/* BaseballGameClient.java
** Java application that is for the purpose of testing the BaseballGame 
** instance class.
** If a command line argument (which jGrasp refers to as a "run argument")
** is provided, it is taken to be the name of the file from which input is 
** to be read.  If no command line argument is provided, input is read from 
** standard input (i.e., the keyboard).
** The input data is expected to begin with an integer indicating the
** intended length of the game, in innings, and is to be followed, on
** subsequent lines, by a sequence of r's and o's, with an 'r' indicating
** the occurrence of a "run scored" event and an 'o' indicating the 
** occurrence of an "out is made" event.  An example of valid input
** (describing an incomplete 9-inning game) is
** +---------+
** |9        |
** |ooro     |
** |ooroorro |
** |oo       |
** +---------+
*/

import java.util.Scanner;
import java.io.File;
import java.io.FileNotFoundException;

public class BaseballGameClient {

   private static Scanner input;
   private static boolean echo;
   private static boolean keepGoing = true;

   public static void main(String[] args) throws FileNotFoundException {
      if (args.length > 0) {  // use args[0] as name of input file
         echo = true;
         input = new Scanner(new File(args[0]));
      }
      else {             // read from standard input (keyboard)
         echo = false;
         input = new Scanner(System.in);
      }

      int innings = getIntFromScanner("Enter duration of game in # innings:"); 
      BaseballGame game = new BaseballGame(innings);

      System.out.print("New " + game.inningsRequired() + "-inning game... ");
      System.out.println(game);

      String operations;
      do {
         System.out.print("\nEnter event code(s) (o/r/q):"); 
         operations = input.nextLine();
         if (echo) { System.out.println(operations); }
         performOperations(game, operations);
      }
      while (keepGoing  &&  operations.length() != 0  &&  !game.isOver());

      if (game.isOver()) {
         System.out.print("\n*** Game won by ");
         if (game.winningTeam() == BaseballGame.HOME)
            { System.out.print("home"); }
         else if (game.winningTeam() == BaseballGame.VISITOR)
            { System.out.print("visitor"); }
         else
            { System.out.print(" THIS SHOULD NEVER BE PRINTED!!"); }

         System.out.println(" by a score of HOME:" + 
                            game.runsScored(BaseballGame.HOME) +
                            " VISITOR:" +
                            game.runsScored(BaseballGame.VISITOR));
      }
      else {
         System.out.println("\n*** Game not over");
      }
      System.out.println("Goodbye.");
   }

   /* Performs upon the given baseball game the operations indicated
   ** by the operation codes ('o' or 'O' to record an out; 'r' or 'R' 
   ** to record a run being scored; 'q' or 'Q' to quit) in the given
   ** string.  After each operation is applied, the state of the game
   ** is displayed.
   */
   private static void performOperations(BaseballGame g, String operations) {

      final int N = operations.length();
      for (int i=0; i != N && keepGoing; i++) {
         char opCode = operations.charAt(i);
         if (opCode == 'o' || opCode == 'O') {
            System.out.print("Recording an out ... ");
            g.recordOut();
         }
         else if (opCode == 'r' || opCode == 'R') {
            System.out.print("Recording a run ...  ");
            g.recordRun();
         }
         else if (opCode == 'q' || opCode == 'Q') {
            System.out.print("Quitting ...         ");
            keepGoing = false;
         }
         else {
            System.out.print(opCode + " is not a valid operation code ... ");
         }
         System.out.println(g);
      }
   }


   /* Prints the specified string, reads an integer from the 'input' Scanner,
   ** and returns the result.
   */
   private static int getIntFromScanner(String prompt) {
      System.out.print(prompt);
      int result = Integer.parseInt(input.nextLine());
      if (echo) { System.out.println(result); }
      return result;
   }
}