/**
 * 全站http配置
 *
 * axios参数说明
 * isSerialize是否开启form表单提交
 * isToken是否需要token
 */
import axios from 'axios';
import store from '@/store/';
import router from '@/router/';
import { serialize } from '@/utils/util';
import { getToken, removeToken, removeRefreshToken } from '@/utils/auth';
import { isURL, validatenull } from '@/utils/validate';
import { ElMessage } from 'element-plus';
import website from '@/config/website';
import NProgress from 'nprogress'; // progress bar
import 'nprogress/nprogress.css'; // progress bar style
import { Base64 } from 'js-base64';
import { baseUrl } from '@/config/env';
import crypto from '@/utils/crypto';

// 全局未授权错误提示状态，只提示一次
let isErrorShown = false;
// 全局锁机制相关变量
let isRefreshing = false; // 标记当前是否正在刷新token
let refreshTokenPromise = null; // 刷新token的Promise，避免重复请求

axios.defaults.timeout = 30000;
//返回其他状态码
axios.defaults.validateStatus = function (status) {
  return status >= 200 && status <= 500; // 默认的
};
//跨域请求，允许保存cookie
axios.defaults.withCredentials = true;
// NProgress Configuration
NProgress.configure({
  showSpinner: false,
});

//http request拦截
axios.interceptors.request.use(
  config => {
    // start progress bar
    NProgress.start();
    // 初始化错误提示状态
    isErrorShown = false;
    //地址为已经配置状态则不添加前缀
    if (!isURL(config.url) && !config.url.startsWith(baseUrl)) {
      config.url = baseUrl + config.url;
    }
    //安全请求header
    config.headers['Blade-Requested-With'] = 'BladeHttpRequest';
    //headers判断是否需要
    const authorization = config.authorization === false;
    if (!authorization) {
      config.headers['Authorization'] = `Basic ${Base64.encode(
        `${website.clientId}:${website.clientSecret}`
      )}`;
    }
    //headers判断请求是否携带token
    const meta = config.meta || {};
    const isToken = meta.isToken === false;
    //headers传递token是否加密
    const cryptoToken = config.cryptoToken === true;
    //判断传递数据是否加密
    const cryptoData = config.cryptoData === true;
    const token = getToken();
    if (token && !isToken) {
      config.headers[website.tokenHeader] = cryptoToken
        ? 'crypto ' + crypto.encryptAES(token, crypto.cryptoKey)
        : 'bearer ' + token;
    }
    // 开启报文加密
    if (cryptoData) {
      if (config.params) {
        const data = crypto.encryptAES(JSON.stringify(config.params), crypto.aesKey);
        config.params = { data };
      }
      if (config.data) {
        config.text = true;
        config.data = crypto.encryptAES(JSON.stringify(config.data), crypto.aesKey);
      }
    }
    //headers中配置text请求
    if (config.text === true) {
      config.headers['Content-Type'] = 'text/plain';
    }
    //headers中配置serialize为true开启序列化
    if (config.method === 'post' && meta.isSerialize === true) {
      config.data = serialize(config.data);
    }
    return config;
  },
  error => {
    return Promise.reject(error);
  }
);

//http response拦截
axios.interceptors.response.use(
  res => {
    NProgress.done();
    //获取配置信息
    const config = res.config;
    const cryptoData = config.cryptoData === true;
    //解析加密报文
    if (cryptoData) {
      res.data = JSON.parse(crypto.decryptAES(res.data, crypto.aesKey));
    }
    //获取状态信息
    const status = res.data.error_code || res.data.code || res.status;
    const statusWhiteList = website.statusWhiteList || [];
    const message = res.data.msg || res.data.error_description || '系统错误';
    //如果在白名单里则自行catch逻辑处理
    if (statusWhiteList.includes(status)) return Promise.reject(res);
    // 如果是401并且没有重试过，尝试刷新token
    if (status === 401 && !config._retry) {
      config._retry = true;

      // 如果当前已经在刷新token，等待刷新完成
      if (isRefreshing) {
        return refreshTokenPromise.then(() => {
          const meta = config.meta || {};
          const isToken = meta.isToken === false;
          const cryptoToken = config.cryptoToken === true;
          const token = getToken();
          if (token && !isToken) {
            config.headers[website.tokenHeader] = cryptoToken
              ? 'crypto ' + crypto.encryptAES(token, crypto.cryptoKey)
              : 'bearer ' + token;
          }
          return axios(config);
        });
      }

      // 开始刷新token
      isRefreshing = true;

      // 调用RefreshToken action来刷新token
      refreshTokenPromise = store
        .dispatch('RefreshToken')
        .then(() => {
          isRefreshing = false; // 重置刷新标志
          const meta = config.meta || {};
          const isToken = meta.isToken === false;
          const cryptoToken = config.cryptoToken === true;
          // 获取刷新后的token
          const token = getToken();
          if (token && !isToken) {
            config.headers[website.tokenHeader] = cryptoToken
              ? 'crypto ' + crypto.encryptAES(token, crypto.cryptoKey)
              : 'bearer ' + token;
          }
          return axios(config);
        })
        .catch(() => {
          isRefreshing = false; // 重置刷新标志
          // 首次报错时提示
          if (!isErrorShown) {
            isErrorShown = true;
            ElMessage({
              message: '用户令牌不可用，请重新登录',
              type: 'error',
            });
          }
          // 清除token信息
          removeToken();
          removeRefreshToken();
          // 重定向到登录页
          store.dispatch('FedLogOut').then(() => router.push({ path: '/login' }));
          return Promise.reject(new Error(message));
        });

      return refreshTokenPromise;
    }

    // 如果是401并且已经重试过，直接跳转到登录页面
    if (status === 401 && config._retry) {
      if (!isErrorShown) {
        isErrorShown = true;
        ElMessage({
          message: '用户令牌不可用，请重新登录',
          type: 'error',
        });
      }
      removeToken();
      removeRefreshToken();
      store.dispatch('FedLogOut').then(() => router.push({ path: '/login' }));
      return Promise.reject(new Error(message));
    }

    // 如果请求为oauth2错误码则首次报错时提示
    if (status > 2000 && !validatenull(res.data.error_description)) {
      if (!isErrorShown) {
        isErrorShown = true;
        ElMessage({
          message: message,
          type: 'error',
        });
      }
      return Promise.reject(new Error(message));
    }

    // 如果请求为非200则默认统一处理
    if (status !== 200 && status != 2) {
      ElMessage({
        message: message,
        type: 'error',
      });
      return Promise.reject(new Error(message));
    }
    return res;
  },
  error => {
    NProgress.done();
    return Promise.reject(new Error(error));
  }
);

export default axios;