#!/usr/bin/python3

# Copyright (C) 2008 AG Projects
#

"""
This test simulates a session that starts with only video, then two audio
streams are added and finally only one of the audio streams remains.
"""

from common import *


def phase1(protocol, session):
    print('setting up 1 video stream')
    caller_media = session.caller.set_media([('video', 40000, 'sendrecv', {})])
    callee_media = session.callee.set_media([('video', 30000, 'sendrecv', {})])
    media_defer = DeferredList([caller_media, callee_media])
    defer = succeed(None)
    defer.addCallback(caller_update, protocol, session, media_defer, phase2)
    return defer


def phase2(result, protocol, session):
    print('adding 2 audio streams')
    caller_media = session.caller.set_media([('video', 40000, 'sendrecv', {}), ('audio', 40010, 'sendrecv', {}), ('audio', 40020, 'sendrecv', {})])
    callee_media = session.callee.set_media([('video', 30000, 'sendrecv', {}), ('audio', 30010, 'sendrecv', {}), ('audio', 30020, 'sendrecv', {})])
    media_defer = DeferredList([caller_media, callee_media])
    defer = succeed(None)
    defer.addCallback(caller_update, protocol, session, media_defer, phase3)
    return defer


def phase3(result, protocol, session):
    print('removing 1 video and 1 audio stream')
    caller_media = session.caller.set_media([('audio', 40020, 'sendrecv', {})])
    callee_media = session.callee.set_media([('audio', 30020, 'sendrecv', {})])
    media_defer = DeferredList([caller_media, callee_media])
    defer = succeed(None)
    defer.addCallback(caller_update, protocol, session, media_defer, kthxbye)
    return defer


def caller_update(result, protocol, session, media_defer, do_after):
    print('doing update for caller')
    defer = session.do_update(protocol, 'caller', 'request', False)
    defer.addCallback(callee_update, protocol, session, media_defer, do_after)
    return defer


def callee_update(callee_addr, protocol, session, media_defer, do_after):
    print('doing update for callee')
    defer = session.do_update(protocol, 'callee', 'reply', True)
    defer.addCallback(do_media, callee_addr, protocol, session, media_defer, do_after)
    return defer


def do_media(caller_addr, callee_addr, protocol, session, media_defer, do_after):
    (caller_ip, caller_ports) = caller_addr
    (callee_ip, callee_ports) = callee_addr
    print('starting media for both parties')
    session.caller.start_media(caller_ip, caller_ports)
    session.callee.start_media(callee_ip, callee_ports)
    media_defer.addCallback(wait, protocol, session, do_after)
    return media_defer


def wait(result, protocol, session, do_after):
    print('got media, waiting 5 seconds')
    defer = Deferred()
    defer.addCallback(stop_media, protocol, session, do_after)
    reactor.callLater(5, defer.callback, None)
    return defer


def stop_media(result, protocol, session, do_after):
    print('stopping media')
    defer = DeferredList([session.caller.stop_media(), session.callee.stop_media()])
    defer.addCallback(do_after, protocol, session)
    return defer


def kthxbye(result, protocol, session):
    print('sending remove')
    return session.do_remove(protocol, 'caller')


def disconnect(result, connector):
    print('disconnecting')
    connector.disconnect()
    reactor.callLater(1, reactor.stop)


def catch_all_err(failure):
    print(failure)


if __name__ == '__main__':
    caller = Endpoint('Alice <alice@example.com>', 'Caller UA', True)
    callee = Endpoint('Bob <bob@example.com>', 'Callee UA', False)
    session = Session(caller, callee)
    connector, defer = connect_to_dispatcher()
    defer.addCallback(phase1, session)
    defer.addCallback(disconnect, connector)
    defer.addErrback(catch_all_err)
    reactor.run()