[로또] 박진영 미션 제출합니다.

src/main/java/lotto/Application.java

@@ -1,7 +1,237 @@
 package lotto;
 
+import java.util.*;
+import java.util.stream.Collectors;
+
+enum Messages {
+    PURCHASEABLE_INPUT_MESSAGE("구입금액을 입력해 주세요."),
+    ANSWER_INPUT_MESSAGE("당첨 번호를 입력해 주세요."),
+    BONUS_INPUT_MESSAGE("보너스 번호를 입력해 주세요."),
+    ERROR_MESSAGE("[ERROR] "),
+    STATISTICS_HEADER("당첨 통계\n---");
+
+    private final String description;
+
+    Messages(String description) {
+        this.description = description;
+    }
+
+    public String getDescription() {
+        return description;
+    }
+}
+
+enum Prize {
+    FIRST(6, 2_000_000_000, "6개 일치"),
+    SECOND(5, 30_000_000, "5개 일치, 보너스 볼 일치"),
+    THIRD(5, 1_500_000, "5개 일치"),
+    FOURTH(4, 50_000, "4개 일치"),
+    FIFTH(3, 5_000, "3개 일치"),
+    NONE(0, 0, "일치하는 번호 없음");
+
+    private final int matchCount;
+    private final int prizeMoney;
+    private final String description;
+
+    Prize(int matchCount, int prizeMoney, String description) {
+        this.matchCount = matchCount;
+        this.prizeMoney = prizeMoney;
+        this.description = description;
+    }
+
+    public static Prize of(int matchCount, boolean matchBonus) {
+        if (matchCount == 6) {
+            return FIRST;
+        }
+        if (matchCount == 5 && matchBonus) {
+            return SECOND;
+        }
+        if (matchCount == 5) {
+            return THIRD;
+        }
+        if (matchCount == 4) {
+            return FOURTH;
+        }
+        if (matchCount == 3) {
+            return FIFTH;
+        }
+        return NONE;
+    }
+
+    public int getPrizeMoney() {
+        return prizeMoney;
+    }
+
+    public String getDescription() {
+        return description;
+    }
+}
+
+
+record WinningStatistics(
+        Map<Prize, Integer> prizeCount,
+        double profitRate
+) {}
 public class Application {
+    private static final int TICKET_PRICE = 1000;
+
     public static void main(String[] args) {
-        // TODO: 프로그램 구현
+        try {
+            // 예산 입력받기 & 구입개수 산출기능
+            int totalLottoCnt = getPurchaseableLottoNum(getBudgetInput());
+
+            // 로또 추천기능
+            List<List<Integer>> extractedLottoNums = extractLottoNumbers(totalLottoCnt);
+
+            // 당첨번호 입력받기
+            Lotto lotto = new Lotto(getJackpotInput());
+
+            // 보너스 번호 입력받기
+            int bonusNum = lotto.addBonusNumbers(getBonusNumber());
+
+            // 당첨 통계 출력기능
+            WinningStatistics statistics = calculateResults(extractedLottoNums, lotto.getNumbers(), bonusNum);
+            printStatistics(statistics);
+
+        } catch (IllegalArgumentException e) {
+            System.out.println(Messages.ERROR_MESSAGE.getDescription() + e.getMessage());
+        }
     }
-}
+
+    public static Integer getBudgetInput() {
+        System.out.println(Messages.PURCHASEABLE_INPUT_MESSAGE.getDescription());
+        String input = camp.nextstep.edu.missionutils.Console.readLine();
+        validateNumericInput(input);
+        return Integer.parseInt(input);
+    }
+
+    private static void validateNumericInput(String input) {
+        if (!input.matches("\\d+")) {
+            throw new IllegalArgumentException("숫자만 입력 가능합니다.");
+        }
+    }
+
+    public static List<Integer> getJackpotInput() {
+        System.out.println(Messages.ANSWER_INPUT_MESSAGE.getDescription());
+        String input = camp.nextstep.edu.missionutils.Console.readLine();
+        return parseAndValidateNumbers(input);
+    }
+
+    private static List<Integer> parseAndValidateNumbers(String input) {
+        try {
+            List<Integer> numbers = Arrays.stream(input.split(","))
+                    .map(String::trim)
+                    .map(Integer::parseInt)
+                    .collect(Collectors.toList());
+            validateLottoNumbers(numbers);
+            return numbers;
+        } catch (NumberFormatException e) {
+            throw new IllegalArgumentException("올바른 숫자 형식이 아닙니다.");
+        }
+    }
+
+    private static void validateLottoNumbers(List<Integer> numbers) {
+        if (numbers.size() != 6) {
+            throw new IllegalArgumentException("로또 번호는 6개여야 합니다.");
+        }
+        if (numbers.stream().distinct().count() != 6) {
+            throw new IllegalArgumentException("로또 번호는 중복될 수 없습니다.");
+        }
+        if (numbers.stream().anyMatch(n -> n < 1 || n > 45)) {
+            throw new IllegalArgumentException("로또 번호는 1부터 45 사이여야 합니다.");
+        }
+    }
+
+    public static Integer getBonusNumber() {
+        System.out.println(Messages.BONUS_INPUT_MESSAGE.getDescription());
+        String input = camp.nextstep.edu.missionutils.Console.readLine().trim();
+        validateNumericInput(input);
+        int number = Integer.parseInt(input);
+        if (number < 1 || number > 45) {
+            throw new IllegalArgumentException("보너스 번호는 1부터 45 사이여야 합니다.");
+        }
+        return number;
+    }
+
+    public static Integer getPurchaseableLottoNum(int budget) {
+        if (budget < TICKET_PRICE) {
+            throw new IllegalArgumentException("구입 금액은 1000원 이상이어야 합니다.");
+        }
+        int count = budget / TICKET_PRICE;
+        System.out.println(count + "개를 구매했습니다.");
+        return count;
+    }
+
+    public static List<List<Integer>> extractLottoNumbers(int totalLottoCnt) {
+        List<List<Integer>> lottos = new ArrayList<>();
+        for (int i = 0; i < totalLottoCnt; i++) {
+            List<Integer> numbers = camp.nextstep.edu.missionutils.Randoms.pickUniqueNumbersInRange(1, 45, 6);
+            System.out.println(numbers);
+            lottos.add(numbers);
+        }
+        return lottos;
+    }
+
+    private static WinningStatistics calculateResults(
+            List<List<Integer>> purchasedLottos,
+            List<Integer> winningNumbers,
+            int bonusNumber
+    ) {
+        Map<Prize, Integer> prizeCount = initializePrizeCount();
+
+        for (List<Integer> lotto : purchasedLottos) {
+            int matchCount = countMatches(lotto, winningNumbers);
+            boolean matchBonus = (matchCount == 5) && lotto.contains(bonusNumber);
+            Prize prize = Prize.of(matchCount, matchBonus);
+            prizeCount.merge(prize, 1, Integer::sum);
+        }
+
+        int totalPrize = calculateTotalPrize(prizeCount);
+        double profitRate = calculateProfitRate(purchasedLottos.size() * TICKET_PRICE, totalPrize);
+
+        return new WinningStatistics(prizeCount, profitRate);
+    }
+
+    private static int countMatches(List<Integer> lotto, List<Integer> winningNumbers) {
+        return (int) lotto.stream()
+                .filter(winningNumbers::contains)
+                .count();
+    }
+
+    private static Map<Prize, Integer> initializePrizeCount() {
+        return Arrays.stream(Prize.values())
+                .collect(Collectors.toMap(
+                        prize -> prize,
+                        prize -> 0,
+                        (prev, current) -> current,
+                        HashMap::new
+                ));
+    }
+
+    private static int calculateTotalPrize(Map<Prize, Integer> prizeCount) {
+        return prizeCount.entrySet().stream()
+                .mapToInt(entry -> entry.getKey().getPrizeMoney() * entry.getValue())
+                .sum();
+    }
+
+    private static double calculateProfitRate(int totalCost, int totalPrize) {
+        return ((double) totalPrize / totalCost) * 100;
+    }
+
+    private static void printStatistics(WinningStatistics statistics) {
+        System.out.println(Messages.STATISTICS_HEADER.getDescription());
+
+        Arrays.stream(Prize.values())
+                .filter(prize -> prize != Prize.NONE)
+                .forEach(prize -> printPrizeResult(prize, statistics.prizeCount().get(prize)));
+
+        System.out.printf("총 수익률은 %.1f%%입니다.%n", statistics.profitRate());
+    }
+
+    private static void printPrizeResult(Prize prize, int count) {
+        System.out.printf("%s (%,d원) - %d개%n",
+                prize.getDescription(),
+                prize.getPrizeMoney(),
+                count);
+    }
+}

src/main/java/lotto/Lotto.java

@@ -1,5 +1,6 @@
 package lotto;
 
+import java.util.HashSet;
 import java.util.List;
 
 public class Lotto {
@@ -11,10 +12,50 @@ public Lotto(List<Integer> numbers) {
     }
 
     private void validate(List<Integer> numbers) {
+        validateSize(numbers);
+        validateDuplicate(numbers);
+        validateRange(numbers);
+    }
+
+    public List<Integer> getNumbers() {
+        return numbers;
+    }
+
+
+    // TODO: 추가 기능 구현
+
+
+
+    private void validateSize(List<Integer> numbers) {
         if (numbers.size() != 6) {
-            throw new IllegalArgumentException("[ERROR] 로또 번호는 6개여야 합니다.");
+            throw new IllegalArgumentException("로또 번호는 6개여야 합니다.");
         }
     }
 
-    // TODO: 추가 기능 구현
+
+    private void validateDuplicate(List<Integer> numbers) {
+        if (new HashSet<>(numbers).size() != 6) {
+            throw new IllegalArgumentException("로또 번호는 중복될 수 없습니다.");
+        }
+    }
+
+    private void validateRange(List<Integer> numbers) {
+        if (numbers.stream().anyMatch(num -> num < 1 || num > 45)) {
+            throw new IllegalArgumentException("로또 번호는 1부터 45 사이여야 합니다.");
+        }
+    }
+
+    public int addBonusNumbers(int bonusNumber) {
+        validateBonusNumber(bonusNumber);
+        return bonusNumber;
+    }
+
+    private void validateBonusNumber(int bonusNumber) {
+        if (numbers.contains(bonusNumber)) {
+            throw new IllegalArgumentException("보너스 번호는 당첨 번호와 중복될 수 없습니다.");
+        }
+        if (bonusNumber < 1 || bonusNumber > 45) {
+            throw new IllegalArgumentException("보너스 번호는 1부터 45 사이여야 합니다.");
+        }
+    }
 }

src/test/java/lotto/LottoTest.java

@@ -22,4 +22,6 @@ class LottoTest {
     }
 
     // TODO: 추가 기능 구현에 따른 테스트 코드 작성
+
+
 }