import java.util.Scanner;

/**
 * Simple command-line version of the Chuck-a-luck game.
 * 
 * @author Nathan Sprague
 * @version 2/17/2016
 *
 */
public class Driver {

    /**
     * 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 Chuck-a-luck!");

        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 An initialized scanner object
     * @return The int 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) {
        Dice dice;
        dice = new Dice();
        int betType;
        int number;
        String betPrompt;
        double betAmount;
        double payout;

        number = -1; // This will be ignored unless the bet is SINGLE

        betPrompt = "\nWhat is your bet?\n"
                + ChuckALuck.SINGLE + "- Single\n"
                + ChuckALuck.TRIPLE + "- Triple\n"
                + ChuckALuck.BIG + "- Big\n"
                + ChuckALuck.SMALL + "- Small\n"
                + ChuckALuck.FIELD + "- Field\n"
                + "Bet: ";

        betType = readInt(betPrompt, scan);

        if (betType == ChuckALuck.SINGLE) {
            number = readInt("Which number will you bet? (1-6) ", 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() + " " + dice.getThird());

        payout = ChuckALuck.calculatePayout(dice, betType, number, betAmount);

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

        return payout;
    }

}