/*
 * Copyright (c) 2022. Deutsche Telekom AG
 *
 * 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.
 *
 * SPDX-License-Identifier: Apache-2.0
 */


import { Injectable } from '@angular/core';

@Injectable({
  providedIn: 'root',
})
export class FullscreenService {
  private doc = <FullScreenDocument>document;

  enter() {
    const el = this.doc.documentElement;
    if (el.requestFullscreen) el.requestFullscreen();
    else if (el.msRequestFullscreen) el.msRequestFullscreen();
    else if (el.mozRequestFullScreen) el.mozRequestFullScreen();
    else if (el.webkitRequestFullscreen) el.webkitRequestFullscreen();
  }

  leave() {
    if (this.doc.exitFullscreen) this.doc.exitFullscreen();
    else if (this.doc.msExitFullscreen) this.doc.msExitFullscreen();
    else if (this.doc.mozCancelFullScreen) this.doc.mozCancelFullScreen();
    else if (this.doc.webkitExitFullscreen) this.doc.webkitExitFullscreen();
  }
}

interface FullScreenDocument extends HTMLDocument {
  documentElement: FullScreenDocumentElement;
  mozFullScreenElement?: Element;
  msFullscreenElement?: Element;
  webkitFullscreenElement?: Element;
  msExitFullscreen?: () => void;
  mozCancelFullScreen?: () => void;
  webkitExitFullscreen?: () => void;
}

interface FullScreenDocumentElement extends HTMLElement {
  msRequestFullscreen?: () => void;
  mozRequestFullScreen?: () => void;
  webkitRequestFullscreen?: () => void;
}