import random

card_values = {'2':2, '3': 3, '4': 4, '5': 5, '6': 6, '7': 7, '8': 8, '9': 9, '10': 10, 'J': 10, 'Q': 10, 'K': 10, 'A': 11}
deck = ['2', '3', '4', '5', '6', '7', '8', '9', '10', 'J', 'Q', 'K', 'A'] * 4
random.shuffle(deck)

def deal_card(deck):
    return deck.pop()

def calculate_total(hand):
    total = sum(card_values[card] for card in hand)


    
    if 'A' in dealer_hand and total > 21:
            total -= 10
    return total
        
#player turn

def player_turn(deck,player_hand):
    while True:
        player_choice = input ("Hit or Stand? ").lower()
        if player_choice == 'hit':
            player_hand.append(deal_card(deck))
            total = calculate_total(player_hand)
            print("your hand:", player_hand,)
            
            if 'A' in player_hand and total <= 21:
                choice = input("You have an Ace. Do you want it to be 1 or 11? ")
                while choice not in ['1', '11']:
                    choice = input("Invalid input. Please choose 1 or 11: ")
                if choice == '1':
                    total = total + 1
                if choice == '11':
                    total = total + 11
            print("total:", total)

            if total > 21:
                print("Bust! You lost.")
                return False
            if total == 21:
              print("You win")
              return False   
        elif player_choice == 'stand':
            return True
            
#dealer turn
            
def dealer_turn(deck,dealer_hand):
    while calculate_total(dealer_hand) < 17 :
        dealer_hand.append(deal_card(deck))
    return dealer_hand 
    
#running the game
while True:
    player_hand = [deal_card(deck), deal_card(deck)]
    dealer_hand = [deal_card(deck), deal_card(deck)]

    print("your hand:", player_hand, "total:", calculate_total(player_hand))
    print("Dealer's hand:", dealer_hand[0])


    if player_turn(deck,player_hand):
        dealer_hand = dealer_turn(deck, dealer_hand)
        print("dealer's hand:", dealer_hand, "Total:", calculate_total(dealer_hand))

        player_total = calculate_total(player_hand)
        dealer_total = calculate_total(dealer_hand)
        if dealer_total > 21 or player_total == dealer_total or player_total > dealer_total:
                print("you win")
        elif dealer_total > player_total:
                print("dealer wins!")
        else:
             print("it's a tie!")
    play_again = input("play again? (yes/no): ").lower()
    if play_again != 'yes':
        break
    
    if len(deck) < 10:
        deck = ['2', '3', '4', '5', '6', '7', '8', '9', '10', 'J', 'Q', 'K', 'A'] * 4
        random.shuffle(deck)
print("thanks for playing")