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

// Licensed under the MIT License.

'use strict';

import { inject, injectable } from 'inversify';

import { ConfigurationTarget } from 'vscode';

import { IApplicationShell } from '../common/application/types';

import '../common/extensions';

import { IConfigurationService, IPersistentStateFactory,

IPythonExtensionBanner } from '../common/types';

import * as localize from '../common/utils/localize';

import { captureTelemetry, sendTelemetryEvent } from '../telemetry';

import { Telemetry } from './constants';

import { IJupyterExecution } from './types';

export enum InteractiveShiftEnterStateKeys {

ShowBanner = 'InteractiveShiftEnterBanner'

}

enum InteractiveShiftEnterLabelIndex {

Yes,

No

}

// Create a banner to ask users if they want to send shift-enter to the interactive window or not

@injectable()

export class InteractiveShiftEnterBanner implements IPythonExtensionBanner {

private initialized?: boolean;

private disabledInCurrentSession: boolean = false;

private bannerMessage: string = localize.InteractiveShiftEnterBanner.bannerMessage();

private bannerLabels: string[] = [localize.InteractiveShiftEnterBanner.bannerLabelYes(), localize.InteractiveShiftEnterBanner.bannerLabelNo()];

constructor(

@inject(IApplicationShell) private appShell: IApplicationShell,

@inject(IPersistentStateFactory) private persistentState: IPersistentStateFactory,

@inject(IJupyterExecution) private jupyterExecution: IJupyterExecution,

@inject(IConfigurationService) private configuration: IConfigurationService)

{

this.initialize();

}

public initialize() {

if (this.initialized) {

return;

}

this.initialized = true;

if (!this.enabled) {

return;

}

}

public get enabled(): boolean {

return this.persistentState.createGlobalPersistentState<boolean>(InteractiveShiftEnterStateKeys.ShowBanner, true).value;

}

public async showBanner(): Promise<void> {

if (!this.enabled) {

return;

}

const show = await this.shouldShowBanner();

if (!show) {

return;

}

// This check is independent from shouldShowBanner, that just checks the persistent state.

// The Jupyter check should only happen once and should disable the banner if it fails (don't reprompt and don't recheck)

const jupyterFound = await this.jupyterExecution.isNotebookSupported();

if (!jupyterFound) {

await this.disableBanner();

return;

}

sendTelemetryEvent(Telemetry.ShiftEnterBannerShown);

const response = await this.appShell.showInformationMessage(this.bannerMessage, ...this.bannerLabels);

switch (response) {

case this.bannerLabels[InteractiveShiftEnterLabelIndex.Yes]: {

await this.enableInteractiveShiftEnter();

break;

}

case this.bannerLabels[InteractiveShiftEnterLabelIndex.No]: {

await this.disableInteractiveShiftEnter();

break;

}

default: {

// Disable for the current session.

this.disabledInCurrentSession = true;

}

}

}

public async shouldShowBanner(): Promise<boolean> {

const settings = this.configuration.getSettings();

return Promise.resolve(this.enabled && !this.disabledInCurrentSession && !settings.datascience.sendSelectionToInteractiveWindow && settings.datascience.enabled);

}

@captureTelemetry(Telemetry.DisableInteractiveShiftEnter)

public async disableInteractiveShiftEnter(): Promise<void> {

await this.configuration.updateSetting('dataScience.sendSelectionToInteractiveWindow', false, undefined, ConfigurationTarget.Global);

await this.disableBanner();

}

@captureTelemetry(Telemetry.EnableInteractiveShiftEnter)

public async enableInteractiveShiftEnter(): Promise<void> {

await this.configuration.updateSetting('dataScience.sendSelectionToInteractiveWindow', true, undefined, ConfigurationTarget.Global);

await this.disableBanner();

}

private async disableBanner(): Promise<void> {

await this.persistentState.createGlobalPersistentState<boolean>(InteractiveShiftEnterStateKeys.ShowBanner, false).updateValue(false);

}

}