import axios, { AxiosInstance, AxiosResponse } from 'axios'
import { ElMessage } from 'element-plus'
import router from '@/router'

const service: AxiosInstance = axios.create({
  baseURL: import.meta.env.VITE_APP_BASE_API,
  timeout: 15000
})

// 请求拦截器
service.interceptors.request.use(
  (config) => {
    const token = localStorage.getItem('adminToken')
    if (token) {
      config.headers.Authorization = `Bearer ${token}`
    }
    return config
  },
  (error) => {
    console.error('请求错误:', error)
    return Promise.reject(error)
  }
)

// 响应拦截器
service.interceptors.response.use(
  (response: AxiosResponse) => {
    const res = response.data
    
    if (res.code !== 200) {
      ElMessage.error(res.message || '请求失败')
      
      if (res.code === 401) {
        localStorage.removeItem('adminToken')
        localStorage.removeItem('adminInfo')
        router.push('/login')
      }
      
      return Promise.reject(new Error(res.message || '请求失败'))
    }
    
    return res
  },
  (error) => {
    console.error('响应错误:', error)
    
    if (error.response) {
      const { status, data } = error.response
      
      if (status === 401) {
        ElMessage.error('未登录或登录已过期')
        localStorage.removeItem('adminToken')
        localStorage.removeItem('adminInfo')
        router.push('/login')
      } else if (status === 403) {
        ElMessage.error('无权限访问')
      } else if (status === 404) {
        ElMessage.error('请求的资源不存在')
      } else if (status === 500) {
        ElMessage.error(data?.message || '服务器错误')
      } else {
        ElMessage.error(data?.message || '请求失败')
      }
    } else if (error.request) {
      ElMessage.error('网络错误，请检查网络连接')
    } else {
      ElMessage.error('请求配置错误')
    }
    
    return Promise.reject(error)
  }
)

export default service