/*
 * 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.race;

import java.util.Collection;

import pcgen.base.util.WeightedCollection;
import pcgen.cdom.enumeration.ListKey;
import pcgen.core.Race;
import pcgen.core.bonus.Bonus;
import pcgen.core.bonus.BonusObj;
import pcgen.core.prereq.Prerequisite;
import pcgen.rules.context.Changes;
import pcgen.rules.context.LoadContext;
import pcgen.rules.persistence.token.AbstractToken;
import pcgen.rules.persistence.token.CDOMPrimaryToken;
import pcgen.rules.persistence.token.ParseResult;

/**
 * Class deals with STARTFEATS Token
 */
public class StartfeatsToken extends AbstractToken implements
		CDOMPrimaryToken<Race>
{

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

	@Override
	public ParseResult parseToken(LoadContext context, Race race, String value)
	{
		int bonusValue;

		try
		{
			bonusValue = Integer.parseInt(value);
		}
		catch (NumberFormatException nfe)
		{
			return new ParseResult.Fail("Error encountered in "
					+ getTokenName()
					+ " was expecting value to be an integer, found: " + value, context);
		}

		BonusObj bon = Bonus.newBonus(context, "FEAT|POOL|" + bonusValue);
		if (bon == null)
		{
			return new ParseResult.Fail("Internal Error: " + getTokenName()
					+ " had invalid bonus", context);
		}
		Prerequisite prereq = getPrerequisite("PREMULT:1,[PREHD:MIN=1],[PRELEVEL:MIN=1]");
		if (prereq == null)
		{
			return new ParseResult.Fail("Internal Error: " + getTokenName()
					+ " had invalid prerequisite", context);
		}
		bon.addPrerequisite(prereq);
		bon.setTokenSource(getTokenName());
		context.getObjectContext().addToList(race, ListKey.BONUS, bon);
		return ParseResult.SUCCESS;
	}

	@Override
	public String[] unparse(LoadContext context, Race race)
	{
		Changes<BonusObj> changes = context.getObjectContext().getListChanges(race,
				ListKey.BONUS);
		if (changes == null || changes.isEmpty())
		{
			// Empty indicates no token present
			return null;
		}
		// CONSIDER need to deal with removed...
		Collection<BonusObj> added = changes.getAdded();
		String tokenName = getTokenName();
		Collection<String> bonusSet = new WeightedCollection<>(
				String.CASE_INSENSITIVE_ORDER);
		for (BonusObj bonus : added)
		{
			if (tokenName.equals(bonus.getTokenSource()))
			{
				bonusSet.add(bonus.getValue());
			}
		}
		if (bonusSet.isEmpty())
		{
			// This is okay - just no BONUSes from this token
			return null;
		}
		return bonusSet.toArray(new String[bonusSet.size()]);
	}

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

}