package coloronmouse;
import java.awt.AWTException;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Component;
import java.awt.GridLayout;
import java.awt.MouseInfo;
import java.awt.Point;
import java.awt.Robot;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseEvent;
import java.awt.event.MouseMotionListener;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.HashSet;
import java.util.Set;
import javax.swing.JButton;
import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.SwingUtilities;
import javax.swing.Timer;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
import javax.swing.filechooser.FileNameExtensionFilter;

/**
 * This class checks the position every #DELAY milliseconds and
 * informs all registered MouseMotionListeners about position updates.
 */
public class NewClass {
    /* the resolution of the mouse motion */
    private static final int DELAY = 100;
    private static JTextField red,blue,green,mousex,mousey,desc;
    private static JButton save;
    private static String filechosen;


    private Component component;
    private Timer timer;
    private Set<MouseMotionListener> mouseMotionListeners;

    protected NewClass(Component component) {
        if (component == null) {
            throw new IllegalArgumentException("Null component not allowed.");
        }

        this.component = component;

        /* poll mouse coordinates at the given rate */
        timer = new Timer(DELAY, new ActionListener() {
                private Point lastPoint = MouseInfo.getPointerInfo().getLocation();

                /* called every DELAY milliseconds to fetch the
                 * current mouse coordinates */
                public synchronized void actionPerformed(ActionEvent e) {
                    Point point = MouseInfo.getPointerInfo().getLocation();

                    if (!point.equals(lastPoint)) {
                        fireMouseMotionEvent(point);
                    }

                    lastPoint = point;
                }
            });
        mouseMotionListeners = new HashSet<MouseMotionListener>();
    }

    public Component getComponent() {
        return component;
    }

    public void start() {
        timer.start();
    }

    public static void lookAndFeel()
    {
        try {
            UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
        } catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
        }
    }

    public void stop() {
        timer.stop();
    }

    public void addMouseMotionListener(MouseMotionListener listener) {
        synchronized (mouseMotionListeners) {
            mouseMotionListeners.add(listener);
        }
    }

    public void removeMouseMotionListener(MouseMotionListener listener) {
        synchronized (mouseMotionListeners) {
            mouseMotionListeners.remove(listener);
        }
    }

    protected void fireMouseMotionEvent(Point point) {
        synchronized (mouseMotionListeners) {
            for (final MouseMotionListener listener : mouseMotionListeners) {
                final MouseEvent event =
                    new MouseEvent(component, MouseEvent.MOUSE_MOVED, System.currentTimeMillis(),
                                   0, point.x, point.y, 0, false);

                SwingUtilities.invokeLater(new Runnable() {
                        public void run() {
                            listener.mouseMoved(event);
                        }
                    });
            }

        }
    }

    public static File openFile(){
        File file = null;
        JFileChooser fileChooser = new JFileChooser();
         fileChooser.setDialogTitle("Select a .txt file to save to");
         FileNameExtensionFilter filter = new FileNameExtensionFilter(
        ".txt", "txt");
        fileChooser.setFileFilter(filter);
         int returnValue = fileChooser.showOpenDialog(null);
        if(returnValue == JFileChooser.APPROVE_OPTION) {
            file = fileChooser.getSelectedFile();
            filechosen = fileChooser.getSelectedFile().getAbsolutePath();
        }
        return file;
     }

    public static void saveOutput()
    {
        try(PrintWriter out = new PrintWriter(new BufferedWriter(new FileWriter(filechosen, true)))) {
            out.println(desc.getText());
            out.println("X: "+mousex.getText()+" Y: "+mousey.getText()+" Red: "
                    +red.getText()+" Green: "+green.getText()+
                     " Blue"+blue.getText()+"\n");
        }catch (IOException e) {
        }
    }
    /**
     * adds east panel
     * @return
     */
    public static JPanel addEast()
    {
        JPanel p = new JPanel();
        p.setLayout(new GridLayout(3,1));
        JPanel p1 = new JPanel();
        save = new JButton("save");
        p1.add(save);


        class ExitListener implements ActionListener
        {
            public void actionPerformed(ActionEvent e)
            {
               saveOutput();
            }
        }
        save.addActionListener(new ExitListener());
        desc = new JTextField(10);
        JPanel p2 = new JPanel();
        JPanel space = new JPanel();
        p2.add(desc);
        p.add(space);
        p.add(p2);
        p.add(p1);


        return p;
    }

        /**
         * adds the fields
         * @return
         */
        public static JPanel addFields()
        {
        JPanel p = new JPanel();
        p.setLayout(new GridLayout(4,1));

        JPanel p1 = new JPanel();
        JLabel l1 = new JLabel("red");
        red = new JTextField(3);
        p1.add(l1);
        p1.add(red);
        p.add(p1);

        JPanel p2 = new JPanel();
        JLabel l2 = new JLabel("green");
        green = new JTextField(3);
        p2.add(l2);
        p2.add(green);
        p.add(p2);

        JPanel p3 = new JPanel();
        JLabel l3 = new JLabel("blue");
        blue = new JTextField(3);
        p3.add(l3);
        p3.add(blue);
        p.add(p3);

        JPanel p4 = new JPanel();
        p4.setLayout(new GridLayout(2,1));
        JPanel p5 = new JPanel();
        JPanel p6 = new JPanel();
        JLabel l4 = new JLabel("mouse location");
        mousex = new JTextField(4);
        mousey = new JTextField(4);
        p5.add(l4);
        p6.add(mousex);
        p6.add(mousey);
        p4.add(p5);
        p4.add(p6);
        p.add(p4);

        return p;
        }


    /* Testing the ovserver */
    public static void main(String[] args) throws AWTException {
        NewClass.lookAndFeel();
        JFrame main = new JFrame("Color Finder");
        main.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        main.setSize(275,300);
        main.setVisible(true);
        main.setLayout(new BorderLayout());
        main.add(addFields(),BorderLayout.WEST);
        main.add(addEast(),BorderLayout.EAST);
        main.getRootPane().setDefaultButton(save);
        NewClass.openFile();
        main.setVisible(true);
        Robot robot = new Robot();

        NewClass mo = new NewClass(main);
        mo.addMouseMotionListener(new MouseMotionListener() {
                public void mouseMoved(MouseEvent e) {
                    mousex.setText(new Integer(e.getX()).toString());
                    mousey.setText(new Integer(e.getY()).toString());
                    Color c = robot.getPixelColor(new Integer(e.getX()),
                            new Integer(e.getY()));
                    red.setText(new Integer(c.getRed()).toString());
                    blue.setText(new Integer(c.getBlue()).toString());
                    green.setText(new Integer(c.getGreen()).toString());

                }

                public void mouseDragged(MouseEvent e) {
                    System.out.println("mouse dragged: " + e.getPoint());
                }
            });

        mo.start();
    }
}