/*
 * ListSkillCost.java
 * Missing License Header, Copyright 2016 (C) Andrew Maitland <amaitland@users.sourceforge.net>
 *
 * This library 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 library 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 *
 */
package pcgen.cdom.facet.analysis;

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

import pcgen.cdom.base.AssociatedPrereqObject;
import pcgen.cdom.base.CDOMObject;
import pcgen.cdom.base.CDOMReference;
import pcgen.cdom.enumeration.AssociationKey;
import pcgen.cdom.enumeration.CharID;
import pcgen.cdom.enumeration.SkillCost;
import pcgen.cdom.facet.base.AbstractSubScopeFacet;
import pcgen.cdom.facet.event.DataFacetChangeEvent;
import pcgen.cdom.facet.event.DataFacetChangeListener;
import pcgen.cdom.facet.model.RaceFacet;
import pcgen.cdom.list.ClassSkillList;
import pcgen.core.Skill;

/**
 * ListSkillCostFacet processes SkillCosts associated with the MONCSKILL and
 * MONCCSKILL tokens.
 * 
 * @author Thomas Parker (thpr [at] yahoo.com)
 */
public class ListSkillCostFacet extends
		AbstractSubScopeFacet<ClassSkillList, SkillCost, Skill> implements
		DataFacetChangeListener<CharID, CDOMObject>
{
	private RaceFacet raceFacet;

	/**
	 * Adds the SkillCost objects granted by CDOMObjects, as applied directly to
	 * a ClassSkillList, when a CDOMObject is added to a Player Character.
	 * 
	 * Triggered when one of the Facets to which ListSkillCostFacet listens
	 * fires a DataFacetChangeEvent to indicate a CDOMObject was added to a
	 * Player Character.
	 * 
	 * @param dfce
	 *            The DataFacetChangeEvent containing the information about the
	 *            change
	 * 
	 * @see pcgen.cdom.facet.event.DataFacetChangeListener#dataAdded(pcgen.cdom.facet.event.DataFacetChangeEvent)
	 */
	@Override
	public void dataAdded(DataFacetChangeEvent<CharID, CDOMObject> dfce)
	{
		CDOMObject cdo = dfce.getCDOMObject();
		CharID id = dfce.getCharID();
		for (CDOMReference ref : cdo.getModifiedLists())
		{
			List<ClassSkillList> useList = new ArrayList<>();
			for (Object list : ref.getContainedObjects())
			{
				if (list instanceof ClassSkillList)
				{
					useList.add((ClassSkillList) list);
				}
			}
			if (!useList.isEmpty())
			{
				Collection<CDOMReference<Skill>> mods = cdo.getListMods(ref);
				for (CDOMReference<Skill> skRef : mods)
				{
					for (AssociatedPrereqObject apo : (Iterable<AssociatedPrereqObject>) cdo.getListAssociations(ref, skRef))
					{
						SkillCost sc =
								apo.getAssociation(AssociationKey.SKILL_COST);
						for (ClassSkillList csl : useList)
						{
							for (Skill skill : skRef.getContainedObjects())
							{
								add(id, csl, sc, skill, cdo);
							}
						}
					}
				}
			}
		}
	}

	/**
	 * Removes the SkillCost objects granted by CDOMObjects, as applied directly
	 * to a ClassSkillList, when a CDOMObject is removed from a Player
	 * Character.
	 * 
	 * Triggered when one of the Facets to which ListSkillCostFacet listens
	 * fires a DataFacetChangeEvent to indicate a CDOMObject was removed from a
	 * Player Character.
	 * 
	 * @param dfce
	 *            The DataFacetChangeEvent containing the information about the
	 *            change
	 * 
	 * @see pcgen.cdom.facet.event.DataFacetChangeListener#dataRemoved(pcgen.cdom.facet.event.DataFacetChangeEvent)
	 */
	@Override
	public void dataRemoved(DataFacetChangeEvent<CharID, CDOMObject> dfce)
	{
		removeAllFromSource(dfce.getCharID(), dfce.getCDOMObject());
	}

	public void setRaceFacet(RaceFacet raceFacet)
	{
		this.raceFacet = raceFacet;
	}

	/**
	 * Initializes the connections for ListSkillCostFacet to other facets.
	 * 
	 * This method is automatically called by the Spring framework during
	 * initialization of the ListSkillCostFacet.
	 */
	public void init()
	{
		raceFacet.addDataFacetChangeListener(this);
	}
}