/*
 * Copyright (c) 2010 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 pcgen.cdom.primitive;

import java.util.ArrayList;
import java.util.Collection;

import pcgen.cdom.base.Converter;
import pcgen.cdom.base.PrimitiveCollection;
import pcgen.cdom.enumeration.GroupingState;
import pcgen.core.PlayerCharacter;

public class NegatingPrimitive<T> implements PrimitiveCollection<T>
{

	private final PrimitiveCollection<T> primitive;
	private final PrimitiveCollection<T> all;

	public NegatingPrimitive(PrimitiveCollection<T> prim, PrimitiveCollection<T> all)
	{
		if (prim == null)
		{
			throw new IllegalArgumentException(
					"PrimitiveCollection cannot be null");
		}
		if (all == null)
		{
			throw new IllegalArgumentException(
					"All Collection cannot be null");
		}
		primitive = prim;
		this.all = all;
	}

	@Override
	public <R> Collection<? extends R> getCollection(PlayerCharacter pc, Converter<T, R> c)
	{
		Collection<? extends R> result = all.getCollection(pc, c);
		ArrayList<R> list = new ArrayList<>(result);
		list.removeAll(primitive.getCollection(pc, c));
		return list;
	}

	@Override
	public Class<? super T> getReferenceClass()
	{
		return primitive.getReferenceClass();
	}

	/**
	 * Returns the GroupingState for this CompoundAndChoiceSet. The
	 * GroupingState indicates how this CompoundAndChoiceSet can be combined
	 * with other PrimitiveChoiceSets.
	 * 
	 * @return The GroupingState for this CompoundAndChoiceSet.
	 */
	@Override
	public GroupingState getGroupingState()
	{
		return primitive.getGroupingState().negate();
	}

	/**
	 * Returns a representation of this CompoundAndChoiceSet, suitable for
	 * storing in an LST file.
	 * 
	 * @return A representation of this CompoundAndChoiceSet, suitable for
	 *         storing in an LST file.
	 */
	@Override
	public String getLSTformat(boolean useAny)
	{
		return "!" + primitive.getLSTformat(useAny);
	}

	@Override
	public int hashCode()
	{
		return primitive.hashCode() - 1;
	}
	
	@Override
	public boolean equals(Object obj)
	{
		return (obj instanceof NegatingPrimitive)
				&& ((NegatingPrimitive<?>) obj).primitive.equals(primitive);
	}
}