/*
 * Copyright (c) 2008 Tom Parker <thpr@users.sourceforge.net>
 * 
 * This program is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Lesser General Public License as published by the Free
 * Software Foundation; either version 2.1 of the License, or (at your option)
 * any later version.
 * 
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
 * details.
 * 
 * You should have received a copy of the GNU Lesser General Public License
 * along with this library; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
 */
package plugin.lsttokens.template;

import java.util.Collection;
import java.util.StringTokenizer;

import pcgen.cdom.base.Constants;
import pcgen.cdom.enumeration.ListKey;
import pcgen.cdom.enumeration.RaceSubType;
import pcgen.core.PCTemplate;
import pcgen.rules.context.Changes;
import pcgen.rules.context.LoadContext;
import pcgen.rules.persistence.token.AbstractTokenWithSeparator;
import pcgen.rules.persistence.token.CDOMPrimaryToken;
import pcgen.rules.persistence.token.ParseResult;

/**
 * Class deals with RACESUBTYPE Token
 */
public class RacesubtypeToken extends AbstractTokenWithSeparator<PCTemplate>
		implements CDOMPrimaryToken<PCTemplate>
{

	@Override
	public String getTokenName()
	{
		return "RACESUBTYPE";
	}

	@Override
	protected char separator()
	{
		return '|';
	}

	@Override
	protected ParseResult parseTokenWithSeparator(LoadContext context, PCTemplate template, String value)
	{
		StringTokenizer tok = new StringTokenizer(value, Constants.PIPE);
		while (tok.hasMoreTokens())
		{
			String aType = tok.nextToken();

			if (aType.startsWith(".REMOVE."))
			{
				String substring = aType.substring(8);
				if (substring.isEmpty())
				{
					return new ParseResult.Fail("Invalid .REMOVE. in " + getTokenName()
						+ " requires an argument", context);
				}
				context.getObjectContext().addToList(template,
						ListKey.REMOVED_RACESUBTYPE,
						RaceSubType.getConstant(substring));
			}
			else
			{
				context.getObjectContext().addToList(template,
						ListKey.RACESUBTYPE, RaceSubType.getConstant(aType));
			}
		}
		return ParseResult.SUCCESS;
	}

	@Override
	public String[] unparse(LoadContext context, PCTemplate pct)
	{
		Changes<RaceSubType> addedChanges = context.getObjectContext()
				.getListChanges(pct, ListKey.RACESUBTYPE);
		Changes<RaceSubType> removedChanges = context.getObjectContext()
				.getListChanges(pct, ListKey.REMOVED_RACESUBTYPE);
		Collection<RaceSubType> added = addedChanges.getAdded();
		Collection<RaceSubType> removed = removedChanges.getAdded();
		if (added == null && removed == null)
		{
			return null;
		}
		StringBuilder sb = new StringBuilder();
		boolean needPipe = false;
		if (removed != null)
		{
			for (RaceSubType rst : removed)
			{
				if (needPipe)
				{
					sb.append(Constants.PIPE);
				}
				sb.append(".REMOVE.").append(rst.toString());
				needPipe = true;
			}
		}
		if (added != null)
		{
			for (RaceSubType rst : added)
			{
				if (needPipe)
				{
					sb.append(Constants.PIPE);
				}
				sb.append(rst.toString());
				needPipe = true;
			}
		}
		return new String[] { sb.toString() };
	}

	@Override
	public Class<PCTemplate> getTokenClass()
	{
		return PCTemplate.class;
	}
}