/*
 * Copyright 2015 (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.Set;
import java.util.TreeSet;

import pcgen.base.formula.base.LegalScope;
import pcgen.base.lang.CaseInsensitiveString;
import pcgen.base.lang.StringUtil;
import pcgen.cdom.base.CDOMObject;
import pcgen.cdom.base.Constants;
import pcgen.cdom.enumeration.MapKey;
import pcgen.rules.context.LoadContext;
import pcgen.rules.context.MapChanges;
import pcgen.rules.context.VariableContext;
import pcgen.rules.persistence.token.AbstractTokenWithSeparator;
import pcgen.rules.persistence.token.CDOMPrimaryToken;
import pcgen.rules.persistence.token.ParseResult;

public class InfoVarsLst extends AbstractTokenWithSeparator<CDOMObject>
		implements CDOMPrimaryToken<CDOMObject>
{
	@Override
	public String getTokenName()
	{
		return "INFOVARS";
	}

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

	@Override
	protected ParseResult parseTokenWithSeparator(LoadContext context,
		CDOMObject cdo, String value)
	{
		int pipeLoc = value.indexOf(Constants.PIPE);
		if (pipeLoc == -1)
		{
			return new ParseResult.Fail(getTokenName()
				+ " expecting '|', format is: InfoName|Info value was: "
				+ value, context);
		}
		String key = value.substring(0, pipeLoc);
		//key length 0 caught by charAt(0) test above
		String[] val = value.substring(pipeLoc + 1).split("\\|");
		VariableContext varContext = context.getVariableContext();
		for (String name : val)
		{
			LegalScope scope = context.getActiveScope().getLegalScope();
			if (!varContext.isLegalVariableID(scope, name))
			{
				return new ParseResult.Fail(getTokenName()
					+ " found an error. " + name
					+ " is not a legal variable name in scope "
					+ scope.getName() + " in " + cdo.getClass().getSimpleName()
					+ " " + cdo.getKeyName(), context);
			}
		}
		CaseInsensitiveString cis = new CaseInsensitiveString(key);
		context.getObjectContext().put(cdo, MapKey.INFOVARS, cis, val);
		return ParseResult.SUCCESS;
	}

	@Override
	public String[] unparse(LoadContext context, CDOMObject cdo)
	{
		MapChanges<CaseInsensitiveString, String[]> changes =
				context.getObjectContext().getMapChanges(cdo, MapKey.INFOVARS);
		if (changes == null || changes.isEmpty())
		{
			return null;
		}
		Set<String> set = new TreeSet<>();
		for (CaseInsensitiveString key : changes.getAdded().keySet())
		{
			String[] value = changes.getAdded().get(key);
			set.add(new StringBuilder().append(key).append(Constants.PIPE)
				.append(StringUtil.join(value, Constants.PIPE)).toString());
		}
		return set.toArray(new String[set.size()]);
	}

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

}