Reto #2 - Java

Retos/Reto #2 - EL PARTIDO DE TENIS [Media]/java/anmac.java

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+import java.util.Scanner;
+
+/**
+ * Escribe un programa que muestre cómo transcurre un juego de tenis y quién lo
+ * ha ganado.
+ * El programa recibirá una secuencia formada por "P1" (Player 1) o "P2" (Player
+ * 2), según quien
+ * gane cada punto del juego.
+ * 
+ * - Las puntuaciones de un juego son "Love" (cero), 15, 30, 40, "Deuce"
+ * (empate), ventaja.
+ * - Ante la secuencia [P1, P1, P2, P2, P1, P2, P1, P1], el programa mostraría
+ * lo siguiente:
+ * 15 - Love
+ * 30 - Love
+ * 30 - 15
+ * 30 - 30
+ * 40 - 30
+ * Deuce
+ * Ventaja P1
+ * Ha ganado el P1
+ * - Si quieres, puedes controlar errores en la entrada de datos.
+ * - Consulta las reglas del juego si tienes dudas sobre el sistema de puntos.
+ *
+ * @author anmac
+ */
+
+public class anmac {
+
+  enum Players {
+    P1,
+    P2;
+  }
+
+  private static final String[] SCORES = { "Love", "15", "30", "40" };
+  private static int p1_score = 0;
+  private static int p2_score = 0;
+  private static boolean finished = false;
+
+  public static void main(String[] args) {
+    String[] inputSequence = getInputSequence(args);
+    for (String player : inputSequence) {
+      if (finished) {
+        throw new IllegalArgumentException("Los puntos jugados no son correctos");
+      }
+      updateScore(player);
+      printScore(inputSequence);
+    }
+    System.exit(0); // Game over
+  }
+
+  private static String[] getInputSequence(String[] args) {
+    if (args.length > 0)
+      return String.join(" ", args).replace(",", "").split("\s+");
+
+    String input = "";
+    System.out.println("Enter a sequence like this: P1, P1, P2, P2, P1, P2, P1, P1");
+    try (Scanner sc = new Scanner(System.in)) {
+      while (true) {
+        input = sc.nextLine().trim(); // Make sure there is something else than spaces
+        if (!input.isEmpty())
+          break;
+        System.out.println("Input cannot be empty. Please try again.");
+      }
+    }
+    return input.split(",\s*");
+  }
+
+  private static void updateScore(String player) {
+    Players currentPlayer = null;
+    try {
+      currentPlayer = Players.valueOf(player);
+    } catch (IllegalArgumentException e) {
+      System.out.println(STR."Error: Invalid player input \{player}. Please enter either 'P1' or 'P2'.");
+      System.exit(1);
+    }
+
+    if (currentPlayer == Players.P1)
+      p1_score++;
+    else
+      p2_score++;
+  }
+
+  private static void printScore(String[] list) {
+    if (p1_score == p2_score) {
+      System.out.println(p1_score >= 3 ? "Deuce" : STR."\{SCORES[p1_score]} - \{SCORES[p2_score]}");
+    } else {
+      if (p1_score <= 3 && p2_score <= 3)
+        System.out.println(STR."\{SCORES[p1_score]} - \{SCORES[p2_score]}");
+      else if (Math.abs(p1_score - p2_score) <= 1)
+        System.out.println("Advantage " + ((p1_score > p2_score) ? "P1" : "P2"));
+      else {
+        System.out.println("Player " + ((p1_score > p2_score) ? "P1" : "P2") + " has won");
+        finished = true;
+      }
+    }
+  }
+}