import acm.graphics.*;
import acm.program.*;
import java.awt.*;
import java.awt.event.*;
import java.util.*;

public class Hexes extends GraphicsProgram {
    public void run() {
        Random rand = new Random();
        for(int i = 0; i < 10; i++) {
            double x = rand.nextDouble() * (this.getWidth() - 100);
            double y = rand.nextDouble() * (this.getHeight() - 100);
            GNgon hex = new GNgon(3 + rand.nextInt(4), x, y, 100);
            hex.setFilled(true);
            this.add(hex);
        }
        
        this.addMouseListeners();
        
        while(true) {
            this.pause(40);
            
            for(int i = 0; i < this.getElementCount(); i++) {
                GNgon shape = (GNgon) this.getElement(i);
                shape.step(this.getWidth(), this.getHeight());
            }
        }
    }
    
    public void mouseClicked(MouseEvent e) {
        double x = e.getX();
        double y = e.getY();
        GNgon shape = (GNgon) this.getElementAt(x, y);
        this.println(shape.getSides());
    }
        
}

class GNgon extends GPolygon {
    private int sideCount;
    private double direction;
    
    public GNgon(int sides, double cx, double cy, double diam) {
        sideCount = sides;
        double theta = 2 * Math.PI / sides;
        double minx = 0;
        double miny = 0;
        for(int i = 0; i < sides; i++) {
            double angle = theta * i;
            double x = diam / 2 * Math.cos(angle);
            double y = diam / 2 * Math.sin(angle);
            if(x < minx) minx = x;
            if(y < miny) miny = y;
        }
        for(int i = 0; i < sides; i++) {
            double angle = theta * i;
            double x = -minx + diam / 2 * Math.cos(angle);
            double y = -miny + diam / 2 * Math.sin(angle);
            this.addVertex(x, y);
        }
        this.move(cx, cy);
        direction = 2 * Math.PI * Math.random();
    }
    
    public int getSides() {
        return sideCount;
    }
    
    public void step(double winWidth, double winHeight) {
        this.move(5 * Math.cos(direction), 5 * Math.sin(direction));
        if(this.getX() < 0 || this.getX() + this.getWidth() > winWidth) {
            direction = Math.PI - direction;
        }
        if(this.getY() < 0 || this.getY() + this.getHeight() > winHeight) {
            direction = -direction;
        }
    }
}