from ._deck import Deck


class NullDeck(Deck):
    def __init__(self):
        """Initializes an empty deck that can never contain cards.  Useful as a placeholder to prevent cards from being played to a space.
        """
        super().__init__([], 0)

    def __add__(self, *args, **kwargs):
        raise NotImplementedError("Cards can not be added to a NullDeck")

    def __iadd__(self, *args, **kwargs):
        raise NotImplementedError("Cards can not be added to a NullDeck")

    def append(self, *args, **kwargs):
        raise NotImplementedError("Cards can not be added to a NullDeck")

    def appendleft(self, *args, **kwargs):
        raise NotImplementedError("Cards can not be added to a NullDeck")

    def extend(self, *args, **kwargs):
        raise NotImplementedError("Cards can not be added to a NullDeck")

    def extendleft(self, *args, **kwargs):
        raise NotImplementedError("Cards can not be added to a NullDeck")