import axios from 'axios'
import { Message } from 'element-ui'

const api = axios.create({
  baseURL: '/api',
  timeout: 15000
})

api.interceptors.request.use(config => {
  const token = sessionStorage.getItem('token')
  if (token) config.headers.Authorization = 'Bearer ' + token
  return config
})

api.interceptors.response.use(
  response => response.data,
  error => {
    if (error.response && error.response.status === 401) {
      sessionStorage.removeItem('token')
      window.location.href = '/login'
      return Promise.reject(error)
    }
    if (error.code === 'ECONNABORTED') {
      error._toast = true
      Message.error('请求超时：服务器繁忙或无响应，请稍后重试')
    } else if (!error.response) {
      error._toast = true
      Message.error('网络异常：无法连接服务器，请检查网络后重试')
    }
    return Promise.reject(error)
  }
)

export default api