import useSWR from 'swr'

interface UploadTemplateDto {
  id: string
  name: string
  description: string | null
  status: string
  materialType: string
  materialKind?: string
  version: number
  fieldGroups: any
  displayConfig: any
  createdAt: string
  updatedAt: string
  fields: any[]
}

const fetcher = async (url: string) => {
  const res = await fetch(url)
  if (!res.ok) {
    const error: any = new Error('获取模板列表失败')
    error.status = res.status
    throw error
  }
  return res.json()
}

/**
 * 使用SWR缓存模板列表
 * @param shouldFetch 是否应该获取数据（默认true）
 * @returns SWR返回对象
 */
export function useTemplates(shouldFetch: boolean = true) {
  const { data, error, isLoading, mutate } = useSWR<UploadTemplateDto[]>(
    shouldFetch ? '/api/admin/upload-templates' : null,
    fetcher,
    {
      // 缓存配置
      revalidateOnFocus: false, // 窗口聚焦时不重新验证
      revalidateOnReconnect: true, // 重新连接时重新验证
      dedupingInterval: 5000, // 5秒内的重复请求会被去重
      // 错误重试配置
      errorRetryCount: 3,
      errorRetryInterval: 1000,
    }
  )

  return {
    templates: data,
    isLoading,
    isError: error,
    mutate, // 用于手动刷新数据
  }
}

/**
 * 使用SWR缓存单个模板详情
 * @param templateId 模板ID
 * @param shouldFetch 是否应该获取数据（默认true）
 * @returns SWR返回对象
 */
export function useTemplate(templateId: string | null, shouldFetch: boolean = true) {
  const { data, error, isLoading, mutate } = useSWR<UploadTemplateDto>(
    shouldFetch && templateId ? `/api/admin/upload-templates/${templateId}` : null,
    fetcher,
    {
      revalidateOnFocus: false,
      revalidateOnReconnect: true,
      dedupingInterval: 5000,
      errorRetryCount: 3,
      errorRetryInterval: 1000,
    }
  )

  return {
    template: data,
    isLoading,
    isError: error,
    mutate,
  }
}