/*
 * 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.spell;

import java.math.BigDecimal;
import java.util.ArrayList;
import java.util.List;

import pcgen.cdom.base.Constants;
import pcgen.cdom.enumeration.ObjectKey;
import pcgen.core.spell.Spell;
import pcgen.rules.context.LoadContext;
import pcgen.rules.persistence.token.AbstractNonEmptyToken;
import pcgen.rules.persistence.token.CDOMPrimaryToken;
import pcgen.rules.persistence.token.ParseResult;

/**
 * Class deals with COST Token
 */
public class CostToken extends AbstractNonEmptyToken<Spell> implements
		CDOMPrimaryToken<Spell>
{

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

	@Override
	protected ParseResult parseNonEmptyToken(LoadContext context, Spell spell,
		String value)
	{
		if (Constants.LST_DOT_CLEAR.equals(value))
		{
			context.getObjectContext().remove(spell, ObjectKey.COST);
		}
		else
		{
			try
			{
				BigDecimal cost = new BigDecimal(value);
				if (cost.compareTo(BigDecimal.ZERO) <= 0)
				{
					return new ParseResult.Fail(getTokenName()
						+ " requires a positive Integer", context);
				}
				context.getObjectContext().put(spell, ObjectKey.COST, cost);
			}
			catch (NumberFormatException nfe)
			{
				return new ParseResult.Fail(getTokenName()
					+ " expected an integer.  Tag must be of the form: "
					+ getTokenName() + ":<int>", context);
			}
		}
		return ParseResult.SUCCESS;
	}

	@Override
	public String[] unparse(LoadContext context, Spell spell)
	{
		BigDecimal i =
				context.getObjectContext().getObject(spell, ObjectKey.COST);
		boolean globalClear =
				context.getObjectContext().wasRemoved(spell, ObjectKey.COST);
		List<String> list = new ArrayList<>();
		if (globalClear)
 		{
			list.add(Constants.LST_DOT_CLEAR);
		}
		if (i != null)
		{
			if (i.compareTo(BigDecimal.ZERO) <= 00)
			{
				context.addWriteMessage(getTokenName()
						+ " requires a positive Integer");
				return null;
			}
			list.add(i.toString());
		}
		if (list.isEmpty())
		{
			return null;
 		}
		return list.toArray(new String[list.size()]);
	}

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