"""Certbot ACME PyLint plugin.

http://docs.pylint.org/plugins.html

"""
from astroid import MANAGER
from astroid import nodes


def register(unused_linter):
    """Register this module as PyLint plugin."""

def _transform(cls):
    # fix the "no-member" error on instances of
    # letsencrypt.acme.util.ImmutableMap subclasses (instance
    # attributes are initialized dynamically based on __slots__)

    # TODO: this is too broad and applies to any tested class...

    if cls.slots() is not None:
        for slot in cls.slots():
            cls.locals[slot.value] = [nodes.EmptyNode()]

    if cls.name == 'JSONObjectWithFields':
        # _fields is magically introduced by JSONObjectWithFieldsMeta
        cls.locals['_fields'] = [nodes.EmptyNode()]


MANAGER.register_transform(nodes.Class, _transform)