# Copyright (C) 2018 Avatao.com Innovative Learning Kft.
# All Rights Reserved. See LICENSE file for details.

from tornado.web import Application

from tfw.networking import EventHandlerConnector
from tfw.config.logs import logging

from .zmq_websocket_proxy import ZMQWebSocketProxy

LOG = logging.getLogger(__name__)


class TFWServer:
    """
    This class handles the proxying of messages between the frontend and event handers.
    It proxies messages from the "/ws" route to all event handlers subscribed to a ZMQ
    SUB socket.
    """
    def __init__(self):
        self._event_handler_connector = EventHandlerConnector()
        self.application = Application([(
            r'/ws', ZMQWebSocketProxy, {
                'event_handler_connector': self._event_handler_connector,
            }
        )])

    def listen(self, port):
        self.application.listen(port)