//   Copyright 2012 Georg-August-Universität Göttingen, Germany
//
//   Licensed under the Apache License, Version 2.0 (the "License");
//   you may not use this file except in compliance with the License.
//   You may obtain a copy of the License at
//
//       http://www.apache.org/licenses/LICENSE-2.0
//
//   Unless required by applicable law or agreed to in writing, software
//   distributed under the License is distributed on an "AS IS" BASIS,
//   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
//   See the License for the specific language governing permissions and
//   limitations under the License.

package de.ugoe.cs.autoquest.commands.usage;

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

import javax.swing.JFrame;

import org.apache.commons.collections15.Transformer;

import de.ugoe.cs.autoquest.CommandHelpers;
import de.ugoe.cs.autoquest.usageprofiles.Trie;
import de.ugoe.cs.autoquest.usageprofiles.TrieBasedModel;
import de.ugoe.cs.autoquest.usageprofiles.Trie.Edge;
import de.ugoe.cs.autoquest.usageprofiles.Trie.TrieVertex;
import de.ugoe.cs.util.console.Command;
import de.ugoe.cs.util.console.GlobalDataContainer;
import edu.uci.ics.jung.algorithms.layout.Layout;
import edu.uci.ics.jung.algorithms.layout.TreeLayout;
import edu.uci.ics.jung.graph.Tree;
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 the {@link Trie} of a {@link TrieBasedModel}.
 * </p>
 * 
 * @author Steffen Herbold
 * @version 1.0
 */
public class CMDshowTrie implements Command {

	/*
	 * (non-Javadoc)
	 * 
	 * @see de.ugoe.cs.util.console.Command#help()
	 */
	@Override
	public String help() {
		return "showTrie <modelname>";
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see de.ugoe.cs.util.console.Command#run(java.util.List)
	 */
	@Override
	public void run(List<Object> parameters) {
		String modelname;
		try {
			modelname = (String) parameters.get(0);
		} catch (Exception e) {
			throw new IllegalArgumentException();
		}

		Object dataObject = GlobalDataContainer.getInstance()
				.getData(modelname);
		if (dataObject == null) {
			CommandHelpers.objectNotFoundMessage(modelname);
			return;
		}
		if (!(dataObject instanceof TrieBasedModel)) {
			CommandHelpers.objectNotType(modelname, "TrieBasedModel");
		}
		TrieBasedModel model = (TrieBasedModel) dataObject;
		Tree<TrieVertex, Edge> graph = model.getTrieGraph();
		Layout<TrieVertex, Edge> layout = new TreeLayout<TrieVertex, Edge>(
				graph, 60);
		// The BasicVisualizationServer<V,E> is parameterized by the edge
		// types
		BasicVisualizationServer<TrieVertex, Edge> vv = new BasicVisualizationServer<TrieVertex, Edge>(
				layout);
		vv.setPreferredSize(new Dimension(1100, 850)); // Sets the viewing
														// area size

		final Rectangle rect = new Rectangle(40, 20);

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

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

}