/*
 * Copyright (C) 2009 eXo Platform SAS.
 *
 * This 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 software 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 software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */
package org.exoplatform.services.jcr.impl.tools.tree.generator;

import java.util.Random;

import javax.jcr.ItemExistsException;
import javax.jcr.Node;
import javax.jcr.PathNotFoundException;
import javax.jcr.RepositoryException;
import javax.jcr.lock.LockException;
import javax.jcr.nodetype.ConstraintViolationException;
import javax.jcr.version.VersionException;

/**
 * @author <a href="mailto:Sergey.Kabashnyuk@gmail.com">Sergey Kabashnyuk</a>
 * @version $Id: WeightNodeGenerator.java 11907 2008-03-13 15:36:21Z ksm $
 */
public class WeightNodeGenerator implements NodeGenerator
{
   private int maxDepth;

   private int maxWidth;

   protected Node currentNode;

   private static final Random random = new Random();

   public WeightNodeGenerator(int maxDepth, int maxWidth)
   {
      super();
      this.maxDepth = maxDepth;
      this.maxWidth = maxWidth;
   }

   public int getMaxDepth()
   {
      return maxDepth;
   }

   public void setMaxDepth(int maxDepth)
   {
      this.maxDepth = maxDepth;
   }

   public int getMaxWidth()
   {
      return maxWidth;
   }

   public void setMaxWidth(int maxWidth)
   {
      this.maxWidth = maxWidth;
   }

   protected void addNodes(Node parentNode, int level) throws ItemExistsException, PathNotFoundException,
      VersionException, ConstraintViolationException, LockException, RepositoryException
   {
      if (level >= maxDepth)
         return;
      // int maxNodesOnLevel = (int) Math.round((new Double(maxWidth) / new Double(maxDepth)) *
      // level);
      // maxNodesOnLevel = maxNodesOnLevel != 0 ? maxNodesOnLevel : 1;
      int maxNodesOnLevel = random.nextInt(maxWidth) + 1;
      for (int i = 0; i < maxNodesOnLevel; i++)
      {
         currentNode =
            parentNode.addNode("node_level_" + level + "_number_" + i + "_" + random.nextInt(Integer.MAX_VALUE));
         addProperties();
         addNodes(currentNode, level + 1);
      }
   }

   protected void addProperties() throws RepositoryException
   {

   }

   public void genereteTree(Node root) throws ItemExistsException, PathNotFoundException, VersionException,
      ConstraintViolationException, LockException, RepositoryException
   {
      addNodes(root, 1);
   }

}