import java.util.ArrayList;
import java.util.List;
import java.util.Random;

/**
 * This utility class simulates a one armed bandit.
 *
 * @author Franck van Breugel
 */
public class OneArmedBandit
{
    private OneArmedBandit() {}
    
    /**
     * Returns the coins from one pull.
     *
     * @param coin the coin deposited in the one armed bandit.
     * @return the payoff from one pull of the lever.
     */
    public static List<Coin> pull(Coin coin)
    {
	Random random = new Random(System.currentTimeMillis());

	final int MAX = 25;
	final int THRESHOLD = 10;

	List<Coin> result = new ArrayList<Coin>();
	int choice = random.nextInt(MAX + 1);
	if (choice < THRESHOLD)
	{
	    for (int c = 0; c < choice; c++)
	    {
		result.add(Coin.getInstance());
	    }
	}
	return result;
    }
}