package org.hwo.ui.tree;

import java.util.LinkedList;
import java.util.List;

import org.hwo.collections.SortedList;

public abstract class AutomatedTreeNode implements Comparable<AutomatedTreeNode>, AutomatedTreeNodeListener {
	
	AutomatedTreeNode				parent;
	LinkedList<AutomatedTreeNodeListener>
									automatedTreeNodeListeners;
	SortedList<AutomatedTreeNode>	children;
	
	
	
	public AutomatedTreeNode(AutomatedTreeNode parent){
		this.parent = parent;
		this.automatedTreeNodeListeners = new LinkedList<AutomatedTreeNodeListener>();
		this.children = new SortedList<AutomatedTreeNode>();
	}
	
	public void addAutomatedTreeNodeListener(AutomatedTreeNodeListener listener){
		this.automatedTreeNodeListeners.add(listener);
	};
	
	public void removeAutomatedTreeNodeListener(AutomatedTreeNodeListener listener){
		this.automatedTreeNodeListeners.remove(listener);		
	};
	
	private void fireChildInserted(AutomatedTreeNode parent,AutomatedTreeNode child){
		for (AutomatedTreeNodeListener l: automatedTreeNodeListeners){
			l.childInserted(parent, child);
		}
	}

	private void fireChildRemoved(AutomatedTreeNode parent,AutomatedTreeNode child, int index){
		for (AutomatedTreeNodeListener l: automatedTreeNodeListeners){
			l.childRemoved(parent, child, index);
		}		
	}
	
	public AutomatedTreeNode[] getChildren(){
		return children.toArray(new AutomatedTreeNode[0]);
	};
	
	public boolean	addChild(AutomatedTreeNode child){
		if (children.add(child)){
			child.addAutomatedTreeNodeListener(this);
			fireChildInserted(this,child);
			return true;
		}
		return false;
	};
	public boolean	removeChild(AutomatedTreeNode child){
		int index = children.indexOf(child);
		if (children.remove(child)){
			child.removeAutomatedTreeNodeListener(this);
			fireChildRemoved(this,child,index);
			return true;
		}
		return false;
	};
	
	public AutomatedTreeNode getChild(int index){
		return children.get(index);
	};
	
	public int getIndexOfChild(AutomatedTreeNode child){
		return children.indexOf(child);
	}
	
	public AutomatedTreeNode[] getPath(){
		List<AutomatedTreeNode> path = new LinkedList<AutomatedTreeNode>();
		getPath( path );
		return path.toArray(new AutomatedTreeNode[0]);
	}
	
	protected void getPath(List<AutomatedTreeNode> pathlist){
		if (this.parent != null)
			this.parent.getPath(pathlist);
		pathlist.add(this);
	}
	
	public boolean hasChild(AutomatedTreeNode child){
		return children.contains(child);
	}
	
	@Override
	public void childInserted(AutomatedTreeNode node, AutomatedTreeNode child) {
		fireChildInserted(node, child);		
	}
	@Override
	public void childRemoved(AutomatedTreeNode node, AutomatedTreeNode child, int index) {
		fireChildRemoved(node, child, index);
	}
	
}