import java.util.Random;
import java.util.stream.*;

public class Deal
{
    //instance variables
    private int prizeLoc;
    private int userGuess;
   private int view;

   private Random rand = new Random();

    //constructor
    public Deal()
    {
        setPrizeLoc();
        setUserGuess();
    }

    //modifier method for userGuess (should call random number method)
    public void setUserGuess() {
      userGuess = rand();
   }

    //modifier method for prizeLoc (should call random number method)
    public void setPrizeLoc() {
      prizeLoc = rand();
   }

    //accessor method for userGuess
    public int getUserGuess() {
      return userGuess;
   }

    //accessor method for prizeLoc
    public int getPrizeLoc() {
      return prizeLoc;
   }

    //method to generate random number between 1 & 3
    private int rand() {
      return rand.nextInt(3) + 1;
   }

    //method to reveal the door
    public int view() {
      try {
         view = IntStream.rangeClosed(1, 3)
                         .filter(n -> n != userGuess && n != prizeLoc)
                         .findAny()
                         .orElseThrow(() -> new Exception());
      } catch(Exception e) {
         System.err.println(e);
         view = -1;
      }
      return view;
   }

    //method to update user's guess
    public int updateGuess() {
      try {
         return IntStream.rangeClosed(1, 3)
                         .filter(n -> n != userGuess && n != view)
                         .findAny()
                         .orElseThrow(() -> new Exception());
      } catch(Exception e) {
         System.err.println(e);
         return -1;
      }
   }

    //toString method
    public String toString()
    {
        return "user guess: " + userGuess + " prizeLoc: " + prizeLoc;
    }
}