# Copyright 2014-2016 OpenMarket Ltd
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.


import json
from typing import Dict
from unittest.mock import ANY, Mock, call

from twisted.internet import defer
from twisted.web.resource import Resource

from synapse.api.errors import AuthError
from synapse.federation.transport.server import TransportLayerServer
from synapse.types import UserID, create_requester

from tests import unittest
from tests.test_utils import make_awaitable
from tests.unittest import override_config

# Some local users to test with
U_APPLE = UserID.from_string("@apple:test")
U_BANANA = UserID.from_string("@banana:test")

# Remote user
U_ONION = UserID.from_string("@onion:farm")

# Test room id
ROOM_ID = "a-room"

# Room we're not in
OTHER_ROOM_ID = "another-room"


def _expect_edu_transaction(edu_type, content, origin="test"):
    return {
        "origin": origin,
        "origin_server_ts": 1000000,
        "pdus": [],
        "edus": [{"edu_type": edu_type, "content": content}],
    }


def _make_edu_transaction_json(edu_type, content):
    return json.dumps(_expect_edu_transaction(edu_type, content)).encode("utf8")


class TypingNotificationsTestCase(unittest.HomeserverTestCase):
    def make_homeserver(self, reactor, clock):
        # we mock out the keyring so as to skip the authentication check on the
        # federation API call.
        mock_keyring = Mock(spec=["verify_json_for_server"])
        mock_keyring.verify_json_for_server.return_value = defer.succeed(True)

        # we mock out the federation client too
        mock_federation_client = Mock(spec=["put_json"])
        mock_federation_client.put_json.return_value = defer.succeed((200, "OK"))

        # the tests assume that we are starting at unix time 1000
        reactor.pump((1000,))

        hs = self.setup_test_homeserver(
            notifier=Mock(),
            federation_http_client=mock_federation_client,
            keyring=mock_keyring,
            replication_streams={},
        )

        return hs

    def create_resource_dict(self) -> Dict[str, Resource]:
        d = super().create_resource_dict()
        d["/_matrix/federation"] = TransportLayerServer(self.hs)
        return d

    def prepare(self, reactor, clock, hs):
        mock_notifier = hs.get_notifier()
        self.on_new_event = mock_notifier.on_new_event

        self.handler = hs.get_typing_handler()

        self.event_source = hs.get_event_sources().sources.typing

        self.datastore = hs.get_datastore()
        self.datastore.get_destination_retry_timings = Mock(
            return_value=defer.succeed(None)
        )

        self.datastore.get_device_updates_by_remote = Mock(
            return_value=make_awaitable((0, []))
        )

        self.datastore.get_destination_last_successful_stream_ordering = Mock(
            return_value=make_awaitable(None)
        )

        def get_received_txn_response(*args):
            return defer.succeed(None)

        self.datastore.get_received_txn_response = get_received_txn_response

        self.room_members = []

        async def check_user_in_room(room_id, user_id):
            if user_id not in [u.to_string() for u in self.room_members]:
                raise AuthError(401, "User is not in the room")
            return None

        hs.get_auth().check_user_in_room = check_user_in_room

        async def check_host_in_room(room_id, server_name):
            return room_id == ROOM_ID

        hs.get_event_auth_handler().check_host_in_room = check_host_in_room

        def get_joined_hosts_for_room(room_id):
            return {member.domain for member in self.room_members}

        self.datastore.get_joined_hosts_for_room = get_joined_hosts_for_room

        async def get_users_in_room(room_id):
            return {str(u) for u in self.room_members}

        self.datastore.get_users_in_room = get_users_in_room

        self.datastore.get_user_directory_stream_pos = Mock(
            side_effect=(
                # we deliberately return a non-None stream pos to avoid doing an initial_spam
                lambda: make_awaitable(1)
            )
        )

        self.datastore.get_current_state_deltas = Mock(return_value=(0, None))

        self.datastore.get_to_device_stream_token = lambda: 0
        self.datastore.get_new_device_msgs_for_remote = (
            lambda *args, **kargs: make_awaitable(([], 0))
        )
        self.datastore.delete_device_msgs_for_remote = (
            lambda *args, **kargs: make_awaitable(None)
        )
        self.datastore.set_received_txn_response = (
            lambda *args, **kwargs: make_awaitable(None)
        )

    def test_started_typing_local(self):
        self.room_members = [U_APPLE, U_BANANA]

        self.assertEquals(self.event_source.get_current_key(), 0)

        self.get_success(
            self.handler.started_typing(
                target_user=U_APPLE,
                requester=create_requester(U_APPLE),
                room_id=ROOM_ID,
                timeout=20000,
            )
        )

        self.on_new_event.assert_has_calls([call("typing_key", 1, rooms=[ROOM_ID])])

        self.assertEquals(self.event_source.get_current_key(), 1)
        events = self.get_success(
            self.event_source.get_new_events(
                user=U_APPLE, from_key=0, limit=None, room_ids=[ROOM_ID], is_guest=False
            )
        )
        self.assertEquals(
            events[0],
            [
                {
                    "type": "m.typing",
                    "room_id": ROOM_ID,
                    "content": {"user_ids": [U_APPLE.to_string()]},
                }
            ],
        )

    @override_config({"send_federation": True})
    def test_started_typing_remote_send(self):
        self.room_members = [U_APPLE, U_ONION]

        self.get_success(
            self.handler.started_typing(
                target_user=U_APPLE,
                requester=create_requester(U_APPLE),
                room_id=ROOM_ID,
                timeout=20000,
            )
        )

        put_json = self.hs.get_federation_http_client().put_json
        put_json.assert_called_once_with(
            "farm",
            path="/_matrix/federation/v1/send/1000000",
            data=_expect_edu_transaction(
                "m.typing",
                content={
                    "room_id": ROOM_ID,
                    "user_id": U_APPLE.to_string(),
                    "typing": True,
                },
            ),
            json_data_callback=ANY,
            long_retries=True,
            backoff_on_404=True,
            try_trailing_slash_on_400=True,
        )

    def test_started_typing_remote_recv(self):
        self.room_members = [U_APPLE, U_ONION]

        self.assertEquals(self.event_source.get_current_key(), 0)

        channel = self.make_request(
            "PUT",
            "/_matrix/federation/v1/send/1000000",
            _make_edu_transaction_json(
                "m.typing",
                content={
                    "room_id": ROOM_ID,
                    "user_id": U_ONION.to_string(),
                    "typing": True,
                },
            ),
            federation_auth_origin=b"farm",
        )
        self.assertEqual(channel.code, 200)

        self.on_new_event.assert_has_calls([call("typing_key", 1, rooms=[ROOM_ID])])

        self.assertEquals(self.event_source.get_current_key(), 1)
        events = self.get_success(
            self.event_source.get_new_events(
                user=U_APPLE, from_key=0, limit=None, room_ids=[ROOM_ID], is_guest=False
            )
        )
        self.assertEquals(
            events[0],
            [
                {
                    "type": "m.typing",
                    "room_id": ROOM_ID,
                    "content": {"user_ids": [U_ONION.to_string()]},
                }
            ],
        )

    def test_started_typing_remote_recv_not_in_room(self):
        self.room_members = [U_APPLE, U_ONION]

        self.assertEquals(self.event_source.get_current_key(), 0)

        channel = self.make_request(
            "PUT",
            "/_matrix/federation/v1/send/1000000",
            _make_edu_transaction_json(
                "m.typing",
                content={
                    "room_id": OTHER_ROOM_ID,
                    "user_id": U_ONION.to_string(),
                    "typing": True,
                },
            ),
            federation_auth_origin=b"farm",
        )
        self.assertEqual(channel.code, 200)

        self.on_new_event.assert_not_called()

        self.assertEquals(self.event_source.get_current_key(), 0)
        events = self.get_success(
            self.event_source.get_new_events(
                user=U_APPLE,
                from_key=0,
                limit=None,
                room_ids=[OTHER_ROOM_ID],
                is_guest=False,
            )
        )
        self.assertEquals(events[0], [])
        self.assertEquals(events[1], 0)

    @override_config({"send_federation": True})
    def test_stopped_typing(self):
        self.room_members = [U_APPLE, U_BANANA, U_ONION]

        # Gut-wrenching
        from synapse.handlers.typing import RoomMember

        member = RoomMember(ROOM_ID, U_APPLE.to_string())
        self.handler._member_typing_until[member] = 1002000
        self.handler._room_typing[ROOM_ID] = {U_APPLE.to_string()}

        self.assertEquals(self.event_source.get_current_key(), 0)

        self.get_success(
            self.handler.stopped_typing(
                target_user=U_APPLE,
                requester=create_requester(U_APPLE),
                room_id=ROOM_ID,
            )
        )

        self.on_new_event.assert_has_calls([call("typing_key", 1, rooms=[ROOM_ID])])

        put_json = self.hs.get_federation_http_client().put_json
        put_json.assert_called_once_with(
            "farm",
            path="/_matrix/federation/v1/send/1000000",
            data=_expect_edu_transaction(
                "m.typing",
                content={
                    "room_id": ROOM_ID,
                    "user_id": U_APPLE.to_string(),
                    "typing": False,
                },
            ),
            json_data_callback=ANY,
            long_retries=True,
            backoff_on_404=True,
            try_trailing_slash_on_400=True,
        )

        self.assertEquals(self.event_source.get_current_key(), 1)
        events = self.get_success(
            self.event_source.get_new_events(
                user=U_APPLE, from_key=0, limit=None, room_ids=[ROOM_ID], is_guest=False
            )
        )
        self.assertEquals(
            events[0],
            [{"type": "m.typing", "room_id": ROOM_ID, "content": {"user_ids": []}}],
        )

    def test_typing_timeout(self):
        self.room_members = [U_APPLE, U_BANANA]

        self.assertEquals(self.event_source.get_current_key(), 0)

        self.get_success(
            self.handler.started_typing(
                target_user=U_APPLE,
                requester=create_requester(U_APPLE),
                room_id=ROOM_ID,
                timeout=10000,
            )
        )

        self.on_new_event.assert_has_calls([call("typing_key", 1, rooms=[ROOM_ID])])
        self.on_new_event.reset_mock()

        self.assertEquals(self.event_source.get_current_key(), 1)
        events = self.get_success(
            self.event_source.get_new_events(
                user=U_APPLE,
                from_key=0,
                limit=None,
                room_ids=[ROOM_ID],
                is_guest=False,
            )
        )
        self.assertEquals(
            events[0],
            [
                {
                    "type": "m.typing",
                    "room_id": ROOM_ID,
                    "content": {"user_ids": [U_APPLE.to_string()]},
                }
            ],
        )

        self.reactor.pump([16])

        self.on_new_event.assert_has_calls([call("typing_key", 2, rooms=[ROOM_ID])])

        self.assertEquals(self.event_source.get_current_key(), 2)
        events = self.get_success(
            self.event_source.get_new_events(
                user=U_APPLE,
                from_key=1,
                limit=None,
                room_ids=[ROOM_ID],
                is_guest=False,
            )
        )
        self.assertEquals(
            events[0],
            [{"type": "m.typing", "room_id": ROOM_ID, "content": {"user_ids": []}}],
        )

        # SYN-230 - see if we can still set after timeout

        self.get_success(
            self.handler.started_typing(
                target_user=U_APPLE,
                requester=create_requester(U_APPLE),
                room_id=ROOM_ID,
                timeout=10000,
            )
        )

        self.on_new_event.assert_has_calls([call("typing_key", 3, rooms=[ROOM_ID])])
        self.on_new_event.reset_mock()

        self.assertEquals(self.event_source.get_current_key(), 3)
        events = self.get_success(
            self.event_source.get_new_events(
                user=U_APPLE,
                from_key=0,
                limit=None,
                room_ids=[ROOM_ID],
                is_guest=False,
            )
        )
        self.assertEquals(
            events[0],
            [
                {
                    "type": "m.typing",
                    "room_id": ROOM_ID,
                    "content": {"user_ids": [U_APPLE.to_string()]},
                }
            ],
        )
