/*
 * PreKitTester.java
 * Copyright 2013 (C) James Dempsey <jdempsey@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
 *
 * Created on 27/10/2013
 *
 * $Id$
 */
package plugin.pretokens.test;

import pcgen.cdom.base.CDOMObject;
import pcgen.core.Globals;
import pcgen.core.Kit;
import pcgen.core.display.CharacterDisplay;
import pcgen.core.prereq.AbstractDisplayPrereqTest;
import pcgen.core.prereq.Prerequisite;
import pcgen.core.prereq.PrerequisiteException;
import pcgen.core.prereq.PrerequisiteTest;
import pcgen.system.LanguageBundle;

/**
 * Prerequisite tester, tests for the presence of a kit.
 *
 * @author James Dempsey <jdempsey@users.sourceforge.net>
 */
public class PreKitTester extends AbstractDisplayPrereqTest implements PrerequisiteTest
{

	private static final Class<Kit> KIT_CLASS = Kit.class;

	/* (non-Javadoc)
	 * @see pcgen.core.prereq.PrerequisiteTest#passes(pcgen.core.PlayerCharacter)
	 */
	@Override
	public int passes(final Prerequisite prereq, final CharacterDisplay display, CDOMObject source)
		throws PrerequisiteException
	{
		int runningTotal = 0;

		final int number;
		try
		{
			number = Integer.parseInt(prereq.getOperand());
		}
		catch (NumberFormatException exceptn)
		{
			throw new PrerequisiteException(LanguageBundle.getFormattedString(
				"PreKit.error", prereq.toString())); //$NON-NLS-1$
		}

		String kitKey = prereq.getKey().toUpperCase();
		final int wildCard = kitKey.indexOf('%');
		//handle wildcards (always assume they end the line)
		if (wildCard >= 0)
		{
			kitKey = kitKey.substring(0, wildCard);
			for (Kit kit : display.getKitInfo())
			{
				if (kit.getKeyName().toUpperCase().startsWith(
					kitKey))
				{
					runningTotal++;
				}
			}
		}
		else
		{
			Kit kit = Globals.getContext().getReferenceContext().silentlyGetConstructedCDOMObject(
					KIT_CLASS, kitKey);
			if (display.hasKit(kit))
			{
				runningTotal++;
			}
		}
		runningTotal = prereq.getOperator().compare(runningTotal, number);
		return countedTotal(prereq, runningTotal);
	}

	/**
	 * Get the type of prerequisite handled by this token.
	 * @return the type of prerequisite handled by this token.
	 */
    @Override
	public String kindHandled()
	{
		return "KIT"; //$NON-NLS-1$
	}

}