try:
    from pymongo.results import BulkWriteResult  # pylint: disable=unused-import
    from pymongo.results import DeleteResult  # pylint: disable=unused-import
    from pymongo.results import InsertManyResult  # pylint: disable=unused-import
    from pymongo.results import InsertOneResult  # pylint: disable=unused-import
    from pymongo.results import UpdateResult  # pylint: disable=unused-import
except ImportError:
    class _WriteResult:

        def __init__(self, acknowledged=True):
            self.__acknowledged = acknowledged

        @property
        def acknowledged(self):
            return self.__acknowledged

    class InsertOneResult(_WriteResult):

        __slots__ = ('__inserted_id', '__acknowledged')

        def __init__(self, inserted_id, acknowledged=True):
            self.__inserted_id = inserted_id
            super().__init__(acknowledged)

        @property
        def inserted_id(self):
            return self.__inserted_id

    class InsertManyResult(_WriteResult):

        __slots__ = ('__inserted_ids', '__acknowledged')

        def __init__(self, inserted_ids, acknowledged=True):
            self.__inserted_ids = inserted_ids
            super().__init__(acknowledged)

        @property
        def inserted_ids(self):
            return self.__inserted_ids

    class UpdateResult(_WriteResult):

        __slots__ = ('__raw_result', '__acknowledged')

        def __init__(self, raw_result, acknowledged=True):
            self.__raw_result = raw_result
            super().__init__(acknowledged)

        @property
        def raw_result(self):
            return self.__raw_result

        @property
        def matched_count(self):
            if self.upserted_id is not None:
                return 0
            return self.__raw_result.get('n', 0)

        @property
        def modified_count(self):
            return self.__raw_result.get('nModified')

        @property
        def upserted_id(self):
            return self.__raw_result.get('upserted')

    class DeleteResult(_WriteResult):

        __slots__ = ('__raw_result', '__acknowledged')

        def __init__(self, raw_result, acknowledged=True):
            self.__raw_result = raw_result
            super().__init__(acknowledged)

        @property
        def raw_result(self):
            return self.__raw_result

        @property
        def deleted_count(self):
            return self.__raw_result.get('n', 0)

    class BulkWriteResult(_WriteResult):

        __slots__ = ('__bulk_api_result', '__acknowledged')

        def __init__(self, bulk_api_result, acknowledged):
            self.__bulk_api_result = bulk_api_result
            super().__init__(acknowledged)

        @property
        def bulk_api_result(self):
            return self.__bulk_api_result

        @property
        def inserted_count(self):
            return self.__bulk_api_result.get('nInserted')

        @property
        def matched_count(self):
            return self.__bulk_api_result.get('nMatched')

        @property
        def modified_count(self):
            return self.__bulk_api_result.get('nModified')

        @property
        def deleted_count(self):
            return self.__bulk_api_result.get('nRemoved')

        @property
        def upserted_count(self):
            return self.__bulk_api_result.get('nUpserted')

        @property
        def upserted_ids(self):
            if self.__bulk_api_result:
                return {
                    upsert['index']: upsert['_id'] for upsert in self.bulk_api_result['upserted']
                }