import java.util.Random;

public class Roulette {
    
    public static void main(String[] args) {
        double initial_money = 121;
        double stop_gambling_at = 182;
        int rounds = 10000;
        double min_bet = 1;
        
        int wins = 0;
        int loss = 0;
        String hist = "";
        
        Player player;
        RouletteWheel wheel;
        
        for(int i=0; i<rounds; i++) {
            player = new Player(min_bet, initial_money);
            wheel = new RouletteWheel(RouletteWheel.SINGLE_ZERO);
            
            while(!player.isBankrupt() && (player.getBankroll()<(stop_gambling_at))) {
                playRound(wheel,player);    
            }
            if(player.isBankrupt()) {
                loss++;
                hist+="L";
            }
            else {
                wins++;
                hist+="W";
            }
        }
        double money_in = initial_money * rounds;
        double money_out = ((initial_money*wins*2));
        double profit = money_out - money_in;
        
        double wr = ((double)wins / (double) rounds) * 100 ;
        
        System.out.println("WinLoss Ratio: [W " + wins + " / L "+loss + "] = " + wr + " % Cost: "+money_in+" Profit: "+profit + " "+hist);
        
    }    
    
    public static void playRound(RouletteWheel wheel, Player player) {
        //Show Player Status
        //System.out.println(player);
    
        //Place Bet
        RouletteBet bet = player.placeNextBet();
        //System.out.println(bet);
        
        //Spin Wheel and Get Result
        RouletteResult result = wheel.spin();
        //System.out.println(result);
                    
        //Compare Bet to Wheel and Calculate Win Lose
        wheel.finaliseBets(bet, result, player);                
    }
    
    public static class RouletteWheel {
        public static final int SINGLE_ZERO = 37;
        public static final int DOUBLE_ZERO = 38;    
        private int max_number;
            
        public RouletteWheel(int type) {
            max_number = type;
        }
        
        public RouletteResult spin() {
            int rand = getSecureRandomRoll(max_number);
            return new RouletteResult(rand);
        }
        public void finaliseBets(RouletteBet bet, RouletteResult result, Player player) {
            if( ( ( bet.getNumber() == result.getNumber() ) || ( bet.getNumber() == -1 ) ) && (bet.getColour() == result.getColour()) ) {
                player.win(bet.getAmount());
            }
            else {
                player.lose(bet.getAmount());
            }
        }    
        private int getSecureRandomRoll(int max) {
            int randInt = 0;
            Random r = new Random();
            randInt = r.nextInt(max);
            return randInt;
        }    
    }

    public static class Player {
        private double multi = 3;
        private double min_bet;
        private int num_losses;
            
        private char bet_colour;
        private double bank_roll;
        private int num_spins;
        
        public Player(double min_bet, double bank_roll) {
            this.min_bet = min_bet;
            this.bank_roll = bank_roll;
            num_losses = 0;
            bet_colour = 'B'; // Starts on Black (no particular reason)
            num_spins = 0;
        }
            
        public RouletteBet placeNextBet() {
            /*switch(this.num_losses) {
                case 0:
                case 1:
                case 2:
                case 3:
                    multi = 3;
                    break;
                case 4:
                    multi = 2.6;
                    break;
                case 5:
                    multi = 2.4;
                    break;
                default:
                    multi = 2.1;
                    break;
            }*/
            
            double amount = ( min_bet * ( Math.pow(multi, (num_losses) ) ) );
                
            if(bank_roll >= amount) {
                num_spins++;
                return new RouletteBet(bet_colour, amount);
            }
            else if(bank_roll>0) {
                num_spins++;
                return new RouletteBet(bet_colour, bank_roll);
            }
            else {
                return null;
            }
        }
        private void changeBettingColour() {
            if(bet_colour=='B') {
                bet_colour = 'R';
            }
            else if(bet_colour=='R') {
                bet_colour = 'B';
            }
        }
        public void win(double n) {
            bank_roll += n;
            changeBettingColour();
            this.num_losses = 0;
        }
        public void lose(double n) {
            bank_roll -= n;
            this.num_losses++;
        }
        public String toString() {
            return "Player: $" + bank_roll + " Colour: " + bet_colour;
        }
        public boolean isBankrupt() {
            return  this.bank_roll<= 0 ;
        }
        public double getBankroll() {
            return this.bank_roll;
        }
    }
    
    public static class RouletteResult {
        private int number;
        private char colour;
        
        public RouletteResult( int n ) {
            this.number = n;
            if(this.number == 0) {
                colour = 'G';
            }
            else if(this.number % 2 == 0) {
                colour = 'B';
            }
            else {
                colour = 'R';
            }
        }
        public char getColour() {
            return this.colour;
        }
        public int getNumber() {
            return this.number;
        }
        public String toString() {
            return this.number + " " + this.colour;
        }
    }

    public static class RouletteBet {
        private char colour = 'X';
        private int number = -1;
        private double amount = 0.0;
        
        public RouletteBet(char colour, double stake) {
            this.colour = colour;
            this.amount = stake;
        }
        public RouletteBet(int number, double stake) {
            this.number = number;
            if(this.number == 0) {
                colour = 'G';
            }
            else if(this.number % 2 == 0) {
                colour = 'B';
            }
            else {
                colour = 'R';
            }
            this.amount = stake;
        }
        
        public char getColour() {
            return this.colour;
        }
        public int getNumber() {
            return this.number;
        }
        public double getAmount() {
            return this.amount;
        }
        public String toString() {
            return this.colour + " : $"+ this.amount;
        }
    }
}