"use client"

import * as React from "react"
import { useForm } from "react-hook-form"
import { zodResolver } from "@hookform/resolvers/zod"
import { z } from "zod"
import { Upload } from "lucide-react"
import { toast } from "sonner"
import {
  Dialog,
  DialogContent,
  DialogDescription,
  DialogFooter,
  DialogHeader,
  DialogTitle,
} from "@/components/ui/dialog"
import {
  Form,
  FormControl,
  FormField,
  FormItem,
  FormLabel,
  FormMessage,
} from "@/components/ui/form"
import { Button } from "@/components/ui/button"
import { Textarea } from "@/components/ui/textarea"
import { Input } from "@/components/ui/input"
import { Progress } from "@/components/ui/progress"

const updateRevisionSchema = z.object({
  revisionComment: z.string().min(1, "리비전 설명을 입력해주세요"),
  file: z.instanceof(File, {
    message: "새 버전 파일을 선택해주세요",
  }).refine((file) => file.size <= 100 * 1024 * 1024, {
    message: "파일 크기는 100MB를 초과할 수 없습니다.",
  }),
})

type UpdateRevisionFormData = z.infer<typeof updateRevisionSchema>

interface UpdateRevisionDialogProps {
  open: boolean;
  onOpenChange: (open: boolean) => void;
  attachment: {
    id: number;
    originalFileName?: string | null;
    currentRevision?: string | null;
  };
  onSuccess?: () => void;
}

export function UpdateRevisionDialog({
  open,
  onOpenChange,
  attachment,
  onSuccess,
}: UpdateRevisionDialogProps) {
  const [isSubmitting, setIsSubmitting] = React.useState(false)
  const [uploadProgress, setUploadProgress] = React.useState(0)

  const form = useForm<UpdateRevisionFormData>({
    resolver: zodResolver(updateRevisionSchema),
    defaultValues: {
      revisionComment: "",
    },
  })

  const onSubmit = async (data: UpdateRevisionFormData) => {
    setIsSubmitting(true);
    setUploadProgress(0);
    
    try {
      const formData = new FormData();
      formData.append("attachmentId", attachment.id.toString());
      formData.append("revisionComment", data.revisionComment);
      formData.append("file", data.file);

      // 진행률 시뮬레이션
      setUploadProgress(30);

      const response = await fetch("/api/rfq-attachments/revision", {
        method: "POST",
        body: formData,
      });

      setUploadProgress(70);

      if (!response.ok) {
        const error = await response.json();
        throw new Error(error.message || "리비전 업데이트 실패");
      }

      const result = await response.json();
      setUploadProgress(100);
      
      if (result.success) {
        toast.success(result.message);
        form.reset();
        onOpenChange(false);
        onSuccess?.();
      } else {
        toast.error(result.message);
      }
    } catch (error) {
      toast.error(error instanceof Error ? error.message : "파일 업로드 중 오류가 발생했습니다");
    } finally {
      setIsSubmitting(false);
      setUploadProgress(0);
    }
  }

  return (
    <Dialog open={open} onOpenChange={onOpenChange}>
      <DialogContent className="sm:max-w-[500px]">
        <DialogHeader>
          <DialogTitle>새 버전 업로드</DialogTitle>
          <DialogDescription>
            {attachment.originalFileName && (
              <div className="mt-2">
                <div className="text-sm font-medium">현재 파일:</div>
                <div className="text-sm text-muted-foreground">
                  {attachment.originalFileName} 
                  {attachment.currentRevision && ` (Rev. ${attachment.currentRevision})`}
                </div>
              </div>
            )}
          </DialogDescription>
        </DialogHeader>

        <Form {...form}>
          <form onSubmit={form.handleSubmit(onSubmit)} className="space-y-4">
            <FormField
              control={form.control}
              name="file"
              render={({ field: { onChange, value, ...field } }) => (
                <FormItem>
                  <FormLabel>새 버전 파일</FormLabel>
                  <FormControl>
                    <Input
                      type="file"
                      accept=".pdf,.doc,.docx,.xls,.xlsx,.ppt,.pptx,.zip,.rar,.dwg,.dxf"
                      onChange={(e) => {
                        const file = e.target.files?.[0];
                        if (file) {
                          onChange(file);
                          // 파일 크기 검증
                          if (file.size > 100 * 1024 * 1024) {
                            form.setError("file", {
                              message: "파일 크기는 100MB를 초과할 수 없습니다."
                            });
                          }
                        }
                      }}
                      disabled={isSubmitting}
                      {...field}
                    />
                  </FormControl>
                  {value && (
                    <p className="text-sm text-muted-foreground mt-1">
                      선택된 파일: {value.name} ({(value.size / 1024 / 1024).toFixed(2)}MB)
                    </p>
                  )}
                  <FormMessage />
                </FormItem>
              )}
            />

            <FormField
              control={form.control}
              name="revisionComment"
              render={({ field }) => (
                <FormItem>
                  <FormLabel>리비전 설명</FormLabel>
                  <FormControl>
                    <Textarea 
                      placeholder="변경사항을 설명해주세요"
                      className="resize-none"
                      rows={3}
                      disabled={isSubmitting}
                      {...field} 
                    />
                  </FormControl>
                  <FormMessage />
                </FormItem>
              )}
            />

            {isSubmitting && (
              <div className="space-y-2">
                <div className="flex justify-between text-sm">
                  <span>업로드 진행중...</span>
                  <span>{uploadProgress}%</span>
                </div>
                <Progress value={uploadProgress} />
              </div>
            )}

            <DialogFooter>
              <Button
                type="button"
                variant="outline"
                onClick={() => onOpenChange(false)}
                disabled={isSubmitting}
              >
                취소
              </Button>
              <Button type="submit" disabled={isSubmitting}>
                {isSubmitting ? "업로드 중..." : "업로드"}
              </Button>
            </DialogFooter>
          </form>
        </Form>
      </DialogContent>
    </Dialog>
  )
}