/*
 * Copyright (c) Thomas Parker, 2012.
 * 
 * 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.facet;

import java.util.IdentityHashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;

import pcgen.cdom.enumeration.CharID;
import pcgen.cdom.enumeration.ListKey;
import pcgen.cdom.facet.model.StatFacet;
import pcgen.core.PCStat;
import pcgen.core.bonus.BonusObj;
import pcgen.core.bonus.BonusUtilities;

/**
 * StatBonusFacet is a Facet that calculates the bonus provided by PCStat objects on
 * a Player Character.
 * 
 * @author Thomas Parker (thpr [at] yahoo.com)
 */
public class StatBonusFacet
{
	private BonusCheckingFacet bonusCheckingFacet;
	private PrerequisiteFacet prerequisiteFacet;
	private StatFacet statFacet;

	/**
	 * Returns a non-null Map indicating the bonuses of the given Bonus type and
	 * given Bonus name, mapped to the PCStat objects which granted the Bonus.
	 * 
	 * @param id
	 *            The CharID indicating the Player Character on which the
	 *            bonuses for a given Bonus type and Bonus name are to be
	 *            returned
	 * @param aType
	 *            The Bonus type of the bonuses to be returned
	 * @param aName
	 *            The Bonus name of the bonuses to be returned
	 * @return A non-null Map indicating the bonuses of the given Bonus type and
	 *         given Bonus name, mapped to the PCStat objects which granted the
	 *         Bonus
	 */
	public Map<BonusObj, PCStat> getBonusListOfType(CharID id,
			final String aType, final String aName)
	{
		final Map<BonusObj, PCStat> aList = new IdentityHashMap<>();

		for (PCStat stat : statFacet.getSet(id))
		{
			List<BonusObj> bonuses = BonusUtilities.getBonusFromList(stat
					.getSafeListFor(ListKey.BONUS), aType, aName);
			for (BonusObj bonus : bonuses)
			{
				aList.put(bonus, stat);
			}
		}

		return aList;
	}

	/**
	 * Returns the aggregate Bonus value for the given Bonus type and given
	 * Bonus name which are applied by PCStat objects to the Player Character
	 * identified by the given CharID.
	 * 
	 * @param id
	 *            The CharID identifying the Player Character for which the
	 *            aggregate Bonus value is to be calculated
	 * @param type
	 *            The Bonus type for which the aggregate Bonus value is to be
	 *            calculated
	 * @param name
	 *            The Bonus name for which the aggregate Bonus value is to be
	 *            calculated
	 * @return The aggregate Bonus value for the given Bonus type and given
	 *         Bonus name which are applied by PCStat objects to the Player
	 *         Character identified by the given CharID
	 */
	public double getStatBonusTo(CharID id, String type, String name)
	{
		final Map<BonusObj, PCStat> map = getBonusListOfType(id, type
				.toUpperCase(), name.toUpperCase());
		for (Iterator<Map.Entry<BonusObj, PCStat>> it = map.entrySet()
				.iterator(); it.hasNext();)
		{
			Entry<BonusObj, PCStat> me = it.next();
			BonusObj bo = me.getKey();
			if (!prerequisiteFacet.qualifies(id, bo, me.getValue()))
			{
				it.remove();
			}
		}
		return bonusCheckingFacet.calcBonus(id, map);
	}

	public void setBonusCheckingFacet(BonusCheckingFacet bonusCheckingFacet)
	{
		this.bonusCheckingFacet = bonusCheckingFacet;
	}

	public void setPrerequisiteFacet(PrerequisiteFacet prerequisiteFacet)
	{
		this.prerequisiteFacet = prerequisiteFacet;
	}

	public void setStatFacet(StatFacet statFacet)
	{
		this.statFacet = statFacet;
	}

}