import java.util.Scanner;

/* Java application having as its purpose to be used in testing the class
** TennisGameState2.  The user is asked to enter names for the server and
** receiver in a game of tennis, and then to enter s's and r's to identify
** which player ('s' for server, 'r' for receiver) scored each point in
** the game.  Entering 'q' results in the program terminating.
** Characters other than 's', 'r', and 'q' are ignored, as are any
** characters that describe a point following the end of the game.
**
** Author: R. McCloskey
** Date: September 2026
*/

public class TennisGameState2Tester {

   private static Scanner keyboard = new Scanner(System.in);

   public static void main(String[] args) {
      System.out.println("Welcome to the TennisGameState2Tester program.\n");

      String serverName = getString("Enter name of server: ");
      String receiverName = getString("Enter name of receiver: ");
      System.out.println();

      TennisGameState game = new TennisGameState2(serverName, receiverName);
      System.out.println(game.toString());

      boolean quit = false;
      while (!game.isOver() && !quit) {
         System.out.print("\nEnter s or r (or a sequence thereof): ");
         String response = keyboard.nextLine();

         for (int i=0; i != response.length() && !game.isOver() && !quit; i=i+1) {
            char ch = response.charAt(i);
            if (ch == 's') { 
               game.pointForServer(); 
               System.out.println(game.toString());  // display status of game
            }
            else if (ch == 'r') { 
               game.pointForReceiver();
               System.out.println(game.toString());  // display status of game
            }
            else if (ch == 'q') { 
               quit = true;
            }
            else {
               System.out.println("Ignoring meaningless character '" + ch + "'");
            }
         }
      }
      if (quit) {
         System.out.println("\nGame aborted.");
      }
      System.out.println("\nGoodbye.");
   }


   /* Displays the specified message (prompt) and returns the response
   ** entered by the user at the keyboard.
   */
   private static String getString(String prompt)
   {
      System.out.print(prompt);
      return keyboard.nextLine();
   }
}