"""Deck class: build, shuffle, draw."""

import random
from card_game.card import Card


class Deck:
    def __init__(self):
        self.cards = []
        self.draw_pile = []

    def build(self, card_id_list):
        self.cards = [Card(cid) for cid in card_id_list]
        self.draw_pile = list(self.cards)
        random.shuffle(self.draw_pile)

    def draw(self):
        if not self.draw_pile:
            return None
        return self.draw_pile.pop()

    def is_empty(self):
        return len(self.draw_pile) == 0

    def remaining(self):
        return len(self.draw_pile)