package com.bluedragontavern;

import org.jdom.Document;
import org.jdom.Element;
import org.jdom.JDOMException;
import org.jdom.input.SAXBuilder;
import org.jdom.output.XMLOutputter;
import java.util.ArrayList;
import java.util.List;
import java.util.Iterator;
import java.util.Collections;
import java.io.File;
import java.io.FileWriter;
import com.bluedragontavern.Constants;
import com.bluedragontavern.SortElementsByName;

/**
 * Sort the Artists, Albums, and Songs in the dat.xml file
 */
public class SortXML
	{
	public static void main(String[] args)
		{
		 try
			{
			//Locate the dat.xml file
			File datFile = new File(Constants.CGIBIN + File.separator + Constants.DATFILE);

			//Build the JDOM
			SAXBuilder builder = new SAXBuilder();
			Document doc = builder.build(datFile);
			Element rootElem = doc.getRootElement();

			//Sort the Elements
         sortElements(rootElem);

			//Store the old file to a backup
			File datXML = new File(Constants.CGIBIN + File.separator + Constants.DATFILE);
			File bckDatXML = new File(Constants.CGIBIN + File.separator + Constants.DATFILE + "_bck");
			bckDatXML.delete();
			datXML.renameTo(bckDatXML);

			//Write out the new file
			File newDatXML = new File(Constants.CGIBIN + File.separator + Constants.DATFILE);
			FileWriter fw = new FileWriter(datXML);
			XMLOutputter xmlOutputter = new XMLOutputter("   ", true);
			xmlOutputter.setTextNormalize(true);
			xmlOutputter.output(doc, fw);
			fw.flush();
			fw.close();
			}
		catch (Exception e)
			{
			System.out.println(e.toString());
			e.printStackTrace(System.out);
			System.exit(1);
			}
		}

   /**
    * Recursively sort the Elements
    */
   private static void sortElements(Element element)
      {
      //Get the children
      List elements = element.getChildren();

      //Sort the children
      List sortableElements = new ArrayList();
      Iterator iter = elements.iterator();
      while(iter.hasNext())
         sortableElements.add(new SortElementsByName((Element)iter.next()));
      Collections.sort(sortableElements);
      elements.clear();
      iter = sortableElements.iterator();
      while(iter.hasNext())
         elements.add(((SortElementsByName)iter.next()).getElement());

      //Sort the grandchildren
      iter = elements.iterator();
      while(iter.hasNext())
         sortElements((Element)iter.next());
      }
	}