package lilWorld;

import processing.core.PApplet;
import processing.core.PVector;
import java.util.ArrayList;
import java.util.List;

public class CreatureSystem {
	
	List<Creature>allCreatures = new ArrayList<Creature>();
	Creature c;
	Creature temp;
	PApplet parent;
	int creatureNo;
	int G = 10;
	int size1;
	int size2;
	float crPlus = 0;
	
	
	CreatureSystem(PApplet p, int n, int s1, int s2)
	{
		parent= p;
		creatureNo = n;
		size1 = s1;
		size2 = s2;
	
	}
	
	
	
	
	public void pushAllCreatures()
	{
		for (int i = 0; i < allCreatures.size(); i++)
		{
			c = (Creature) allCreatures.get(i); // pick a creeper
	    	//System.out.println(c.getClass().toString());
			
			for(int j = 0; j <allCreatures.size(); j++) // step through array
			{
				if (j != i) //make sure not to compare with self
				{
					
					
					
					temp = (Creature) allCreatures.get(j); //get a creeper
				    
					
					//c.interact(temp);
					
					// FROM HERE
					int tempR = temp.getSize()/2; // get radius temp
				    float cr = c.getSize()/2; //get radius c
				    cr+= crPlus;
				    //if this creeper and temp creeper are near each other
				    if (PApplet.dist(c.loc.x, c.loc.y,temp.loc.x, temp.loc.y)+tempR <= cr)
				    {
				    	
				    	
				    	
				    	
				    	if (c.loc.x == temp.loc.x && c.loc.y == temp.loc.y)//creatures are in same spot
				    	{
				    		System.out.println("a direct hit!");
				    		PVector dir = new PVector(parent.random(-15,15),parent.random(-15,15));
				    		dir.normalize(); 
				    		float force = -1 * G;            // Repelling force is inversely proportional to distance
			    			dir.mult(force); 
				    		temp.applyForce(dir);
				    		temp.changeColor();
				    		//System.out.println(c.loc+" "+temp.loc+" should be the same");
				    		
				    	}
				    	else//creature are just near each other
				    	{
				    		
				    		    System.out.println("repelling!");
				    			//System.out.println(c.loc+" "+temp.loc+" should be different");
				    			PVector dir = PVector.sub(c.loc,temp.loc); // Calculate direction of force
				    			float d = dir.mag();                       // Distance between objects
				    			dir.normalize();                           // Normalize to between 0 and 1
				    			d = parent.constrain(d,1,100);             // Keep distance within a reasonable range
				    			float force = -1 * G / (d * d);            // Repelling force is inversely proportional to distance
				    			dir.mult(force);                           // Get force vector --> magnitude * direction
				    			temp.applyForce(dir);
				 
				    	}
					    
					    // TO HERE
				    }
				}
				
			}
		    
		}
	}
	
	public void moveAllCreatures()
	{
		for(int i = 0;i < allCreatures.size(); i++)
		{
			temp = (Creature) allCreatures.get(i);
			temp.move();
		}
			
	}
	
	
	public void showAllCreatures()
	{
		for(int i = 0;i < allCreatures.size(); i++)
		{
			temp = allCreatures.get(i);
			temp.show();
		}
			
	}
	
}