/* eslint-disable require-atomic-updates */
/* eslint-disable no-console */
/* eslint-disable no-param-reassign */

import _ from 'lodash';
import Axios from 'axios';
import { Util, Error } from 'naf-core';

const { trimData, isNullOrUndefined } = Util;
const { ErrorCode } = Error;

let currentRequests = 0;

export default class AxiosWrapper {
  constructor({ baseUrl = '', unwrap = true } = {}) {
    this.baseUrl = baseUrl;
    this.unwrap = unwrap;
  }

  // 替换uri中的参数变量
  static merge(uri, query = {}) {
    if (!uri.includes(':')) {
      return uri;
    }
    const keys = [];
    const regexp = /\/:([a-z0-9_]+)/gi;
    let res;
    // eslint-disable-next-line no-cond-assign
    while ((res = regexp.exec(uri)) != null) {
      keys.push(res[1]);
    }
    keys.forEach(key => {
      if (!isNullOrUndefined(query[key])) {
        uri = uri.replace(`:${key}`, query[key]);
      }
    });
    return uri;
  }

  $get(uri, query, options) {
    return this.$request(uri, null, query, options);
  }

  $delete(uri, query, options = {}) {
    return this.$request(uri, null, query, { ...options, method: 'delete' });
  }

  $post(uri, data = {}, query, options) {
    return this.$request(uri, data, query, options);
  }

  async $request(uri, data, query, options) {
    // 过滤key:''的情况
    query = _.pickBy(query, val => val !== '');
    if (!uri) console.error('uri不能为空');
    if (_.isObject(query) && _.isObject(options)) {
      const params = query.params ? query.params : query;
      options = { ...options, params };
    } else if (_.isObject(query) && !query.params) {
      options = { params: query };
    } else if (_.isObject(query) && query.params) {
      options = query;
    }
    if (!options) options = {};
    if (options.params) options.params = trimData(options.params);
    const url = AxiosWrapper.merge(uri, options.params);

    currentRequests += 1;
    // const loadingInstance = Loading.service({ spinner: 'el-icon-loading', background: 'rgba(0, 0, 0, 0.5)' });

    try {
      const axios = Axios.create({
        baseURL: this.baseUrl,
      });
      const user = localStorage.getItem('user');
      if (user) {
        axios.defaults.headers.common.Authorization = encodeURI(user);
      }
      let res = await axios.request({
        method: isNullOrUndefined(data) ? 'get' : 'post',
        url,
        data,
        responseType: 'json',
        ...options,
      });
      res = res.data || {};
      const { errcode, errmsg, details } = res;
      if (errcode) {
        console.warn(`[${uri}] fail: ${errcode}-${errmsg} ${details}`);
        return res;
      }
      // unwrap data
      if (this.unwrap) {
        // res = _.omit(res, ['errcode', 'errmsg', 'details']);
        const keys = Object.keys(res);
        if (keys.length === 1 && keys.includes('data')) {
          res = res.data;
        }
      }
      return res;
    } catch (err) {
      let errmsg = '接口请求失败，请稍后重试';
      if (err.response) {
        const { status, data = {} } = err.response;
        if (status === 401) errmsg = '用户认证失败，请重新登录';
        if (status === 403) errmsg = '当前用户不允许执行该操作';
        if (status === 400 && data.errcode) {
          const { errcode, errmsg, details } = data;
          console.warn(`[${uri}] fail: ${errcode}-${errmsg} ${details}`);
          return data;
        }
        if (data && data.error) {
          const { status, error, message } = data;
          console.warn(`[${uri}] fail: ${status}: ${error}-${message}`);
          return { errcode: status || ErrorCode.SERVICE_FAULT, errmsg: error, details: message };
        }
      }
      console.error(`[AxiosWrapper] 接口请求失败: ${err.config && err.config.url} - ${err.message}`);
      return { errcode: ErrorCode.SERVICE_FAULT, errmsg, details: err.message };
    } finally {
      currentRequests -= 1;
      if (currentRequests <= 0) {
        currentRequests = 0;
        // loadingInstance.close();
      }
    }
  }
}