import random

# Card values
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
}

# Function to deal a card
def deal_card():
    """Return a random card from the deck."""
    card = random.choice(list(card_values.keys()))
    return card

# Function to calculate hand total
def calculate_hand_total(hand):
    """Calculate the total value of a hand of cards, adjusting for Aces."""
    total = sum(card_values[card] for card in hand)
    ace_count = hand.count('A')

    # Adjust for aces (if total > 21, convert Aces from 11 to 1)
    while total > 21 and ace_count:
        total -= 10
        ace_count -= 1

    return total

# Function to display the hand
def display_hand(player, hand, total):
    """Display the current hand and its total."""
    print(f"{player}'s hand: {', '.join(hand)} (Total: {total})")

# Function for the player's turn
def player_turn(player_hand):
    """Handle the player's turn."""
    while True:
        display_hand("Player", player_hand, calculate_hand_total(player_hand))
        if calculate_hand_total(player_hand) > 21:
            print("You busted! Your total exceeds 21.")
            return False  # Player lost
        action = input("Do you want to 'hit' or 'stand'? ").lower()
        if action == 'hit':
            player_hand.append(deal_card())
        elif action == 'stand':
            return True  # Player stands

# Function for the dealer's turn
def dealer_turn(dealer_hand):
    """Handle the dealer's turn."""
    while calculate_hand_total(dealer_hand) < 17:
        display_hand("Dealer", dealer_hand, calculate_hand_total(dealer_hand))
        print("Dealer hits.")
        dealer_hand.append(deal_card())
    display_hand("Dealer", dealer_hand, calculate_hand_total(dealer_hand))
    return calculate_hand_total(dealer_hand) <= 21  # Dealer didn't bust

# Function to play the game
def play_game():
    """Play a full round of the game."""
    # Deal initial cards to player and dealer
    player_hand = [deal_card(), deal_card()]
    dealer_hand = [deal_card(), deal_card()]

    # Display initial hands (dealer's second card is hidden)
    print(f"Dealer's hand: {dealer_hand[0]}, ?")
    display_hand("Player", player_hand, calculate_hand_total(player_hand))

    # Player's turn
    if not player_turn(player_hand):
        return "Dealer wins!"  # Player busted

    # Dealer's turn
    dealer_total = calculate_hand_total(dealer_hand)
    if not dealer_turn(dealer_hand):
        return "Player wins!"  # Dealer busted

    # Compare totals to determine the winner
    player_total = calculate_hand_total(player_hand)
    if player_total > dealer_total:
        return "Player wins!"
    elif player_total < dealer_total:
        return "Dealer wins!"
    else:
        return "It's a draw!"

# Main loop for multiple rounds
def main():
    """Main game loop for multiple rounds."""
    print("Welcome to the Game of 21!")
    while True:
        result = play_game()
        print(result)
        play_again = input("Do you want to play again? (yes/no): ").lower()
        if play_again != 'yes':
            print("Thanks for playing! Goodbye.")
            break

# Start the game
if __name__ == "__main__":
    main()