import axios from "axios";
import { tansParams } from "./tools";
import cache from "./cache";

// 是否显示重新登录
export let isRelogin = { show: false };

axios.defaults.headers["Content-Type"] = "application/json;charset=utf-8";
// 创建axios实例
const service = axios.create({
  // 超时
  timeout: 1000000,
});

// request拦截器
service.interceptors.request.use(
  (config) => {
    // console.log('axios request...', config);
    // 是否需要防止数据重复提交
    const isRepeatSubmit = (config.headers || {}).repeatSubmit === false;
    // get请求映射params参数
    if (config.method === "get" && config.params) {
      let url = config.url + "?" + tansParams(config.params);
      url = url.slice(0, -1);
      config.params = {};
      config.url = url;
    }
    if (
      !isRepeatSubmit &&
      (config.method === "post" || config.method === "put")
    ) {
      const requestObj = {
        url: config.url,
        data:
          typeof config.data === "object"
            ? JSON.stringify(config.data)
            : config.data,
        time: new Date().getTime(),
      };
      const sessionObj = cache.session.getJSON("sessionObj");
      if (
        sessionObj === undefined ||
        sessionObj === null ||
        sessionObj === ""
      ) {
        cache.session.setJSON("sessionObj", requestObj);
      } else {
        const s_url = sessionObj.url; // 请求地址
        const s_data = sessionObj.data; // 请求数据
        const s_time = sessionObj.time; // 请求时间
        const interval = 1000; // 间隔时间(ms)，小于此时间视为重复提交
        if (
          s_data === requestObj.data &&
          requestObj.time - s_time < interval &&
          s_url === requestObj.url
        ) {
          const message = "数据正在处理，请勿重复提交";
          console.warn(`[${s_url}]: ` + message);
          return Promise.reject(new Error(message));
        } else {
          cache.session.setJSON("sessionObj", requestObj);
        }
      }
    }
    return config;
  },
  (error) => {
    console.log(error);
    Promise.reject(error);
  }
);

// 响应拦截器
service.interceptors.response.use(
  (res) => {
    console.log("axios response...", res);

    // 未设置状态码则默认成功状态
    const code = res.data.code || 200;
    // 二进制数据则直接返回
    if (
      res.request.responseType === "blob" ||
      res.request.responseType === "arraybuffer"
    ) {
      let enc = new TextDecoder("utf-8");
      let json = null
      try {
        json = JSON.parse(enc.decode(new Uint8Array(res.data)));
      } catch (e) {
        json = res.data
      }
      return json
    }
    if (code === 401) {
      if (!ELEMENT.$_overTime) {
        ELEMENT.$_overTime = ELEMENT.Notification.error({
          title: "失败",
          message: "code 401, 3秒后退出登录",
        });
        setTimeout(() => {
          window.location.href = "/";
        }, 3000);
      }
      return Promise.reject("无效的会话，或者会话已过期，请重新登录。");
    }

    if (code == 200) {
      if (res.config.showMsg) {
        ELEMENT.Message.success(res.data.message || res.data.status);
      }
      return res.data;
    } else {
      if (res.config.showMsg) {
        ELEMENT.Message.error(res.data.message || res.data.status);
      }
      return null
    }
  },
  (error) => {
    ELEMENT.Message.error(error.message);
    return Promise.reject(error);
  }
);

export function getBlob(url) {
  return service
    .get(url, {
      headers: { "Content-Type": "application/x-www-form-urlencoded" },
      responseType: "blob",
    })
    .then(async (data) => {
      const blob = new Blob([data]);
      return blob;
    });
}

export default service;
