import Vue from "vue";
import axios from "axios";
import {
  baseURL,
  contentType,
  debounce,
  invalidCode,
  noPermissionCode,
  requestTimeout,
  successCode,
  tokenName,
} from "@/config/settings";
import store from "@/store";
import qs from "qs";
import router from "@/router";
import { isArray } from "@/utils/validate";

let loadingInstance;

/**
 * @copyright chuzhixin 1204505056@qq.com
 * @description 判断当前url是否需要加loading
 * @param {*} config
 * @returns
 */
const needLoading = (config) => {
  let status = false;
  debounce.forEach((item) => {
    if (Vue.prototype.$baseLodash.includes(config.url, item)) {
      status = true;
    }
  });
  return status;
};

/**
 * @copyright chuzhixin 1204505056@qq.com
 * @description 处理code异常
 * @param {*} code
 * @param {*} msg
 */
const handleCode = (code, msg) => {
  switch (code) {
    case invalidCode:
      Vue.prototype.$baseMessage(msg || `后端接口${code}异常`, "error");
      store.dispatch("user/resetAccessToken").catch(() => {});
      break;
    case noPermissionCode:
      router.push({ path: "/401" }).catch(() => {});
      break;
    default:
      Vue.prototype.$baseMessage(msg || `后端接口${code}异常`, "error");
      break;
  }
};

const instance = axios.create({
  baseURL,
  timeout: requestTimeout,
  headers: {
    "Content-Type": contentType,
  },
});

instance.interceptors.request.use(
  (config) => {
    if (store.getters["user/accessToken"]) {
      config.headers[tokenName] = store.getters["user/accessToken"];
    }
    //这里会过滤所有为空、0、false的key，如果不需要请自行注释
    if (config.data)
      config.data = Vue.prototype.$baseLodash.pickBy(
        config.data,
        Vue.prototype.$baseLodash.identity
      );

    if (
      process.env.NODE_ENV !== "preview" &&
      contentType === "application/x-www-form-urlencoded;charset=UTF-8" &&
      config.data
    ) {
      config.data = qs.stringify(config.data);
    }

    if (needLoading(config)) {
      loadingInstance = Vue.prototype.$baseLoading();
    }
    return config;
  },
  (error) => {
    return Promise.reject(error);
  }
);

instance.interceptors.response.use(
  (response) => {
    if (loadingInstance) loadingInstance.close();

    const { status, data, config } = response;
    const { code, msg } = data;
    // 操作正常Code数组
    const codeVerificationArray = isArray(successCode)
      ? [...successCode]
      : [...[successCode]];
    // 是否操作正常
    if (codeVerificationArray.includes(code)) {
      return data;
    } else {
      handleCode(code, msg);
      return Promise.reject(
        "vue-admin-beautiful请求异常拦截:" +
          JSON.stringify({ url: config.url, code, msg }) || "Error"
      );
    }
  },
  (error) => {
    if (loadingInstance) loadingInstance.close();
    const { response, message } = error;
    if (error.response && error.response.data) {
      const { status, data } = response;
      handleCode(status, data.msg || message);
      return Promise.reject(error);
    } else {
      let { message } = error;
      if (message === "Network Error") {
        message = "后端接口连接异常";
      }
      if (message.includes("timeout")) {
        message = "后端接口请求超时";
      }
      if (message.includes("Request failed with status code")) {
        const code = message.substr(message.length - 3);
        message = "后端接口" + code + "异常";
      }
      Vue.prototype.$baseMessage(message || `后端接口未知异常`, "error");
      return Promise.reject(error);
    }
  }
);

export default instance;