// 定义后端服务URL和OAuth2配置
const _api_base_url = process.env.NEXT_PUBLIC_API_BASE_URL
if (!_api_base_url) throw new Error('NEXT_PUBLIC_API_BASE_URL is not set')
const API_BASE_URL = _api_base_url

const _client_id = process.env.CLIENT_ID
if (!_client_id) throw new Error('CLIENT_ID is not set')
const CLIENT_ID = _client_id

const _client_secret = process.env.CLIENT_SECRET
if (!_client_secret) throw new Error('CLIENT_SECRET is not set')
const CLIENT_SECRET = _client_secret

// 统一的API响应类型
type ApiResponse<T = undefined> = {
  success: false
  status: number
  message: string
} | {
  success: true
  data: T
}

type PageRecord<T = unknown> = {
  total: number
  page: number
  size: number
  list: T[]
}

type ExtraReq<T extends (...args: never) => unknown> = T extends (...args: infer P) => unknown ? P[0] : never
type ExtraResp<T extends (...args: never) => unknown> = Awaited<ReturnType<T>> extends ApiResponse<infer D> ? D : never

// 预定义错误
const UnauthorizedError = new Error('未授权访问')

export {
  API_BASE_URL,
  CLIENT_ID,
  CLIENT_SECRET,
  type ApiResponse,
  type PageRecord,
  type ExtraReq,
  type ExtraResp,
  UnauthorizedError,
}