###############################################################################
#
# The MIT License (MIT)
#
# Copyright (c) Tavendo GmbH
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
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# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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# THE SOFTWARE.
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import sys

from twisted.internet import reactor
from twisted.python import log
from twisted.web.server import Site
from twisted.web.static import File

from autobahn.twisted.websocket import WebSocketServerProtocol, \
    WebSocketServerFactory, \
    listenWS

from autobahn.websocket.compress import PerMessageDeflateOffer, \
    PerMessageDeflateOfferAccept


class EchoServerProtocol(WebSocketServerProtocol):

    def onConnect(self, request):
        print("WebSocket connection request by {}".format(request.peer))

    def onOpen(self):
        print("WebSocket extensions in use: {}".format(self.websocket_extensions_in_use))

    def onMessage(self, payload, isBinary):
        self.sendMessage(payload, isBinary)


if __name__ == '__main__':

    if len(sys.argv) > 1 and sys.argv[1] == 'debug':
        log.startLogging(sys.stdout)
        debug = True
    else:
        debug = False

    factory = WebSocketServerFactory("ws://localhost:9000",
                                     debug=debug,
                                     debugCodePaths=debug)

    factory.protocol = EchoServerProtocol

    # Enable WebSocket extension "permessage-deflate".
    ##

    # Function to accept offers from the client ..
    def accept(offers):
        for offer in offers:
            if isinstance(offer, PerMessageDeflateOffer):
                return PerMessageDeflateOfferAccept(offer)

    factory.setProtocolOptions(perMessageCompressionAccept=accept)

    # run server
    ##
    listenWS(factory)

    webdir = File(".")
    web = Site(webdir)
    reactor.listenTCP(8080, web)

    reactor.run()
