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

// Licensed under the MIT License.

import { Event } from 'vscode';

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

import { PythonEnvInfo } from './base/info';

import { ILocator, IPythonEnvsIterator, PythonLocatorQuery } from './base/locator';

import { GetLocatorFunc, LazyWrappingLocator } from './base/locators/common/wrappingLocator';

import { PythonEnvsChangedEvent } from './base/watcher';

/**

* The public API for the Python environments component.

*

* Note that this is composed of sub-components.

*/

export class PythonEnvironments implements ILocator, IDisposable {

private readonly disposables = new Disposables();

private readonly locators: ILocator;

constructor(

// These are factories for the sub-components the full component is composed of:

getLocators: GetLocatorFunc,

) {

const locators = new LazyWrappingLocator(getLocators);

this.locators = locators;

this.disposables.push(locators);

}

public async dispose(): Promise<void> {

await this.disposables.dispose();

}

// For ILocator:

public get onChanged(): Event<PythonEnvsChangedEvent> {

return this.locators.onChanged;

}

public iterEnvs(query?: PythonLocatorQuery): IPythonEnvsIterator {

return this.locators.iterEnvs(query);

}

public async resolveEnv(env: string | PythonEnvInfo): Promise<PythonEnvInfo | undefined> {

return this.locators.resolveEnv(env);

}

}