/**
* This method displays the in-game help menu. It includes a table of all the prizes currently in
* the machine.
*/
private void displayHelp() {
System.out.println(
"----- [Display Game Help] -----\n"
+ "The objective of the Lucky Vending Machine game is for the\n"
+ "player to guess a number that corresponds to a prize. A\n"
+ "list of all the prizes available and its cost and worth is\n"
+ "shown below.\n");
if (prizes.getSize() > 0) prizes.displayPrizes();
else System.out.println("[No prizes currently in the system.]");
System.out.println(
"\nIf the player's guess matches the number generated by the\n"
+ "machine, they win the prize.\n\n"
+ "To begin, set up a new player with [1] and then guess with\n"
+ "[2].\n\n"
+ "If you are the administrator, type [0] in the main menu to\n"
+ "access the prize configuration menu.");
}
/** Reads a password from the user and checks if it matches. */
private void checkPassword() {
Scanner console = new Scanner(System.in);
System.out.print("Administrator password: "******"Success!\n");
prizes.displayMenu();
} else System.out.println("Password is incorrect.\n");
}
/**
* This method prompts the user for a guess, checks that it is valid, and then compares it to a
* random lucky number. If both numbers match, the Player wins the Prize.
*/
private void guessPrize() {
Scanner console = new Scanner(System.in);
System.out.println(
"----- [Guess a Prize] -----\n"
+ "Please guess a number between 1 and "
+ prizes.getSize()
+ ":");
int guess = 0;
while (!validGuess(guess)) {
System.out.print("> ");
try {
guess = console.nextInt();
if (validGuess(guess)) compareLuckyNumber(guess);
else
System.out.println(
"Error! Please guess a number between 1 and " + prizes.getSize() + ":");
} catch (Exception e) {
System.out.println("Error! Invalid guess.\n");
break;
}
}
}
/**
* Compares the number given with a random lucky number. If they match, the Player object will be
* updated with details of the new Prize they have won.
*
* @param guess The number that is to be compared.
*/
private void compareLuckyNumber(int guess) {
System.out.println("You have guessed: " + guess);
int randomNumber = LuckyGuessGenerator.generateRandomNumber(prizes.getSize());
System.out.println("The lucky number is: " + randomNumber);
if (guess == randomNumber) {
players.getPlayer(currentPlayer).addPrize(prizes.getPrize(guess - 1));
System.out.println(
"Congratulations! you have won a "
+ prizes.getPrize(guess - 1).getName()
+ " worth $"
+ prizes.getPrize(guess - 1).getWorth()
+ "!\n");
players.getPlayer(currentPlayer).addWorth(prizes.getPrize(guess - 1).getWorth());
} else System.out.println("Too bad! You didn't win anything.\n");
players.getPlayer(currentPlayer).addSpent(prizes.getPrize(guess - 1).getCost());
}
/**
* This method checks that a guess is valid.
*
* @param guess The guess that needs to be validated.
* @return True if the guess is valid.
*/
private boolean validGuess(int guess) {
boolean isValid = false;
if (guess >= 1 && guess <= prizes.getSize()) isValid = true;
return isValid;
}
/** Stops the Lucky Vending Machine game. */
private void exitGame() {
System.out.println("----- [Exit Game] -----");
System.out.println("The game will now exit. Have a nice day.");
players = new PlayerList(); // Deletes all players.
prizes.writePrizes("prizes.txt"); // Writes all data from the PrizeList to a file.
}
