//An instance of this class represent a single-player 
// game of Craps played with a pair of 6-sided dice.
//
//Come-Out Roll
//    2 or 3 or 12: Player wins
//    7 or 11     : Player loses - Craps Out!
//    other       : Establishes Player's point
//Match-Point Roll
//       point    : Player wins
//       7        : Player loses - Sevens Out!
//       other    : Player takes another Match-Point roll
//
public class CrapsGame
{
   //Instance Variables
   private final SixSidedDie dieOne; //1st of 2 6-sided dice
   private final SixSidedDie dieTwo; //2nd of 2 6-sided dice
   
   private String record;  //Trace of the dice rolls
   private boolean winner; //True only when player wins
   private int point;      //Score on the Come-Out roll
   
   //Constructor
   public CrapsGame()
   {
      this.dieOne = new SixSidedDie();
      this.dieTwo = new SixSidedDie();
      
      this.record = "CRAPS";
      this.winner = false;
      
      this.play();
   }
   
   //Accessor: Returns a record of this CrapsGame
   public String getRecord()
   {
      return this.record;
   }
   
   //Accessor: returns whether the player has won this CrapsGame
   public boolean playerWins()
   {
      return this.winner;
   }
   
   //Mutator: Plays this CrapsGame to completion
   public void play()
   {
      this.comeOutRoll();
      
      switch ( this.point )
      {
         case  2  :   
         case  3  :
         case 12  : this.winner = true; break;
         
         case  7  : 
         case 11  : this.winner = false; break;
         
         default  : this.matchPointRoll();
      }
      this.record += " " + (this.winner ? "WINNER" : "LOSER");
   }
   
   //Helper: The players initial throw of the dice
   private void comeOutRoll()
   {
      this.point = this.shootDice();
      this.record += " Point: " + field2(this.point);
   }
   
   //Helper: Player throws repeatedly until one of two events occurs
   // WIN - throw matches the point, or  LOSS - throws 7
   private void matchPointRoll()
   {
      this.record += " Matching:";
      
      int score;
      do
      {
         score = this.shootDice();
         this.record += " " + field2(score);
      } while ( score != 7 && score != this.point );
   
      this.winner = (score == point);
   }
   
   //Helper: Tossing the pair of dice
   private int shootDice()
   {
      this.dieOne.toss();
      this.dieTwo.toss();
      return this.dieOne.getTopFace() + this.dieTwo.getTopFace();
   }
   
   private String field2(int number)
   {
      return (number < 10 ? " " : "") + number;
   }
}