###############################################################################
#
# The MIT License (MIT)
#
# Copyright (c) Crossbar.io Technologies 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
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# 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 above copyright notice and this permission notice shall be included in
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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# THE SOFTWARE.
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###############################################################################

from os import environ
from twisted.internet import reactor
from twisted.internet.defer import inlineCallbacks

from autobahn.twisted.wamp import Session, ApplicationRunner
from autobahn.twisted.util import sleep
from autobahn.wamp.types import SubscribeOptions


class Component(Session):
    """
    An application component calling the different backend procedures.
    """

    @inlineCallbacks
    def onJoin(self, details):
        print("session attached {}".format(details))

        def got_event(*args, **kw):
            print("got_event(): args={}, kwargs={}".format(args, kw))

        # note: we're relying on 'com.example.history' (the one with
        # event-history enabled) being last so that "pub" has the
        # right ID for wamp.subscription.get_events after the loop
        for topic in [u"com.example.no_history_here", u"com.example.history"]:
            print("subscribing to '{}'".format(topic))
            pub = yield self.subscribe(
                got_event, topic,
                options=SubscribeOptions(get_retained=True),
            )
            print("id={}".format(pub.id))

        events = yield self.call(u"wamp.subscription.get_events", pub.id)
        print("Using the WAMP Meta API:")
        print("wamp.subscription.get_events {}: {}".format(pub.id, len(events)))
        for event in events:
            print("  {event[timestamp]} {event[topic]} args={event[args]} kwargs={event[kwargs]}".format(event=event))


if __name__ == '__main__':
    runner = ApplicationRunner(
        environ.get("AUTOBAHN_DEMO_ROUTER", u"ws://127.0.0.1:8080/auth_ws"),
        u"crossbardemo",
    )
    runner.run(Component)
