package com.algomagic.atn;

import att.grappa.*;


public class NodeUpdate 
    extends AbstractUpdate 
    implements Update, VisualizationConstants 
{
    private String _name;
    private String _type;
    private String _cluster;

    private String _satisfied;
    private String _processed;

    private boolean _local;

    private NodeState _oldState;
    private boolean _newNode;

    public NodeUpdate( String name, 
		       String type,
		       String cluster,
		       String satisfied,
		       String processed,
		       int side,
		       boolean local ) {
	_name = name;
	_type = type;
	_cluster = cluster;
	_satisfied = satisfied;
	_processed = processed;
	_side = side;
	_local = local;
	_newNode = false;
    }

    public String toString( ) {
	return "NodeUpdate: " + _name + " " + _type + " " + _cluster + " " + _satisfied + " " + _processed;
    }


    public boolean getLocal( ) {
	return _local;
    }

    public int initialize( VisualizationPanel visPanel ) {
	Graph g = visPanel.getGraph( );

	Node n = g.findNodeByName( _name );
	boolean newNode;
	int changed;

	if( n == null ) {
	    new Node( g, _name );
	    NodeState ns = new NodeState( _name, _type );
	    changed = ns.updateState( this );

	    newNode = visPanel.addNodeState( ns );
	    _newNode = true;
	    return 3;

	} else {

	    NodeState ns = visPanel.getNodeState( _name );
	    changed = ns.updateState( this );

	    return changed;
	}

    }

    public Element getElement( VisualizationPanel visPanel ) {
	Graph g = visPanel.getGraph( );
	return g.findNodeByName( _name );
    }

    public boolean apply( VisualizationPanel visPanel ) {
	Graph g = visPanel.getGraph( );
	Node n = g.findNodeByName( _name );
	if( n != null ) {
	    NodeState ns = visPanel.getNodeState( _name );
	    _oldState = new NodeState( ns );

	    ns.updateState( this );
	    visPanel.setNodeProperties( n, ns, _local, _newNode );
	    return true;
	}
	return false;
    }

    public void undo( VisualizationPanel visPanel ) {
	if( _oldState == null ) {
	    throw new RuntimeException( );
	}
	
	Graph g = visPanel.getGraph( );
	Node n = g.findNodeByName( _name );

	if( n == null ) {
	    throw new RuntimeException( );
	}

	NodeState ns = visPanel.getNodeState( _name );
	ns.setHidden( _oldState.getHidden( ) );
	ns.setSatisfied( _oldState.getSatisfied( ) );

	visPanel.setNodeProperties( n, _oldState, _local, _newNode );

    }

    public String getName( ) {
	return _name;
    }

    public String getSatisfied( ) {
	return _satisfied;
    }

    public String getProcessed( ) {
	return _processed;
    }

    public void setNew( ) {
	_newNode = true;
    }


}