Computer.java

package model.computer;

import java.util.List;

import model.game.GameNumber;
import model.game.Result;
import model.generator.NumberGenerator;

public class Computer {
	private static final int NUMBER_LENGTH = 3;
	private final GameNumber gameNumber;

	public Computer(NumberGenerator numberGenerator) {
		this.gameNumber = new GameNumber(numberGenerator.generate());
	}

	public Result calculate(List<Integer> playerNumber) {
		int strikes = countStrikes(playerNumber);
		int balls = countBalls(playerNumber) - strikes;

		return new Result(strikes, balls);
	}

	private int countStrikes(List<Integer> playerNumbers) {
		int strikes = 0;
		for (int i = 0; i < NUMBER_LENGTH; i++) {
			if (gameNumber.getNumber().get(i).equals(playerNumbers.get(i))) {
				strikes++;
			}
		}
		return strikes;
	}

	private int countBalls(List<Integer> playerNumbers) {
		int balls = 0;
		for (int num : playerNumbers) {
			if (gameNumber.getNumber().contains(num)) {
				balls++;
			}
		}
		return balls;
	}
}