import Myro.*;

public class Ball
{

    private MyroCanvas myCanvas;
    private static final double GRAVITY = 0.98;
    private static final double ENERGYLOSS = 0.8;
    private static final int RADIUS = 10;
    private static final double DELAY = 0.05;
    private MyroCircle myCircle;
    private double xPos;
    private double yPos;
    private int maxX;
    private int maxY;
    
    public Ball(MyroCanvas gamesCanvas, int canvasX, int canvasY,
                int r, int g, int b, 
                int startXLocation, int startYLocation)
    {
        myCanvas = gamesCanvas;
        double overBounce;
        boolean notDone = true;

        xPos = startXLocation;
        yPos = startYLocation;
        maxX = canvasX;
        maxY = canvasY;
        
        myCircle = new MyroCircle(myCanvas, (int)xPos, (int)yPos, RADIUS);
        myCircle.setFillColor(new java.awt.Color(b,r,g));
        myCircle.makeFilled();

    }

    public void animate(double xVelocity, double yVelocity)
    {
        boolean notDone = true;
        double overBounce;
        
        while(notDone)
        {
            myCircle.setCenter((int)xPos, (int)yPos);
            myCircle.visible();

            //add gravity to y velocity
            yVelocity += GRAVITY;
                
            //add the velocities to x and y
            xPos += xVelocity;
            yPos += yVelocity;
                
            if (Math.abs(xVelocity) < 1)
                xVelocity = 0.0;
    
            //right side
            overBounce = xPos - maxX + RADIUS;
            if (overBounce > 0)
            {
                xPos -= 2.0*overBounce;
                xVelocity *= -1.0;
                xVelocity *= ENERGYLOSS;
                yVelocity *= ENERGYLOSS;
            }

            //Left side
            overBounce = xPos - RADIUS;
            if (overBounce < 0)
            {
                xPos -= 2.0*overBounce;
                xVelocity *= -1.0;
                xVelocity *= ENERGYLOSS;
                yVelocity *= ENERGYLOSS;
            }

            //bottom
            overBounce = yPos - maxY + RADIUS;
            if(overBounce > 0)
            {
                yPos -= 2.0*overBounce;
                yVelocity *=  -1.0;
                xVelocity *= ENERGYLOSS;
                yVelocity *= ENERGYLOSS;
                if (Math.abs(yVelocity) < 2)
                {
                    yVelocity = 0.0;
                    if (Math.abs(xVelocity) < 1)
                    {
                        notDone = false;
                    }
                }
            }
                
            //sleep
            MyroUtils.sleep(DELAY);
            myCircle.invisible();

        }
        
    }
}