###############################################################################
#
# The MIT License (MIT)
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# Copyright (c) Crossbar.io Technologies GmbH
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# of this software and associated documentation files (the "Software"), to deal
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from __future__ import print_function

from os import environ
from os.path import join, split
import six

from autobahn.twisted.util import sleep
from autobahn.twisted.wamp import ApplicationSession, ApplicationRunner

from twisted.internet.defer import inlineCallbacks
from twisted.internet._sslverify import OpenSSLCertificateAuthorities
from twisted.internet.ssl import CertificateOptions
from OpenSSL import crypto


class Component(ApplicationSession):
    """
    An application component that publishes an event every second.
    """

    @inlineCallbacks
    def onJoin(self, details):
        counter = 0
        while True:
            print("publish: com.myapp.topic1", counter)
            yield self.publish(u'com.myapp.topic1', counter)
            counter += 1
            yield sleep(1)


if __name__ == '__main__':
    # load the self-signed cert the server is using
    examples_dir = join(split(__file__)[0], '..', '..', '..', '..')
    cert_fname = join(examples_dir, 'router', '.crossbar', 'server.crt')
    cert = crypto.load_certificate(
        crypto.FILETYPE_PEM,
        six.u(open(cert_fname, 'r').read())
    )
    # tell Twisted to use just the one certificate we loaded to verify connections
    options = CertificateOptions(
        trustRoot=OpenSSLCertificateAuthorities([cert]),
    )
    # ...which we pass as "ssl=" to ApplicationRunner (passed to SSL4ClientEndpoint)
    runner = ApplicationRunner(
        environ.get("AUTOBAHN_DEMO_ROUTER", u"wss://127.0.0.1:8083/ws"),
        u"crossbardemo",
        ssl=options,  # try removing this, but still use self-signed cert
    )
    runner.run(Component)
