from .Observable import Observable


class ObservableList(list, Observable):
    def __init__(self, lst: list, parent: Observable = None):
        list.__init__(self)
        Observable.__init__(self, parent)

        for element in lst:
            list.append(self, Observable.create(element, self))

    def __getitem__(self, value):
        return super().__getitem__(int(value))

    def __setitem__(self, key, value):
        super().__setitem__(key, Observable.create(value, self))
        Observable._notify(self)

    def __delitem__(self, key):
        super().__delitem__(key)
        Observable._notify(self)

    def append(self, value):
        obs = Observable.create(value, self)

        super().append(obs)
        Observable._notify(self)

        return obs