from . import Observable


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

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

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

    def __setitem__(self, key, value):
        super().__setitem__(key, Observable.create(value, self, key))
        Observable.notify(self, [key])

    def __delitem__(self, key):
        super().__delitem__(key)
        Observable.notify(self, [key])

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

        super().append(obs)
        Observable.notify(self, [key])

        return obs

    def __copy__(self):
        def c(e):
            if isinstance(e, (ObservableDict, ObservableList)):
                return e.copy()
            else:
                return e

        return list(map(c, self))


from . import ObservableDict