import java.util.Scanner;

/* Java application having as its purpose to be used in testing the class
** TennisGameState.  The program creates an instance of that class and
** prompts the user to enter a sequence of s's and r's, where 's' 
** (respectively, 'r') indicates a point scored by the server (resp., receiver).
** For each such input, the program displays the score of the game.
** Characters other than 's' or 'r' are ignored, as are any
** characters that describe a point following the end of the game.
**
** Author: R. McCloskey
** Date: September 2026
*/

public class TennisGameStateTester {

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

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

      TennisGameState game = new TennisGameState();
      System.out.println(game);

      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(); }
            else if (ch == 'r') 
               { game.pointForReceiver(); }
            else if (ch == 'q') 
               { quit = true; }
            else {
               System.out.println("Ignoring meaningless character '" + ch + "'");
            }

            System.out.println(game);  // display status of game
         }
      }
      if (quit) {
         System.out.println("\nGame aborted");
      }

      System.out.println("\nGoodbye.");
   }

}