package roulette;

import util.ConsoleReader;


/**
 * Plays a game of roulette.
 * 
 * @author Robert C. Duvall
 */
public class Game
{
    // name of the game
    private static final String DEFAULT_NAME = "Roulette";

    private Wheel myWheel;
    private Bet[] myPossibleBets = 
        {
            new Bet("Red or Black", 1),
            new Bet("Odd or Even", 1),
            new Bet("Three in a Row", 11),
        };


    /**
     * Construct the game.
     */
    public Game ()
    {
        myWheel = new Wheel();
    }


    /**
     * @return name of the game
     */
    public String getName ()
    {
        return DEFAULT_NAME;
    }


    /**
     * Play a round of this game.
     *
     * For Roulette, this means prompting the player to make a bet, 
     * spinning the roulette wheel, and then verifying that the bet
     * is won or lost.
     *
     * @param player one that wants to play a round of the game
     */
    public void play (Gambler player)
    {
        int amount = ConsoleReader.promptRange("How much do you want to bet", 
                                               0, player.getBankroll());
        int whichBet = promptForBet();
        String betChoice = placeBet(whichBet);

        System.out.print("Spinning ...");
        myWheel.spin();
        System.out.println("Dropped into " + myWheel.getColor() + " " + myWheel.getNumber());

        if (betIsMade(whichBet, betChoice))
        {
            System.out.println("*** Congratulations :) You win ***");
            amount *= myPossibleBets[whichBet].getOdds();
        }
        else
        {
            System.out.println("*** Sorry :( You lose ***");
            amount *= -1;
        }
        player.updateBankroll(amount);
    }


    /**
     * Prompt the user to make a bet from a menu of choices.
     */
    private int promptForBet ()
    {
        System.out.println("You can make one of the following types of bets:");
        for (int k = 0; k < myPossibleBets.length; k++)
        {
            System.out.println((k + 1) + ") " + myPossibleBets[k].getDescription());
        }

        return ConsoleReader.promptRange("Please make a choice",
                                         1, myPossibleBets.length) - 1;
    }


    /**
     * Place the given bet by prompting the user for the specific information
     * need to complete the given bet.
     *
     * @param whichBet specific bet chosen by the user
     */
    private String placeBet (int whichBet)
    {
        String result = "";

        if (whichBet == 0)
        {
            result = ConsoleReader.promptOneOf("Please bet", Wheel.BLACK, Wheel.RED);
        }
        else if (whichBet == 1)
        {
            result = ConsoleReader.promptOneOf("Please bet", "even", "odd");
        }
        else if (whichBet == 2)
        {
            result = "" + ConsoleReader.promptRange("Enter first of three consecutive numbers", 1, 34);
        }
        System.out.println();

        return result;
    }


    /**
     * Checks if the given bet is won or lost given the user's choice and the result
     * of spinning the wheel.
     *
     * @param whichBet specific bet chosen by the user
     * @param betChoice specific value user chose to try to win the bet 
     */
    private boolean betIsMade (int whichBet, String betChoice)
    {
        if (whichBet == 0)
        {
            return myWheel.getColor().equals(betChoice);
        }
        else if (whichBet == 1)
        {
            return (myWheel.getNumber() % 2 == 0 && betChoice.equals("even")) ||
                   (myWheel.getNumber() % 2 == 1 && betChoice.equals("odd"));
        }
        else if (whichBet == 2)
        {
            int start = Integer.parseInt(betChoice);
            return (start <= myWheel.getNumber() && myWheel.getNumber() < start + 3);
        }
        else
        {
            return false;
        }
    }
}