/*
 * SonarQube :: Web
 * Copyright (C) 2009-2016 SonarSource SA
 * mailto:contact AT sonarsource DOT com
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 3 of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */
import $ from 'jquery';
import _ from 'underscore';

function createFrame () {
  var uuid = _.uniqueId('upload-form-');
  return $('<iframe></iframe>')
      .prop('frameborder', 0)
      .prop('width', 0)
      .prop('height', 0)
      .prop('id', uuid)
      .prop('name', uuid)
      .css('display', 'none');
}

export default function (options) {
  var deferred = new $.Deferred(),
      body = $('body'),
      frame = createFrame(),
      parent = options.form.parent(),
      clonedForm = options.form.detach();

  clonedForm
      .prop('target', frame.prop('id'))
      .appendTo(frame);

  frame.appendTo(body);

  frame.on('load', function () {
    var result = this.contentWindow.document.body.textContent;
    try {
      var js = JSON.parse(result);
      deferred.resolve(js);
    } catch (e) {
      deferred.resolve(result);
    }
    clonedForm.detach().appendTo(parent);
    frame.off('load').remove();
  });

  clonedForm.submit();

  return deferred.promise();
}