import java.util.Scanner;

/**
 * Simple command-line version of the Dice Roulette game.
 *
 * @author Alvin Chao
 * @author Chris Mayfield
 * @author Nathan Sprague
 * @version 02/09/2018
 */
public class Game {

   /**
    * The main keeps collecting bets from the user as long as he or she wants to
    * play. Total winnings are tracked and reported after each bet.
    *
    * @param args Command-line arguments. Not used.
    */
   public static void main(String[] args) {
      Scanner scan;
      String keepPlaying;
      double totalWinnings;

      keepPlaying = "y";
      totalWinnings = 0;
      scan = new Scanner(System.in);

      System.out.println("Welcome to Dice Roulette!");

      while (keepPlaying.equals("y")) {
         totalWinnings += oneBet(scan);
         System.out.printf("Your total winnings are $%,.2f\n",
               totalWinnings);
         System.out.printf("Play again? (y/n) ");
         keepPlaying = scan.nextLine();
      }

      System.out.println("Thanks for playing!");
   }

   /**
    * Prompt the user for an integer value and return the result.
    *
    * @param prompt the prompt to display
    * @param scan   initialized scanner object
    * @return value entered by the user
    */
   public static int readInt(String prompt, Scanner scan) {
      int input;
      System.out.print(prompt);
      input = scan.nextInt();
      scan.nextLine();
      return input;
   }

   /**
    * Handle one betting interaction with the user. This method will ask the
    * user what bet they want to place, and how much they want to wager.
    *
    * @param scan initialized scanner object
    * @return amount that the player won or lost on the bet
    */
   public static double oneBet(Scanner scan) {
      int betType;
      String betPrompt;
      double betAmount;
      double payout;

      Dice dice = new Dice();
      int number = -1; // This will be ignored unless the bet is SINGLE

      betPrompt = "\nWhat is your bet?(0-14)\n"
            + "0 = Under 7\n"
            + "1 = Over 7\n"
            + "Any number 2-12\n"
            + "13 = Odd\n"
            + "14 = Even\n"
            + "Bet: ";

      betType = readInt(betPrompt, scan);
      System.out.print("How much do you want to bet? ");
      betAmount = scan.nextDouble();
      scan.nextLine();

      System.out.println("You rolled: " + dice.getFirst() + " "
            + dice.getSecond() + " ");

      payout = Roulette.payout(dice, betType, betAmount);

      if (payout <= 0) {
         System.out.println("Better luck next time!");
      } else {
         System.out.printf("Congratulations! You won $%,.2f!\n", payout);
      }

      return payout;
   }
}