//
// Copyright (C) Stanislaw Adaszewski, 2020
// Contact: s.adaszewski@gmail.com
// Website: https://adared.ch/wba
// License: GNU Affero General Public License, Version 3
//

import wbApplyPromiseOrdering from 'wb-apply-promise-ordering';

const requestPromiseOrdering = {};

function makeArvadosRequest(arvHost, arvToken, endpoint, params={}) {
  const defaultParams = {
    'method': 'GET',
    'data': null,
    'contentType': 'application/json;charset=utf-8',
    'responseType': 'json',
    'useSsl': true,
    'requireToken': true,
    'onProgress': () => {},
    'promiseOrdering': true,
    'expectedStatus': 200
  };

  Object.keys(defaultParams).map(k => (params[k] =
    (k in params ? params[k] : defaultParams[k])));
  let { method, data, contentType, responseType,
    useSsl, requireToken, onProgress, promiseOrdering,
    expectedStatus } = params;

  if (!(arvHost && (arvToken || !requireToken)))
    return new Promise((accept, reject) => reject());

  let xhr = new XMLHttpRequest();
  xhr.open(method, (useSsl ? 'https://' : 'http://') + arvHost + endpoint);
  if (arvToken)
    xhr.setRequestHeader('Authorization', 'OAuth2 ' + arvToken);
  if (data !== null)
    xhr.setRequestHeader('Content-Type', contentType);
  xhr.responseType = responseType;

  xhr.onprogress = onProgress;

  let prom = new Promise((accept, reject) => {
    xhr.onreadystatechange = () => {
      if (xhr.readyState !== 4)
        return;

      if ((expectedStatus instanceof Array) &&
        expectedStatus.indexOf(xhr.status) !== -1) {
        accept(xhr);
      } else if (expectedStatus === xhr.status) {
        accept(xhr);
      } else {
        reject(xhr);
      }
    };
    xhr.send(data);
  });

  if (promiseOrdering)
    prom = wbApplyPromiseOrdering(prom, requestPromiseOrdering);

  return prom;
}

export default makeArvadosRequest;