import random 
from carddataclass import Card

class DeckOfCards:
    """
    A deck of playing cards.
    """
    NUMBER_OF_CARDS = 52  # constant number of Cards

    def __init__(self):
        """
        Constructor of a Deck object.
        """
        self._deck = []
        self.reset()

        for count in range(DeckOfCards.NUMBER_OF_CARDS): 
            card = Card(Card.FACES[count%13], Card.SUITS[count//13])
            self._deck.append(card)

    def reset(self):
        self._current_card = 0

    def shuffle(self):
        """
        Shuffle deck.
        """
        self.reset()
        random.shuffle(self._deck)    
        self.reset()

    def deal_card(self):
        """
        @return one Card.
        """
        try:
            card = self._deck[self._current_card]
            self._current_card += 1
            return card
        except:
            return None  

    def __str__(self):
        """
        @return a string representation of the current _deck.
        """
        s = ''

        for index, card in enumerate(self._deck):
            s += f'{self._deck[index]:<19}'
            if (index + 1) % 4 == 0:
                s += '\n'
        
        return s
        
##########################################################################
# (C) Copyright 2019 by Deitel & Associates, Inc. and                    #
# Pearson Education, Inc. All Rights Reserved.                           #
#                                                                        #
# DISCLAIMER: The authors and publisher of this book have used their     #
# best efforts in preparing the book. These efforts include the          #
# development, research, and testing of the theories and programs        #
# to determine their effectiveness. The authors and publisher make       #
# no warranty of any kind, expressed or implied, with regard to these    #
# programs or to the documentation contained in these books. The authors #
# and publisher shall not be liable in any event for incidental or       #
# consequential damages in connection with, or arising out of, the       #
# furnishing, performance, or use of these programs.                     #
##########################################################################