'''
    DS2000
    Fall 2024
    Sample code from lecture - Deck class for a card game
'''

import random
from card import Card

NUM_VALUES = 13
SUITS = ["clubs", "diamonds", "hearts", "spades"]

class Deck:
    ''' class for a deck of cards.
        Attribute: list of Card objects
        Methods: init, shuffle, deal
    '''
    def __init__(self):
        self.cards = []
        self.make_deck()

    def make_deck(self):
        ''' create a deck of 52 cards (13 values x 4 suits)'''
        for i in range(NUM_VALUES):
            for j in range(len(SUITS)):
                c = Card(SUITS[j], i + 1)
                self.cards.append(c)

    def shuffle(self):
        ''' shuffle the cards by randomly swapping positions '''
        for i in range(len(self.cards)):
            pos = random.randint(0, len(self.cards) - 1)
            self.cards[pos], self.cards[i] = self.cards[i], self.cards[pos]

    def deal(self):
        ''' deal a card by popping off the deck and returning it '''
        if self.cards:
            return self.cards.pop()
        return None