import java.util.*;
public class GameRPS {
  public static final Scanner SCNR = new Scanner(System.in);
  public static final Random RAND = new Random();
  // Define Hands enumeration here
  enum Hands{ ROCK, PAPER, SCISSORS }

  public static Hands getUserHand() {
    System.out.print("Enter (R)ock, (P)aper, or (S)cissors: ");
    String hand = SCNR.next();
    while(!hand.equals("R") && !hand.equals("P") && !hand.equals("S")){
      System.out.print("Invalid input. Enter again (R)ock, (P)aper, or (S)cissors: ");
      hand = SCNR.next();
    }
    if(hand.equals("R"))
      return Hands.ROCK;
    else if(hand.equals("P"))
      return Hands.PAPER;
    else
      return Hands.SCISSORS;
    // Add your code here, must check for correct input

  }

  public static Hands randomHand() {
    int number = RAND.nextInt(3);
    switch(number){
      case 0:
        return Hands.ROCK;
      case 1:
        return Hands.PAPER;
      default:
        return Hands.SCISSORS;
    }
// Add your code here, must use a switch statement

  }
  public static boolean isMyWin(Hands me, Hands user) {
    return (me == Hands.ROCK && user == Hands.SCISSORS) || (me == Hands.PAPER && user == Hands.ROCK) ||
      (me == Hands.SCISSORS && user == Hands.PAPER);
    // Add your code here, must be a single conditional expression

  }

  public static void playRPS() {
    Hands user = getUserHand();
    Hands computer = randomHand();
    System.out.println("User draws " + user);
    System.out.println("Computer draws " + computer);
    boolean userWon = isMyWin(user, computer);
    boolean computerWon = isMyWin(computer, user);
    while(!userWon && !computerWon){
      System.out.println("It's a DRAW. Play again!\n");
      user = getUserHand();
      computer = randomHand();
      System.out.println("User draws " + user);
      System.out.println("Computer draws " + computer);
      userWon = isMyWin(user, computer);
      computerWon = isMyWin(computer, user);
    }
    if(userWon)
      System.out.println("User WON!\n");
    else
      System.out.println("Computer WON!\n");

    // Add your code here, must continue until one of the players wins

  }

  public static void main(String[] args) {
    char ans = 'Y';
    System.out.println("Start the game.");
    do{
      playRPS();
      System.out.print("Want to play again (Y or N)?: ");
      ans = SCNR.next().charAt(0);
      System.out.println();
    }while(ans == 'Y' || ans == 'y');
    // Add your code here, must repeat the game until the user chooses to stop


  }

}