###############################################################################
#
# The MIT License (MIT)
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# Copyright (c) Tavendo GmbH
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# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
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from twisted.internet import reactor
from twisted.internet.defer import inlineCallbacks

from autobahn.wamp.types import CallOptions
from autobahn.twisted.wamp import ApplicationSession


class Component(ApplicationSession):

    """
    An application component calling the different backend procedures.
    """

    @inlineCallbacks
    def onJoin(self, details):
        print("session attached")

        def on_event(val):
            print("Someone requested to square non-positive: {}".format(val))

        yield self.subscribe(on_event, 'com.myapp.square_on_nonpositive')

        for val in [2, 0, -2]:
            res = yield self.call('com.myapp.square', val, options=CallOptions(discloseMe=True))
            print("Squared {} = {}".format(val, res))

        self.leave()

    def onDisconnect(self):
        print("disconnected")
        reactor.stop()


if __name__ == '__main__':
    from autobahn.twisted.wamp import ApplicationRunner
    runner = ApplicationRunner("ws://127.0.0.1:8080/ws", "realm1")
    runner.run(Component)
