package casino;

import java.util.Scanner;

/**
  * This class implements a standalone executable for a simple
  * casino.  There are two casino games:  dice, and roulette.
  * 
  * @author Rance Cleaveland
  * @version 11/1/2006
  * */

public class Casino {
	
	// An abbreviation of the long-winded System.out.print
	
	private static void print (String s){
		System.out.print (s);
	}
	
	// An abbreviation of the long-winded System.out.println
	
	private static void println (String s){
		System.out.println (s);
	}
	
	/** 
	  * A polymorphic game-playing routine.
	  * @param sc 	The Scanner object that provides input
	  * @param g	The game object to be played
	  * @return		The payoff (positive) or loss (negative)
	  */
	
	public static int play (Scanner sc, Game g){
		
		String[] betTypes = g.getValidBets();  // Allowed types of bets
		String validBets = betTypes[0];		   // Concatenated string of allowed bets
		String betType;						   // Type of bet placed by user
		
		// Build validBets string
		
		for (int i=1; i < betTypes.length; i++)
			validBets += " " + betTypes[i];
		
		// Determine the kind of bet to be placed.  Do not allow an invalid
		// bet to be placed.
		
		println ("What kind of bet would you like to place?  ");
		for (;;) {
			print ("Please enter one of " + validBets + ":  ");
			betType = sc.next();
			if (g.isValidBet(betType))
				break;
			else
				println("Invalid bet.  ");
		}
		
		// Get the bet amount.  Make sure it is positive.
		
		println ("How many dollars would you like to bet?  ");
		int amt;
		for (;;) {
			amt = sc.nextInt ();
			if (amt > 0)
				break;
			else
				print ("Please enter a positive amount:  ");
		}
		
		// Now set the bet, bet amount and play the game
		
		g.setBet(betType);
		g.setBetAmount(amt);
		return (g.play());	
	}
	
	/**
	 * This method is the main driver for the casino application.  It prints
	 * header information and invokes the play method above, based on user input
	 * about the game to play.  There are two games:  dice and roulette.
	 * 
	 * @param args  Argument strings from the OS.  These are ignored.
	 */
	
	public static void main(String[] args) {
		
		// Create games to be played
		
		Scanner sc = new Scanner (System.in);
		Dice dice = new Dice ();
		Roulette roulette = new Roulette ();
		int payoff = 0;
		String names = dice.getName() + " or " + roulette.getName();
		
		// Welcome
		
		println("Welcome to the casino!\n");
		for (;;) {
			
			// Prompt for game
			
			println("What game would you like to play, " + names + "?  ");
			String game = sc.next();
			while (!game.equals(dice.getName()) && !game.equals(roulette.getName())){
				print ("Please enter " + names + ":  ");
				game = sc.next();
			}
			
			// Play appropriate game
			
			if (game.equals(dice.getName()))
				payoff = play(sc, dice);
			else
				payoff = play(sc, roulette);
			
			// Report the payoff
			
			if (payoff == 0)
				println ("There was a push; you neither won nor lost.");
			else if (payoff < 0)
				println ("You lost $" + -payoff + ".");
			else
				println ("You won $" + payoff + ".");
				
			// Continue?
			
			print("Play another game? [yn]  ");
			String response = sc.next();
			while (!response.equals("y") && !response.equals("n")){
				println ("Please enter y or n.");
				response = sc.next();
			}
			if (response.equals("n"))
				break;
		}
		println ("Good bye.  Thanks for playing.");
	}

}