/**
 * Copyright 2017 Google Inc. All rights reserved.
 *
 * 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.
 */

const helper = require('./helper');

class Dialog {
  /**
   * @param {!Session} client
   * @param {!Dialog.Type} type
   * @param {string} message
   * @param {(string|undefined)} defaultValue
   */
  constructor(client, type, message, defaultValue = '') {
    this._client = client;
    this.type = type;
    this._message = message;
    this._handled = false;
    this._defaultValue = defaultValue;
  }

  /**
   * @return {string}
   */
  message() {
    return this._message;
  }

  /**
   * @return {string}
   */
  defaultValue() {
    return this._defaultValue;
  }

  /**
   * @param {string=} promptText
   */
  async accept(promptText) {
    console.assert(!this._handled, 'Cannot accept dialog which is already handled!');
    this._handled = true;
    await this._client.send('Page.handleJavaScriptDialog', {
      accept: true,
      promptText: promptText
    });
  }

  async dismiss() {
    console.assert(!this._handled, 'Cannot dismiss dialog which is already handled!');
    this._handled = true;
    await this._client.send('Page.handleJavaScriptDialog', {
      accept: false
    });
  }
}

Dialog.Type = {
  Alert: 'alert',
  BeforeUnload: 'beforeunload',
  Confirm: 'confirm',
  Prompt: 'prompt'
};

module.exports = Dialog;
helper.tracePublicAPI(Dialog);