"""Tests for the DLNA DMR data module."""
from __future__ import annotations

from collections.abc import Iterable
from unittest.mock import ANY, Mock, patch

from async_upnp_client.aiohttp import AiohttpNotifyServer
from async_upnp_client.event_handler import UpnpEventHandler
import pytest

from homeassistant.components.dlna_dmr.const import DOMAIN
from homeassistant.components.dlna_dmr.data import EventListenAddr, get_domain_data
from homeassistant.const import EVENT_HOMEASSISTANT_STOP
from homeassistant.core import Event, HomeAssistant


@pytest.fixture
def aiohttp_notify_servers_mock() -> Iterable[Mock]:
    """Construct mock AiohttpNotifyServer on demand, eliminating network use.

    This fixture provides a list of the constructed servers.
    """
    with patch(
        "homeassistant.components.dlna_dmr.data.AiohttpNotifyServer"
    ) as mock_constructor:
        servers = []

        def make_server(*_args, **_kwargs):
            server = Mock(spec=AiohttpNotifyServer)
            servers.append(server)
            server.event_handler = Mock(spec=UpnpEventHandler)
            return server

        mock_constructor.side_effect = make_server

        yield mock_constructor

        # Every server must be stopped if it was started
        for server in servers:
            assert (
                server.async_start_server.call_count
                == server.async_stop_server.call_count
            )


async def test_get_domain_data(hass: HomeAssistant) -> None:
    """Test the get_domain_data function returns the same data every time."""
    assert DOMAIN not in hass.data
    domain_data = get_domain_data(hass)
    assert domain_data is not None
    assert get_domain_data(hass) is domain_data


async def test_event_notifier(
    hass: HomeAssistant, aiohttp_notify_servers_mock: Mock
) -> None:
    """Test getting and releasing event notifiers."""
    domain_data = get_domain_data(hass)

    listen_addr = EventListenAddr(None, 0, None)
    event_notifier = await domain_data.async_get_event_notifier(listen_addr, hass)
    assert event_notifier is not None

    # Check that the parameters were passed through to the AiohttpNotifyServer
    aiohttp_notify_servers_mock.assert_called_with(
        requester=ANY, source=("0.0.0.0", 0), callback_url=None, loop=ANY
    )

    # Same address should give same notifier
    listen_addr_2 = EventListenAddr(None, 0, None)
    event_notifier_2 = await domain_data.async_get_event_notifier(listen_addr_2, hass)
    assert event_notifier_2 is event_notifier

    # Different address should give different notifier
    listen_addr_3 = EventListenAddr(
        "198.51.100.4", 9999, "http://198.51.100.4:9999/notify"
    )
    event_notifier_3 = await domain_data.async_get_event_notifier(listen_addr_3, hass)
    assert event_notifier_3 is not None
    assert event_notifier_3 is not event_notifier

    # Check that the parameters were passed through to the AiohttpNotifyServer
    aiohttp_notify_servers_mock.assert_called_with(
        requester=ANY,
        source=("198.51.100.4", 9999),
        callback_url="http://198.51.100.4:9999/notify",
        loop=ANY,
    )

    # There should be 2 notifiers total, one with 2 references, and a stop callback
    assert set(domain_data.event_notifiers.keys()) == {listen_addr, listen_addr_3}
    assert domain_data.event_notifier_refs == {listen_addr: 2, listen_addr_3: 1}
    assert domain_data.stop_listener_remove is not None

    # Releasing notifiers should delete them when they have not more references
    await domain_data.async_release_event_notifier(listen_addr)
    assert set(domain_data.event_notifiers.keys()) == {listen_addr, listen_addr_3}
    assert domain_data.event_notifier_refs == {listen_addr: 1, listen_addr_3: 1}
    assert domain_data.stop_listener_remove is not None

    await domain_data.async_release_event_notifier(listen_addr)
    assert set(domain_data.event_notifiers.keys()) == {listen_addr_3}
    assert domain_data.event_notifier_refs == {listen_addr: 0, listen_addr_3: 1}
    assert domain_data.stop_listener_remove is not None

    await domain_data.async_release_event_notifier(listen_addr_3)
    assert set(domain_data.event_notifiers.keys()) == set()
    assert domain_data.event_notifier_refs == {listen_addr: 0, listen_addr_3: 0}
    assert domain_data.stop_listener_remove is None


async def test_cleanup_event_notifiers(
    hass: HomeAssistant, aiohttp_notify_servers_mock: Mock
) -> None:
    """Test cleanup function clears all event notifiers."""
    domain_data = get_domain_data(hass)
    await domain_data.async_get_event_notifier(EventListenAddr(None, 0, None), hass)
    await domain_data.async_get_event_notifier(
        EventListenAddr(None, 0, "different"), hass
    )

    await domain_data.async_cleanup_event_notifiers(Event(EVENT_HOMEASSISTANT_STOP))

    assert not domain_data.event_notifiers
    assert not domain_data.event_notifier_refs