/**
 * @license
 * Copyright (C) 2016 The Android Open Source Project
 *
 * Licensed 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.
 */
(function(window) {
  'use strict';

  /**
   * Ensure GrChangeReplyInterface instance has access to gr-reply-dialog
   * element and retrieve if the interface was created before element.
   *
   * @param {!GrChangeReplyInterfaceOld} api
   */
  function ensureEl(api) {
    if (!api._el) {
      const sharedApiElement = document.createElement('gr-js-api-interface');
      api._el = sharedApiElement.getElement(
          sharedApiElement.Element.REPLY_DIALOG);
    }
  }

  /**
   * @deprecated
   */
  function GrChangeReplyInterfaceOld(el) {
    this._el = el;
  }

  GrChangeReplyInterfaceOld.prototype.getLabelValue = function(label) {
    ensureEl(this);
    return this._el.getLabelValue(label);
  };

  GrChangeReplyInterfaceOld.prototype.setLabelValue = function(label, value) {
    ensureEl(this);
    this._el.setLabelValue(label, value);
  };

  GrChangeReplyInterfaceOld.prototype.send = function(opt_includeComments) {
    ensureEl(this);
    return this._el.send(opt_includeComments);
  };

  function GrChangeReplyInterface(plugin, el) {
    GrChangeReplyInterfaceOld.call(this, el);
    this.plugin = plugin;
    this._hookName = (plugin.getPluginName() || 'test') + '-autogenerated-'
      + String(Math.random()).split('.')[1];
  }
  GrChangeReplyInterface.prototype._hookName = '';
  GrChangeReplyInterface.prototype._hookClass = null;
  GrChangeReplyInterface.prototype._hookPromise = null;

  GrChangeReplyInterface.prototype =
    Object.create(GrChangeReplyInterfaceOld.prototype);
  GrChangeReplyInterface.prototype.constructor = GrChangeReplyInterface;

  GrChangeReplyInterface.prototype.addReplyTextChangedCallback =
    function(handler) {
      this.plugin.hook('reply-text').onAttached(el => {
        if (!el.content) { return; }
        el.content.addEventListener('value-changed', e => {
          handler(e.detail.value);
        });
      });
    };

  GrChangeReplyInterface.prototype.addLabelValuesChangedCallback =
    function(handler) {
      this.plugin.hook('reply-label-scores').onAttached(el => {
        if (!el.content) { return; }

        el.content.addEventListener('labels-changed', e => {
          console.log('labels-changed', e.detail);
          handler(e.detail);
        });
      });
    };

  GrChangeReplyInterface.prototype.showMessage = function(message) {
    return this._el.setPluginMessage(message);
  };

  window.GrChangeReplyInterface = GrChangeReplyInterface;
})(window);