using System;

using System.Collections.Generic;

using System.Linq;

​

namespace BlackjackGame

{

    public class Program

    {

        public static void Main(string[] args)

        {

            Console.WriteLine("Welcome to Blackjack!");

            Console.WriteLine("Enter number of players (2-5):");

​

            if (!int.TryParse(Console.ReadLine(), out int numPlayers) || numPlayers < 2 || numPlayers > 5)

            {

                Console.WriteLine("Invalid input. Please enter a number between 2 and 5.");

                return;

            }

​

            List<string> playerNames = new List<string>();

            for (int i = 0; i < numPlayers; i++)

            {

                Console.WriteLine($"Enter name for Player {i + 1}:");

                string playerName = Console.ReadLine();

                while (string.IsNullOrEmpty(playerName))

                {

                    Console.WriteLine("Invalid input. Please enter a valid name.");

                    playerName = Console.ReadLine();

                }

                playerNames.Add(playerName);

            }

​

            Game game = new Game(playerNames);

            game.Play();

        }

    }

​

    public class Card

    {

        public string Suit { get; set; }

        public string Rank { get; set; }

        public int Value { get; set; }

​

        public Card(string suit, string rank, int value)

        {

            Suit = suit;

            Rank = rank;

            Value = value;

        }

​

        public override string ToString()

        {

            return $"{Rank} of {Suit}";

        }

    }

​

    public class Deck

    {

        private List<Card> cards;

        private Random random;

​

        public Deck()

        {

            cards = new List<Card>();

            random = new Random();

            string[] suits = { "Clubs", "Diamonds", "Hearts", "Spades" };

            string[] ranks = { "2", "3", "4", "5", "6", "7", "8", "9", "10", "Jack", "Queen", "King", "Ace" };

            int[] values = { 2, 3, 4, 5, 6, 7, 8, 9, 10, 10, 10, 10, 11 };

​

            foreach (var suit in suits)

            {

                for (int i = 0; i < ranks.Length; i++)

                {

                    cards.Add(new Card(suit, ranks[i], values[i]));

                }

            }

        }

​

        public Card DrawCard()

        {

            int index = random.Next(cards.Count);

            Card drawnCard = cards[index];

            cards.RemoveAt(index);

            return drawnCard;

        }

​

        public void Shuffle()

        {

            for (int i = cards.Count - 1; i > 0; i--)

            {

                int j = random.Next(i + 1);

                Card temp = cards[i];

                cards[i] = cards[j];

                cards[j] = temp;

            }

        }

    }

​

    public class Player

    {

        public string Name { get; set; }

        public List<Card> Hand { get; private set; }

        public int HandValue

        {

            get

            {

                int totalValue = Hand.Sum(card => card.Value);

                int aceCount = Hand.Count(card => card.Rank == "Ace");

​

                while (totalValue > 21 && aceCount > 0)

                {

                    totalValue -= 10; // Count Ace as 1 instead of 11

                    aceCount--;

                }

​

                return totalValue;

            }

        }

​

        public Player(string name)

        {

            Name = name;

            Hand = new List<Card>();

        }

​

        public void DrawCard(Deck deck)

        {

            Hand.Add(deck.DrawCard());

        }

​

        public override string ToString()

        {

            return $"{Name}'s Hand: {string.Join(", ", Hand)} (Total Value: {HandValue})";

        }

    }

​

    public class Game

    {

        private List<Player> players;

        private Deck deck;

​

        public Game(List<string> playerNames)

        {

            players = playerNames.Select(name => new Player(name)).ToList();

            deck = new Deck();

            deck.Shuffle();

        }

​

        public void Play()

        {

            foreach (var player in players)

            {

                Console.WriteLine($"{player.Name}, it's your turn.");

                while (true)

                {

                    Console.WriteLine($"{player}");

                    Console.WriteLine("Do you want to draw a card? (y/n)");

                    string input = Console.ReadLine();

                    if (input.ToLower() == "y")

                    {

                        player.DrawCard(deck);

                        if (player.HandValue > 21)

                        {

                            Console.WriteLine($"{player.Name}, you busted!");

                            break;

                        }

                    }

                    else

                    {

                        break;

                    }

                }

            }

            DetermineWinner();

        }

​

        private void DetermineWinner()

        {

            var validPlayers = players.Where(p => p.HandValue <= 21).OrderByDescending(p => p.HandValue).ToList();

            if (validPlayers.Count > 0)

            {

                Player winner = validPlayers.First();

                if (winner != null)

                {

                    Console.WriteLine($"{winner.Name} wins with {winner.HandValue} points!");

                }

            }

            else

            {

                Console.WriteLine("No winners, all players busted!");

            }

        }

    }

}

​