package org.insa.graphics;

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Component;
import java.awt.Dimension;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.PrintStream;
import java.util.ArrayList;
import java.util.List;

import javax.swing.BorderFactory;
import javax.swing.Box;
import javax.swing.BoxLayout;
import javax.swing.JButton;
import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JSplitPane;
import javax.swing.JTextArea;
import javax.swing.KeyStroke;
import javax.swing.SwingConstants;
import javax.swing.Timer;
import javax.swing.UIManager;
import javax.swing.border.CompoundBorder;
import javax.swing.border.EmptyBorder;
import javax.swing.filechooser.FileNameExtensionFilter;

import org.insa.algo.shortestpath.ShortestPathAlgorithm;
import org.insa.algo.shortestpath.ShortestPathAlgorithmFactory;
import org.insa.algo.shortestpath.ShortestPathData;
import org.insa.algo.shortestpath.ShortestPathData.Mode;
import org.insa.algo.shortestpath.ShortestPathGraphicObserver;
import org.insa.algo.shortestpath.ShortestPathSolution;
import org.insa.algo.weakconnectivity.WeaklyConnectedComponentGraphicObserver;
import org.insa.algo.weakconnectivity.WeaklyConnectedComponentTextObserver;
import org.insa.algo.weakconnectivity.WeaklyConnectedComponentsAlgorithm;
import org.insa.algo.weakconnectivity.WeaklyConnectedComponentsData;
import org.insa.graph.Graph;
import org.insa.graph.Path;
import org.insa.graph.io.BinaryGraphReader;
import org.insa.graph.io.BinaryGraphReaderV2;
import org.insa.graph.io.BinaryPathReader;
import org.insa.graph.io.BinaryPathWriter;
import org.insa.graph.io.GraphReader;
import org.insa.graph.io.MapMismatchException;
import org.insa.graphics.ShortestPathPanel.StartActionEvent;
import org.insa.graphics.drawing.BasicDrawing;
import org.insa.graphics.drawing.BasicGraphPalette;
import org.insa.graphics.drawing.BlackAndWhiteGraphPalette;
import org.insa.graphics.drawing.Drawing;
import org.insa.graphics.drawing.GraphPalette;
import org.insa.graphics.drawing.MapViewDrawing;
import org.insa.graphics.drawing.overlays.PathOverlay;

public class MainWindow extends JFrame {

    /**
     * 
     */
    private static final long serialVersionUID = -527660583705140687L;

    /**
     * 
     */
    private static final String WINDOW_TITLE = "BE Graphes INSA";

    /**
     * 
     */
    private static final int THREAD_TIMER_DELAY = 1000; // in milliseconds

    // Current graph.
    protected Graph graph;

    // Path to the last opened graph file.
    private String graphFilePath;

    // Drawing and click adapter.
    protected Drawing drawing;
    private MapViewDrawing mapViewDrawing;
    private BasicDrawing basicDrawing;

    // Main panel.
    private JSplitPane mainPanel;

    // Shortest path panel
    private ShortestPathPanel spPanel;

    // List of item for the top menus.
    private JMenuItem openMapItem;

    // List of items that cannot be used without a graph
    private ArrayList<JMenuItem> graphLockItems = new ArrayList<JMenuItem>();

    // Label containing the map ID of the current graph.
    private JLabel graphInfoPanel;

    // Thread information
    private Timer threadTimer;
    private JPanel threadPanel;

    // Log stream and print stream
    private StreamCapturer logStream;

    @SuppressWarnings("unused")
    private PrintStream printStream;

    // Current running thread
    private ThreadWrapper currentThread;

    // Factory
    private BlockingActionFactory baf;

    // Observers
    private List<DrawingChangeListener> drawingChangeListeners = new ArrayList<>();
    private List<GraphChangeListener> graphChangeListeneres = new ArrayList<>();

    public MainWindow() {
        super(WINDOW_TITLE);

        setDefaultCloseOperation(JFrame.DO_NOTHING_ON_CLOSE);
        setLayout(new BorderLayout());

        // Create drawing and action listeners...
        this.basicDrawing = new BasicDrawing();
        this.mapViewDrawing = new MapViewDrawing();

        this.drawing = this.basicDrawing;

        spPanel = new ShortestPathPanel();
        spPanel.addStartActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                StartActionEvent evt = (StartActionEvent) e;
                ShortestPathData data = new ShortestPathData(graph, evt.getOrigin(), evt.getDestination(),
                        evt.getMode());
                try {
                    ShortestPathAlgorithm spAlgorithm = ShortestPathAlgorithmFactory
                            .createAlgorithm(evt.getAlgorithmClass(), data);
                    spPanel.setEnabled(false);
                    launchShortestPathThread(spAlgorithm);
                }
                catch (Exception e1) {
                    JOptionPane.showMessageDialog(MainWindow.this,
                            "An error occurred while creating the specified algorithm.",
                            "Internal error: Algorithm instantiation failure", JOptionPane.ERROR_MESSAGE);
                    e1.printStackTrace();
                }
            }
        });
        spPanel.setVisible(false);

        // Add click listeners to both drawing.
        basicDrawing.addDrawingClickListener(spPanel.nodesInputPanel);
        mapViewDrawing.addDrawingClickListener(spPanel.nodesInputPanel);

        this.graphChangeListeneres.add(spPanel.nodesInputPanel);
        this.drawingChangeListeners.add(spPanel.nodesInputPanel);

        // Create action factory.
        this.currentThread = new ThreadWrapper(this);
        this.baf = new BlockingActionFactory(this);
        this.baf.addAction(currentThread);

        // Click adapter
        setJMenuBar(createMenuBar());

        addWindowListener(new WindowAdapter() {
            public void windowClosing(WindowEvent e) {
                int confirmed = JOptionPane.showConfirmDialog(null, "Are you sure you want to close the application?",
                        "Exit Confirmation", JOptionPane.YES_NO_OPTION);

                if (confirmed == JOptionPane.YES_OPTION) {
                    dispose();
                    System.exit(0);
                }
            }
        });

        // Create graph area
        mainPanel = new JSplitPane(JSplitPane.HORIZONTAL_SPLIT);

        JTextArea infoPanel = new JTextArea();
        infoPanel.setMinimumSize(new Dimension(200, 50));
        infoPanel.setBackground(Color.WHITE);
        infoPanel.setLineWrap(true);
        infoPanel.setEditable(false);
        this.logStream = new StreamCapturer(infoPanel);
        this.printStream = new PrintStream(this.logStream);

        JPanel rightComponent = new JPanel();
        rightComponent.setLayout(new GridBagLayout());

        GridBagConstraints c = new GridBagConstraints();
        c.gridx = 0;
        c.gridy = 0;
        c.fill = GridBagConstraints.HORIZONTAL;
        rightComponent.add(spPanel, c);

        c = new GridBagConstraints();
        c.gridx = 0;
        c.gridy = 2;
        c.weightx = 1;
        c.weighty = 1;
        c.fill = GridBagConstraints.BOTH;
        c.gridheight = GridBagConstraints.REMAINDER;
        rightComponent.add(new JScrollPane(infoPanel), c);

        mainPanel.setResizeWeight(0.8);
        mainPanel.setDividerSize(5);

        mainPanel.setBackground(Color.WHITE);
        mainPanel.setLeftComponent((Component) this.drawing);
        mainPanel.setRightComponent(rightComponent);
        this.add(mainPanel, BorderLayout.CENTER);

        // Top Panel
        this.add(createStatusBar(), BorderLayout.SOUTH);

        // Notify everythin
        notifyDrawingLoaded(null, drawing);
    }

    /**
     * @param runnable
     * @param canInterrupt
     */
    private void launchThread(Runnable runnable, boolean canInterrupt) {
        if (canInterrupt) {
            currentThread.setThread(new Thread(new Runnable() {
                @Override
                public void run() {
                    threadTimer.restart();
                    threadPanel.setVisible(true);
                    runnable.run();
                    clearCurrentThread();
                }
            }));
        }
        else {
            currentThread.setThread(new Thread(runnable));
        }
        currentThread.startThread();
    }

    private void launchThread(Runnable runnable) {
        launchThread(runnable, true);
    }

    protected void clearCurrentThread() {
        threadTimer.stop();
        threadPanel.setVisible(false);
        currentThread.setThread(null);
        if (spPanel != null) {
            spPanel.setEnabled(true);
        }
    }

    private void displayShortestPathSolution(ShortestPathSolution solution) {
        JPanel infoPanel = new JPanel();
        infoPanel.setLayout(new BoxLayout(infoPanel, BoxLayout.PAGE_AXIS));
        infoPanel.setBorder(new CompoundBorder(BorderFactory.createMatteBorder(1, 0, 0, 0, Color.BLACK),
                new EmptyBorder(15, 15, 15, 15)));

        ShortestPathData data = (ShortestPathData) solution.getInstance();

        String info = null;
        if (solution == null || !solution.isFeasible()) {
            info = String.format("Shortest path: No path found from node #%d to node #%d.", data.getOrigin().getId(),
                    data.getDestination().getId());
        }
        else {
            info = String.format("Shortest path: Found a path from node #%d to node #%d", data.getOrigin().getId(),
                    data.getDestination().getId());
            if (data.getMode() == Mode.LENGTH) {
                info = String.format("%s, %.2f kilometers.", info, (solution.getPath().getLength() / 1000.0));
            }
            else {
                info = String.format("%s, %.2f minutes.", info, (solution.getPath().getMinimumTravelTime() / 60.0));
            }
        }
        infoPanel.add(new JLabel(info));

        if (solution != null && solution.isFeasible()) {
            infoPanel.add(Box.createVerticalStrut(8));

            PathOverlay overlay = drawing.drawPath(solution.getPath());

            JPanel buttonPanel = new JPanel();
            buttonPanel.setLayout(new BoxLayout(buttonPanel, BoxLayout.LINE_AXIS));
            buttonPanel.add(Box.createHorizontalGlue());
            JButton clearButton = new JButton("Hide");
            clearButton.addActionListener(new ActionListener() {

                private PathOverlay thisOverlay = overlay;

                @Override
                public void actionPerformed(ActionEvent e) {
                    if (thisOverlay.isVisible()) {
                        thisOverlay.setVisible(false);
                        clearButton.setText("Show");
                    }
                    else {
                        thisOverlay.setVisible(true);
                        clearButton.setText("Hide");
                    }
                }
            });
            JButton saveButton = new JButton("Save");
            saveButton.addActionListener(new ActionListener() {
                @Override
                public void actionPerformed(ActionEvent e) {
                    String filepath = System.getProperty("user.dir");
                    filepath += File.separator + String.format("path_%#x_%d_%d.path", graph.getMapId(),
                            data.getOrigin().getId(), data.getDestination().getId());
                    JFileChooser fileChooser = new JFileChooser();
                    fileChooser.setSelectedFile(new File(filepath));
                    fileChooser.setApproveButtonText("Save");

                    if (fileChooser.showOpenDialog(MainWindow.this) == JFileChooser.APPROVE_OPTION) {
                        File file = fileChooser.getSelectedFile();
                        try {
                            BinaryPathWriter writer = new BinaryPathWriter(
                                    new DataOutputStream(new BufferedOutputStream(new FileOutputStream(file))));
                            writer.writePath(solution.getPath());
                        }
                        catch (IOException e1) {
                            JOptionPane.showMessageDialog(MainWindow.this,
                                    "Unable to write path to the selected file.");
                            e1.printStackTrace();
                        }
                    }
                }
            });
            buttonPanel.add(clearButton);
            buttonPanel.add(saveButton);
            infoPanel.add(buttonPanel);

        }

        // Add panel to the right side
        GridBagConstraints c = new GridBagConstraints();
        c.gridx = 0;
        c.gridy = 1;
        c.fill = GridBagConstraints.HORIZONTAL;
        ((JPanel) mainPanel.getRightComponent()).add(infoPanel, c);

    }

    private void launchShortestPathThread(ShortestPathAlgorithm spAlgorithm) {
        spAlgorithm.addObserver(new ShortestPathGraphicObserver(drawing));
        // algo.addObserver(new ShortestPathTextObserver(printStream));
        launchThread(new Runnable() {
            @Override
            public void run() {
                ShortestPathSolution solution = spAlgorithm.run();
                displayShortestPathSolution(solution);
            }
        });
    }

    /**
     * Notify all listeners that a new graph has been loaded.
     */
    private void notifyNewGraphLoaded() {
        for (GraphChangeListener listener: graphChangeListeneres) {
            listener.newGraphLoaded(graph);
        }
    }

    /**
     * Notify all listeners that a new drawing has been set up.
     * 
     * @param oldDrawing
     * @param newDrawing
     */
    private void notifyDrawingLoaded(Drawing oldDrawing, Drawing newDrawing) {
        for (DrawingChangeListener listener: drawingChangeListeners) {
            listener.onDrawingLoaded(oldDrawing, newDrawing);
        }
    }

    /**
     * Notify all listeners that a redraw request is emitted.
     */
    private void notifyRedrawRequest() {
        for (DrawingChangeListener listener: drawingChangeListeners) {
            listener.onRedrawRequest();
        }
    }

    /**
     * Draw the stored graph on the drawing.
     */
    private void drawGraph(Class<? extends Drawing> newClass, GraphPalette palette) {
        // Save old divider location
        int oldLocation = mainPanel.getDividerLocation();

        boolean isNewGraph = newClass == null;
        boolean isMapView = (isNewGraph && drawing == mapViewDrawing)
                || (!isNewGraph && newClass.equals(MapViewDrawing.class));

        // We need to draw MapView, we have to check if the file exists.
        File mfile = null;
        if (isMapView) {
            String mfpath = graphFilePath.substring(0, graphFilePath.lastIndexOf(".map")) + ".mapfg";
            mfile = new File(mfpath);
            if (!mfile.exists()) {
                if (JOptionPane.showConfirmDialog(this,
                        "The associated mapsforge (.mapfg) file has not been found, do you want to specify it manually?",
                        "File not found", JOptionPane.YES_NO_CANCEL_OPTION) == JOptionPane.YES_OPTION) {
                    JFileChooser chooser = new JFileChooser(mfile.getParentFile());
                    if (chooser.showOpenDialog(this) == JFileChooser.APPROVE_OPTION) {
                        mfile = chooser.getSelectedFile();
                    }
                    else {
                        mfile = null;
                    }
                }
                else {
                    mfile = null;
                }
            }
        }

        if (isMapView && mfile != null) {
            // It is a mapview drawing and the file was found, so:
            // 1. We create the drawing if necessary.
            if (drawing != mapViewDrawing) {
                drawing.clear();
                drawing = mapViewDrawing;
                mainPanel.setLeftComponent(mapViewDrawing);
                mainPanel.setDividerLocation(oldLocation);
                notifyDrawingLoaded(basicDrawing, mapViewDrawing);
            }

            // 2. We draw the graph.
            drawing.clear();
            ((MapViewDrawing) drawing).drawGraph(mfile);
            notifyRedrawRequest();

        }
        else if (!isMapView || (isMapView && mfile == null && isNewGraph)) {
            if (drawing == mapViewDrawing) {
                mapViewDrawing.clear();
                drawing = basicDrawing;
                mainPanel.setLeftComponent(basicDrawing);
                mainPanel.setDividerLocation(oldLocation);
                notifyDrawingLoaded(mapViewDrawing, basicDrawing);
            }
            drawing.clear();
            drawing.drawGraph(graph, palette);
            notifyRedrawRequest();
        }

    }

    private void drawGraph(Class<? extends Drawing> newClass) {
        drawGraph(newClass, new BasicGraphPalette());
    }

    private void drawGraph() {
        drawGraph(null, new BasicGraphPalette());
    }

    private JMenuBar createMenuBar() {

        // Open Map item...
        openMapItem = new JMenuItem("Open Map... ", KeyEvent.VK_O);
        openMapItem.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_O, ActionEvent.ALT_MASK));
        openMapItem.addActionListener(baf.createBlockingAction(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                JFileChooser chooser = new JFileChooser();
                FileNameExtensionFilter filter = new FileNameExtensionFilter("Map & compressed map files", "map",
                        "map2", "mapgr", "map.gz");
                chooser.setCurrentDirectory(new File(System.getProperty("user.dir")));
                chooser.setFileFilter(filter);
                if (chooser.showOpenDialog(MainWindow.this) == JFileChooser.APPROVE_OPTION) {
                    launchThread(new Runnable() {
                        @Override
                        public void run() {
                            String path = chooser.getSelectedFile().getAbsolutePath();
                            DataInputStream stream;
                            try {
                                stream = new DataInputStream(
                                        new BufferedInputStream(new FileInputStream(chooser.getSelectedFile())));
                            }
                            catch (IOException e1) {
                                JOptionPane.showMessageDialog(MainWindow.this, "Cannot open the selected file.");
                                return;
                            }
                            GraphReader reader;
                            if (path.endsWith(".map2") || path.endsWith("mapgr")) {
                                reader = new BinaryGraphReaderV2(stream);
                            }
                            else {
                                reader = new BinaryGraphReader(stream);
                            }
                            try {
                                graph = reader.read();
                            }
                            catch (Exception exception) {
                                JOptionPane.showMessageDialog(MainWindow.this,
                                        "Unable to read graph from the selected file.");
                                exception.printStackTrace(System.out);
                                return;
                            }
                            notifyNewGraphLoaded();

                            // Save file path.
                            graphFilePath = path;

                            graphInfoPanel.setText(
                                    String.format("Map ID: %#x, %d nodes", graph.getMapId(), graph.getNodes().size()));
                            drawGraph();

                            for (JMenuItem item: graphLockItems) {
                                item.setEnabled(true);
                            }
                        }
                    }, false);
                }
            }
        }));

        // Open Path item...
        JMenuItem openPathItem = new JMenuItem("Open Path... ", KeyEvent.VK_P);
        openPathItem.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_P, ActionEvent.ALT_MASK));
        openPathItem.addActionListener(baf.createBlockingAction(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                JFileChooser chooser = new JFileChooser();
                FileNameExtensionFilter filter = new FileNameExtensionFilter("Path & compressed path files", "path",
                        "path.gz");
                chooser.setCurrentDirectory(new File(System.getProperty("user.dir")));
                chooser.setFileFilter(filter);
                if (chooser.showOpenDialog(MainWindow.this) == JFileChooser.APPROVE_OPTION) {
                    BinaryPathReader reader;
                    try {
                        reader = new BinaryPathReader(new DataInputStream(
                                new BufferedInputStream(new FileInputStream(chooser.getSelectedFile()))));
                    }
                    catch (IOException e1) {
                        JOptionPane.showMessageDialog(MainWindow.this, "Cannot open the selected file.");
                        return;
                    }
                    try {
                        Path path = reader.readPath(graph);
                        drawing.drawPath(path);
                    }
                    catch (MapMismatchException exception) {
                        JOptionPane.showMessageDialog(MainWindow.this,
                                "The selected file does not contain a path for the current graph.");
                        return;
                    }
                    catch (Exception exception) {
                        JOptionPane.showMessageDialog(MainWindow.this, "Unable to read path from the selected file.");
                        return;
                    }
                }
            }
        }));
        graphLockItems.add(openPathItem);

        // Close item
        JMenuItem closeItem = new JMenuItem("Quit", KeyEvent.VK_Q);
        closeItem.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_Q, ActionEvent.ALT_MASK));
        closeItem.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                MainWindow.this.dispatchEvent(new WindowEvent(MainWindow.this, WindowEvent.WINDOW_CLOSING));
            }
        });

        // Build the first menu.
        JMenu fileMenu = new JMenu("File");
        fileMenu.add(openMapItem);
        fileMenu.add(openPathItem);
        fileMenu.addSeparator();
        fileMenu.add(closeItem);

        // Second menu
        JMenuItem drawGraphItem = new JMenuItem("Redraw", KeyEvent.VK_R);
        drawGraphItem.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_R, ActionEvent.ALT_MASK));
        drawGraphItem.addActionListener(baf.createBlockingAction(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                launchThread(new Runnable() {
                    @Override
                    public void run() {
                        drawGraph(BasicDrawing.class);
                    }
                });
            }
        }));
        graphLockItems.add(drawGraphItem);
        JMenuItem drawGraphBWItem = new JMenuItem("Redraw (B&W)", KeyEvent.VK_B);
        drawGraphBWItem.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_B, ActionEvent.ALT_MASK));
        drawGraphBWItem.addActionListener(baf.createBlockingAction(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                launchThread(new Runnable() {
                    @Override
                    public void run() {
                        drawGraph(BasicDrawing.class, new BlackAndWhiteGraphPalette());
                    }
                });
            }
        }));
        graphLockItems.add(drawGraphBWItem);
        JMenuItem drawGraphMapsforgeItem = new JMenuItem("Redraw (Map)", KeyEvent.VK_M);
        drawGraphMapsforgeItem.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_M, ActionEvent.ALT_MASK));
        drawGraphMapsforgeItem.addActionListener(baf.createBlockingAction(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                launchThread(new Runnable() {
                    @Override
                    public void run() {
                        drawGraph(MapViewDrawing.class);
                    }
                });
            }
        }));
        graphLockItems.add(drawGraphMapsforgeItem);

        JMenu graphMenu = new JMenu("Graph");
        graphMenu.add(drawGraphItem);
        graphMenu.add(drawGraphBWItem);
        graphMenu.addSeparator();
        graphMenu.add(drawGraphMapsforgeItem);

        // Algo menu
        JMenu algoMenu = new JMenu("Algorithms");

        // Weakly connected components
        JMenuItem wccItem = new JMenuItem("Weakly Connected Components");
        wccItem.addActionListener(baf.createBlockingAction(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                WeaklyConnectedComponentsData instance = new WeaklyConnectedComponentsData(graph);
                WeaklyConnectedComponentsAlgorithm algo = new WeaklyConnectedComponentsAlgorithm(instance);
                algo.addObserver(new WeaklyConnectedComponentGraphicObserver(drawing));
                algo.addObserver(new WeaklyConnectedComponentTextObserver(printStream));
                launchThread(new Runnable() {
                    @Override
                    public void run() {
                        algo.run();
                    }
                });
            }
        }));

        // Shortest path
        JMenuItem spItem = new JMenuItem("Shortest Path");
        spItem.addActionListener(baf.createBlockingAction(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                int dividerLocation = mainPanel.getDividerLocation();
                spPanel.setVisible(true);
                mainPanel.setDividerLocation(dividerLocation);
            }
        }));
        graphLockItems.add(wccItem);
        graphLockItems.add(spItem);

        algoMenu.add(wccItem);
        algoMenu.addSeparator();
        algoMenu.add(spItem);

        // Create the menu bar.
        JMenuBar menuBar = new JMenuBar();

        menuBar.add(fileMenu);
        menuBar.add(graphMenu);
        menuBar.add(algoMenu);

        for (JMenuItem item: graphLockItems) {
            item.setEnabled(false);
        }

        return menuBar;
    }

    private JPanel createStatusBar() {
        // create the status bar panel and shove it down the bottom of the frame
        JPanel statusPanel = new JPanel();
        statusPanel.setBorder(new CompoundBorder(BorderFactory.createMatteBorder(1, 0, 0, 0, Color.GRAY),
                new EmptyBorder(0, 15, 0, 15)));
        statusPanel.setPreferredSize(new Dimension(getWidth(), 38));
        statusPanel.setLayout(new BorderLayout());

        graphInfoPanel = new JLabel();
        graphInfoPanel.setHorizontalAlignment(SwingConstants.LEFT);
        statusPanel.add(graphInfoPanel, BorderLayout.WEST);

        JLabel threadInfo = new JLabel("Thread running... ");
        JLabel threadTimerLabel = new JLabel("00:00:00");
        JButton threadButton = new JButton("Stop");
        threadButton.addActionListener(new ActionListener() {

            @Override
            public void actionPerformed(ActionEvent e) {
                if (currentThread.isRunning()) {
                    int confirmed = JOptionPane.showConfirmDialog(null,
                            "Are you sure you want to kill the running thread?", "Kill Confirmation",
                            JOptionPane.YES_NO_OPTION);
                    if (confirmed == JOptionPane.YES_OPTION) {
                        currentThread.interrupt();
                    }
                }
            }
        });

        threadTimer = new Timer(THREAD_TIMER_DELAY, new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                long seconds = currentThread.getDuration().getSeconds();
                threadTimerLabel
                        .setText(String.format("%02d:%02d:%02d", seconds / 3600, seconds / 60 % 60, seconds % 60));
            }
        });
        threadTimer.setInitialDelay(0);

        threadPanel = new JPanel();
        threadPanel.add(threadInfo);
        threadPanel.add(threadTimerLabel);
        threadPanel.add(threadButton);
        threadPanel.setVisible(false);
        statusPanel.add(threadPanel, BorderLayout.EAST);

        return statusPanel;
    }

    public static void main(final String[] args) {

        // Try to set system look and feel.
        try {
            UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
        }
        catch (Exception e) {
        }

        MainWindow w = new MainWindow();
        w.setExtendedState(JFrame.MAXIMIZED_BOTH);
        w.setVisible(true);
    }

}