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

// Licensed under the MIT License.

'use strict';

import { inject, injectable } from 'inversify';

import { Event, EventEmitter, Uri } from 'vscode';

import { IAsyncDisposableRegistry, IDisposableRegistry, Resource } from '../../common/types';

import { PythonInterpreter } from '../contracts';

import { IInterpreterAutoSeletionProxyService } from './types';

@injectable()

export class InterpreterAutoSeletionProxyService implements IInterpreterAutoSeletionProxyService {

private readonly didAutoSelectedInterpreterEmitter = new EventEmitter<void>();

private instance?: IInterpreterAutoSeletionProxyService;

constructor(@inject(IDisposableRegistry) private readonly disposables: IAsyncDisposableRegistry) { }

public registerInstance(instance: IInterpreterAutoSeletionProxyService): void {

this.instance = instance;

this.disposables.push(this.instance.onDidChangeAutoSelectedInterpreter(() => this.didAutoSelectedInterpreterEmitter.fire()));

}

public get onDidChangeAutoSelectedInterpreter(): Event<void> {

return this.didAutoSelectedInterpreterEmitter.event;

}

public getAutoSelectedInterpreter(resource: Resource): PythonInterpreter | undefined {

return this.instance ? this.instance.getAutoSelectedInterpreter(resource) : undefined;

}

public async setWorkspaceInterpreter(resource: Uri, interpreter: PythonInterpreter | undefined): Promise<void>{

return this.instance ? this.instance.setWorkspaceInterpreter(resource, interpreter) : undefined;

}

}