import java.awt.*;
import java.awt.event.*;
import java.net.URL;
import javax.imageio.ImageIO;

public class Mouse implements MouseListener, MouseMotionListener
{
    enum MouseState
    {
        RELEASED,
        PRESSED,
        ONCE
    }
    
    private static final int BUTTON_COUNT = 3;
    private Image cursor;
    private Component component;
    private Point center;
    private Point mousePos = null;
    private Point currentPos = null;
    private boolean[] state = null;
    private MouseState[] poll = null;

    public Mouse(Component comp)
    {
        String imgFileName = "mouse.png";
        URL url = Mouse.class.getResource(imgFileName);
        Image imgc = null;
        try
        {
            imgc=ImageIO.read(url);
        }
        catch(Exception e)
        {
        }
        
        this.cursor = imgc;
        this.component = comp;
        int w = comp.getBounds().width;
        int h = comp.getBounds().height;
        this.center = new Point(w/2, h/2);

        this.mousePos = center;
        this.currentPos = center;

        this.state = new boolean[BUTTON_COUNT];
        this.poll = new MouseState[BUTTON_COUNT];
        for(int i=0;i<BUTTON_COUNT;i++)
        {
            this.state[i] = false;
            this.poll[i] = MouseState.RELEASED;
        }
        
        disableCursor();
    }

    public Image getCursor()
    {
        return this.cursor;
    }

    public Point getPosition()
    {
        return this.mousePos;
    }

    private void disableCursor()
    {
        Toolkit tk = Toolkit.getDefaultToolkit();
        Image img = tk.createImage("");
        Point p = new Point(0, 0);
        String name = "asdf";
        Cursor cur = tk.createCustomCursor(img, p, name);
        this.component.setCursor(cur);
    }

    public synchronized void poll()
    {
        mousePos = currentPos;

        for(int i=0;i<BUTTON_COUNT;i++)
        {
            if(state[i])
            {
                if(poll[i]==MouseState.ONCE)
                    poll[i]=MouseState.PRESSED;
                else if(poll[i]==MouseState.RELEASED)
                    poll[i]=MouseState.ONCE;
            }
            else
                poll[i] = MouseState.RELEASED;
        }
    }

    public boolean isButtonDownOnce(int button)
    {
        return poll[button-1]==MouseState.ONCE;
    }

    public boolean isButtonDown(int button)
    {
        return poll[button-1]==MouseState.PRESSED||
                poll[button-1]==MouseState.ONCE;
    }
    
    public void mouseClicked(MouseEvent e)
    {
        
    }

    public void mousePressed(MouseEvent e)
    {
        state[e.getButton()-1]=true;
    }

    public void mouseReleased(MouseEvent e)
    {
        state[e.getButton()-1]=false;
    }

    public void mouseEntered(MouseEvent e)
    {
        mouseMoved(e);
    }

    public void mouseExited(MouseEvent e)
    {
        mouseMoved(e);
    }

    public void mouseDragged(MouseEvent e)
    {
        mouseMoved(e);
    }

    public void mouseMoved(MouseEvent e)
    {
        currentPos = e.getPoint();
    }
}