LQAdminFront/src/api/request.ts

import axios from 'axios'
import type { AxiosInstance, InternalAxiosRequestConfig, AxiosResponse } from 'axios'
import { ElMessage } from 'element-plus'
import { useAuthStore } from '@/stores/auth'
import { getToken, getRefreshToken } from '@/utils/auth'
import router from '@/router'

// 创建axios实例
const request: AxiosInstance = axios.create({
  baseURL: import.meta.env.VITE_API_BASE_URL || 'http://localhost:8000',
  timeout: 30000, // 调整为 30 秒，避免长时间挂起
  headers: {
    'Content-Type': 'application/json'
  }
})

// 请求拦截器
request.interceptors.request.use(
  (config: InternalAxiosRequestConfig) => {
    const token = getToken()
    if (token && config.headers) {
      config.headers.Authorization = `Bearer ${token}`
    }
    return config
  },
  (error) => {
    return Promise.reject(error)
  }
)

// 响应拦截器
request.interceptors.response.use(
  (response: AxiosResponse) => {
    const { code, message } = response.data ?? {}

    // 成功响应（兼容 code=0 和 code=200，以及无 code 的纯数据/Blob 返回）
    if (code === 0 || code === 200 || typeof code === 'undefined') {
      return response.data
    }
    
    // 业务错误
    if (!response.config.headers?.['Skip-Error-Message']) {
      ElMessage.error(message || '请求失败')
    }
    return Promise.reject(new Error(message || '请求失败'))
  },
  async (error) => {
    const { response } = error
    const skipErrorMessage = error.config?.headers?.['Skip-Error-Message']
    
    if (response) {
      const { status, data } = response
      
      switch (status) {
        case 401:
          // 未授权，尝试刷新token
          const authStore = useAuthStore()
          const refreshToken = getRefreshToken()
          
          if (refreshToken && !error.config._retry) {
            error.config._retry = true
            
            try {
              const success = await authStore.refreshToken()
              if (success) {
                // 重新发送原请求
                const token = getToken()
                if (token) {
                  error.config.headers.Authorization = `Bearer ${token}`
                }
                return request(error.config)
              }
            } catch (refreshError) {
              console.error('刷新token失败:', refreshError)
            }
          }
          
          // 刷新失败或没有refresh token，跳转到登录页
          await authStore.logout()
          router.push('/login')
          if (!skipErrorMessage) {
            ElMessage.error('登录已过期，请重新登录')
          }
          break
          
        case 403:
          if (!skipErrorMessage) ElMessage.error('权限不足')
          router.push('/unauthorized')
          break
          
        case 404:
          if (!skipErrorMessage) ElMessage.error('请求的资源不存在')
          break
          
        case 429:
          if (!skipErrorMessage) ElMessage.error('请求过于频繁，请稍后再试')
          break
          
        case 500:
          if (!skipErrorMessage) ElMessage.error('服务器内部错误')
          break
          
        default:
          if (!skipErrorMessage) ElMessage.error(data?.message || '请求失败')
      }
    } else {
      // 网络错误
      if (!skipErrorMessage) {
        ElMessage.error('网络连接失败，请检查网络设置')
      }
    }
    
    return Promise.reject(error)
  }
)

export default request