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

import * as vscode from 'vscode';
import * as fs from 'fs';
import * as os from 'os';
import { join } from 'path';

export function rndName() {
	return Math.random().toString(36).replace(/[^a-z]+/g, '').substr(0, 10);
}

export function createRandomFile(contents = '', dir: string = os.tmpdir(), ext = ''): Thenable<vscode.Uri> {
	return new Promise((resolve, reject) => {
		const tmpFile = join(dir, rndName() + ext);
		fs.writeFile(tmpFile, contents, (error) => {
			if (error) {
				return reject(error);
			}

			resolve(vscode.Uri.file(tmpFile));
		});
	});
}

export function pathEquals(path1: string, path2: string): boolean {
	if (process.platform !== 'linux') {
		path1 = path1.toLowerCase();
		path2 = path2.toLowerCase();
	}

	return path1 === path2;
}

export function deleteFile(file: vscode.Uri): Thenable<boolean> {
	return new Promise((resolve, reject) => {
		fs.unlink(file.fsPath, (err) => {
			if (err) {
				reject(err);
			} else {
				resolve(true);
			}
		});
	});
}

export function closeAllEditors(): Thenable<any> {
	return vscode.commands.executeCommand('workbench.action.closeAllEditors');

}

export function disposeAll(disposables: vscode.Disposable[]) {
	while (disposables.length) {
		let item = disposables.pop();
		if (item) {
			item.dispose();
		}
	}
}

export function conditionalTest(name: string, testCallback: (done: MochaDone) => void | Thenable<any>) {
	if (isTestTypeActive()) {
		const async = !!testCallback.length;
		if (async) {
			test(name, (done) => testCallback(done));
		} else {
			test(name, () => (<() => void | Thenable<any>>testCallback)());
		}
	}
}

function isTestTypeActive(): boolean {
	return !!vscode.extensions.getExtension('vscode-resolver-test');
}