fjalvarezdd / java-tdd-katas

public class Darts {

    enum Multiplier {

        DOUBLE, TRIPLE

    }

    private int dartsLeft = 3;

    private int turn = 1;

    private int score = 301;

    private int lastTurnScore = score;

    private boolean isFinished = false;

    public int score() {

        return score;

    }

    public void dart(int i) {

    }

    public void dart(int score, Multiplier multiplier) {

        int mult = 0;

        switch (multiplier) {

            case DOUBLE:

                mult = 2;

                break;

            case TRIPLE:

                mult = 3;

                break;

        }

        int dartScore = mult*score;

        computeScore(dartScore, multiplier);

    }

    private void computeScore(int dartScore, Multiplier multiplier) {

        int newScore = score - dartScore;

        if (newScore == 0 && multiplier.equals(Multiplier.DOUBLE)) {

            isFinished = true;

            return;

        }

        if ((newScore == 1 && dartsLeft != 1) || (newScore <0)) {

            newScore = lastTurnScore;

            dartsLeft = 3;

            turn++;

        } else if (dartsLeft == 1) {

            lastTurnScore = newScore;

            dartsLeft = 3;

            turn++;

        } else {

            dartsLeft--;

        }

        score = newScore;

    }

    public int getTurn() {

        return turn;

    }

    public boolean isFinished() {

        return isFinished;

    }

}