import java.util.Vector;
import java.awt.*;

public class Icobj implements Runnable
{    
  public final static byte Right=0, Left=1, Up=2, Down=3;
  public int radius = 10, step = 30;
  protected String name;
  public Color color = Color.blue;
  public double x,y;
  protected Thread myThread;
  protected boolean painted = false;

  protected IcobjWorkspace workspace = null;
  protected static int rand(int n){ return (int)(Math.random()*1000)%n; }  
  
  public Icobj(String n,int x, int y){ name = n; this.x = x; this.y = y; }
  public Icobj(String n){ this(n,rand(300),rand(300)); }

  public String toString(){ return name+"("+x+","+y+")"; }
  public void setWorkspace(IcobjWorkspace w){ workspace = w; }

  public void behavior(){ painted = false; }
  // moving 
  public void translate(double dx,double dy){ x+=dx; y+=dy; }
  public void unprotMoveRight(){ x+=step; }
  public void unprotMoveLeft(){ x-=step; }
  public void unprotMoveDown(){ y+=step; }
  public void unprotMoveUp(){ y-=step; }  
  public void moveRight(){ if(x<workspace.size().width-radius-step) x+=step; }
  public void moveLeft(){  if(x>step+radius) x-=step; }
  public void moveDown(){  if(y<workspace.size().height-radius-step) y+=step; }
  public void moveUp(){    if(y>step+radius) y-=step; }

  public void moveRandom(){
     switch(rand(4)){
        case Right: moveRight(); return;
        case Left:  moveLeft(); return;  
        case Up:    moveUp(); return;
        default:    moveDown();
     }
   }
  // detect 
  protected double dist(Icobj i){
     double dx=x-i.x, dy=y-i.y;
     return Math.sqrt(dx*dx+dy*dy);
  }

  protected Icobj closest(int dim, Color color){
     double min = 100000;
     Icobj target = null;
     Vector icobjs = workspace.icobjsInInfluence(this,dim);
     for(int i=0;i<icobjs.size();i++){
        Icobj other = (Icobj)icobjs.elementAt(i);
        if (other.color!=color) continue;
        double d = dist(other);
        if (d<min){ min = d; target = other; } 
     }   
     return target;
  }
  // painting
  public void paint(Graphics g){
    g.setColor(color);
    g.fillOval((int)(x-radius),(int)(y-radius),(int)2*radius,(int)2*radius);
    g.setColor(Color.black);
    g.drawOval((int)(x-radius),(int)(y-radius),(int)2*radius,(int)2*radius);
    painted = true;
  }
  // running
  public void stop(){ 
     if (myThread != null){
        System.out.println("icobj stopped");
        myThread.stop();
     }
  }
    public void run(){ 
     while(true){ 
        behavior(); 
        while (!painted) try{ Thread.sleep(30); }catch(Exception e){}
     } 
  }
}