Copyright (c) 2007, 2009 IBM Corporation and others.
This program and the accompanying materials
are made available under the terms of the Eclipse Public License 2.0
which accompanies this distribution, and is available at
https://www.eclipse.org/legal/epl-2.0/
SPDX-License-Identifier: EPL-2.0
Contributors:
    IBM Corporation - initial API and implementation
/*******************************************************************************
 * Copyright (c) 2007, 2009 IBM Corporation and others.
 *
 * This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License 2.0
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/legal/epl-2.0/
 *
 * SPDX-License-Identifier: EPL-2.0
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.equinox.internal.app;

import org.eclipse.osgi.service.environment.EnvironmentInfo;

public class CommandLineArgs {
	// obsolete command line args
	private static final String NO_PACKAGE_PREFIXES = "-noPackagePrefixes"; //$NON-NLS-1$
	private static final String NO_UPDATE = "-noUpdate"; //$NON-NLS-1$
	private static final String BOOT = "-boot"; //$NON-NLS-1$
	private static final String CLASSLOADER_PROPERTIES = "-classloaderProperties"; //$NON-NLS-1$	
	private static final String PLUGINS = "-plugins"; //$NON-NLS-1$
	private static final String FIRST_USE = "-firstUse"; //$NON-NLS-1$
	private static final String NEW_UPDATES = "-newUpdates"; //$NON-NLS-1$
	private static final String UPDATE = "-update"; //$NON-NLS-1$
	private static final String PASSWORD = "-password"; //$NON-NLS-1$
	private static final String KEYRING = "-keyring"; //$NON-NLS-1$
	private static final String PLUGIN_CUSTOMIZATION = "-pluginCustomization"; //$NON-NLS-1$

	// supported command line args
	private static final String PRODUCT = "-product"; //$NON-NLS-1$
	private static final String FEATURE = "-feature"; //$NON-NLS-1$
	private static final String APPLICATION = "-application"; //$NON-NLS-1$	

	// Command line args as seen by the Eclipse runtime. allArgs does NOT
	// include args consumed by the underlying framework (e.g., OSGi)
	private static String[] appArgs = new String[0];
	private static String[] allArgs = new String[0];
	private static String product;
	private static String application;

	static String[] processCommandLine(EnvironmentInfo envInfo) {
		String[] args = envInfo.getNonFrameworkArgs();
		if (args == null)
			return args;
		if (args.length == 0)
			return args;
		allArgs = args;
		int[] configArgs = new int[args.length];
		//need to initialize the first element to something that could not be an index.
		configArgs[0] = -1;
		int configArgIndex = 0;
		for (int i = 0; i < args.length; i++) {
			boolean found = false;
			// check for args without parameters (i.e., a flag arg)

			// consume obsolete args for compatibility
			if (args[i].equalsIgnoreCase(CLASSLOADER_PROPERTIES))
				found = true; // ignored
			if (args[i].equalsIgnoreCase(NO_PACKAGE_PREFIXES))
				found = true; // ignored
			if (args[i].equalsIgnoreCase(PLUGINS))
				found = true; // ignored
			if (args[i].equalsIgnoreCase(FIRST_USE))
				found = true; // ignored
			if (args[i].equalsIgnoreCase(NO_UPDATE))
				found = true; // ignored
			if (args[i].equalsIgnoreCase(NEW_UPDATES))
				found = true; // ignored
			if (args[i].equalsIgnoreCase(UPDATE))
				found = true; // ignored
			if (args[i].equalsIgnoreCase(BOOT))
				found = true; // ignored
			if (args[i].equalsIgnoreCase(KEYRING))
				found = true; // ignored  
			if (args[i].equalsIgnoreCase(PASSWORD))
				found = true; // ignored
			if (args[i].equalsIgnoreCase(PLUGIN_CUSTOMIZATION))
				found = true; // ignored

			// done checking obsolete for args.  Remember where an arg was found 
			if (found) {
				configArgs[configArgIndex++] = i;
				// check if the obsolete arg had a second param
				if (i < (args.length - 1) && !args[i + 1].startsWith("-")) //$NON-NLS-1$
					configArgs[configArgIndex++] = ++i;
				continue;
			}

			// check for args with parameters
			if (i == args.length - 1 || args[i + 1].startsWith("-")) //$NON-NLS-1$
				continue;
			String arg = args[++i];

			// look for the product to run
			// treat -feature as a synonym for -product for compatibility.
			if (args[i - 1].equalsIgnoreCase(PRODUCT) || args[i - 1].equalsIgnoreCase(FEATURE)) {
				product = arg;
				envInfo.setProperty(EclipseAppContainer.PROP_PRODUCT, product);
				found = true;
			}

			// look for the application to run.  
			if (args[i - 1].equalsIgnoreCase(APPLICATION)) {
				application = arg;
				envInfo.setProperty(EclipseAppContainer.PROP_ECLIPSE_APPLICATION, application);
				found = true;
			}

			// done checking for args.  Remember where an arg was found 
			if (found) {
				configArgs[configArgIndex++] = i - 1;
				configArgs[configArgIndex++] = i;
			}
		}

		// remove all the arguments consumed by this argument parsing
		if (configArgIndex == 0) {
			appArgs = args;
			return args;
		}
		appArgs = new String[args.length - configArgIndex];
		configArgIndex = 0;
		int j = 0;
		for (int i = 0; i < args.length; i++) {
			if (i == configArgs[configArgIndex])
				configArgIndex++;
			else
				appArgs[j++] = args[i];
		}
		return appArgs;
	}

	static String getApplication() {
		return application;
	}

	static String getProduct() {
		return product;
	}

	public static String[] getApplicationArgs() {
		return appArgs;
	}

	public static String[] getAllArgs() {
		return allArgs;
	}
}