/*

Name: Mahendra Bhattacharya

Date: June 15, 2021

Description: Make a program that can play a game of "21".

*/

using System;

public class UnitFourToSix

{

    public static void Main()

    {

        // Declare the variable identifiers needed to store input data and variables for calculations

        int numOfCards, playerTotal, computerTotal, playerWins = 0, computerWins = 0, draws = 0;

        int playerCard1 = 0, playerCard2 = 0, playerCard3 = 0, computerCard1 = 0, computerCard2 = 0, computerCard3 = 0;

        string playAgain = " ";

        //Introduce the game and ask user to initialize the game

        Console.WriteLine("Welcome to the virtual card game of \"21\",");

        Console.WriteLine("Please enter a capital \"Y\" to continue.");

        playAgain = Console.ReadLine();

        // If a "y" instead of a capital "Y" is entered fix it for the player

        if (playAgain == "y")

        {

            playAgain = "Y";

        }

        // Loop sequence so that the game can be played as many times as desired

        while (playAgain == "Y")

        {

            // Set the number of cards for the computer to 3

            int computerCard = 3;

            // Ask the user for input on how many cards they want

            Console.WriteLine("How many cards do you want to be dealt? ");

            numOfCards = Convert.ToInt32(Console.ReadLine());

            // Make random number generator

            Random n = new System.Random();

            // Loop sequence for multiple cards as entered by the user

            while (numOfCards >= 1)

            {

                // Produce a random number and display for the player

                int cardsOfPlayer = n.Next(1,11);

                Console.Write("You: {0,6}\t", cardsOfPlayer);

                // Subtract the variable by one so that the loop only produces the number for cards wanted

                numOfCards = --numOfCards;

                // Add the cards to a variable to display sum and winner

                if (playerCard1 == 0)

                {

                    playerCard1 = cardsOfPlayer;

                }

                else if (playerCard2 == 0)

                {

                    playerCard2 = cardsOfPlayer;

                }

                else

                {

                    playerCard3 = cardsOfPlayer;

                }

            }

            // Force program to display the computer's cards on a new line

            Console.Write("\n");

            // Loop sequence for 3 number for computer

            while (computerCard >= 1)

            {

                // Produce a random number and display for the computer;

                int cardsOfComputer = n.Next(1,11);

                Console.Write("Computer: {0}\t", cardsOfComputer);

                // Subtract the variable by one so that the loop only produces the number for cards wanted

                computerCard = --computerCard;

                // Add the cards to a variable to display sum and winner

                if (computerCard1 <= 0)

                {

                    computerCard1 = cardsOfComputer;

                }

                else if (computerCard2 <= 0)

                {

                    computerCard2 = cardsOfComputer;

                }

                else

                {

                    computerCard3 = cardsOfComputer;

                }

            }

            // Calculate totals 

            playerTotal = playerCard1 + playerCard2 + playerCard3;

            computerTotal = computerCard1 + computerCard2 + computerCard3;

            // Determine who wins and display the sum of each set of cards

            if (computerTotal < playerTotal)

            {

                Console.WriteLine("\nI have {0} and you have {1} so you win. ", computerTotal, playerTotal);

                playerWins++;

            }

            else if (computerTotal > playerTotal)

            {

                Console.WriteLine("\nI have {0} and you have {1} so I win. ", computerTotal, playerTotal);

                computerWins++;

            }

            else 

            {

                Console.WriteLine("\nI have {0} and you have {1} so we draw. ", computerTotal, playerTotal);

                draws++;

            }

            // Ask the user if they want to continue to play

            Console.WriteLine("Would you like to play again (Y/N) :");

            playAgain = Console.ReadLine();

            // If a "y" instead of a capital "Y" is entered fix it for the player

            if (playAgain == "y")

            {

                playAgain = "Y";

            }

        }

        // If the user wishes to stop display results

        Console.WriteLine("Thank you for playing, here are the final results for the game. ");

        Console.WriteLine("Your wins = {0, 9}", playerWins);

        Console.WriteLine("Computer wins = {0,5}", computerWins);

        Console.WriteLine("Draws = {0, 13}", draws);

    }

}