/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/

import Config from 'config.json';
import fetch from 'isomorphic-fetch';

function makeReqwest (url, method, data, options = {}) {
  if (!options.headers) options.headers = {};
  options.headers['Accept'] = 'application/json';

  return fetch(url, {
    method: method,
    body: data,
    headers: options.headers
  }).then(function (response) {
    if (!response.ok) return response.json().then(e => Promise.reject(e));
    return response.json();
  });
}

let BaseAdapter = {
  get (url, data, options) {
    return makeReqwest(url, 'get', data, options);
  },

  post (url, data, options = {}) {
    return makeReqwest(url, 'post', data, options);
  },

  put (url, data, options = {}) {
    return makeReqwest(url, 'put', data, options);
  },

  delete (url, data) {
    return makeReqwest(url, 'delete', data);
  },

  jsonToQueryParams (json) {
    // if json is an array?
    var queryParams = '?';
    if (!Object.prototype.toString.call(json).match('Array')) json = [json];

    json.forEach(object => {
      Object.keys(object).forEach(key => {
        queryParams += key + '=' + object[key] + '&';
      });
    });
    return queryParams.slice(0, -1);
  }
};

export default BaseAdapter;