import java.awt.Color;
import java.util.ArrayList;
import java.util.Random;

public class CircleFish extends Fish {
	
	private int movement = 1;

	public CircleFish(Environment env, Location loc) {
		super(env, loc);
		// TODO Auto-generated constructor stub
	}

	public CircleFish(Environment env, Location loc, Direction dir) {
		super(env, loc, dir);
		// TODO Auto-generated constructor stub
	}

	public CircleFish(Environment env, Location loc, Direction dir, Color col) {
		super(env, loc, dir, col);
		// TODO Auto-generated constructor stub
	}

	protected void move()
    {
        // Find a location to move to.
        Debug.print("Fish " + toString() + " attempting to move.  ");
        Location nextLoc = nextLocation();

        // If the next location is different, move there.
        if (movement == 1)
        {
            // Move to new location.
            Location oldLoc = location();
            changeLocation(nextLoc);

            // Update direction in case fish had to turn to move.
            changeDirection(direction().toRight()); 
        }
        else if (location() == nextLoc)
        {
        	changeDirection(direction().toRight());
        }
        else
        	changeLocation(nextLoc);
    }
	
	
	protected Location nextLocation()
    {
        Environment env = environment();
        Location oneInFront = env.getNeighbor(location(), direction());
        Location oneRight = env.getNeighbor(oneInFront, direction().toRight());
        Debug.println("  Location in circle is empty? " + 
                        env.isEmpty(oneRight));
        
        
        if (movement == 1)
        {
        	movement = 0;
        	if ( env.isEmpty(oneInFront) && env.isValid(oneInFront))
        	{
        			return oneInFront;
        
    		}
        
        	
        }
        else if (movement == 0)
        {
        	movement = 1;
        
        	if ( env.isEmpty(oneRight) && env.isValid(oneRight))
        	{
        			return oneRight;
        
    		}
        	
        
        	
        		
    		
        }

        // Only get here if there isn't a valid location to move to.
        return location();
        
    }
	
	

}