from datetime import timedelta
from typing import List

from django.utils.timezone import now as timezone_now

from zerver.actions.message_send import get_active_presence_idle_user_ids
from zerver.lib.test_classes import ZulipTestCase
from zerver.models import Message, UserPresence, UserProfile
from zerver.models.recipients import (
    bulk_get_direct_message_group_user_ids,
    get_direct_message_group_user_ids,
)


class MissedMessageTest(ZulipTestCase):
    def test_presence_idle_user_ids(self) -> None:
        UserPresence.objects.all().delete()

        sender = self.example_user("cordelia")
        realm = sender.realm
        hamlet = self.example_user("hamlet")
        othello = self.example_user("othello")

        hamlet_notifications_data = self.create_user_notifications_data_object(user_id=hamlet.id)
        othello_notifications_data = self.create_user_notifications_data_object(user_id=othello.id)

        def assert_active_presence_idle_user_ids(user_ids: List[int]) -> None:
            presence_idle_user_ids = get_active_presence_idle_user_ids(
                realm=realm,
                sender_id=sender.id,
                user_notifications_data_list=[
                    hamlet_notifications_data,
                    othello_notifications_data,
                ],
            )
            self.assertEqual(sorted(user_ids), sorted(presence_idle_user_ids))

        def set_presence(user: UserProfile, client_name: str, ago: int) -> None:
            when = timezone_now() - timedelta(seconds=ago)
            UserPresence.objects.update_or_create(
                user_profile_id=user.id,
                defaults=dict(
                    realm_id=user.realm_id, last_active_time=when, last_connected_time=when
                ),
            )

        hamlet_notifications_data.dm_push_notify = True
        othello_notifications_data.dm_push_notify = True
        assert_active_presence_idle_user_ids([hamlet.id, othello.id])

        # We have already thoroughly tested the `is_notifiable` function elsewhere,
        # so we needn't test all cases here. This test exists mainly to avoid a bug
        # which existed earlier with `get_active_presence_idle_user_ids` only looking
        # at `private_message` and the `mentioned` flag, not stream level notifications.
        # Simulate Hamlet has turned on notifications for the stream, and test that he's
        # in the list.
        hamlet_notifications_data.dm_push_notify = False
        othello_notifications_data.dm_push_notify = False
        hamlet_notifications_data.stream_email_notify = True
        assert_active_presence_idle_user_ids([hamlet.id])

        # Hamlet is idle (and is supposed to receive stream notifications), so he should be in the list.
        set_presence(hamlet, "iPhone", ago=5000)
        assert_active_presence_idle_user_ids([hamlet.id])

        # If Hamlet is active, don't include him in the `presence_idle` list.
        set_presence(hamlet, "website", ago=15)
        assert_active_presence_idle_user_ids([])

        # Hamlet is active now, so only Othello should be in the list for a group
        # direct message.
        hamlet_notifications_data.stream_email_notify = False
        hamlet_notifications_data.dm_push_notify = False
        othello_notifications_data.dm_push_notify = True
        assert_active_presence_idle_user_ids([othello.id])


class TestBulkGetDirectMessageGroupUserIds(ZulipTestCase):
    def test_bulk_get_direct_message_group_user_ids(self) -> None:
        hamlet = self.example_user("hamlet")
        cordelia = self.example_user("cordelia")
        othello = self.example_user("othello")
        iago = self.example_user("iago")
        message_ids = [
            self.send_group_direct_message(hamlet, [cordelia, othello], "test"),
            self.send_group_direct_message(cordelia, [hamlet, othello, iago], "test"),
        ]

        messages = Message.objects.filter(id__in=message_ids).order_by("id")
        first_direct_message_group_recipient = messages[0].recipient
        first_direct_message_group_user_ids = set(
            get_direct_message_group_user_ids(first_direct_message_group_recipient)
        )
        second_direct_message_group_recipient = messages[1].recipient
        second_direct_message_group_user_ids = set(
            get_direct_message_group_user_ids(second_direct_message_group_recipient)
        )

        direct_message_group_user_ids = bulk_get_direct_message_group_user_ids(
            [first_direct_message_group_recipient.id, second_direct_message_group_recipient.id]
        )
        self.assertEqual(
            direct_message_group_user_ids[first_direct_message_group_recipient.id],
            first_direct_message_group_user_ids,
        )
        self.assertEqual(
            direct_message_group_user_ids[second_direct_message_group_recipient.id],
            second_direct_message_group_user_ids,
        )

    def test_bulk_get_direct_message_group_user_ids_empty_list(self) -> None:
        self.assertEqual(bulk_get_direct_message_group_user_ids([]), {})