feat(model): 서비스 레이어 구현 #4

Author: daeGULLL

src/main/java/lotto/service/LottoService.java

@@ -0,0 +1,60 @@
+package lotto.service;
+
+import java.util.Arrays;
+import java.util.List;
+import java.util.Set;
+import java.util.stream.IntStream;
+import lotto.model.Game;
+import lotto.model.Player;
+import lotto.util.GamePrize;
+
+public class LottoService {
+    private Game game;
+    private Player player;
+    private static final int PRIZE_LENGTH = GamePrize.values().length;
+
+    public void setGame(Game game) {
+        this.game = game;
+    }
+
+    public void setPlayer(Player player) {
+        this.player = player;
+    }
+
+    public int[] calculateLottoResultType() {
+        int[] resultList = new int[PRIZE_LENGTH];
+        player.getPurchasedLottoList().forEach(lotto -> updateResultList(resultList, lotto.getNumbers()));
+        return resultList;
+    }
+
+    public float calculateLottoResultProfit(int[] resultList) {
+        int[] prizeMoneyList = Arrays.stream(GamePrize.values()).mapToInt(GamePrize::getPrizeMoney).toArray();
+        int earnedMoney = IntStream.range(0, PRIZE_LENGTH).map(i -> resultList[i] * prizeMoneyList[i]).sum();
+        player.setProfitMoney(earnedMoney);
+        return player.getProfitPercent();
+    }
+
+    void updateResultList(int[] resultList, List<Integer> singleLotto) {
+        if (checkPrizeIndex(singleLotto) > -1) {
+            resultList[checkPrizeIndex(singleLotto)]++;
+        }
+    }
+
+    int checkPrizeIndex(List<Integer> singleLotto) {
+        Set<Integer> jackpotNumbers = game.getJackpotNumbers();
+        //일치하는 로또 공 개수 셈
+        int matchingLottoBall = (int) singleLotto.stream().filter(jackpotNumbers::contains).count();
+        if (matchingLottoBall == 6) {
+            if (hasBonusMatch(singleLotto)) {
+                return GamePrize.PRIZE_2ND.getIndex();
+            }
+            return GamePrize.PRIZE_1ST.getIndex();
+        }
+        return matchingLottoBall - 3;
+    }
+
+    boolean hasBonusMatch(List<Integer> singleLotto) {
+        int bonus = game.getBonus();
+        return singleLotto.contains(bonus);
+    }
+}