"""
Test everything related to contents
"""

from gabbletest import sync_stream
from servicetest import (
    make_channel_proxy, assertEquals, EventPattern)
import constants as cs
from jingletest2 import (
    JingleTest2, JingleProtocol015, JingleProtocol031, test_dialects)

from twisted.words.xish import xpath

def worker(jp, q, bus, conn, stream):

    def make_stream_request(stream_type):
        media_iface.RequestStreams(remote_handle, [stream_type])

        e = q.expect('dbus-signal', signal='NewStreamHandler')
        stream_id = e.args[1]

        stream_handler = make_channel_proxy(conn, e.args[0], 'Media.StreamHandler')

        stream_handler.NewNativeCandidate("fake", jt2.get_remote_transports_dbus())
        stream_handler.Ready(jt2.get_audio_codecs_dbus())
        stream_handler.StreamState(cs.MEDIA_STREAM_STATE_CONNECTED)
        return (stream_handler, stream_id)


    jt2 = JingleTest2(jp, conn, q, stream, 'test@localhost', 'foo@bar.com/Foo')
    jt2.prepare()

    self_handle = conn.GetSelfHandle()
    remote_handle = conn.RequestHandles(cs.HT_CONTACT, ["foo@bar.com/Foo"])[0]

    # Remote end calls us
    jt2.incoming_call()

    # FIXME: these signals are not observable by real clients, since they
    #        happen before NewChannels.
    # The caller is in members
    e = q.expect('dbus-signal', signal='MembersChanged',
             args=[u'', [remote_handle], [], [], [], 0, 0])

    # We're pending because of remote_handle
    e = q.expect('dbus-signal', signal='MembersChanged',
             args=[u'', [], [], [self_handle], [], remote_handle,
                   cs.GC_REASON_INVITED])

    media_chan = make_channel_proxy(conn, e.path, 'Channel.Interface.Group')
    signalling_iface = make_channel_proxy(conn, e.path, 'Channel.Interface.MediaSignalling')
    media_iface = make_channel_proxy(conn, e.path, 'Channel.Type.StreamedMedia')

    # S-E gets notified about new session handler, and calls Ready on it
    e = q.expect('dbus-signal', signal='NewSessionHandler')
    assert e.args[1] == 'rtp'

    session_handler = make_channel_proxy(conn, e.args[0], 'Media.SessionHandler')
    session_handler.Ready()

    media_chan.AddMembers([self_handle], 'accepted')

    # S-E gets notified about a newly-created stream
    e = q.expect('dbus-signal', signal='NewStreamHandler')
    id1 = e.args[1]

    stream_handler = make_channel_proxy(conn, e.args[0], 'Media.StreamHandler')

    # We are now in members too
    e = q.expect('dbus-signal', signal='MembersChanged',
             args=[u'', [self_handle], [], [], [], self_handle,
                   cs.GC_REASON_NONE])

    # we are now both in members
    members = media_chan.GetMembers()
    assert set(members) == set([self_handle, remote_handle]), members

    stream_handler.NewNativeCandidate("fake", jt2.get_remote_transports_dbus())
    stream_handler.Ready(jt2.get_audio_codecs_dbus())
    stream_handler.StreamState(cs.MEDIA_STREAM_STATE_CONNECTED)

    # First one is transport-info
    e = q.expect('stream-iq', predicate=jp.action_predicate('transport-info'))
    assertEquals('foo@bar.com/Foo', e.query['initiator'])

    # stream.send(gabbletest.make_result_iq(stream, e.stanza))
    stream.send(jp.xml(jp.ResultIq('test@localhost', e.stanza, [])))

    # S-E reports codec intersection, after which gabble can send acceptance
    stream_handler.SupportedCodecs(jt2.get_audio_codecs_dbus())

    # Second one is session-accept
    e = q.expect('stream-iq', predicate=jp.action_predicate('session-accept'))

    # stream.send(gabbletest.make_result_iq(stream, e.stanza))
    stream.send(jp.xml(jp.ResultIq('test@localhost', e.stanza, [])))

    # Here starts the interesting part of this test
    # Remote end tries to create a content we can't handle
    node = jp.SetIq(jt2.peer, jt2.jid, [
        jp.Jingle(jt2.sid, jt2.peer, 'content-add', [
            jp.Content('bogus', 'initiator', 'both',
                jp.Description('hologram', [
                    jp.PayloadType(name, str(rate), str(id), parameters) for
                        (name, id, rate, parameters) in jt2.audio_codecs ]),
            jp.TransportGoogleP2P()) ]) ])
    stream.send(jp.xml(node))

    # In older Jingle, this is a separate namespace, which isn't
    # recognized, but it's a valid request, so it gets ackd and rejected
    if jp.dialect == 'jingle-v0.15':
        # Gabble should acknowledge content-add
        q.expect('stream-iq', iq_type='result')

        # .. and then send content-reject for the bogus content
        e = q.expect('stream-iq', iq_type='set', predicate=lambda x:
            xpath.queryForNodes("/iq/jingle[@action='content-reject']/content[@name='bogus']",
                x.stanza))

    # In new Jingle, this is a bogus subtype of recognized namespace,
    # so Gabble returns a bad request error
    else:
        q.expect('stream-iq', iq_type='error')

    # Remote end then tries to create a content with a name it's already used
    node = jp.SetIq(jt2.peer, jt2.jid, [
        jp.Jingle(jt2.sid, jt2.peer, 'content-add', [
            jp.Content(jt2.audio_names[0], 'initiator', 'both',
                jp.Description('audio', [
                    jp.PayloadType(name, str(rate), str(id), parameters) for
                        (name, id, rate, parameters) in jt2.audio_codecs ]),
            jp.TransportGoogleP2P()) ]) ])
    stream.send(jp.xml(node))

    # Gabble should return error (content already exists)
    q.expect('stream-iq', iq_type='error')

    # We try to add a stream
    (stream_handler2, id2) = make_stream_request(cs.MEDIA_STREAM_TYPE_VIDEO)

    # Gabble should now send content-add
    e = q.expect('stream-iq', iq_type='set', predicate=lambda x:
        xpath.queryForNodes("/iq/jingle[@action='content-add']",
            x.stanza))

    c = e.query.firstChildElement()
    assert c['creator'] == 'responder', c['creator']

    stream.send(jp.xml(jp.ResultIq('test@localhost', e.stanza, [])))

    # We try to add yet another stream
    (stream_handler3, id3) = make_stream_request(cs.MEDIA_STREAM_TYPE_VIDEO)

    # Gabble should send another content-add
    e = q.expect('stream-iq', iq_type='set', predicate=lambda x:
        xpath.queryForNodes("/iq/jingle[@action='content-add']",
            x.stanza))

    d = e.query.firstChildElement()
    assertEquals('responder', d['creator'])

    stream.send(jp.xml(jp.ResultIq('test@localhost', e.stanza, [])))

    # Remote end rejects the first stream we tried to add.
    node = jp.SetIq(jt2.peer, jt2.jid, [
        jp.Jingle(jt2.sid, jt2.peer, 'content-reject', [
            jp.Content(c['name'], c['creator'], c['senders']) ]) ])
    stream.send(jp.xml(node))

    # Gabble removes the stream
    q.expect('dbus-signal', signal='StreamRemoved',
        interface=cs.CHANNEL_TYPE_STREAMED_MEDIA)

    # Remote end tries to add a content with the same name as the second one we
    # just added
    node = jp.SetIq(jt2.peer, jt2.jid, [
        jp.Jingle(jt2.sid, jt2.peer, 'content-add', [
            jp.Content(d['name'], 'initiator', 'both',
                jp.Description('audio', [
                    jp.PayloadType(name, str(rate), str(id), parameters) for
                        (name, id, rate, parameters) in jt2.audio_codecs ]),
            jp.TransportGoogleP2P()) ]) ])
    stream.send(jp.xml(node))

    # Because stream names are namespaced by creator, Gabble should be okay
    # with that.
    q.expect_many(
        EventPattern('stream-iq', iq_type='result', iq_id=node[2]['id']),
        EventPattern('dbus-signal', signal='StreamAdded'),
        )

    # Remote end thinks better of that, and removes the similarly-named stream
    # it tried to add.
    node = jp.SetIq(jt2.peer, jt2.jid, [
        jp.Jingle(jt2.sid, jt2.peer, 'content-remove', [
            jp.Content(d['name'], 'initiator', d['senders']) ]) ])
    stream.send(jp.xml(node))

    q.expect_many(
        EventPattern('stream-iq', iq_type='result', iq_id=node[2]['id']),
        EventPattern('dbus-signal', signal='StreamRemoved'),
        )

    # Remote end finally accepts. When Gabble did not namespace contents by
    # their creator, it would NAK this IQ:
    #  - Gabble (responder) created a stream called 'foo';
    #  - test suite (initiator) created a stream called 'foo', which Gabble
    #    decided would replace its own stream called 'foo';
    #  - test suite removed its 'foo';
    #  - test suite accepted Gabble's 'foo', but Gabble didn't believe a stream
    #    called 'foo' existed any more.
    node = jp.SetIq(jt2.peer, jt2.jid, [
        jp.Jingle(jt2.sid, jt2.peer, 'content-accept', [
            jp.Content(d['name'], d['creator'], d['senders'],
                jp.Description('video', [
                    jp.PayloadType(name, str(rate), str(id), parameters) for
                        (name, id, rate, parameters ) in jt2.audio_codecs ]),
            jp.TransportGoogleP2P()) ]) ])
    stream.send(jp.xml(node))

    # We get remote codecs
    e = q.expect('dbus-signal', signal='SetRemoteCodecs')

    # Now, both we and remote peer try to remove the content simultaneously:
    # Telepathy client calls RemoveStreams...
    media_iface.RemoveStreams([id3])

    # ...so Gabble sends a content-remove...
    e = q.expect('stream-iq', iq_type='set', predicate=lambda x:
        xpath.queryForNodes("/iq/jingle[@action='content-remove']",
            x.stanza))

    # ...but before it's acked the peer sends its own content-remove...
    node = jp.SetIq(jt2.peer, jt2.jid, [
        jp.Jingle(jt2.sid, jt2.peer, 'content-remove', [
            jp.Content(c['name'], c['creator'], c['senders']) ]) ])
    stream.send(jp.xml(node))

    # ...and we don't want Gabble to break when that happens.
    sync_stream(q, stream)

    # Now we want to remove the first stream
    media_iface.RemoveStreams([id1])

    # Since this is the last stream, Gabble will just terminate the session.
    e = q.expect('stream-iq', iq_type='set', predicate=lambda x:
        xpath.queryForNodes("/iq/jingle[@action='session-terminate']",
            x.stanza))

if __name__ == '__main__':
    test_dialects(worker, [JingleProtocol015, JingleProtocol031])
