import axios from "axios";
import qs from "qs";
import { MessageBox, Notification } from "element-ui";
import router from "../router";
import Vue from "vue";

// 防止鉴权失效之后多次弹窗。
let unauthMsgBoxIsShow = false;

const mdData = datas => {
  let nData = {};
  if (!datas) return nData;
  Object.entries(datas).forEach(([key, val]) => {
    if (val === null || val === "null" || val === "") return;
    nData[key] = val;
  });
  return nData;
};

/**
 * errorCallback 请求失败的回调
 * @param {Object} error 请求失败时的错误信息
 */
const errorCallback = error => {
  let message = "";
  if (error.response) {
    message =
      (error.response.data && error.response.data.message) || "服务错误";
  } else if (error.request) {
    message = "请求错误";
    if (error.message.indexOf("timeout") > -1) {
      message = "请求超时";
    }
  } else {
    return error;
  }

  message = message.indexOf("###") !== -1 ? "参数错误" : message;
  Notification.error({ title: "错误提示", message });
  return error;
};

/**
 * errorDataCallback 请求成功，结果有误的回调
 * @param {Object} error Response中的data信息
 */
const errorDataCallback = error => {
  let message = error.message || "数据错误";
  message = message.indexOf("###") !== -1 ? "参数错误" : message;

  if (error.code === 106) {
    if (unauthMsgBoxIsShow) return error;
    unauthMsgBoxIsShow = true;
    message = "身份验证失效，请重新登录";
    MessageBox.confirm(message, "重新登陆?", {
      type: "warning",
      cancelButtonClass: "el-button--danger is-plain",
      confirmButtonClass: "el-button--primary",
      closeOnClickModal: false,
      closeOnPressEscape: false,
      showClose: false,
      callback: action => {
        unauthMsgBoxIsShow = false;
        if (action !== "confirm") return;
        Vue.ls.clear();
        router.push({ name: "Login" });
      }
    });
  } else {
    Notification.error({ title: "错误提示", message });
  }
  return error;
};

/**
 * response format
 *  {
      config, header, data, request, status, statusText
    }
 * 
 */

/**
 * successCallback 请求成功的回调
 * @param {Object} data Response中的data信息
 */
const successCallback = data => {
  if (data.code === 200) {
    return data.data;
  } else {
    throw new Error(errorDataCallback(data));
  }
};

/**
 * get请求
 * @param {String} url 请求地址
 * @param {Object} datas 请求数据
 */
const $get = (url, datas) => {
  const sqDatas = qs.stringify(mdData(datas), {
    arrayFormat: "brackets"
  });
  url += "?" + sqDatas;

  return axios
    .get(url)
    .then(rep => {
      return successCallback(rep.data);
    })
    .catch(error => {
      throw new Error(errorCallback(error));
    });
};

/**
 * get请求
 * @param {String} url 请求地址
 * @param {Object} datas 请求数据
 */
const $postParam = (url, datas, config = {}) => {
  const sqDatas = qs.stringify(mdData(datas), {
    arrayFormat: "brackets"
  });
  url += "?" + sqDatas;

  return axios
    .post(url, {}, config)
    .then(rep => {
      return successCallback(rep.data);
    })
    .catch(error => {
      throw new Error(errorCallback(error));
    });
};

/**
 * post请求
 * @param {String} url 请求地址
 * @param {Object} datas 请求数据
 */
const $post = (url, datas, config = {}) => {
  let sqDatas = {};
  if (datas.constructor === Object) {
    sqDatas = mdData(datas);
  } else {
    sqDatas = datas;
  }

  return axios
    .post(url, sqDatas, config)
    .then(rep => {
      return successCallback(rep.data);
    })
    .catch(error => {
      throw new Error(errorCallback(error));
    });
};

/**
 * delete请求
 * @param {String} url
 * @param {Object} datas
 */
const $del = (url, datas) => {
  let sqDatas = "";
  if (datas) {
    sqDatas = qs.stringify(datas, { arrayFormat: "brackets" });
    url += "?" + sqDatas;
  }
  return axios
    .delete(url)
    .then(rep => {
      return rep.data;
    })
    .catch(error => {
      throw new Error(errorCallback(error));
    });
};

/**
 * put 请求
 * @param {String} url 请求地址
 * @param {Object} datas 请求数据
 */
const $put = (url, datas) => {
  let sqDatas = "";
  if (datas) {
    sqDatas = qs.stringify(datas);
  }

  return axios
    .put(url, sqDatas)
    .then(rep => {
      return rep.data;
    })
    .catch(error => {
      throw new Error(errorCallback(error));
    });
};

/**
 * patch请求
 * @param {String} url 请求地址
 * @param {Object} datas 请求数据
 */
const $patch = (url, datas) => {
  let sqDatas = "";
  if (datas) {
    sqDatas = qs.stringify(datas);
  }

  return axios
    .patch(url, sqDatas)
    .then(rep => {
      return rep.data;
    })
    .catch(error => {
      throw new Error(errorCallback(error));
    });
};

export { $get, $postParam, $post, $del, $put, $patch };