import axios from 'axios';
import store from '../store';
import router from '../router';
import { HTTP_BASE_URL } from "./config"

let redirectingToLogin = false;

function redirectToLogin() {
  if (redirectingToLogin || router.currentRoute.path === '/login') {
    return;
  }

  redirectingToLogin = true;
  router.replace('/login').then(
    () => {
      redirectingToLogin = false;
    },
    (navigationError) => {
      redirectingToLogin = false;
      if (navigationError.name !== 'NavigationDuplicated') {
        console.error(navigationError);
      }
    }
  );
}

// 配置请求
const request = axios.create({
  baseURL: HTTP_BASE_URL,
  timeout: 10000,
});

// 请求拦截器：每次请求都带上token
request.interceptors.request.use(
  (config) => {
    // 在请求头中添加token
    const token = localStorage.getItem('token');
    if (token) {
      config.headers['Authorization'] = `${token}`;
    }
    return config;
  },
  (error) => {
    return Promise.reject(error);
  }
);

request.interceptors.response.use(
  (response) => {
    return response.data;  
  },
  (error) => {
    if (error.response && error.response.status === 401) {
      // 如果返回401，说明token过期或无效，清除token并跳转到登录页
      store.commit('SET_TOKEN', '');
      store.commit('SET_USERNAME', '');
      redirectToLogin();
    }
    return Promise.reject(error);
  }
);

export default request;