using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Collections;

namespace BlackJack
{
    class Memory
    {
        private List<Card> cards = new List<Card>();
        int cardsleft = 52;
        public void loadDeck()
        {
            System.IO.StreamReader file = new System.IO.StreamReader("Deck.txt");
            while (file.EndOfStream == false)
            {
                String[] line = file.ReadLine().Split(',');
                Card card = new Card(line[1], line[0]);
                cards.Add(card);
            }//while (file.EndOfStream == false)
            file.Close();
            for (int i = 0; i < 52; i++)
            {
                Console.WriteLine(cards[i].Face + " - " + cards[i].Suit);
            }
            Console.Read();
        }//loadDeck
        public void updateDeck(Card drawn)
        {
            cards.Remove(drawn);
            cardsleft--;
        }//updateDeck
        public bool SafeDraw(int total)
        {
            double probability = 0;
            int safe = 21 - total;
            for (int i = 1; i < cardsleft; i++)
            {
                Card c = cards[i];
                if(c.Value(c.Face) <= safe)
                {
                    probability++;
                }
            }
            if ((probability/cardsleft) > 0.5)
            {
                return true;
            }
            else
            {
                return false;
            }
        }
        public int SafeBet()
        {
            int firstTotal;
            int probability = 0;
            double numberOfpossibilties = factorial(cardsleft)/(factorial(2)*factorial(cardsleft-2));
            for (int i = 0; i < cardsleft; i++)
            {
                for (int x = 0; x < cardsleft; x++)
                {
                    if(i == x)
                        x++;
                    firstTotal = x + i;
                    if (firstTotal == 21 || firstTotal == 20 || firstTotal == 19)
                        probability++;
                }
            }
            double chance = probability / numberOfpossibilties;
            if(chance >= 0.5)
            {
                if(chance < 0.6)
                {
                    return 2;
                }
                else if(chance < 0.7)
                {
                    return 4;
                }
                else if(chance < 0.8)
                {
                    return 6;
                }
                else if (chance <0.9)
                {
                    return 8;
                }
                else if (chance < 1)
                {
                    return 10;
                }
                else
                {
                    return 1;
                }
            }
            else
            {
                return 1;
            }
        }
        static double factorial(int number)
        {
            if (number == 1)
                return 1;
            else
                return number * factorial(number - 1);
        }
    }
}