private static final int MIN_NUMBER = 1;

private static final int MAX_NUMBER = 100;

public static void main(String[] args) {

// Get the server address from the environment variable "SERVER_ADDRESS"

String serverAddress = System.getenv("SERVER_ADDRESS");

if (serverAddress == null || serverAddress.isEmpty()) {

serverAddress = "guess-server"; // Use the Docker Compose service name instead of localhost

}

int port = 12347;

try (Socket socket = new Socket(serverAddress, port);

BufferedReader in = new BufferedReader(new InputStreamReader(socket.getInputStream()));

PrintWriter out = new PrintWriter(socket.getOutputStream(), true);

Scanner scanner = new Scanner(System.in)) {

System.out.println("Connected to Number Guessing Game Server at " + serverAddress + ":" + port);

System.out.println("Game Rules:");

System.out.println("- Enter a number between 1 and 100");

System.out.println("- The server will transform your number based on special rules:");

System.out.println(" * Odd numbers: A random prime number less than 17 will be added");

System.out.println(" * Even numbers: The digits will be reversed");

System.out.println(" * Then: If result ≥ 100, it's divided by 2; if < 50, it's multiplied by 2");

System.out.println("- Try to guess a number that will transform to the target!");

// Read initial player assignment info from the server

String initialMessage = in.readLine();

System.out.println("\n" + initialMessage);

// Main game loop

String response;

while ((response = in.readLine()) != null) {

System.out.println(response);

if (response.contains("Enter your guess")) {

while (true) {

System.out.print("Your guess (" + MIN_NUMBER + "-" + MAX_NUMBER + "): ");

String guess = scanner.nextLine().trim();

try {

int number = Integer.parseInt(guess);

if (number >= MIN_NUMBER && number <= MAX_NUMBER) {

out.println(guess);

break;

} else {

System.out.println("Please enter a number between " + MIN_NUMBER + " and " + MAX_NUMBER);

}

} catch (NumberFormatException e) {

System.out.println("Please enter a valid number");

}

}

} else if (response.contains("Do you want to play again")) {

while (true) {

System.out.print("Play again? (y/n): ");

String answer = scanner.nextLine().trim().toLowerCase();

if (answer.equals("y") || answer.equals("n")) {

out.println(answer);

break;

} else {

System.out.println("Please enter 'y' for yes or 'n' for no");

}

}

} else if (response.contains("Goodbye!")) {

System.out.println("Thanks for playing!");

break;

}

}

} catch (ConnectException e) {

System.err.println("Could not connect to the server at " + serverAddress + ". Make sure it's running.");

} catch (IOException e) {

System.err.println("Lost connection to the server: " + e.getMessage());

}

}