/*
 * Copyright 2012 by A-SIT, Secure Information Technology Center Austria
 *
 * Licensed under the EUPL, Version 1.1 or - as soon they will be approved by
 * the European Commission - subsequent versions of the EUPL (the "Licence");
 * You may not use this work except in compliance with the Licence.
 * You may obtain a copy of the Licence at:
 * http://joinup.ec.europa.eu/software/page/eupl
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the Licence is distributed on an "AS IS" basis,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the Licence for the specific language governing permissions and
 * limitations under the Licence.
 */
package at.asit.pdfover.gui.cliarguments;

// Imports
import java.util.Iterator;
import java.util.Set;

import at.asit.pdfover.gui.exceptions.InitializationException;
import at.asit.pdfover.commons.Messages;

/**
 * CLI Argument to show the useage message
 */
public class HelpArgument extends Argument {

	/**
	 * Constructor
	 */
	public HelpArgument() {
		super(new String[] {"-h", "-?", "--help" },
				"argument.help.help");
	}

	/* (non-Javadoc)
	 * @see at.asit.pdfover.gui.cliarguments.CLIArgument#handleArgument(java.lang.String[], int, at.asit.pdfover.gui.workflow.StateMachine, at.asit.pdfover.gui.cliarguments.ArgumentHandler)
	 */
	@Override
	public int handleArgument(String[] args, int argOffset,
			ArgumentHandler handler)
			throws InitializationException {
		Set<Argument> arguments = handler.getArguments();

		Iterator<Argument> argumentIterator = arguments.iterator();

		System.out.println(Messages.getString("argument.info.help"));

		while(argumentIterator.hasNext()) {
			Argument argument = argumentIterator.next();
			StringBuilder sb = new StringBuilder();

			for(int i = 0; i < argument.getCommandOptions().length; i++) {
				sb.append(argument.getCommandOptions()[i]);

				if(i < argument.getCommandOptions().length -1) {
					sb.append(", ");
				}
			}

			System.out.println(sb.toString() + ":");
			System.out.println("\t" + argument.getHelpText());
		}

		handler.setRequireExit(true);

		return argOffset;
	}

}