#!/usr/bin/env python

# Copyright (c) Twisted Matrix Laboratories.
# See LICENSE for details.

"""
Client which will talk to the server run by pbAnonServer.py, logging in
either anonymously or with username/password credentials.
"""

from __future__ import print_function

from sys import stdout

from twisted.python.log import err, startLogging
from twisted.cred.credentials import Anonymous, UsernamePassword
from twisted.internet import reactor
from twisted.internet.defer import gatherResults
from twisted.spread.pb import PBClientFactory


def error(why, msg):
    """
    Catch-all errback which simply logs the failure.  This isn't expected to
    be invoked in the normal case for this example.
    """
    err(why, msg)


def connected(perspective):
    """
    Login callback which invokes the remote "foo" method on the perspective
    which the server returned.
    """
    print("got perspective1 ref:", perspective)
    print("asking it to foo(13)")
    return perspective.callRemote("foo", 13)


def finished(ignored):
    """
    Callback invoked when both logins and method calls have finished to shut
    down the reactor so the example exits.
    """
    reactor.stop()


def main():
    """
    Connect to a PB server running on port 8800 on localhost and log in to
    it, both anonymously and using a username/password it will recognize.
    """
    startLogging(stdout)
    factory = PBClientFactory()
    reactor.connectTCP("localhost", 8800, factory)

    anonymousLogin = factory.login(Anonymous())
    anonymousLogin.addCallback(connected)
    anonymousLogin.addErrback(error, "Anonymous login failed")

    usernameLogin = factory.login(UsernamePassword("user1", "pass1"))
    usernameLogin.addCallback(connected)
    usernameLogin.addErrback(error, "Username/password login failed")

    bothDeferreds = gatherResults([anonymousLogin, usernameLogin])
    bothDeferreds.addCallback(finished)

    reactor.run()


if __name__ == '__main__':
    main()