이 있는 경우만 표시 */}
        {canManageEvaluations && hasSelection && (
          <div className="flex items-center gap-1 border-l pl-2 ml-2">
            {/* 확정 버튼 */}
            {selectedStats.canConfirm && (
              <Button
                variant="success"
                size="sm"
                className="gap-2"
                onClick={() => setConfirmDialogOpen(true)}
                disabled={isLoading}
              >
                <Check className="size-4" aria-hidden="true" />
                <span className="hidden sm:inline">
                  확정 ({selectedStats.consensusTrue})
                </span>
              </Button>
            )}

            {/* 제외 버튼 */}
            {selectedStats.canExclude && (
              <Button
                variant="destructive"
                size="sm"
                className="gap-2"
                onClick={() => setExcludeDialogOpen(true)}
                disabled={isLoading}
              >
                <X className="size-4" aria-hidden="true" />
                <span className="hidden sm:inline">
                  제외 ({selectedStats.pending})
                </span>
              </Button>
            )}

            {/* 삭제 버튼 */}
            {selectedStats.canDelete && (
              <Button
                variant="destructive"
                size="sm"
                className="gap-2"
                onClick={() => setDeleteDialogOpen(true)}
                disabled={isLoading}
              >
                <Trash2 className="size-4" aria-hidden="true" />
                <span className="hidden sm:inline">
                  삭제 ({selectedStats.pending})
                </span>
              </Button>
            )}

            {/* 의견 요청 버튼 */}
            {selectedStats.canRequestReview && (
              <Button
                variant="outline"
                size="sm"
                className="gap-2"
                onClick={() => setReviewDialogOpen(true)}
                disabled={isLoading}
              >
                <MessageSquare className="size-4" aria-hidden="true" />
                <span className="hidden sm:inline">
                  의견 요청 ({selectedStats.pending})
                </span>
              </Button>
            )}
          </div>
        )}

        {/* 권한이 없는 경우 안내 메시지 (선택사항) */}
        {!canManageEvaluations && hasSelection && (
          <div className="flex items-center gap-1 border-l pl-2 ml-2">
            <div className="text-xs text-muted-foreground px-2 py-1">
              평가 관리 권한이 필요합니다
            </div>
          </div>
        )}
      </div>

      {/* 다이얼로그들 - 권한이 있는 경우만 렌더링 */}
      {canManageEvaluations && (
        <>
          {/* 수동 생성 다이얼로그 */}
          <ManualCreateEvaluationTargetDialog
            open={manualCreateDialogOpen}
            onOpenChange={setManualCreateDialogOpen}
            onSuccess={handleActionSuccess}
          />

          {/* 확정 컨펌 다이얼로그 */}
          <ConfirmTargetsDialog
            open={confirmDialogOpen}
            onOpenChange={setConfirmDialogOpen}
            targets={selectedTargets}
            onSuccess={handleActionSuccess}
          />

          {/* 제외 컨펌 다이얼로그 */}
          <ExcludeTargetsDialog
            open={excludeDialogOpen}
            onOpenChange={setExcludeDialogOpen}
            targets={selectedTargets}
            onSuccess={handleActionSuccess}
          />

          {/* 의견 요청 다이얼로그 */}
          <RequestReviewDialog
            open={reviewDialogOpen}
            onOpenChange={setReviewDialogOpen}
            targets={selectedTargets}
            onSuccess={handleActionSuccess}
          />

          {/* 삭제 컨펌 다이얼로그 */}
          <DeleteTargetsDialog
            open={deleteDialogOpen}
            onOpenChange={setDeleteDialogOpen}
            targets={pendingTargets} // PENDING 상태인 타겟들만 전달
            onSuccess={handleActionSuccess}
          />
        </>
      )}
    </>
  )
}