import cards
import random

def shuffledDeck():
    """ returns a list containing 2 combined shuffled decks """
    print "Shuffling."
    shuffled = []
    unshuffled = []

    #create the unshuffled deck
    for i in range(2):
        unshuffled += cards.deck()

    #randomly choose cards to move into the shuffled deck
    while unshuffled != []:
        card = random.randint(0, len(unshuffled)-1)
        shuffled.append(unshuffled[card])
        del unshuffled[card]
                              
    return shuffled


def dealHands(deck):
    """returns numPlayers hands"""
    #the hands will be stored in a list
    hands = [[],[]]

    #the loops place the 1st and 3rd card in the first hand, 2nd and 4th in the other
    for i in range(2):
        for player in range(2):
            (hands[player]).append(deck[0])
            del deck[0]
    return hands

    
def playRound(deck):
    """Play one round between the dealer and player"""
    hands = dealHands(deck)
    playerHand = hands[0]
    dealerHand = hands[1]
    
    print "The dealer has a " + dealerHand[0].longname() + " showing.\n" 
    playHand(playerHand,deck)

    if handValue(playerHand) > 21:
        print "You lose a point."
        return -1
    else:
        print
        playDealerHand(dealerHand,deck)

        if handValue(playerHand) == handValue(dealerHand):
            print "Push"
            return 0
        elif handValue(dealerHand) > 21 or handValue(playerHand) > handValue(dealerHand):
            print "You win a point."
            return 1
        else:
            print "You lose a point."
            return -1         


def playHand(hand,deck):
    """The player plays the hand passed to the function"""
    choice = ""
    
    while handValue(hand) <= 21 and choice != "S":
        print "Your hand: " + cards.hand_string(hand)
        
        choice = ""
        #repeat the prompt until we get appropriate input
        while choice != "H" and choice != "S":
            choice = raw_input("Would you like to (H)it or (S)tand? ").upper()
            
        if choice == "H":
            hand.append(deck[0])
            print "You drew the " + deck[0].longname() + "\n"
            del deck[0]
            if handValue(hand) > 21:
                print "BUST",
                
    print "Your hand has a value of " + str(handValue(hand))
    return



def playDealerHand(hand,deck):
    """Play hand by the dealer's rules"""
    
    print "The dealer has: " + cards.hand_string(hand)
    
    while handValue(hand) <= 16:
        hand.append(deck[0])
        print "The dealer drew the " + deck[0].longname()
        del deck[0]
        if handValue(hand) > 21:
            print "BUST",
            
    print "The dealer's hand has a value of " + str(handValue(hand))    


def handValue(hand):
    """returns the best value of a hand"""
    aceFound = False
    value = 0

    for card in hand:
        rank = card.rank()
        if rank == "A":
            aceFound = True
            value = value + 1
        else:
            #most ranks are integers
            try:
                value = value + int(rank)
            #However, except for the ace, the rest are worth ten (T,J,Q,Q)
            except:
                value = value + 10

    high = value
    if aceFound:
        high = high + 10

    if high <= 21:
        return high
    else:
        return value



print "BlackJack"
print "-------------"
playerScore = 0
deck = shuffledDeck()

cont = "Y"
while cont == "Y":
    playerScore += playRound(deck)
      
    print "\nYour score is: " + str(playerScore) + "\n"
    
    cont = ""
    #repeat prompt until there is good input
    while cont != "Y" and cont != "N":
        cont = raw_input("Do you want to play another hand, (Y)es or (N)o? ").upper()

    #shuffle if necesarry
    if len(deck) < 52:
        deck = shuffledDeck()