/*
 * 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.Collection;
import java.util.List;

import pcgen.cdom.base.AssociatedPrereqObject;
import pcgen.cdom.base.CDOMList;
import pcgen.cdom.base.CDOMObject;
import pcgen.cdom.base.CDOMReference;
import pcgen.cdom.enumeration.AssociationKey;
import pcgen.cdom.enumeration.CharID;
import pcgen.cdom.facet.event.DataFacetChangeEvent;
import pcgen.cdom.facet.event.DataFacetChangeListener;
import pcgen.cdom.helper.AvailableSpell;
import pcgen.cdom.list.ClassSpellList;
import pcgen.cdom.list.DomainSpellList;
import pcgen.core.prereq.Prerequisite;
import pcgen.core.spell.Spell;

public class KnownSpellInputFacet implements
		DataFacetChangeListener<CharID, CDOMObject>
{

	private ConditionallyKnownSpellFacet conditionallyKnownSpellFacet;

	private KnownSpellFacet knownSpellFacet;

	private CDOMObjectConsolidationFacet consolidationFacet;

	/**
	 * Triggered when one of the Facets to which ConditionallyKnownSpellFacet
	 * 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();
		Collection<CDOMReference<? extends CDOMList<?>>> listrefs =
				cdo.getModifiedLists();
		CharID id = dfce.getCharID();
		for (CDOMReference<? extends CDOMList<?>> ref : listrefs)
		{
			processListRef(id, cdo, ref);
		}
	}

	private void processListRef(CharID id, CDOMObject cdo,
		CDOMReference<? extends CDOMList<?>> listref)
	{
		for (CDOMList<?> list : listref.getContainedObjects())
		{
			if (!(list instanceof ClassSpellList)
				&& !(list instanceof DomainSpellList))
			{
				continue;
			}
			CDOMList<Spell> spelllist = (CDOMList<Spell>) list;
			processList(id, spelllist, listref, cdo);
		}
	}

	private void processList(CharID id, CDOMList<Spell> spelllist,
		CDOMReference<? extends CDOMList<?>> listref, CDOMObject cdo)
	{
		for (CDOMReference<Spell> objref : cdo
			.getListMods((CDOMReference<? extends CDOMList<Spell>>) listref))
		{
			for (AssociatedPrereqObject apo : cdo.getListAssociations(listref,
				objref))
			{
				Boolean known = apo.getAssociation(AssociationKey.KNOWN);
				if ((known == null) || !known.booleanValue())
				{
					continue;
				}
				Collection<Spell> spells = objref.getContainedObjects();
				Integer lvl = apo.getAssociation(AssociationKey.SPELL_LEVEL);
				if (apo.hasPrerequisites())
				{
					List<Prerequisite> prereqs = apo.getPrerequisiteList();
					for (Spell spell : spells)
					{
						AvailableSpell as =
								new AvailableSpell(spelllist, spell, lvl);
						as.addAllPrerequisites(prereqs);
						conditionallyKnownSpellFacet.add(id, as, cdo);
					}
				}
				else
				{
					for (Spell spell : spells)
					{
						knownSpellFacet.add(id, spelllist, lvl, spell, cdo);
					}
				}
			}
		}
	}

	/**
	 * Triggered when one of the Facets to which ConditionallyKnownSpellFacet
	 * 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)
	{
		CharID id = dfce.getCharID();
		CDOMObject source = dfce.getCDOMObject();
		conditionallyKnownSpellFacet.removeAll(id, source);
		knownSpellFacet.removeAllFromSource(id, source);
	}

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

	public void setConsolidationFacet(
		CDOMObjectConsolidationFacet consolidationFacet)
	{
		this.consolidationFacet = consolidationFacet;
	}

	public void setConditionallyKnownSpellFacet(
		ConditionallyKnownSpellFacet conditionallyKnownSpellFacet)
	{
		this.conditionallyKnownSpellFacet = conditionallyKnownSpellFacet;
	}

	public void setKnownSpellFacet(KnownSpellFacet knownSpellFacet)
	{
		this.knownSpellFacet = knownSpellFacet;
	}

}