class Registry(object):
    def __init__(self):
        self._registry = {}
        self._field_registry = {}

    def register(self, cls):
        from .schema import SIGsObjectType

        assert issubclass(
            cls, SIGsObjectType
        ), 'Apenas SIGsObjectTypes podem ser registrados, received "{}"'.format(
            cls.__name__
        )
        self._registry[cls._meta.model] = cls

    def get_type_for_model(self, model):
        return self._registry.get(model)

    def register_converted_field(self, field, converted):
        self._field_registry[field] = converted

    def get_converted_field(self, field):
        return self._field_registry.get(field)


registry = None


def get_global_registry():
    global registry
    if not registry:
        registry = Registry()
    return registry


def reset_global_registry():
    global registry
    registry = None