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

// Licensed under the MIT License.

'use strict';

import { inject, injectable } from 'inversify';

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

import { IServiceContainer } from '../ioc/types';

import { FolderVersionPair, IDownloadChannelRule } from './types';

const lastCheckedForLSDateTimeCacheKey = 'LS.LAST.CHECK.TIME';

const frequencyForBetalLSDownloadCheck = 1000 * 60 * 60 * 24; // One day.

@injectable()

export class DownloadDailyChannelRule implements IDownloadChannelRule {

public async shouldLookForNewLanguageServer(currentFolder?: FolderVersionPair): Promise<boolean> {

return true;

}

}

@injectable()

export class DownloadStableChannelRule implements IDownloadChannelRule {

public async shouldLookForNewLanguageServer(currentFolder?: FolderVersionPair): Promise<boolean> {

return currentFolder ? false : true;

}

}

@injectable()

export class DownloadBetaChannelRule implements IDownloadChannelRule {

constructor(@inject(IServiceContainer) private readonly serviceContainer: IServiceContainer) { }

public async shouldLookForNewLanguageServer(currentFolder?: FolderVersionPair): Promise<boolean> {

// For beta, we do this only once a day.

const stateFactory = this.serviceContainer.get<IPersistentStateFactory>(IPersistentStateFactory);

const globalState = stateFactory.createGlobalPersistentState<boolean>(lastCheckedForLSDateTimeCacheKey,

true,

frequencyForBetalLSDownloadCheck);

// If we haven't checked it in the last 24 hours, then ensure we don't do it again.

if (globalState.value) {

await globalState.updateValue(false);

return true;

}

return !currentFolder || globalState.value;

}

}