import axios from 'axios'
import message from '@/utils/message'

const instance = axios.create({ timeout: 1000 * 300 })

// 请求拦截器 - 添加JWT token
instance.interceptors.request.use(
  config => {
    const token = localStorage.getItem('pptist_token')
    if (token) {
      config.headers.Authorization = `Bearer ${token}`
    }
    return config
  },
  error => {
    return Promise.reject(error)
  }
)

// 响应拦截器 - 处理认证错误和其他错误
instance.interceptors.response.use(
  response => {
    if (response.status >= 200 && response.status < 400) {
      return Promise.resolve(response.data)
    }
    message.error('未知的请求错误！')
    return Promise.reject(response)
  },
  error => {
    if (error && error.response) {
      const status = error.response.status
      
      // 处理认证错误
      if (status === 401) {
        localStorage.removeItem('pptist_token')
        localStorage.removeItem('pptist_user')
        message.error('登录已过期，请重新登录')
        // 可以在这里触发重定向到登录页面
        window.location.href = '/login'
        return Promise.reject('Authentication failed')
      }
      
      if (status >= 400 && status < 500) {
        const errorMsg = error.response.data?.error || error.message
        message.error(errorMsg)
        return Promise.reject(errorMsg)
      }
      else if (status >= 500) {
        const errorMsg = error.response.data?.error || '服务器内部错误'
        message.error(errorMsg)
        return Promise.reject(errorMsg)
      }
      
      message.error('服务器遇到未知错误！')
      return Promise.reject(error.message)
    }
    message.error('连接到服务器失败 或 服务器响应超时！')
    return Promise.reject(error)
  }
)

export default instance