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

import * as nls from 'vscode-nls';
const localize = nls.loadMessageBundle();

import { ExtensionContext, workspace, window, Disposable, commands, OutputChannel } from 'vscode';
import { findGit, Git } from './git';
import { Model } from './model';
import { CommandCenter } from './commands';
import { GitFileSystemProvider } from './fileSystemProvider';
import { GitDecorations } from './decorationProvider';
import { Askpass } from './askpass';
import { toDisposable, filterEvent, eventToPromise } from './util';
import TelemetryReporter from 'vscode-extension-telemetry';
import { GitExtension } from './api/git';
import { GitProtocolHandler } from './protocolHandler';
import { GitExtensionImpl } from './api/extension';
import * as path from 'path';
// import * as fs from 'fs';
import * as os from 'os';
import { GitTimelineProvider } from './timelineProvider';
import { registerAPICommands } from './api/api1';
import { TerminalEnvironmentManager } from './terminal';

const deactivateTasks: { (): Promise<any>; }[] = [];

export async function deactivate(): Promise<any> {
	for (const task of deactivateTasks) {
		await task();
	}
}

async function createModel(context: ExtensionContext, outputChannel: OutputChannel, telemetryReporter: TelemetryReporter, disposables: Disposable[]): Promise<Model> {
	const pathValue = workspace.getConfiguration('git').get<string | string[]>('path');
	let pathHints = Array.isArray(pathValue) ? pathValue : pathValue ? [pathValue] : [];

	const { isTrusted, workspaceFolders = [] } = workspace;
	const excludes = isTrusted ? [] : workspaceFolders.map(f => path.normalize(f.uri.fsPath).replace(/[\r\n]+$/, ''));

	if (!isTrusted && pathHints.length !== 0) {
		// Filter out any non-absolute paths
		pathHints = pathHints.filter(p => path.isAbsolute(p));
	}

	const info = await findGit(pathHints, gitPath => {
		outputChannel.appendLine(localize('validating', "Validating found git in: {0}", gitPath));
		if (excludes.length === 0) {
			return true;
		}

		const normalized = path.normalize(gitPath).replace(/[\r\n]+$/, '');
		const skip = excludes.some(e => normalized.startsWith(e));
		if (skip) {
			outputChannel.appendLine(localize('skipped', "Skipped found git in: {0}", gitPath));
		}
		return !skip;
	});

	const askpass = await Askpass.create(outputChannel, context.storagePath);
	disposables.push(askpass);

	const environment = askpass.getEnv();
	const terminalEnvironmentManager = new TerminalEnvironmentManager(context, environment);
	disposables.push(terminalEnvironmentManager);


	const git = new Git({
		gitPath: info.path,
		userAgent: `git/${info.version} (${(os as any).version?.() ?? os.type()} ${os.release()}; ${os.platform()} ${os.arch()}) azuredatudio`,
		version: info.version,
		env: environment,
	});
	const model = new Model(git, askpass, context.globalState, outputChannel);
	disposables.push(model);

	const onRepository = () => commands.executeCommand('setContext', 'gitOpenRepositoryCount', `${model.repositories.length}`);
	model.onDidOpenRepository(onRepository, null, disposables);
	model.onDidCloseRepository(onRepository, null, disposables);
	onRepository();

	outputChannel.appendLine(localize('using git', "Using git {0} from {1}", info.version, info.path));

	const onOutput = (str: string) => {
		const lines = str.split(/\r?\n/mg);

		while (/^\s*$/.test(lines[lines.length - 1])) {
			lines.pop();
		}

		outputChannel.appendLine(lines.join('\n'));
	};
	git.onOutput.addListener('log', onOutput);
	disposables.push(toDisposable(() => git.onOutput.removeListener('log', onOutput)));

	const cc = new CommandCenter(git, model, outputChannel, telemetryReporter);
	disposables.push(
		cc,
		new GitFileSystemProvider(model),
		new GitDecorations(model),
		new GitProtocolHandler(),
		new GitTimelineProvider(model, cc)
	);

	// checkGitVersion(info); {{SQL CARBON EDIT}} Don't check git version

	return model;
}

/* {{SQL CARBON EDIT}} - Comment out function that is unused due to our edit below
async function isGitRepository(folder: WorkspaceFolder): Promise<boolean> {
	if (folder.uri.scheme !== 'file') {
		return false;
	}

	const dotGit = path.join(folder.uri.fsPath, '.git');

	try {
		const dotGitStat = await new Promise<fs.Stats>((c, e) => fs.stat(dotGit, (err, stat) => err ? e(err) : c(stat)));
		return dotGitStat.isDirectory();
	} catch (err) {
		return false;
	}
}

async function warnAboutMissingGit(): Promise<void> {
	const config = workspace.getConfiguration('git');
	const shouldIgnore = config.get<boolean>('ignoreMissingGitWarning') === true;

	if (shouldIgnore) {
		return;
	}

	if (!workspace.workspaceFolders) {
		return;
	}

	const areGitRepositories = await Promise.all(workspace.workspaceFolders.map(isGitRepository));

	if (areGitRepositories.every(isGitRepository => !isGitRepository)) {
		return;
	}

	const download = localize('downloadgit', "Download Git");
	const neverShowAgain = localize('neverShowAgain', "Don't Show Again");
	const choice = await window.showWarningMessage(
		localize('notfound', "Git not found. Install it or configure it using the 'git.path' setting."),
		download,
		neverShowAgain
	);

	if (choice === download) {
		commands.executeCommand('vscode.open', Uri.parse('https://git-scm.com/'));
	} else if (choice === neverShowAgain) {
		await config.update('ignoreMissingGitWarning', true, true);
	}
}*/

export async function _activate(context: ExtensionContext): Promise<GitExtensionImpl> {
	const disposables: Disposable[] = [];
	context.subscriptions.push(new Disposable(() => Disposable.from(...disposables).dispose()));

	const outputChannel = window.createOutputChannel('Git');
	commands.registerCommand('git.showOutput', () => outputChannel.show());
	disposables.push(outputChannel);

	const { name, version, aiKey } = require('../package.json') as { name: string, version: string, aiKey: string };
	const telemetryReporter = new TelemetryReporter(name, version, aiKey);
	deactivateTasks.push(() => telemetryReporter.dispose());

	const config = workspace.getConfiguration('git', null);
	const enabled = config.get<boolean>('enabled');

	if (!enabled) {
		const onConfigChange = filterEvent(workspace.onDidChangeConfiguration, e => e.affectsConfiguration('git'));
		const onEnabled = filterEvent(onConfigChange, () => workspace.getConfiguration('git', null).get<boolean>('enabled') === true);
		const result = new GitExtensionImpl();

		eventToPromise(onEnabled).then(async () => result.model = await createModel(context, outputChannel, telemetryReporter, disposables));
		return result;
	}

	try {
		const model = await createModel(context, outputChannel, telemetryReporter, disposables);
		return new GitExtensionImpl(model);
	} catch (err) {
		if (!/Git installation not found/.test(err.message || '')) {
			throw err;
		}

		// console.warn(err.message); {{SQL CARBON EDIT}} turn-off Git missing prompt
		// outputChannel.appendLine(err.message); {{SQL CARBON EDIT}} turn-off Git missing prompt

		commands.executeCommand('setContext', 'git.missing', true);
		// warnAboutMissingGit(); {{SQL CARBON EDIT}} turn-off Git missing prompt

		return new GitExtensionImpl();
	}
}

let _context: ExtensionContext;
export function getExtensionContext(): ExtensionContext {
	return _context;
}

export async function activate(context: ExtensionContext): Promise<GitExtension> {
	_context = context;

	const result = await _activate(context);
	context.subscriptions.push(registerAPICommands(result));
	return result;
}

// {{SQL CARBON EDIT}} - delete unneeded functions at end of file