// (C) Copyright 2015 Moodle Pty Ltd.
//
// 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 { CorePlatform } from '@services/platform';
import { CoreIframeUtils } from '@services/utils/iframe';
import { WKUserScriptWindow } from 'cordova-plugin-wkuserscript';

/**
 * Check Whether the window object has WKUserScript set.
 *
 * @param window Window object.
 * @returns Whether the window object has WKUserScript set.
 */
function isWKUserScriptWindow(window: object): window is WKUserScriptWindow {
    return CorePlatform.isIOS() && 'WKUserScript' in window;
}

/**
 * Inject some scripts for iOS iframes.
 */
export default async function(): Promise<void> {
    await CorePlatform.ready();

    if (!isWKUserScriptWindow(window)) {
        return;
    }

    CoreIframeUtils.injectiOSScripts(window);
}