/*
 * Copyright (c) Thomas Parker, 2015.
 * 
 * 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.analysis;

import pcgen.base.formula.base.ScopeInstance;
import pcgen.base.formula.base.VariableID;
import pcgen.cdom.base.CDOMObject;
import pcgen.cdom.enumeration.CharID;
import pcgen.cdom.facet.ScopeFacet;
import pcgen.cdom.facet.VariableLibraryFacet;
import pcgen.cdom.facet.VariableStoreFacet;
import pcgen.util.Logging;

/**
 * ResultFacet is a consolidated location to determine the value of a variable.
 * This gives a location where a system can request in terms of owning object
 * and variable name (string) and the conversion to VariableID is done
 * internally to this Facet in order to then get the result from the appropriate
 * VariableStore.
 */
public class ResultFacet
{

	private ScopeFacet scopeFacet;

	private VariableLibraryFacet variableLibraryFacet;

	private VariableStoreFacet variableStoreFacet;

	public Object getGlobalVariable(CharID id, String varName)
	{
		ScopeInstance scope = scopeFacet.getGlobalScope(id);
		VariableID<?> varID =
				variableLibraryFacet.getVariableID(id.getDatasetID(), scope,
						varName);
		return variableStoreFacet.getValue(id, varID);
	}

	public Object getLocalVariable(CharID id, CDOMObject cdo, String varName)
	{
		String localScopeName = cdo.getLocalScopeName();
		if (localScopeName == null)
		{
			return getGlobalVariable(id, varName);
		}

		ScopeInstance scope = scopeFacet.get(id, localScopeName, cdo);
		if (scope == null)
		{
			Logging.errorPrint("Improperly built "
					+ cdo.getClass().getSimpleName() + ": " + cdo.getKeyName()
					+ " had no VariableScope");
			return null;
		}
		VariableID<?> varID =
				variableLibraryFacet.getVariableID(id.getDatasetID(), scope,
						varName);
		return variableStoreFacet.getValue(id, varID);
	}

	public void setScopeFacet(ScopeFacet scopeFacet)
	{
		this.scopeFacet = scopeFacet;
	}

	public void setVariableLibraryFacet(
			VariableLibraryFacet variableLibraryFacet)
	{
		this.variableLibraryFacet = variableLibraryFacet;
	}

	public void setVariableStoreFacet(VariableStoreFacet variableStoreFacet)
	{
		this.variableStoreFacet = variableStoreFacet;
	}

}