import java.util.Scanner

public class HelloWorld
{
    public static String[] values = { "A", "1", "2", "3", "4", "5", "6", "7", "8", "9", "10", "J", "Q", "K" };
    public static String[] suits = { "H", "S", "C", "D" };

    public static void main(String []args)
    {
        Scanner scan = new Scanner(System.in);
        String[] hand = new String [7];

        String cardString;
        String userGuess;

        // populate hand string with non-repeating random cards
        for (int i = 0; i < hand.length; i++)
        {
            hand[i] = GetNewCard(hand);
            System.out.println (hand[i]);
        }

        System.out.println ("I have 7 cards... Can you guess what I have?");
        System.out.println ("(Valid guesses are formatted as value, followed by suit, eg: 3H, JC, 10S)");
        System.out.print (">");

        // Prompt the user to guess a card (only allow valid guesses)
        do{
            userGuess = scan.nextLine();
        }while (ValidUserGuess(userGuess) == false);

        // Process the user's guess, now that we know it's valid
        if (ArrayContains(hand, userGuess))
        {
            System.out.println ("Wow you're the smartest!");
        }
        else
        {
            System.out.println ("You're a loser!");
        }
    }

    // gets a new card as a string (eg: 3H, JC, 10S). Will not duplicate values in hand
    public static String GetNewCard(String[] hand)
    {
        String returnString = "";
        int randNum = 0;

        do{
            returnString = "";

            randNum = (int) Math.floor(Math.random() * values.length);
            returnString += values[randNum];

            randNum = (int) Math.floor(Math.random() * suits.length);
            returnString += suits[randNum];

        }while (ArrayContains(hand, returnString));

        return returnString;
    }

    // Looks through a string array, and returns true if it contains the value / false if it does not
    public static boolean ArrayContains (String[] array, String value)
    {
        for (int i = 0; i < array.length; i++)
        {
            if (value.equals(array[i]))
                return true;
        }

        return false;
    }

    // Validates that the user guess has a valid suit and value
    public static boolean ValidUserGuess (String guess)
    {
        String valueGuess = guess.substring (0, guess.length() - 1);
        String suitGuess = guess.substring (guess.length() - 1); // tries to get just the suit

        if (ArrayContains(values, valueGuess) == false)
            return false;

        if (ArrayContains(suits, suitGuess) == false)
            return false;

        return true;
    }
}