'use client'

import { useState, useRef, useEffect } from 'react'
import { Button } from '@/components/ui/button'
import { Input } from '@/components/ui/input'
import { Label } from '@/components/ui/label'
import { Textarea } from '@/components/ui/textarea'
import {
  Dialog,
  DialogContent,
  DialogDescription,
  DialogFooter,
  DialogHeader,
  DialogTitle,
} from '@/components/ui/dialog'
import { Spinner } from '@/components/ui/spinner'
import { Level, LevelFormData } from '@/types'
import { ImageUploader } from './image-uploader'
import { Upload } from 'lucide-react'

interface LevelDialogProps {
  open: boolean
  onOpenChange: (open: boolean) => void
  level?: Level | null
  onSubmit: (data: LevelFormData) => Promise<void>
}

const defaultFormData: LevelFormData = {
  imageUrl: '',
  answer: '',
  hint1: '',
  hint2: '',
  hint3: '',
}

export function LevelDialog({ open, onOpenChange, level, onSubmit }: LevelDialogProps) {
  const [formData, setFormData] = useState<LevelFormData>(defaultFormData)
  const [isLoading, setIsLoading] = useState(false)
  const [error, setError] = useState('')
  const fileInputRef = useRef<HTMLInputElement>(null)

  // Reset form when dialog opens/closes or level changes
  useEffect(() => {
    if (open) {
      if (level) {
        setFormData({
          imageUrl: level.imageUrl,
          answer: level.answer,
          hint1: level.hint1 || '',
          hint2: level.hint2 || '',
          hint3: level.hint3 || '',
        })
      } else {
        setFormData(defaultFormData)
      }
      setError('')
    }
  }, [open, level])

  const handleImageUpload = (url: string) => {
    setFormData((prev) => ({ ...prev, imageUrl: url }))
  }

  const handleSubmit = async (e: React.FormEvent) => {
    e.preventDefault()
    setError('')

    if (!formData.imageUrl) {
      setError('请上传关卡图片')
      return
    }

    if (!formData.answer.trim()) {
      setError('请输入答案')
      return
    }

    setIsLoading(true)
    try {
      await onSubmit(formData)
      onOpenChange(false)
    } catch (err) {
      setError(err instanceof Error ? err.message : '操作失败，请稍后重试')
    } finally {
      setIsLoading(false)
    }
  }

  return (
    <Dialog open={open} onOpenChange={onOpenChange}>
      <DialogContent className="sm:max-w-[500px]">
        <DialogHeader>
          <DialogTitle>{level ? '编辑关卡' : '添加关卡'}</DialogTitle>
          <DialogDescription>
            {level ? '修改关卡信息' : '创建新的关卡'}
          </DialogDescription>
        </DialogHeader>
        <form onSubmit={handleSubmit} className="space-y-4">
          {error && (
            <div className="p-3 text-sm text-red-600 bg-red-50 border border-red-200 rounded-md">
              {error}
            </div>
          )}

          <div className="space-y-2">
            <Label>关卡图片 *</Label>
            <ImageUploader
              value={formData.imageUrl}
              onChange={handleImageUpload}
            />
          </div>

          <div className="space-y-2">
            <Label htmlFor="answer">答案 *</Label>
            <Input
              id="answer"
              value={formData.answer}
              onChange={(e) =>
                setFormData((prev) => ({ ...prev, answer: e.target.value }))
              }
              placeholder="请输入答案"
              required
            />
          </div>

          <div className="space-y-2">
            <Label htmlFor="hint1">提示1 (可选)</Label>
            <Input
              id="hint1"
              value={formData.hint1}
              onChange={(e) =>
                setFormData((prev) => ({ ...prev, hint1: e.target.value }))
              }
              placeholder="请输入提示1"
            />
          </div>

          <div className="space-y-2">
            <Label htmlFor="hint2">提示2 (可选)</Label>
            <Input
              id="hint2"
              value={formData.hint2}
              onChange={(e) =>
                setFormData((prev) => ({ ...prev, hint2: e.target.value }))
              }
              placeholder="请输入提示2"
            />
          </div>

          <div className="space-y-2">
            <Label htmlFor="hint3">提示3 (可选)</Label>
            <Input
              id="hint3"
              value={formData.hint3}
              onChange={(e) =>
                setFormData((prev) => ({ ...prev, hint3: e.target.value }))
              }
              placeholder="请输入提示3"
            />
          </div>

          <DialogFooter>
            <Button
              type="button"
              variant="outline"
              onClick={() => onOpenChange(false)}
              disabled={isLoading}
            >
              取消
            </Button>
            <Button type="submit" disabled={isLoading}>
              {isLoading ? (
                <>
                  <Spinner size="sm" className="mr-2" />
                  保存中...
                </>
              ) : (
                '保存'
              )}
            </Button>
          </DialogFooter>
        </form>
      </DialogContent>
    </Dialog>
  )
}