# -*- coding: utf-8 -*-
#
# Copyright 2020 Amazon.com, Inc. or its affiliates. All Rights
# Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License").
# You may not use this file except in compliance with the License.
# A copy of the License is located at
#
# http://aws.amazon.com/apache2.0/
#
# or in the "license" file accompanying this file. This file is
# distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS
# OF ANY KIND, either express or implied. See the License for the
# specific language governing permissions and limitations under the
# License.
#
from abc import abstractmethod, ABC


class AbstractWebSocketClient(ABC):
    """Abstract Class to represent a basic contract for
    websocket request execution.

    User needs to  implement ``invoke`` method to invoke the
    Web Socket Connection to send skill's
    response over web-socket connection.
    """

    @abstractmethod
    def invoke(self):
        # type: () -> None
        """Invokes the underlying web-socket client to initiate a
        connection.
        """
        pass
