/*******************************************************************************
 * Copyright (c) 2015 Red Hat, Inc. 
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v2.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * 	Contributors:
 * 		 Red Hat Inc. - initial API and implementation and/or initial documentation
 *******************************************************************************/
package org.eclipse.wst.jsdt.js.common.util;

/**
 * @author "Ilya Buziuk (ibuziuk)"
 */
public class PlatformUtil {
	private static final String MAC = "mac"; //$NON-NLS-1$
	private static final String DARWIN = "darwin"; //$NON-NLS-1$
	private static final String WIN = "win"; //$NON-NLS-1$
	private static final String LINUX = "nux"; //$NON-NLS-1$
	private static OS detectedOs;
	
	public static boolean isWindows() {
		return OS.WINDOWS.equals(getOs());
	}

	public static boolean isMacOS() {
		return OS.MACOS.equals(getOs());
	}

	public static boolean isLinux() {
		return OS.LINUX.equals(getOs());
	}

	public static OS getOs() {
		if (detectedOs == null) {
			String currentOs = System.getProperty("os.name", "generic").toLowerCase(); //$NON-NLS-1$ //$NON-NLS-2$
			if ((currentOs.indexOf(MAC) >= 0) || (currentOs.indexOf(DARWIN) >= 0)) {
				detectedOs = OS.MACOS;
			} else if (currentOs.indexOf(WIN) >= 0) {
				detectedOs = OS.WINDOWS;
			} else if (currentOs.indexOf(LINUX) >= 0) {
				detectedOs = OS.LINUX;
			} else {
				detectedOs = OS.OTHER;
			}
		}
		return detectedOs;
	}

	public enum OS {
		WINDOWS, MACOS, LINUX, OTHER
	}
}