/**
 *  Hunter-Prey simulator version 1.1
 *  Copyright 2011 Kenneth Mackin
 */
public class Field {
    Agent[] agent;
    FieldView view;

    int width = 50;
    int height = 50;
    int agents = 5;
    boolean visible = false;
    int LOOP=1000;

    int RANGE=2;

    double[][] param; 

    public static void main(String[] args){
	boolean voption = false;
	if(args.length>0){
	    if(args[0].equals("-v")){
		System.out.println("Visible mode");
		voption = true;
	    }
	}
	new Field(voption);
    }

    public Field(boolean visible){
	agent = new Agent[agents];

	agent[0] = new PreyAgent(this, width/2, height/2, 0);

	//adjustable Hunter parameters
	param = new double[][]{{0.4,-5,-4},{0.4,5,-4},{0.7,3,3},{0.7,-3,3}};

	for(int i=1; i<agents; i++){ //initialize Hunters
	    agent[i] = new HunterAgent(this, (int)(Math.random()*width), height-1, i, param[i-1][0], param[i-1][1], param[i-1][2]);
	}

	this.visible = visible;
	if(visible){
	    view = new FieldView(this);
	}

	this.start();
    }

    public void start(){
	int counter=0;
	boolean end=false;

	while(!end){
	    counter++;

	    for(int i=1; i< agent.length; i++){
		agent[i].move();
	    }

	    agent[0].move();

	    if(visible){
		view.update();
	    }

	    for(int i=1; i< agent.length; i++){
		if((Math.abs(agent[i].getX() - agent[0].getX()) <= RANGE) &&
		   (Math.abs(agent[i].getY() - agent[0].getY()) <= RANGE) ){
		    System.out.println("Capture!");
		    end=true;
		}
	    }

	    if(agent[0].getX()<0 || agent[0].getX()>=width || 
	       agent[0].getY()<0 || agent[0].getY()>=height){
		System.out.println("Escape!");
		end=true;
	    }

	    if(counter>=LOOP){
		System.out.println("Time up!");
		end=true;
	    }
	}
	
	if(visible){
	    view.showAgents();
	}

	System.out.println("counter="+counter);

    }

    public int getWidth(){
	return width;
    }

    public int getHeight(){
	return height;
    }

    public int getX(int index){
	return agent[index].getX();
    }

    public int getY(int index){
	return agent[index].getY();
    }

    public int getAgents(){
	return agents;
    }

}