// Copyright (c) Microsoft Corporation. All rights reserved.

// Licensed under the MIT License.

import { Event } from 'vscode';

import { IDisposable } from '../../common/types';

import { Disposables } from '../../common/utils/resourceLifecycle';

import { IPythonEnvsWatcher, PythonEnvsChangedEvent, PythonEnvsWatcher } from './watcher';

/**

* A wrapper around a set of watchers, exposing them as a single watcher.

*

* If any of the wrapped watchers emits an event then this wrapper

* emits that event.

*/

export class PythonEnvsWatchers implements IPythonEnvsWatcher, IDisposable {

public readonly onChanged: Event<PythonEnvsChangedEvent>;

private readonly watcher = new PythonEnvsWatcher();

private readonly disposables = new Disposables();

constructor(watchers: ReadonlyArray<IPythonEnvsWatcher>) {

this.onChanged = this.watcher.onChanged;

watchers.forEach((w) => {

const disposable = w.onChanged((e) => this.watcher.fire(e));

this.disposables.push(disposable);

});

}

public async dispose(): Promise<void> {

await this.disposables.dispose();

}

}