/*---------------------------------------------------------------------------------------------
 *  Copyright (c) Microsoft Corporation. All rights reserved.
 *  Licensed under the MIT License. See License.txt in the project root for license information.
 *--------------------------------------------------------------------------------------------*/

import { localize } from 'vs/nls';
import product from 'vs/platform/product/node/product';
import pkg from 'vs/platform/product/node/package';
import * as path from 'vs/base/common/path';
import * as semver from 'semver-umd';

import { ServiceCollection } from 'vs/platform/instantiation/common/serviceCollection';
import { SyncDescriptor } from 'vs/platform/instantiation/common/descriptors';
import { IInstantiationService } from 'vs/platform/instantiation/common/instantiation';
import { InstantiationService } from 'vs/platform/instantiation/common/instantiationService';
import { IEnvironmentService, ParsedArgs } from 'vs/platform/environment/common/environment';
import { EnvironmentService } from 'vs/platform/environment/node/environmentService';
import { IExtensionManagementService, IExtensionGalleryService, IGalleryExtension, ILocalExtension } from 'vs/platform/extensionManagement/common/extensionManagement';
import { ExtensionManagementService } from 'vs/platform/extensionManagement/node/extensionManagementService';
import { ExtensionGalleryService } from 'vs/platform/extensionManagement/common/extensionGalleryService';
import { ITelemetryService } from 'vs/platform/telemetry/common/telemetry';
import { combinedAppender, NullTelemetryService } from 'vs/platform/telemetry/common/telemetryUtils';
import { TelemetryService, ITelemetryServiceConfig } from 'vs/platform/telemetry/common/telemetryService';
import { resolveCommonProperties } from 'vs/platform/telemetry/node/commonProperties';
import { IRequestService } from 'vs/platform/request/common/request';
import { RequestService } from 'vs/platform/request/node/requestService';
import { IConfigurationService } from 'vs/platform/configuration/common/configuration';
import { ConfigurationService } from 'vs/platform/configuration/node/configurationService';
import { AppInsightsAppender } from 'vs/platform/telemetry/node/appInsightsAppender';
import { mkdirp, writeFile } from 'vs/base/node/pfs';
import { getBaseLabel } from 'vs/base/common/labels';
import { IStateService } from 'vs/platform/state/common/state';
import { StateService } from 'vs/platform/state/node/stateService';
import { ILogService, getLogLevel } from 'vs/platform/log/common/log';
import { isPromiseCanceledError } from 'vs/base/common/errors';
import { areSameExtensions, adoptToGalleryExtensionId, getGalleryExtensionId } from 'vs/platform/extensionManagement/common/extensionManagementUtil';
import { URI } from 'vs/base/common/uri';
import { getManifest } from 'vs/platform/extensionManagement/node/extensionManagementUtil';
import { IExtensionManifest, ExtensionType, isLanguagePackExtension } from 'vs/platform/extensions/common/extensions';
import { CancellationToken } from 'vs/base/common/cancellation';
import { LocalizationsService } from 'vs/platform/localizations/node/localizations';
import { Schemas } from 'vs/base/common/network';
import { SpdLogService } from 'vs/platform/log/node/spdlogService';
import { buildTelemetryMessage } from 'vs/platform/telemetry/node/telemetry';
import { FileService } from 'vs/platform/files/common/fileService';
import { IFileService } from 'vs/platform/files/common/files';
import { DiskFileSystemProvider } from 'vs/platform/files/node/diskFileSystemProvider';
import { DisposableStore } from 'vs/base/common/lifecycle';
import { IProductService } from 'vs/platform/product/common/product';

const notFound = (id: string) => localize('notFound', "Extension '{0}' not found.", id);
const notInstalled = (id: string) => localize('notInstalled', "Extension '{0}' is not installed.", id);
const useId = localize('useId', "Make sure you use the full extension ID, including the publisher, e.g.: {0}", 'ms-vscode.csharp');

function getId(manifest: IExtensionManifest, withVersion?: boolean): string {
	if (withVersion) {
		return `${manifest.publisher}.${manifest.name}@${manifest.version}`;
	} else {
		return `${manifest.publisher}.${manifest.name}`;
	}
}

const EXTENSION_ID_REGEX = /^([^.]+\..+)@(\d+\.\d+\.\d+(-.*)?)$/;

export function getIdAndVersion(id: string): [string, string | undefined] {
	const matches = EXTENSION_ID_REGEX.exec(id);
	if (matches && matches[1]) {
		return [adoptToGalleryExtensionId(matches[1]), matches[2]];
	}
	return [adoptToGalleryExtensionId(id), undefined];
}


export class Main {

	constructor(
		@IInstantiationService private readonly instantiationService: IInstantiationService,
		@IEnvironmentService private readonly environmentService: IEnvironmentService,
		@IExtensionManagementService private readonly extensionManagementService: IExtensionManagementService,
		@IExtensionGalleryService private readonly extensionGalleryService: IExtensionGalleryService
	) { }

	async run(argv: ParsedArgs): Promise<void> {
		if (argv['install-source']) {
			await this.setInstallSource(argv['install-source']);

		} else if (argv['list-extensions']) {
			await this.listExtensions(!!argv['show-versions'], argv['category']);

		} else if (argv['install-extension']) {
			const arg = argv['install-extension'];
			const args: string[] = typeof arg === 'string' ? [arg] : arg;
			await this.installExtensions(args, !!argv['force']);

		} else if (argv['uninstall-extension']) {
			const arg = argv['uninstall-extension'];
			const ids: string[] = typeof arg === 'string' ? [arg] : arg;
			await this.uninstallExtension(ids);
		} else if (argv['locate-extension']) {
			const arg = argv['locate-extension'];
			const ids: string[] = typeof arg === 'string' ? [arg] : arg;
			await this.locateExtension(ids);
		} else if (argv['telemetry']) {
			console.log(buildTelemetryMessage(this.environmentService.appRoot, this.environmentService.extensionsPath ? this.environmentService.extensionsPath : undefined));
		}
	}

	private setInstallSource(installSource: string): Promise<void> {
		return writeFile(this.environmentService.installSourcePath, installSource.slice(0, 30));
	}

	private async listExtensions(showVersions: boolean, category?: string): Promise<void> {
		let extensions = await this.extensionManagementService.getInstalled(ExtensionType.User);
		// TODO: we should save this array in a common place so that the command and extensionQuery can use it that way changing it is easier
		const categories = ['"programming languages"', 'snippets', 'linters', 'themes', 'debuggers', 'formatters', 'keymaps', '"scm providers"', 'other', '"extension packs"', '"language packs"'];
		if (category && category !== '') {
			if (categories.indexOf(category.toLowerCase()) < 0) {
				console.log('Invalid category please enter a valid category. To list valid categories run --category without a category specified');
				return;
			}
			extensions = extensions.filter(e => {
				if (e.manifest.categories) {
					const lowerCaseCategories: string[] = e.manifest.categories.map(c => c.toLowerCase());
					return lowerCaseCategories.indexOf(category.toLowerCase()) > -1;
				}
				return false;
			});
		} else if (category === '') {
			console.log('Possible Categories: ');
			categories.forEach(category => {
				console.log(category);
			});
			return;
		}
		extensions.forEach(e => console.log(getId(e.manifest, showVersions)));
	}

	private async installExtensions(extensions: string[], force: boolean): Promise<void> {
		const failed: string[] = [];
		const installedExtensionsManifests: IExtensionManifest[] = [];
		if (extensions.length) {
			console.log(localize('installingExtensions', "Installing extensions..."));
		}

		for (const extension of extensions) {
			try {
				const manifest = await this.installExtension(extension, force);
				if (manifest) {
					installedExtensionsManifests.push(manifest);
				}
			} catch (err) {
				console.error(err.message || err.stack || err);
				failed.push(extension);
			}
		}
		if (installedExtensionsManifests.some(manifest => isLanguagePackExtension(manifest))) {
			await this.updateLocalizationsCache();
		}
		return failed.length ? Promise.reject(localize('installation failed', "Failed Installing Extensions: {0}", failed.join(', '))) : Promise.resolve();
	}

	private async installExtension(extension: string, force: boolean): Promise<IExtensionManifest | null> {
		if (/\.vsix$/i.test(extension)) {
			extension = path.isAbsolute(extension) ? extension : path.join(process.cwd(), extension);

			const manifest = await getManifest(extension);
			const valid = await this.validate(manifest, force);

			if (valid) {
				return this.extensionManagementService.install(URI.file(extension)).then(id => {
					console.log(localize('successVsixInstall', "Extension '{0}' was successfully installed.", getBaseLabel(extension)));
					return manifest;
				}, error => {
					if (isPromiseCanceledError(error)) {
						console.log(localize('cancelVsixInstall', "Cancelled installing extension '{0}'.", getBaseLabel(extension)));
						return null;
					} else {
						return Promise.reject(error);
					}
				});
			}
			return null;
		}

		const [id, version] = getIdAndVersion(extension);
		return this.extensionManagementService.getInstalled(ExtensionType.User)
			.then(installed => this.extensionGalleryService.getCompatibleExtension({ id }, version)
				.then<IGalleryExtension>(null, err => {
					if (err.responseText) {
						try {
							const response = JSON.parse(err.responseText);
							return Promise.reject(response.message);
						} catch (e) {
							// noop
						}
					}
					return Promise.reject(err);
				})
				.then(async extension => {
					if (!extension) {
						return Promise.reject(new Error(`${notFound(version ? `${id}@${version}` : id)}\n${useId}`));
					}

					const manifest = await this.extensionGalleryService.getManifest(extension, CancellationToken.None);
					const [installedExtension] = installed.filter(e => areSameExtensions(e.identifier, { id }));
					if (installedExtension) {
						if (extension.version === installedExtension.manifest.version) {
							console.log(localize('alreadyInstalled', "Extension '{0}' is already installed.", version ? `${id}@${version}` : id));
							return Promise.resolve(null);
						}
						if (!version && !force) {
							console.log(localize('forceUpdate', "Extension '{0}' v{1} is already installed, but a newer version {2} is available in the marketplace. Use '--force' option to update to newer version.", id, installedExtension.manifest.version, extension.version));
							return Promise.resolve(null);
						}
						console.log(localize('updateMessage', "Updating the extension '{0}' to the version {1}", id, extension.version));
					}
					await this.installFromGallery(id, extension);
					return manifest;
				}));
	}

	private async validate(manifest: IExtensionManifest, force: boolean): Promise<boolean> {
		if (!manifest) {
			throw new Error('Invalid vsix');
		}

		const extensionIdentifier = { id: getGalleryExtensionId(manifest.publisher, manifest.name) };
		const installedExtensions = await this.extensionManagementService.getInstalled(ExtensionType.User);
		const newer = installedExtensions.filter(local => areSameExtensions(extensionIdentifier, local.identifier) && semver.gt(local.manifest.version, manifest.version))[0];

		if (newer && !force) {
			console.log(localize('forceDowngrade', "A newer version of extension '{0}' v{1} is already installed. Use '--force' option to downgrade to older version.", newer.identifier.id, newer.manifest.version, manifest.version));
			return false;
		}

		return true;
	}

	private async installFromGallery(id: string, extension: IGalleryExtension): Promise<void> {
		console.log(localize('installing', "Installing extension '{0}' v{1}...", id, extension.version));

		try {
			await this.extensionManagementService.installFromGallery(extension);
			console.log(localize('successInstall', "Extension '{0}' v{1} was successfully installed.", id, extension.version));
		} catch (error) {
			if (isPromiseCanceledError(error)) {
				console.log(localize('cancelVsixInstall', "Cancelled installing extension '{0}'.", id));
			} else {
				throw error;
			}
		}
	}

	private async uninstallExtension(extensions: string[]): Promise<void> {
		async function getExtensionId(extensionDescription: string): Promise<string> {
			if (!/\.vsix$/i.test(extensionDescription)) {
				return extensionDescription;
			}

			const zipPath = path.isAbsolute(extensionDescription) ? extensionDescription : path.join(process.cwd(), extensionDescription);
			const manifest = await getManifest(zipPath);
			return getId(manifest);
		}

		const uninstalledExtensions: ILocalExtension[] = [];
		for (const extension of extensions) {
			const id = await getExtensionId(extension);
			const installed = await this.extensionManagementService.getInstalled(ExtensionType.User);
			const [extensionToUninstall] = installed.filter(e => areSameExtensions(e.identifier, { id }));
			if (!extensionToUninstall) {
				return Promise.reject(new Error(`${notInstalled(id)}\n${useId}`));
			}
			console.log(localize('uninstalling', "Uninstalling {0}...", id));
			await this.extensionManagementService.uninstall(extensionToUninstall, true);
			uninstalledExtensions.push(extensionToUninstall);
			console.log(localize('successUninstall', "Extension '{0}' was successfully uninstalled!", id));
		}

		if (uninstalledExtensions.some(e => isLanguagePackExtension(e.manifest))) {
			await this.updateLocalizationsCache();
		}
	}

	private async locateExtension(extensions: string[]): Promise<void> {
		const installed = await this.extensionManagementService.getInstalled();
		extensions.forEach(e => {
			installed.forEach(i => {
				if (i.identifier.id === e) {
					if (i.location.scheme === Schemas.file) {
						console.log(i.location.fsPath);
						return;
					}
				}
			});
		});
	}

	private async updateLocalizationsCache(): Promise<void> {
		const localizationService = this.instantiationService.createInstance(LocalizationsService);
		await localizationService.update();
		localizationService.dispose();
	}
}

const eventPrefix = 'monacoworkbench';

export async function main(argv: ParsedArgs): Promise<void> {
	const services = new ServiceCollection();
	const disposables = new DisposableStore();

	const environmentService = new EnvironmentService(argv, process.execPath);
	const logService: ILogService = new SpdLogService('cli', environmentService.logsPath, getLogLevel(environmentService));
	process.once('exit', () => logService.dispose());
	logService.info('main', argv);

	await Promise.all<void | undefined>([environmentService.appSettingsHome.fsPath, environmentService.extensionsPath]
		.map((path): undefined | Promise<void> => path ? mkdirp(path) : undefined));

	const configurationService = new ConfigurationService(environmentService.settingsResource);
	disposables.add(configurationService);
	await configurationService.initialize();

	services.set(IEnvironmentService, environmentService);
	services.set(ILogService, logService);
	services.set(IConfigurationService, configurationService);
	services.set(IStateService, new SyncDescriptor(StateService));
	services.set(IProductService, { _serviceBrand: undefined, ...product });

	// Files
	const fileService = new FileService(logService);
	disposables.add(fileService);
	services.set(IFileService, fileService);

	const diskFileSystemProvider = new DiskFileSystemProvider(logService);
	disposables.add(diskFileSystemProvider);
	fileService.registerProvider(Schemas.file, diskFileSystemProvider);

	const instantiationService: IInstantiationService = new InstantiationService(services);

	return instantiationService.invokeFunction(async accessor => {
		const envService = accessor.get(IEnvironmentService);
		const stateService = accessor.get(IStateService);

		const { appRoot, extensionsPath, extensionDevelopmentLocationURI: extensionDevelopmentLocationURI, isBuilt, installSourcePath } = envService;

		const services = new ServiceCollection();


		services.set(IRequestService, new SyncDescriptor(RequestService));
		services.set(IExtensionManagementService, new SyncDescriptor(ExtensionManagementService));
		services.set(IExtensionGalleryService, new SyncDescriptor(ExtensionGalleryService));

		const appenders: AppInsightsAppender[] = [];
		if (isBuilt && !extensionDevelopmentLocationURI && !envService.args['disable-telemetry'] && product.enableTelemetry) {

			if (product.aiConfig && product.aiConfig.asimovKey) {
				appenders.push(new AppInsightsAppender(eventPrefix, null, product.aiConfig.asimovKey, logService));
			}

			const config: ITelemetryServiceConfig = {
				appender: combinedAppender(...appenders),
				commonProperties: resolveCommonProperties(product.commit, pkg.version, stateService.getItem('telemetry.machineId'), installSourcePath),
				piiPaths: extensionsPath ? [appRoot, extensionsPath] : [appRoot]
			};

			services.set(ITelemetryService, new SyncDescriptor(TelemetryService, [config]));

		} else {
			services.set(ITelemetryService, NullTelemetryService);
		}

		const instantiationService2 = instantiationService.createChild(services);
		const main = instantiationService2.createInstance(Main);

		try {
			await main.run(argv);
			// Flush the remaining data in AI adapter.
			await combinedAppender(...appenders).flush();
		} finally {
			disposables.dispose();
		}
	});
}