/*---------------------------------------------------------------------------------------------
 *  Copyright (c) Microsoft Corporation. All rights reserved.
 *  Licensed under the Source EULA. See License.txt in the project root for license information.
 *--------------------------------------------------------------------------------------------*/
import * as azdata from 'azdata';
import * as vscode from 'vscode';
import * as mssql from '../../../mssql';
import { MigrationStateModel } from '../models/stateMachine';
import * as loc from '../constants/strings';
import { MigrationWizardPage } from '../models/migrationWizardPage';
import { SKURecommendationPage } from './skuRecommendationPage';
// import { SubscriptionSelectionPage } from './subscriptionSelectionPage';
import { DatabaseBackupPage } from './databaseBackupPage';
import { AccountsSelectionPage } from './accountsSelectionPage';
import { IntergrationRuntimePage } from './integrationRuntimePage';
import { SummaryPage } from './summaryPage';
import { MigrationModePage } from './migrationModePage';

export const WIZARD_INPUT_COMPONENT_WIDTH = '400px';
export class WizardController {
	constructor(private readonly extensionContext: vscode.ExtensionContext) {

	}

	public async openWizard(connectionId: string): Promise<void> {
		const api = (await vscode.extensions.getExtension(mssql.extension.name)?.activate()) as mssql.IExtension;
		if (api) {
			const stateModel = new MigrationStateModel(this.extensionContext, connectionId, api.sqlMigration);
			this.extensionContext.subscriptions.push(stateModel);
			this.createWizard(stateModel);
		}
	}

	private async createWizard(stateModel: MigrationStateModel): Promise<void> {
		const wizard = azdata.window.createWizard(loc.WIZARD_TITLE, 'MigrationWizard', 'wide');
		wizard.generateScriptButton.enabled = false;
		wizard.generateScriptButton.hidden = true;
		const skuRecommendationPage = new SKURecommendationPage(wizard, stateModel);
		// const subscriptionSelectionPage = new SubscriptionSelectionPage(wizard, stateModel);
		const migrationModePage = new MigrationModePage(wizard, stateModel);
		const azureAccountsPage = new AccountsSelectionPage(wizard, stateModel);
		const databaseBackupPage = new DatabaseBackupPage(wizard, stateModel);
		const integrationRuntimePage = new IntergrationRuntimePage(wizard, stateModel);
		const summaryPage = new SummaryPage(wizard, stateModel);

		const pages: MigrationWizardPage[] = [
			// subscriptionSelectionPage,
			azureAccountsPage,
			skuRecommendationPage,
			migrationModePage,
			databaseBackupPage,
			integrationRuntimePage,
			summaryPage
		];

		wizard.pages = pages.map(p => p.getwizardPage());

		const wizardSetupPromises: Thenable<void>[] = [];
		wizardSetupPromises.push(...pages.map(p => p.registerWizardContent()));
		wizardSetupPromises.push(wizard.open());

		wizard.onPageChanged(async (pageChangeInfo: azdata.window.WizardPageChangeInfo) => {
			const newPage = pageChangeInfo.newPage;
			const lastPage = pageChangeInfo.lastPage;

			await pages[lastPage]?.onPageLeave();
			await pages[newPage]?.onPageEnter();
		});

		wizard.registerNavigationValidator(async validator => {
			// const lastPage = validator.lastPage;

			// const canLeave = await pages[lastPage]?.canLeave() ?? true;
			// const canEnter = await pages[lastPage]?.canEnter() ?? true;

			// return canEnter && canLeave;
			return true;
		});

		await Promise.all(wizardSetupPromises);
		await pages[0].onPageEnter();

		wizard.doneButton.onClick(async (e) => {
			await stateModel.startMigration();
		});
	}
}

export function createInformationRow(view: azdata.ModelView, label: string, value: string): azdata.FlexContainer {
	return view.modelBuilder.flexContainer()
		.withLayout(
			{
				flexFlow: 'row',
				alignItems: 'center',
			})
		.withItems(
			[
				creaetLabelTextComponent(view, label),
				createTextCompononent(view, value)
			],
			{
				CSSStyles: { 'margin-right': '5px' }
			})
		.component();
}

export function createHeadingTextComponent(view: azdata.ModelView, value: string): azdata.TextComponent {
	const component = createTextCompononent(view, value);
	component.updateCssStyles({
		'font-size': '13px',
		'font-weight': 'bold'
	});
	return component;
}


export function creaetLabelTextComponent(view: azdata.ModelView, value: string): azdata.TextComponent {
	const component = createTextCompononent(view, value);
	component.updateCssStyles({
		'width': '300px'
	});
	return component;
}

export function createTextCompononent(view: azdata.ModelView, value: string): azdata.TextComponent {
	return view.modelBuilder.text().withProps({
		value: value
	}).component();
}