package de.ugoe.cs.eventbench.commands;

import java.awt.Dimension;
import java.awt.Rectangle;
import java.awt.Shape;
import java.security.InvalidParameterException;
import java.util.List;

import javax.swing.JFrame;

import org.apache.commons.collections15.Transformer;

import de.ugoe.cs.eventbench.CommandHelpers;
import de.ugoe.cs.eventbench.data.GlobalDataContainer;
import de.ugoe.cs.eventbench.models.FirstOrderMarkovModel;
import de.ugoe.cs.eventbench.models.FirstOrderMarkovModel.MarkovEdge;
import de.ugoe.cs.util.console.Command;
import de.ugoe.cs.util.console.Console;
import edu.uci.ics.jung.algorithms.layout.Layout;
import edu.uci.ics.jung.algorithms.layout.ISOMLayout;
import edu.uci.ics.jung.graph.Graph;
import edu.uci.ics.jung.visualization.BasicVisualizationServer;
import edu.uci.ics.jung.visualization.decorators.ToStringLabeller;
import edu.uci.ics.jung.visualization.renderers.Renderer.VertexLabel.Position;

/**
 * <p>
 * Command that visualizes first-order Markov models.
 * </p>
 * 
 * @author Steffen Herbold
 * @version 1.0
 */
public class CMDshowMarkovModel implements Command {

	/*
	 * (non-Javadoc)
	 * 
	 * @see de.ugoe.cs.util.console.Command#help()
	 */
	@Override
	public void help() {
		Console.println("Usage: showMarkovModel <modelName> {<showNodeNames>}");
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see de.ugoe.cs.util.console.Command#run(java.util.List)
	 */
	@Override
	public void run(List<Object> parameters) {
		String modelname;
		boolean showNodeNames = false;
		try {
			modelname = (String) parameters.get(0);
			if (parameters.size() == 2) {
				showNodeNames = Boolean
						.parseBoolean((String) parameters.get(1));
			}
		} catch (Exception e) {
			throw new InvalidParameterException();
		}

		Object dataObject = GlobalDataContainer.getInstance()
				.getData(modelname);
		if (dataObject == null) {
			CommandHelpers.objectNotFoundMessage(modelname);
			return;
		}
		if (!(dataObject instanceof FirstOrderMarkovModel)) {
			CommandHelpers.objectNotType(modelname, "FirstOrderMarkovModel");
			return;
		}
		FirstOrderMarkovModel mm = (FirstOrderMarkovModel) dataObject;

		Graph<String, MarkovEdge> graph = mm.getGraph();
		Layout<String, MarkovEdge> layout = new ISOMLayout<String, MarkovEdge>(
				graph);
		layout.setSize(new Dimension(1000, 800)); // sets the initial size
													// of the space
		// The BasicVisualizationServer<V,E> is parameterized by the edge
		// types
		BasicVisualizationServer<String, MarkovEdge> vv = new BasicVisualizationServer<String, MarkovEdge>(
				layout);
		vv.setPreferredSize(new Dimension(1100, 850)); // Sets the viewing
														// area size

		if (showNodeNames) {
			final Rectangle rect = new Rectangle(240, 20);

			Transformer<String, Shape> vertexShapeTransformer = new Transformer<String, Shape>() {
				public Shape transform(String s) {
					return rect;
				}
			};
			vv.getRenderer().getVertexLabelRenderer()
					.setPosition(Position.CNTR);
			vv.getRenderContext().setVertexShapeTransformer(
					vertexShapeTransformer);
			vv.getRenderContext().setVertexLabelTransformer(
					new ToStringLabeller<String>());
		}

		vv.getRenderContext().setEdgeLabelTransformer(
				new ToStringLabeller<MarkovEdge>());

		JFrame frame = new JFrame("Markov Model");
		frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
		frame.getContentPane().add(vv);
		frame.pack();
		frame.setVisible(true);
	}
}