/*
 * Moonlight|3D Copyright (C) 2005 The Moonlight|3D team
 * 
 * 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.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 * 
 * Created on Dec 29, 2005
 */
package ml.core.preferences;

import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.transform.Result;
import javax.xml.transform.Source;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerConfigurationException;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.TransformerFactoryConfigurationError;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;

import ml.core.exceptions.Exception;

import org.w3c.dom.DOMException;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.NodeList;
import org.xml.sax.SAXException;

public class Preferences implements Cloneable {
	protected ArrayList<PreferencesGroup> preferencesGroups;
	
	public Preferences() {
		preferencesGroups=new ArrayList<PreferencesGroup>();
	}
	
	public void addPreferencesGroup(PreferencesGroup preferencesGroup) {
		preferencesGroups.add(preferencesGroup);
	}
	
	public void setFrom(Preferences preferences) {
		for(PreferencesGroup group : preferencesGroups) {
			for(PreferencesGroup otherGroup : preferences.preferencesGroups) {
				if(group.getName().equals(otherGroup.getName())) {
					group.setFrom(otherGroup);
				}
			}
		}
	}
	
	public void loadFromFile(String filename) throws SAXException, IOException, ParserConfigurationException {
		Document preferencesDoc = DocumentBuilderFactory.newInstance().newDocumentBuilder().parse(new File(filename).toURI().toString());

		Element root = preferencesDoc.getDocumentElement();
		NodeList groupList = root.getElementsByTagName("group");
		for (int i = 0; i < groupList.getLength(); i++) {
			Element groupNode = (Element) groupList.item(i);
			PreferencesGroup group = new PreferencesGroup();
			group.setName(groupNode.getAttribute("name"));

			group.readFromFile(groupNode);

			preferencesGroups.add(group);
		}
	}
	
	public void saveToFile(String filename) {
		try {
			Document preferencesDoc;
			preferencesDoc = DocumentBuilderFactory.newInstance().newDocumentBuilder().newDocument();
			// generate save file DOM tree here
			Element root = preferencesDoc.createElement("preferences");
			preferencesDoc.appendChild(root);
			
			for(PreferencesGroup group : preferencesGroups) {
				group.saveToFile(preferencesDoc,root);
			}

			Source domSource = new DOMSource(preferencesDoc);
			Result streamResult = new StreamResult(new File(filename));
			Transformer transformer = TransformerFactory.newInstance().newTransformer();
			transformer.transform(domSource, streamResult);
		} catch (ParserConfigurationException e) {
			e.printStackTrace();
		} catch (TransformerConfigurationException e) {
			e.printStackTrace();
		} catch (TransformerFactoryConfigurationError e) {
			e.printStackTrace();
		} catch (TransformerException e) {
			e.printStackTrace();
		} catch (DOMException e) {
			e.printStackTrace();
		} catch (Exception e) {
			e.printStackTrace();
		}
        
		
	}

	public List<PreferencesGroup> getGroups() {
		return preferencesGroups;
	}

	public PreferencesGroup getGroupByName(String itemName) {
		for(PreferencesGroup group : preferencesGroups) {
			if(group.getName().equals(itemName)) {
				return group;
			}
		}
		return null;
	}
	
	@Override
	public Preferences clone() {
		Preferences preferences=new Preferences();
		
		preferences.preferencesGroups=new ArrayList<PreferencesGroup>();
		
		for(PreferencesGroup group : preferencesGroups) {
			preferences.preferencesGroups.add(group.clone());
		}
		
		return preferences;
	}
}