/*
 * Copyright 2008 (C) Thomas Parker <thpr@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 plugin.lsttokens;

import java.util.Collection;
import java.util.StringTokenizer;

import pcgen.base.util.WeightedCollection;
import pcgen.cdom.base.CDOMObject;
import pcgen.cdom.base.Constants;
import pcgen.cdom.base.Ungranted;
import pcgen.cdom.enumeration.ListKey;
import pcgen.core.Movement;
import pcgen.rules.context.Changes;
import pcgen.rules.context.LoadContext;
import pcgen.rules.persistence.token.AbstractTokenWithSeparator;
import pcgen.rules.persistence.token.CDOMPrimaryToken;
import pcgen.rules.persistence.token.ParseResult;

/**
 * @author djones4
 * 
 */
public class MovecloneLst extends AbstractTokenWithSeparator<CDOMObject>
		implements CDOMPrimaryToken<CDOMObject>
{

	@Override
	public String getTokenName()
	{
		return "MOVECLONE";
	}

	@Override
	protected char separator()
	{
		return ',';
	}

	@Override
	protected ParseResult parseTokenWithSeparator(LoadContext context,
			CDOMObject obj, String value)
	{
		if (obj instanceof Ungranted)
		{
			return new ParseResult.Fail("Cannot use " + getTokenName()
				+ " on an Ungranted object type: "
				+ obj.getClass().getSimpleName(), context);
		}
		StringTokenizer moves = new StringTokenizer(value, Constants.COMMA);

		if (moves.countTokens() != 3)
		{
			return new ParseResult.Fail(
					"Invalid Version of MOVECLONE detected: " + value
							+ "\n  MOVECLONE has 3 arguments: "
							+ "SourceMove,DestinationMove,Modifier", context);
		}

		String oldType = moves.nextToken();
		String newType = moves.nextToken();
		String formulaString = moves.nextToken();

		if (formulaString.startsWith("/"))
		{
			try
			{
				int denom = Integer.parseInt(formulaString.substring(1));
				if (denom <= 0)
				{
					return new ParseResult.Fail(getTokenName()
							+ " was expecting a Positive Integer "
							+ "for dividing Movement, was : "
							+ formulaString.substring(1), context);
				}
			}
			catch (NumberFormatException e)
			{
				return new ParseResult.Fail(getTokenName()
						+ " was expecting an integer to follow /, was : "
						+ formulaString, context);
			}
		}
		else if (formulaString.startsWith("*"))
		{
			try
			{
				float mult = Float.parseFloat(formulaString.substring(1));
				if (mult < 0.0)
				{
					return new ParseResult.Fail(getTokenName()
							+ " was expecting a "
							+ "Float >= 0 for multiplying Movement, was : "
							+ formulaString.substring(1), context);
				}
			}
			catch (NumberFormatException e)
			{
				return new ParseResult.Fail(getTokenName()
						+ " was expecting an integer to follow *, was : "
						+ formulaString, context);
			}
		}
		else if (formulaString.startsWith("+"))
		{
			try
			{
				int add = Integer.parseInt(formulaString.substring(1));
				if (add < 0)
				{
					return new ParseResult.Fail(getTokenName()
							+ " was expecting a Non-Negative "
							+ "Integer for adding Movement, was : "
							+ formulaString.substring(1), context);
				}
			}
			catch (NumberFormatException e)
			{
				return new ParseResult.Fail(getTokenName()
						+ " was expecting an integer to follow +, was : "
						+ formulaString, context);
			}
		}
		else
		{
			try
			{
				Integer.parseInt(formulaString);
			}
			catch (NumberFormatException e)
			{
				return new ParseResult.Fail(getTokenName()
						+ " was expecting a Formula as the final value, was : "
						+ formulaString, context);
			}
		}
		Movement cm = new Movement(2);
		cm.assignMovement(0, oldType, "0");
		cm.assignMovement(1, newType, formulaString);
		cm.setMoveRatesFlag(2);
		context.getObjectContext().addToList(obj, ListKey.MOVEMENT, cm);
		return ParseResult.SUCCESS;
	}

	@Override
	public String[] unparse(LoadContext context, CDOMObject obj)
	{
		Changes<Movement> changes = context.getObjectContext().getListChanges(
				obj, ListKey.MOVEMENT);
		Collection<Movement> added = changes.getAdded();
		if (added == null || added.isEmpty())
		{
			// Zero indicates no Token
			return null;
		}
		WeightedCollection<String> set = new WeightedCollection<>(
				String.CASE_INSENSITIVE_ORDER);
		for (Movement m : added)
		{
			if (m.getMoveRatesFlag() == 2)
			{
				StringBuilder sb = new StringBuilder();
				m.addTokenContents(sb);
				set.add(sb.toString());
			}
		}
		if (set.isEmpty())
		{
			return null;
		}
		return set.toArray(new String[set.size()]);
	}

	@Override
	public Class<CDOMObject> getTokenClass()
	{
		return CDOMObject.class;
	}
}