/*
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2, 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
 * 02111-1307, USA.
 *
 * http://www.gnu.org/copyleft/gpl.html
 */
package com.l2jfrozen.gameserver.script.faenor;

import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Locale;

import javax.script.ScriptContext;

import org.w3c.dom.Node;
import org.w3c.dom.NodeList;

import com.l2jfrozen.Config;
import com.l2jfrozen.gameserver.script.Parser;

/**
 * @author Luis Arias
 */
public abstract class FaenorParser extends Parser
{
	protected static FaenorInterface _bridge = FaenorInterface.getInstance();
	protected static final DateFormat DATE_FORMAT = new SimpleDateFormat("dd MMM yyyy", Locale.US);

	public final static boolean DEBUG = true;

	/*
	 * UTILITY FUNCTIONS
	 */
	public static String attribute(Node node, String attributeName)
	{
		return attribute(node, attributeName, null);
	}

	public static String element(Node node, String elementName)
	{
		return element(node, elementName, null);
	}

	public static String attribute(Node node, String attributeName, String defaultValue)
	{
		try
		{
			return node.getAttributes().getNamedItem(attributeName).getNodeValue();
		}
		catch(Exception e)
		{
			if(Config.ENABLE_ALL_EXCEPTIONS)
				e.printStackTrace();
			
			if(defaultValue != null)
				return defaultValue;
			throw new NullPointerException("FaenorParser: attribute " + e.getMessage());
		}
	}

	public static String element(Node parentNode, String elementName, String defaultValue)
	{
		try
		{
			NodeList list = parentNode.getChildNodes();
			for(int i = 0; i < list.getLength(); i++)
			{
				Node node = list.item(i);
				if(node.getNodeName().equalsIgnoreCase(elementName))
					return node.getTextContent();
			}
		}
		catch(Exception e)
		{
			if(Config.ENABLE_ALL_EXCEPTIONS)
				e.printStackTrace();
		}
		if(defaultValue != null)
			return defaultValue;
		throw new NullPointerException();

	}

	public static boolean isNodeName(Node node, String name)
	{
		return node.getNodeName().equalsIgnoreCase(name);
	}

	public static Date getDate(String date) throws ParseException
	{
		return DATE_FORMAT.parse(date);
	}

	public static double getPercent(String percent)
	{
		return Double.parseDouble(percent.split("%")[0]) / 100.0;
	}

	protected static int getInt(String number)
	{
		return Integer.parseInt(number);
	}

	protected static double getDouble(String number)
	{
		return Double.parseDouble(number);
	}

	protected static float getFloat(String number)
	{
		return Float.parseFloat(number);
	}

	protected static String getParserName(String name)
	{
		return "faenor.Faenor" + name + "Parser";
	}

	/**
	 * @param script
	 */
	@Override
	public abstract void parseScript(Node node, ScriptContext context);
}
