// components/sync/send-to-shi-button.tsx (최종 버전)
"use client"

import * as React from "react"
import { Send, Loader2, CheckCircle, AlertTriangle, Settings } from "lucide-react"
import { toast } from "sonner"

import { Button } from "@/components/ui/button"
import {
  Dialog,
  DialogContent,
  DialogDescription,
  DialogHeader,
  DialogTitle,
} from "@/components/ui/dialog"
import {
  Popover,
  PopoverContent,
  PopoverTrigger,
} from "@/components/ui/popover"
import { Badge } from "@/components/ui/badge"
import { Progress } from "@/components/ui/progress"
import { Separator } from "@/components/ui/separator"
import { useSyncStatus, useTriggerSync } from "@/hooks/use-sync-status"
import type { EnhancedDocument } from "@/types/enhanced-documents"

interface SendToSHIButtonProps {
  contractId: number
  documents?: EnhancedDocument[]
  onSyncComplete?: () => void
}

export function SendToSHIButton({ 
  contractId, 
  documents = [], 
  onSyncComplete 
}: SendToSHIButtonProps) {
  const [isDialogOpen, setIsDialogOpen] = React.useState(false)
  const [syncProgress, setSyncProgress] = React.useState(0)
  
  const { 
    syncStatus, 
    isLoading: statusLoading, 
    error: statusError,
    refetch: refetchStatus 
  } = useSyncStatus(contractId, 'SHI')

  const { 
    triggerSync, 
    isLoading: isSyncing, 
    error: syncError 
  } = useTriggerSync()

  // 에러 상태 표시
  React.useEffect(() => {
    if (statusError) {
      console.warn('Failed to load sync status:', statusError)
    }
  }, [statusError])

  const handleSync = async () => {
    if (!contractId) return
    
    setSyncProgress(0)
    
    try {
      // 진행률 시뮬레이션
      const progressInterval = setInterval(() => {
        setSyncProgress(prev => Math.min(prev + 10, 90))
      }, 200)

      const result = await triggerSync({ 
        contractId, 
        targetSystem: 'SHI' 
      })
      
      clearInterval(progressInterval)
      setSyncProgress(100)
      
      setTimeout(() => {
        setSyncProgress(0)
        setIsDialogOpen(false)
        
        if (result?.success) {
          toast.success(
            `동기화 완료: ${result.successCount || 0}건 성공`,
            {
              description: result.successCount > 0 
                ? `${result.successCount}개 항목이 SHI 시스템으로 전송되었습니다.`
                : '전송할 새로운 변경사항이 없습니다.'
            }
          )
        } else {
          toast.error(
            `동기화 부분 실패: ${result?.successCount || 0}건 성공, ${result?.failureCount || 0}건 실패`,
            {
              description: result?.errors?.[0] || '일부 항목 전송에 실패했습니다.'
            }
          )
        }
        
        refetchStatus() // SWR 캐시 갱신
        onSyncComplete?.()
      }, 500)
      
    } catch (error) {
      setSyncProgress(0)
      
      toast.error('동기화 실패', {
        description: error instanceof Error ? error.message : '알 수 없는 오류가 발생했습니다.'
      })
    }
  }

  const getSyncStatusBadge = () => {
    if (statusLoading) {
      return <Badge variant="secondary">확인 중...</Badge>
    }

    if (statusError) {
      return <Badge variant="destructive">오류</Badge>
    }

    if (!syncStatus) {
      return <Badge variant="secondary">데이터 없음</Badge>
    }

    if (syncStatus.pendingChanges > 0) {
      return (
        <Badge variant="destructive" className="gap-1">
          <AlertTriangle className="w-3 h-3" />
          {syncStatus.pendingChanges}건 대기
        </Badge>
      )
    }

    if (syncStatus.syncedChanges > 0) {
      return (
        <Badge variant="default" className="gap-1 bg-green-500 hover:bg-green-600">
          <CheckCircle className="w-3 h-3" />
          동기화됨
        </Badge>
      )
    }

    return <Badge variant="secondary">변경사항 없음</Badge>
  }

  const canSync = !statusError && syncStatus?.syncEnabled && syncStatus?.pendingChanges > 0

  return (
    <>
      <Popover>
        <PopoverTrigger asChild>
          <Button
            variant="default"
            size="sm"
            className="gap-2 relative bg-blue-600 hover:bg-blue-700"
            disabled={isSyncing || statusLoading}
          >
            {isSyncing ? (
              <Loader2 className="w-4 h-4 animate-spin" />
            ) : (
              <Send className="w-4 h-4" />
            )}
            <span className="hidden sm:inline">Send to SHI</span>
            {syncStatus?.pendingChanges > 0 && (
              <Badge 
                variant="destructive" 
                className="absolute -top-2 -right-2 h-5 w-5 p-0 text-xs flex items-center justify-center"
              >
                {syncStatus.pendingChanges}
              </Badge>
            )}
          </Button>
        </PopoverTrigger>
        
        <PopoverContent className="w-80">
          <div className="space-y-4">
            <div className="space-y-2">
              <h4 className="font-medium">SHI 동기화 상태</h4>
              <div className="flex items-center justify-between">
                <span className="text-sm text-muted-foreground">현재 상태</span>
                {getSyncStatusBadge()}
              </div>
            </div>

            {syncStatus && !statusError && (
              <div className="space-y-3">
                <Separator />
                
                <div className="grid grid-cols-2 gap-4 text-sm">
                  <div>
                    <div className="text-muted-foreground">대기 중</div>
                    <div className="font-medium">{syncStatus.pendingChanges || 0}건</div>
                  </div>
                  <div>
                    <div className="text-muted-foreground">동기화됨</div>
                    <div className="font-medium">{syncStatus.syncedChanges || 0}건</div>
                  </div>
                </div>

                {syncStatus.failedChanges > 0 && (
                  <div className="text-sm">
                    <div className="text-muted-foreground">실패</div>
                    <div className="font-medium text-red-600">{syncStatus.failedChanges}건</div>
                  </div>
                )}

                {syncStatus.lastSyncAt && (
                  <div className="text-sm">
                    <div className="text-muted-foreground">마지막 동기화</div>
                    <div className="font-medium">
                      {new Date(syncStatus.lastSyncAt).toLocaleString()}
                    </div>
                  </div>
                )}
              </div>
            )}

            {statusError && (
              <div className="space-y-2">
                <Separator />
                <div className="text-sm text-red-600">
                  <div className="font-medium">연결 오류</div>
                  <div className="text-xs">동기화 상태를 확인할 수 없습니다.</div>
                </div>
              </div>
            )}

            <Separator />

            <div className="flex gap-2">
              <Button
                onClick={() => setIsDialogOpen(true)}
                disabled={!canSync || isSyncing}
                className="flex-1"
                size="sm"
              >
                {isSyncing ? (
                  <>
                    <Loader2 className="w-4 h-4 mr-2 animate-spin" />
                    동기화 중...
                  </>
                ) : (
                  <>
                    <Send className="w-4 h-4 mr-2" />
                    지금 동기화
                  </>
                )}
              </Button>
              
              <Button
                variant="outline"
                size="sm"
                onClick={() => refetchStatus()}
                disabled={statusLoading}
              >
                {statusLoading ? (
                  <Loader2 className="w-4 h-4 animate-spin" />
                ) : (
                  <Settings className="w-4 h-4" />
                )}
              </Button>
            </div>
          </div>
        </PopoverContent>
      </Popover>

      {/* 동기화 진행 다이얼로그 */}
      <Dialog open={isDialogOpen} onOpenChange={setIsDialogOpen}>
        <DialogContent className="sm:max-w-md">
          <DialogHeader>
            <DialogTitle>SHI 시스템으로 동기화</DialogTitle>
            <DialogDescription>
              변경된 문서 데이터를 SHI 시스템으로 전송합니다.
            </DialogDescription>
          </DialogHeader>

          <div className="space-y-4">
            {syncStatus && !statusError && (
              <div className="rounded-lg border p-4 space-y-3">
                <div className="flex items-center justify-between text-sm">
                  <span>전송 대상</span>
                  <span className="font-medium">{syncStatus.pendingChanges || 0}건</span>
                </div>
                
                <div className="text-xs text-muted-foreground">
                  문서, 리비전, 첨부파일의 변경사항이 포함됩니다.
                </div>

                {isSyncing && (
                  <div className="space-y-2">
                    <div className="flex items-center justify-between text-sm">
                      <span>진행률</span>
                      <span>{syncProgress}%</span>
                    </div>
                    <Progress value={syncProgress} className="h-2" />
                  </div>
                )}
              </div>
            )}

            {statusError && (
              <div className="rounded-lg border border-red-200 p-4">
                <div className="text-sm text-red-600">
                  동기화 상태를 확인할 수 없습니다. 네트워크 연결을 확인해주세요.
                </div>
              </div>
            )}

            <div className="flex justify-end gap-2">
              <Button
                variant="outline"
                onClick={() => setIsDialogOpen(false)}
                disabled={isSyncing}
              >
                취소
              </Button>
              <Button
                onClick={handleSync}
                disabled={isSyncing || !canSync}
              >
                {isSyncing ? (
                  <>
                    <Loader2 className="w-4 h-4 mr-2 animate-spin" />
                    동기화 중...
                  </>
                ) : (
                  <>
                    <Send className="w-4 h-4 mr-2" />
                    동기화 시작
                  </>
                )}
              </Button>
            </div>
          </div>
        </DialogContent>
      </Dialog>
    </>
  )
}