import axios, { AxiosError, type AxiosInstance, type AxiosRequestConfig } from 'axios'
import { Device, Language, type ApiRequest, type ApiResponse, type ErrorResponse } from '@/types/api'
import { useAuthStore } from '@/stores/auth'

// 根据环境选择基础地址
// Docker 开发环境：Vite proxy 会将 /api 转发到后端
// 生产环境：Nginx 代理 /api 到后端网关
const baseURL = import.meta.env.DEV ? '/' : '/api'

const client: AxiosInstance = axios.create({
  baseURL,
  timeout: 30000,
  headers: {
    'Content-Type': 'application/json',
  },
})

// 请求拦截器：注入 JWT
client.interceptors.request.use((config) => {
  const token = useAuthStore.getState().token
  if (token && config.headers) {
    config.headers.Authorization = `Bearer ${token}`
  }
  return config
})

// 响应拦截器：统一错误处理
client.interceptors.response.use(
  (response) => response,
  (error: AxiosError<ErrorResponse>) => {
    const status = error.response?.status
    const message = error.response?.data?.message || error.message || '请求失败'

    if (status === 401) {
      useAuthStore.getState().logout()
      window.location.href = '/login'
    }

    return Promise.reject(new Error(message))
  }
)

/** 包装业务请求（注册/业务类接口） */
export async function apiPost<TReq, TRes>(
  url: string,
  data: TReq,
  config?: AxiosRequestConfig
): Promise<TRes> {
  const body: ApiRequest<TReq> = {
    device: Device.Web,
    language: Language.SimplifiedChinese,
    data,
  }

  const response = await client.post<ApiResponse<TRes>>(url, body, config)
  const result = response.data

  if (!result.success) {
    throw new Error(result.message)
  }

  if (result.data === null) {
    throw new Error('接口返回数据为空')
  }

  return result.data
}

/** 原始 POST（登录/认证类接口，不包装） */
export async function rawPost<TReq, TRes>(
  url: string,
  data: TReq,
  config?: AxiosRequestConfig
): Promise<TRes> {
  const response = await client.post<TRes>(url, data, config)
  return response.data
}

/** 通用 GET */
export async function apiGet<TRes>(url: string, config?: AxiosRequestConfig): Promise<TRes> {
  const response = await client.get<ApiResponse<TRes>>(url, config)
  const result = response.data

  if (!result.success) {
    throw new Error(result.message)
  }

  if (result.data === null) {
    throw new Error('接口返回数据为空')
  }

  return result.data
}

export default client