import zmq


class MessageFactory():

    def getZmqPubSubStreamer(self, topic):
        '''
        Not thread-safe. Always get this inside the thread/process where you intend
        to use it. 
        '''
        return ZmqPubSubStreamer(topic)


class Streamer():
    def send_message(self, message_bytes):
        raise NotImplementedError

    def send_message_topic(self, topic, message_bytes):
        raise NotImplementedError


class ZmqPubSubStreamer(Streamer):
    '''
    Not thread-safe. Always get this inside the thread/process where you intend
    to use it. 
    '''

    def __init__(self, port):
        # Should create the socket here always, since zmq is not thread safe.
        # Hopefully whoever uses this is not stupid enough to create it then
        # pass it into a thread.
        pass

    def send_message(self, message):
        '''
        Args
        ----
        message: A message type that has the serialise() method.
        '''
        pass

    def send_message_topic(self, topic, message):
        pass


class BluetoothStreamer(Streamer):
    def __init__(self):
        pass

    def send_message(self, message_bytes):
        pass