#!/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 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()