/**
 * Class for repeatedly simulating a roulette game and determining odds of winning.
 * 
 * @author Dave Reed
 * @version 11/04/09
 */
public class RouletteTester
{
    private static final int NUM_GAMES = 100000;       // number of games to play
    private static final int NUMBER_DEFAULT = 7;       // default for a number bet
    private static final String COLOR_DEFAULT = "red"; // default for a color bet

    /**
     * Constructor for objects of class RouletteTester
     */
    public RouletteTester()
    {
        // currently does nothing
    }

    /**
     * Simulates a single roulette game, playing until the player doubles
     * the initial bankroll or else runs out of credits.
     *   @param startAmount the player's initial bankroll (assume it's > 0)
     *   @param betAmount the amount for each successive bet (assume it's > 0)
     *   @param betType either "number" or "color"
     *   @return the final bankroll after playing the game
     */
    public int singleGame(int startAmount, int betAmount, String betType) {
            RouletteGame game = new RouletteGame();
            game.addCredits(startAmount);

            while (game.checkCredits() > 0 && game.checkCredits() < 2*startAmount) {
                int nextBet = Math.min(betAmount, game.checkCredits());
                if (betType.equals("color")) {
                    game.makeBet(nextBet, RouletteTester.COLOR_DEFAULT);
                }
                else if (betType.equals("number")) {
                    game.makeBet(nextBet, RouletteTester.NUMBER_DEFAULT);   
                }
            }       
            return game.checkCredits();
    }
    
    
 
    /**
     * Simulates repeated roulette games, playing each game until the player doubles
     * the initial bankroll or else runs out of credits.
     *   @param startAmount the player's initial bankroll (assume it's > 0)
     *   @param betAmount the amount for each successive bet (assume it's > 0)
     *   @param betType either "number" or "color"
     *   @return the percentage of wins out of RouletteTester.NUM_GAMES games
     */
    public double repeatedGames(int startAmount, int betAmount, String betType) {
        int numWins = 0;
        for (int i = 0; i < RouletteTester.NUM_GAMES; i++) {
            int finalWinnings = this.singleGame(startAmount, betAmount, betType);
            if (finalWinnings > 0) {
                numWins++;
            }
        }
        
        return 100.0*numWins / RouletteTester.NUM_GAMES;
    }
}