/**
 * 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.
 */

import { assert } from './helper';
import { CDPSession } from './Connection';

/* TODO(jacktfranklin): protocol.d.ts defines this
 * so let's ditch this and avoid the duplication
 */
export enum DialogType {
  Alert = 'alert',
  BeforeUnload = 'beforeunload',
  Confirm = 'confirm',
  Prompt = 'prompt',
}

export class Dialog {
  static Type = DialogType;

  private _client: CDPSession;
  private _type: DialogType;
  private _message: string;
  private _defaultValue: string;
  private _handled = false;

  constructor(
    client: CDPSession,
    type: DialogType,
    message: string,
    defaultValue = ''
  ) {
    this._client = client;
    this._type = type;
    this._message = message;
    this._defaultValue = defaultValue;
  }

  type(): DialogType {
    return this._type;
  }

  message(): string {
    return this._message;
  }

  defaultValue(): string {
    return this._defaultValue;
  }

  async accept(promptText?: string): Promise<void> {
    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(): Promise<void> {
    assert(!this._handled, 'Cannot dismiss dialog which is already handled!');
    this._handled = true;
    await this._client.send('Page.handleJavaScriptDialog', {
      accept: false,
    });
  }
}