import java.util.ArrayList;

public class BugSystem
{

	 ArrayList bugs;
	 ArrayList food;//an array of segments
	 
	 BugSystem()
	 {initialize();}
	 
	 void initialize()
	 {
		Organism hold;
		Segment holdS;
		Vector3D pos= new Vector3D();
		Vector3D color=new Vector3D();
		
		bugs = new ArrayList();
		food = new ArrayList();
		
		for(int i=0; i<5; i++)
		{
			//ADD BUG
			pos.setXYZ(random(3),random(3),random(3));
			hold = new Organism();
			hold.initialize(pos, .1f, .007f+random(.004f));			
			bugs.add(hold);
		}
		for(int i=0; i<15; i++)
		{
			//ADD FOOD
			pos.setXYZ(random(3),random(3),random(3));
			color.setXYZ(.1f+random(.9f),.1f+random(.9f),.1f+random(.9f));
			//Segment(Vector3D location_, float d_, Vector3D color_)
			holdS = new Segment(pos, .1f, color);	
			food.add(holdS);	
		}
		
	 }//END initialize
	 
	 void render()
	 {
		 Organism hold;
		 Segment holdS;
		 
		  for(int i=0; i< bugs.size(); i=i+1)
	      {	        
	    	hold=(Organism) bugs.get(i);
	    	hold.render();
	      }
		  for(int i=0; i< food.size(); i=i+1)
	      {
	        //render segments	        
	    	holdS=(Segment) food.get(i);
	    	holdS.render();
	      }
	 }//END render
	 
	 void simulate()
	 {
		 Vector3D pos = new Vector3D();
		 Organism hold;
		 Segment holdS;
		 int target;
		 
		 for(int i=0; i< bugs.size(); i=i+1)
	     {	        
	    	hold=(Organism) bugs.get(i);
	    	//find the closest one
	    	target=findclosest(i);
	    	holdS=(Segment)food.get(target);
	    	
	    	//check to see if next to it
	    	if(hold.distancefrom(holdS.XYZ())<=.1f+.0001f )
	    	{
	    		//Add to the Organism
	    		hold.addseg(holdS.color());
	    		//move the food
	    		pos.setXYZ(random(3),random(3),random(3));
	    		holdS.setXYZ(pos);
	    	}
	    	//or seek it
	    	else
	    	{
	    		hold.seek(holdS.XYZ());
	    	}
	     }
	 }//END simulate
	
	 
	 //findcloset
	 int findclosest(int index)
	 {
		 Organism hold;
		 Segment holdS;
		 float dist = 10000; //make this huge
		 int target=0; //set to some default
		 
		 hold = (Organism) bugs.get(index);
		 
		 for(int i=0; i<food.size(); i++)
		 {
			 holdS= (Segment) food.get(i);
			 if(hold.distancefrom(holdS.XYZ())<dist)
			 {
				dist= hold.distancefrom(holdS.XYZ());
				target=i;
			 }			 
		 }
		 return target;
		 
	 }//END findclosest
	 
	 
	 //returns -magnitude to +magnitude
	  float random(float magnitude) 
	  {
	    	return ((float)Math.random()-.5f)*2*magnitude;
	  }
}