from datetime import date, datetime, time, timedelta
from unittest.mock import AsyncMock, MagicMock, patch

import pytest
from homeassistant.core import HomeAssistant
from homeassistant.exceptions import HomeAssistantError
from pytest_homeassistant_custom_component.common import MockConfigEntry

from custom_components.room_cal_ha.backends import BackendAuthError, BackendConnectError
from custom_components.room_cal_ha.const import (
  CONF_API_BASE_URL,
  CONF_CALDAV_URL,
  CONF_CALENDAR_NAME,
  CONF_RESERVATION_DEFAULTS,
  CONF_SYNC_MODE,
  DOMAIN,
  STORE_CURRENT,
  STORE_NEXT,
  SYNC_MODE_API,
  SYNC_MODE_CALDAV,
  SYNC_MODE_MANUAL,
)
from custom_components.room_cal_ha.coordinator import RoomCalCoordinator
from custom_components.room_cal_ha.models import OverrideData, ReservationData


SAMPLE = ReservationData(
  guest_name="Alice",
  check_in_date=date(2026, 7, 1),
  check_in_time=time(14, 0),
  check_out_date=date(2026, 7, 5),
  check_out_time=time(12, 0),
  wifi_key="stone-angel-market",
  door_code="0472",
)

_BASE_DATA = {
  "room_state_name": "Room State",
  "current_name": "Current",
  "next_name": "Next",
}


def _make_entry(hass, options: dict) -> MockConfigEntry:
  entry = MockConfigEntry(domain=DOMAIN, data=_BASE_DATA, options=options)
  entry.add_to_hass(hass)
  return entry


@pytest.fixture
async def coordinator(hass: HomeAssistant, mock_entry):
  mock_entry.add_to_hass(hass)
  coord = RoomCalCoordinator(hass, mock_entry)
  await coord.async_setup()
  return coord


# ---------------------------------------------------------------------------
# Manual mode
# ---------------------------------------------------------------------------

async def test_manual_mode_serves_empty(coordinator: RoomCalCoordinator):
  await coordinator.async_refresh()
  assert coordinator.data.current == ReservationData()
  assert coordinator.data.next == ReservationData()
  assert coordinator.data.current_last_refresh is None
  assert coordinator.data.next_last_refresh is None


# ---------------------------------------------------------------------------
# CalDAV mode
# ---------------------------------------------------------------------------

async def test_caldav_fetch_writes_store_and_timestamps(hass: HomeAssistant):
  entry = _make_entry(hass, {CONF_SYNC_MODE: SYNC_MODE_CALDAV, CONF_CALDAV_URL: "https://cal.example.com", CONF_CALENDAR_NAME: "Room"})
  coord = RoomCalCoordinator(hass, entry)
  await coord.async_setup()

  with patch("custom_components.room_cal_ha.coordinator.CalDavBackend") as MockBackend:
    MockBackend.return_value.async_fetch = AsyncMock(return_value=(SAMPLE, None))
    await coord.async_refresh()

  assert coord.data.current.guest_name == "Alice"
  assert coord.data.current.door_code == "0472"
  assert coord.data.next == ReservationData()
  assert coord.data.current_last_refresh is not None
  assert coord.data.next_last_refresh is not None


async def test_caldav_empty_result_clears_store(hass: HomeAssistant):
  entry = _make_entry(hass, {CONF_SYNC_MODE: SYNC_MODE_CALDAV, CONF_CALDAV_URL: "https://cal.example.com", CONF_CALENDAR_NAME: "Room"})
  coord = RoomCalCoordinator(hass, entry)
  await coord.async_setup()
  await coord.store.async_set(STORE_CURRENT, SAMPLE)

  with patch("custom_components.room_cal_ha.coordinator.CalDavBackend") as MockBackend:
    MockBackend.return_value.async_fetch = AsyncMock(return_value=(None, None))
    await coord.async_refresh()

  assert coord.data.current == ReservationData()
  assert coord.store.get(STORE_CURRENT) is None


async def test_caldav_connect_error_preserves_store(hass: HomeAssistant):
  entry = _make_entry(hass, {CONF_SYNC_MODE: SYNC_MODE_CALDAV, CONF_CALDAV_URL: "https://cal.example.com", CONF_CALENDAR_NAME: "Room"})
  coord = RoomCalCoordinator(hass, entry)
  await coord.async_setup()
  await coord.store.async_set(STORE_CURRENT, SAMPLE)

  with patch("custom_components.room_cal_ha.coordinator.CalDavBackend") as MockBackend:
    MockBackend.return_value.async_fetch = AsyncMock(side_effect=BackendConnectError("timeout"))
    await coord.async_refresh()

  assert coord.data.current.guest_name == "Alice"
  assert coord.data.current_last_refresh is None


async def test_caldav_auth_error_triggers_reauth(hass: HomeAssistant):
  entry = _make_entry(hass, {CONF_SYNC_MODE: SYNC_MODE_CALDAV, CONF_CALDAV_URL: "https://cal.example.com", CONF_CALENDAR_NAME: "Room"})
  coord = RoomCalCoordinator(hass, entry)
  await coord.async_setup()

  with (
    patch("custom_components.room_cal_ha.coordinator.CalDavBackend") as MockBackend,
    patch.object(entry, "async_start_reauth") as mock_reauth,
  ):
    MockBackend.return_value.async_fetch = AsyncMock(side_effect=BackendAuthError)
    await coord.async_refresh()

  mock_reauth.assert_called_once_with(hass)


# ---------------------------------------------------------------------------
# API mode
# ---------------------------------------------------------------------------

async def test_api_fetch_writes_store(hass: HomeAssistant):
  entry = _make_entry(hass, {CONF_SYNC_MODE: SYNC_MODE_API, CONF_API_BASE_URL: "https://api.example.com"})
  coord = RoomCalCoordinator(hass, entry)
  await coord.async_setup()

  with patch("custom_components.room_cal_ha.coordinator.RoomCalApiBackend") as MockBackend:
    instance = MockBackend.return_value
    instance.async_fetch = AsyncMock(return_value=(SAMPLE, None))
    await coord.async_refresh()

  assert coord.data.current.guest_name == "Alice"
  assert coord.data.current_last_refresh is not None


async def test_api_connect_error_preserves_store(hass: HomeAssistant):
  entry = _make_entry(hass, {CONF_SYNC_MODE: SYNC_MODE_API, CONF_API_BASE_URL: "https://api.example.com"})
  coord = RoomCalCoordinator(hass, entry)
  await coord.async_setup()
  await coord.store.async_set(STORE_CURRENT, SAMPLE)

  with patch("custom_components.room_cal_ha.coordinator.RoomCalApiBackend") as MockBackend:
    instance = MockBackend.return_value
    instance.async_fetch = AsyncMock(side_effect=BackendConnectError("timeout"))
    await coord.async_refresh()

  assert coord.data.current.guest_name == "Alice"
  assert coord.data.current_last_refresh is None


async def test_api_auth_error_triggers_reauth(hass: HomeAssistant):
  entry = _make_entry(hass, {CONF_SYNC_MODE: SYNC_MODE_API, CONF_API_BASE_URL: "https://api.example.com"})
  coord = RoomCalCoordinator(hass, entry)
  await coord.async_setup()

  with (
    patch("custom_components.room_cal_ha.coordinator.RoomCalApiBackend") as MockBackend,
    patch.object(entry, "async_start_reauth") as mock_reauth,
  ):
    instance = MockBackend.return_value
    instance.async_fetch = AsyncMock(side_effect=BackendAuthError)
    await coord.async_refresh()

  mock_reauth.assert_called_once_with(hass)


# ---------------------------------------------------------------------------
# Thin updates
# ---------------------------------------------------------------------------

async def test_thin_update_overlays_fields(coordinator: RoomCalCoordinator):
  await coordinator.store.async_set(STORE_CURRENT, SAMPLE)
  await coordinator.async_refresh()

  await coordinator.async_apply_update({"wifi_ssid": "GuestNet", "door_code": "9999"})

  assert coordinator.data.active.wifi_ssid == "GuestNet"
  assert coordinator.data.active.door_code == "9999"
  assert coordinator.data.active.guest_name == "Alice"
  assert coordinator.data.active.wifi_key == "stone-angel-market"
  # Current (pure backend mirror) is unaffected by the patch.
  assert coordinator.data.current.door_code == "0472"


async def test_thin_update_starts_an_override(coordinator: RoomCalCoordinator):
  await coordinator.store.async_set(STORE_CURRENT, SAMPLE)
  await coordinator.async_refresh()
  assert coordinator.data.override_active is False

  await coordinator.async_apply_update({"door_code": "1234"})
  assert coordinator.data.override_active is True


async def test_thin_update_updates_active_last_refresh(coordinator: RoomCalCoordinator):
  await coordinator.store.async_set(STORE_CURRENT, SAMPLE)
  await coordinator.async_refresh()
  assert coordinator.data.active_last_refresh is None

  await coordinator.async_apply_update({"door_code": "1234"})
  assert coordinator.data.active_last_refresh is not None


# ---------------------------------------------------------------------------
# last_updated
# ---------------------------------------------------------------------------

async def test_last_updated_set_when_backend_data_changes(hass: HomeAssistant):
  entry = _make_entry(hass, {CONF_SYNC_MODE: SYNC_MODE_CALDAV, CONF_CALDAV_URL: "https://cal.example.com", CONF_CALENDAR_NAME: "Room"})
  coord = RoomCalCoordinator(hass, entry)
  await coord.async_setup()

  next_sample = ReservationData(guest_name="Next")
  with patch("custom_components.room_cal_ha.coordinator.CalDavBackend") as MockBackend:
    MockBackend.return_value.async_fetch = AsyncMock(return_value=(SAMPLE, next_sample))
    await coord.async_refresh()

  assert coord.data.current_last_updated is not None
  assert coord.data.next_last_updated is not None


async def test_last_updated_not_set_when_backend_data_unchanged(hass: HomeAssistant):
  entry = _make_entry(hass, {CONF_SYNC_MODE: SYNC_MODE_CALDAV, CONF_CALDAV_URL: "https://cal.example.com", CONF_CALENDAR_NAME: "Room"})
  coord = RoomCalCoordinator(hass, entry)
  await coord.async_setup()
  await coord.store.async_set(STORE_CURRENT, SAMPLE)

  with patch("custom_components.room_cal_ha.coordinator.CalDavBackend") as MockBackend:
    MockBackend.return_value.async_fetch = AsyncMock(return_value=(SAMPLE, None))
    # First refresh populates self.data
    await coord.async_refresh()
    ts_after_first = coord.data.current_last_updated
    # Second refresh returns same data — last_updated must not change
    await coord.async_refresh()

  assert coord.data.current_last_updated == ts_after_first


async def test_last_updated_set_on_thin_update_with_change(coordinator: RoomCalCoordinator):
  await coordinator.store.async_set(STORE_CURRENT, SAMPLE)
  await coordinator.async_refresh()

  await coordinator.async_apply_update({"door_code": "9999"})
  assert coordinator.data.active_last_updated is not None


async def test_last_updated_not_set_on_thin_update_with_same_value(coordinator: RoomCalCoordinator):
  await coordinator.store.async_set(STORE_CURRENT, SAMPLE)
  await coordinator.async_refresh()

  # First update sets last_updated
  await coordinator.async_apply_update({"door_code": "9999"})
  ts = coordinator.data.active_last_updated

  # Second update with the same value must not advance last_updated
  await coordinator.async_apply_update({"door_code": "9999"})
  assert coordinator.data.active_last_updated == ts


async def test_last_updated_set_when_override_starts(coordinator: RoomCalCoordinator):
  await coordinator.async_refresh()
  coordinator._room_state_switch = None
  assert coordinator.data.active_last_updated is None

  await coordinator.async_start_override(OverrideData(active=ReservationData(guest_name="Override")))
  assert coordinator.data.active_last_updated is not None


async def test_last_updated_set_when_override_ends(coordinator: RoomCalCoordinator):
  coordinator._room_state_switch = None
  await coordinator.async_start_override(OverrideData(active=ReservationData(guest_name="Override")))
  ts_start = coordinator.data.active_last_updated

  await coordinator.store.async_set(STORE_CURRENT, SAMPLE)
  coordinator._override = OverrideData(active=ReservationData(guest_name="Override"))
  await coordinator.async_end_override()

  assert coordinator.data.active_last_updated != ts_start


async def test_last_updated_persists_across_reload(hass: HomeAssistant, mock_entry):
  mock_entry.add_to_hass(hass)
  coord = RoomCalCoordinator(hass, mock_entry)
  await coord.async_setup()
  await coord.store.async_set(STORE_CURRENT, SAMPLE)
  await coord.store.async_set_last_updated(STORE_CURRENT, datetime(2026, 1, 1, 12, 0, tzinfo=None))

  coord2 = RoomCalCoordinator(hass, mock_entry)
  await coord2.async_setup()

  loaded = coord2.store.get_last_updated(STORE_CURRENT)
  assert loaded is not None
  assert loaded.year == 2026


# ---------------------------------------------------------------------------
# Store persistence
# ---------------------------------------------------------------------------

async def test_store_persists_across_reload(hass: HomeAssistant, mock_entry):
  mock_entry.add_to_hass(hass)
  coord = RoomCalCoordinator(hass, mock_entry)
  await coord.async_setup()
  await coord.store.async_set(STORE_CURRENT, SAMPLE)

  coord2 = RoomCalCoordinator(hass, mock_entry)
  await coord2.async_setup()

  loaded = coord2.store.get(STORE_CURRENT)
  assert loaded is not None
  assert loaded.guest_name == "Alice"
  assert loaded.door_code == "0472"


# ---------------------------------------------------------------------------
# _reservation_window_state
# ---------------------------------------------------------------------------

DATED = ReservationData(
  check_in_date=date(2026, 7, 1),
  check_in_time=time(14, 0),
  check_out_date=date(2026, 7, 5),
  check_out_time=time(12, 0),
)


def _state_at(coordinator, res, dt_str):
  """Freeze dt_util.now() to a naive local datetime and call _reservation_window_state."""
  frozen = MagicMock()
  frozen.replace.return_value = datetime.fromisoformat(dt_str)  # naive, no TZ
  with patch("custom_components.room_cal_ha.coordinator.dt_util.now", return_value=frozen):
    return coordinator._reservation_window_state(res)


async def test_window_state_active(coordinator):
  assert _state_at(coordinator, DATED, "2026-07-03T10:00:00") == "active"


async def test_window_state_pending(coordinator):
  assert _state_at(coordinator, DATED, "2026-06-30T10:00:00") == "pending"


async def test_window_state_elapsed(coordinator):
  assert _state_at(coordinator, DATED, "2026-07-10T12:00:00") == "elapsed"


async def test_window_state_at_check_in_is_active(coordinator):
  assert _state_at(coordinator, DATED, "2026-07-01T14:00:00") == "active"


async def test_window_state_at_check_out_is_elapsed(coordinator):
  assert _state_at(coordinator, DATED, "2026-07-05T12:00:00") == "elapsed"


async def test_window_state_no_dates_returns_none(coordinator):
  assert coordinator._reservation_window_state(ReservationData()) is None


# ---------------------------------------------------------------------------
# Check-in WiFi key behavior
# ---------------------------------------------------------------------------

_WIFI_NEXT = ReservationData(
  guest_name="Bob",
  check_in_date=date(2026, 7, 1),
  check_in_time=time(14, 0),
  check_out_date=date(2026, 7, 5),
  check_out_time=time(12, 0),
  wifi_ssid="GuestNet",
  wifi_key="securepass",
)

# Freeze time at the check-in moment so the window registers as active during check-in tests.
_AT_CHECK_IN = MagicMock()
_AT_CHECK_IN.replace.return_value = datetime(2026, 7, 1, 14, 0, 0)

# Freeze time at (i.e. slightly after) the scheduled check-out moment — this is what
# `dt_util.now()` actually reads when a natural-checkout handler runs in production, and
# is the case that exposed the bug where checkout actions require re-deriving "was old
# active" from wall-clock time (see reservation_diff in models.py).
_AT_CHECK_OUT = MagicMock()
_AT_CHECK_OUT.replace.return_value = datetime(2026, 7, 5, 12, 0, 0)


async def test_check_in_calls_wifi_key(hass: HomeAssistant, coordinator: RoomCalCoordinator):
  await coordinator.store.async_set(STORE_NEXT, _WIFI_NEXT)
  mock_switch = MagicMock()
  mock_switch.async_turn_on = AsyncMock()
  coordinator._room_state_switch = mock_switch

  with (
    patch.object(coordinator, "_is_mode_sync_on", return_value=True),
    patch("custom_components.room_cal_ha.coordinator.dt_util.now", return_value=_AT_CHECK_IN),
    patch("custom_components.room_cal_ha.wifi.async_set_wifi_key", new_callable=AsyncMock) as mock_wifi,
    patch("custom_components.room_cal_ha.wifi.async_set_ssid_enabled", new_callable=AsyncMock) as mock_ssid,
  ):
    await coordinator._async_do_check_in()
  coordinator.cancel_mode_sync()

  mock_ssid.assert_awaited_once_with(hass, "GuestNet", True)
  mock_wifi.assert_awaited_once_with(hass, "GuestNet", "securepass")
  mock_switch.async_turn_on.assert_awaited_once()


async def test_check_in_skips_wifi_when_ssid_none(coordinator: RoomCalCoordinator):
  await coordinator.store.async_set(STORE_NEXT, ReservationData(wifi_ssid=None, wifi_key="securepass"))
  coordinator._room_state_switch = None

  with patch("custom_components.room_cal_ha.wifi.async_set_wifi_key", new_callable=AsyncMock) as mock_wifi:
    await coordinator._async_do_check_in()

  mock_wifi.assert_not_awaited()


async def test_check_in_skips_wifi_when_key_none(coordinator: RoomCalCoordinator):
  await coordinator.store.async_set(STORE_NEXT, ReservationData(wifi_ssid="GuestNet", wifi_key=None))
  coordinator._room_state_switch = None

  with patch("custom_components.room_cal_ha.wifi.async_set_wifi_key", new_callable=AsyncMock) as mock_wifi:
    await coordinator._async_do_check_in()

  mock_wifi.assert_not_awaited()


async def test_check_in_skips_wifi_when_key_empty_string(coordinator: RoomCalCoordinator):
  """An open-network default (wifi_key="") should not push a WPA password to UniFi."""
  await coordinator.store.async_set(STORE_NEXT, ReservationData(wifi_ssid="GuestNet", wifi_key=""))
  coordinator._room_state_switch = None

  with patch("custom_components.room_cal_ha.wifi.async_set_wifi_key", new_callable=AsyncMock) as mock_wifi:
    await coordinator._async_do_check_in()

  mock_wifi.assert_not_awaited()


async def test_check_in_skips_wifi_when_use_unifi_off(hass: HomeAssistant, coordinator: RoomCalCoordinator):
  await coordinator.store.async_set(STORE_NEXT, _WIFI_NEXT)
  mock_switch = MagicMock()
  mock_switch.async_turn_on = AsyncMock()
  coordinator._room_state_switch = mock_switch

  with (
    patch.object(coordinator, "_is_mode_sync_on", return_value=True),
    patch.object(coordinator, "_is_use_unifi_on", return_value=False),
    patch("custom_components.room_cal_ha.coordinator.dt_util.now", return_value=_AT_CHECK_IN),
    patch("custom_components.room_cal_ha.wifi.async_set_ssid_enabled", new_callable=AsyncMock) as mock_ssid,
    patch("custom_components.room_cal_ha.wifi.async_set_wifi_key", new_callable=AsyncMock) as mock_wifi,
  ):
    await coordinator._async_do_check_in()
  coordinator.cancel_mode_sync()

  mock_ssid.assert_not_awaited()
  mock_wifi.assert_not_awaited()
  mock_switch.async_turn_on.assert_awaited_once()


async def test_check_in_wifi_error_still_activates_guest_mode(coordinator: RoomCalCoordinator):
  await coordinator.store.async_set(STORE_NEXT, _WIFI_NEXT)
  mock_switch = MagicMock()
  mock_switch.async_turn_on = AsyncMock()
  coordinator._room_state_switch = mock_switch

  with (
    patch.object(coordinator, "_is_mode_sync_on", return_value=True),
    patch("custom_components.room_cal_ha.coordinator.dt_util.now", return_value=_AT_CHECK_IN),
    patch("custom_components.room_cal_ha.wifi.async_set_ssid_enabled", new_callable=AsyncMock),
    patch("custom_components.room_cal_ha.wifi.async_set_wifi_key", side_effect=HomeAssistantError("hub down")),
  ):
    await coordinator._async_do_check_in()
  coordinator.cancel_mode_sync()

  mock_switch.async_turn_on.assert_awaited_once()


# ---------------------------------------------------------------------------
# Check-out SSID disable behavior
# ---------------------------------------------------------------------------

async def test_check_out_disables_ssid(hass: HomeAssistant, coordinator: RoomCalCoordinator):
  await coordinator.store.async_set(STORE_CURRENT, _WIFI_NEXT)
  mock_switch = MagicMock()
  mock_switch.async_turn_off = AsyncMock()
  coordinator._room_state_switch = mock_switch

  with (
    patch.object(coordinator, "_is_mode_sync_on", return_value=True),
    patch("custom_components.room_cal_ha.coordinator.dt_util.now", return_value=_AT_CHECK_OUT),
    patch("custom_components.room_cal_ha.wifi.async_set_ssid_enabled", new_callable=AsyncMock) as mock_ssid,
  ):
    await coordinator._async_do_check_out()

  mock_ssid.assert_awaited_once_with(hass, "GuestNet", False)
  mock_switch.async_turn_off.assert_awaited_once()


async def test_check_out_skips_ssid_when_ssid_none(coordinator: RoomCalCoordinator):
  await coordinator.store.async_set(STORE_CURRENT, ReservationData(wifi_ssid=None))
  coordinator._room_state_switch = None

  with patch("custom_components.room_cal_ha.wifi.async_set_ssid_enabled", new_callable=AsyncMock) as mock_ssid:
    await coordinator._async_do_check_out()

  mock_ssid.assert_not_awaited()


async def test_check_out_skips_ssid_when_use_unifi_off(coordinator: RoomCalCoordinator):
  await coordinator.store.async_set(STORE_CURRENT, _WIFI_NEXT)
  coordinator._room_state_switch = None

  with (
    patch.object(coordinator, "_is_mode_sync_on", return_value=True),
    patch.object(coordinator, "_is_use_unifi_on", return_value=False),
    patch("custom_components.room_cal_ha.wifi.async_set_ssid_enabled", new_callable=AsyncMock) as mock_ssid,
  ):
    await coordinator._async_do_check_out()

  mock_ssid.assert_not_awaited()


async def test_check_out_ssid_error_still_deactivates_guest_mode(coordinator: RoomCalCoordinator):
  await coordinator.store.async_set(STORE_CURRENT, _WIFI_NEXT)
  mock_switch = MagicMock()
  mock_switch.async_turn_off = AsyncMock()
  coordinator._room_state_switch = mock_switch

  with (
    patch.object(coordinator, "_is_mode_sync_on", return_value=True),
    patch("custom_components.room_cal_ha.coordinator.dt_util.now", return_value=_AT_CHECK_OUT),
    patch("custom_components.room_cal_ha.wifi.async_set_ssid_enabled", side_effect=HomeAssistantError("hub down")),
  ):
    await coordinator._async_do_check_out()

  mock_switch.async_turn_off.assert_awaited_once()


# ---------------------------------------------------------------------------
# async_start_override / async_end_override
# ---------------------------------------------------------------------------

_OVERRIDE_RES = ReservationData(guest_name="Override Guest", door_code="1111")
_WIFI_OVERRIDE = ReservationData(guest_name="WiFi Guest", wifi_ssid="GuestNet", wifi_key="secret")


async def test_start_override_sets_active_in_data(coordinator: RoomCalCoordinator):
  coordinator._room_state_switch = None
  await coordinator.async_start_override(OverrideData(active=_OVERRIDE_RES))
  assert coordinator.data.active.guest_name == "Override Guest"
  # Current (pure backend mirror) is unaffected by the override.
  assert coordinator.data.current.guest_name is None


async def test_start_override_sets_override_active_flag(coordinator: RoomCalCoordinator):
  coordinator._room_state_switch = None
  await coordinator.async_start_override(OverrideData(active=_OVERRIDE_RES))
  assert coordinator.data.override_active is True


async def test_start_override_cancels_mode_sync(coordinator: RoomCalCoordinator):
  cancel1, cancel2 = MagicMock(), MagicMock()
  coordinator._mode_sync_handles = [cancel1, cancel2]
  coordinator._room_state_switch = None
  await coordinator.async_start_override(OverrideData(active=_OVERRIDE_RES))
  cancel1.assert_called_once()
  cancel2.assert_called_once()
  assert coordinator._mode_sync_handles == []


async def test_start_override_turns_on_guest_mode(coordinator: RoomCalCoordinator):
  mock_switch = MagicMock()
  mock_switch.async_turn_on = AsyncMock()
  coordinator._room_state_switch = mock_switch
  active_override = ReservationData(
    guest_name=_OVERRIDE_RES.guest_name, door_code=_OVERRIDE_RES.door_code,
    check_in_date=date(2026, 7, 1), check_in_time=time(14, 0),
    check_out_date=date(2026, 7, 5), check_out_time=time(12, 0),
  )
  with (
    patch.object(coordinator, "_is_mode_sync_on", return_value=True),
    patch("custom_components.room_cal_ha.coordinator.dt_util.now", return_value=_AT_CHECK_IN),
  ):
    await coordinator.async_start_override(OverrideData(active=active_override))
  coordinator.cancel_mode_sync()
  mock_switch.async_turn_on.assert_awaited_once()


async def test_start_override_does_not_turn_on_guest_mode_when_mode_sync_off(coordinator: RoomCalCoordinator):
  mock_switch = MagicMock()
  mock_switch.async_turn_on = AsyncMock()
  coordinator._room_state_switch = mock_switch
  with patch.object(coordinator, "_is_mode_sync_on", return_value=False):
    await coordinator.async_start_override(OverrideData(active=_OVERRIDE_RES))
  mock_switch.async_turn_on.assert_not_awaited()


async def test_start_override_calls_wifi_when_credentials_present(hass: HomeAssistant, coordinator: RoomCalCoordinator):
  coordinator._room_state_switch = MagicMock()
  coordinator._room_state_switch.async_turn_on = AsyncMock()
  active_wifi_override = ReservationData(
    guest_name=_WIFI_OVERRIDE.guest_name, wifi_ssid=_WIFI_OVERRIDE.wifi_ssid, wifi_key=_WIFI_OVERRIDE.wifi_key,
    check_in_date=date(2026, 7, 1), check_in_time=time(14, 0),
    check_out_date=date(2026, 7, 5), check_out_time=time(12, 0),
  )
  with (
    patch.object(coordinator, "_is_mode_sync_on", return_value=True),
    patch("custom_components.room_cal_ha.coordinator.dt_util.now", return_value=_AT_CHECK_IN),
    patch("custom_components.room_cal_ha.wifi.async_set_wifi_key", new_callable=AsyncMock) as mock_wifi,
  ):
    await coordinator.async_start_override(OverrideData(active=active_wifi_override))
  coordinator.cancel_mode_sync()
  mock_wifi.assert_awaited_once_with(hass, "GuestNet", "secret")


async def test_start_override_skips_wifi_when_mode_sync_off(coordinator: RoomCalCoordinator):
  coordinator._room_state_switch = None
  with (
    patch.object(coordinator, "_is_mode_sync_on", return_value=False),
    patch("custom_components.room_cal_ha.wifi.async_set_wifi_key", new_callable=AsyncMock) as mock_wifi,
  ):
    await coordinator.async_start_override(OverrideData(active=_WIFI_OVERRIDE))
  mock_wifi.assert_not_awaited()


async def test_start_override_skips_wifi_when_ssid_missing(coordinator: RoomCalCoordinator):
  coordinator._room_state_switch = None
  no_ssid = ReservationData(wifi_ssid=None, wifi_key="secret")
  with patch("custom_components.room_cal_ha.wifi.async_set_wifi_key", new_callable=AsyncMock) as mock_wifi:
    await coordinator.async_start_override(OverrideData(active=no_ssid))
  mock_wifi.assert_not_awaited()


async def test_start_override_next_always_mirrors_store(coordinator: RoomCalCoordinator):
  """There's no such thing as an override-owned Next — Next always mirrors the
  store's own feed, regardless of any override on active."""
  await coordinator.store.async_set(STORE_NEXT, SAMPLE)
  coordinator._room_state_switch = None
  await coordinator.async_start_override(OverrideData(active=_OVERRIDE_RES))
  assert coordinator.data.next.guest_name == "Alice"


async def test_start_override_applies_defaults_to_current(hass: HomeAssistant):
  entry = MockConfigEntry(
    domain=DOMAIN,
    data={},
    options={
      CONF_SYNC_MODE: SYNC_MODE_MANUAL,
      CONF_RESERVATION_DEFAULTS: {"wifi_ssid": "DefaultSSID", "check_out_time": "11:00:00"},
    },
  )
  entry.add_to_hass(hass)
  coord = RoomCalCoordinator(hass, entry)
  await coord.async_setup()
  coord._guest_mode_switch = None

  partial_override = ReservationData(guest_name="Override Guest")
  await coord.async_start_override(OverrideData(active=partial_override))

  assert coord.data.active.guest_name == "Override Guest"
  assert coord.data.active.wifi_ssid == "DefaultSSID"
  assert coord.data.active.check_out_time == time(11, 0)


async def test_start_override_defaults_do_not_overwrite_explicit_fields(hass: HomeAssistant):
  entry = MockConfigEntry(
    domain=DOMAIN,
    data={},
    options={
      CONF_SYNC_MODE: SYNC_MODE_MANUAL,
      CONF_RESERVATION_DEFAULTS: {"wifi_ssid": "DefaultSSID"},
    },
  )
  entry.add_to_hass(hass)
  coord = RoomCalCoordinator(hass, entry)
  await coord.async_setup()
  coord._guest_mode_switch = None

  explicit_override = ReservationData(guest_name="Override Guest", wifi_ssid="ExplicitSSID")
  await coord.async_start_override(OverrideData(active=explicit_override))

  assert coord.data.active.wifi_ssid == "ExplicitSSID"


async def test_refresh_during_override_applies_defaults_to_current(hass: HomeAssistant):
  entry = MockConfigEntry(
    domain=DOMAIN,
    data={},
    options={
      CONF_SYNC_MODE: SYNC_MODE_MANUAL,
      CONF_RESERVATION_DEFAULTS: {"door_code": "9999"},
    },
  )
  entry.add_to_hass(hass)
  coord = RoomCalCoordinator(hass, entry)
  await coord.async_setup()
  coord._guest_mode_switch = None

  partial_override = ReservationData(guest_name="Override Guest")
  await coord.async_start_override(OverrideData(active=partial_override))
  await coord.async_refresh()

  assert coord.data.active.guest_name == "Override Guest"
  assert coord.data.active.door_code == "9999"


async def test_start_override_applies_defaults_to_store_next(hass: HomeAssistant):
  entry = MockConfigEntry(
    domain=DOMAIN,
    data={},
    options={
      CONF_SYNC_MODE: SYNC_MODE_MANUAL,
      CONF_RESERVATION_DEFAULTS: {"wifi_ssid": "DefaultSSID"},
    },
  )
  entry.add_to_hass(hass)
  coord = RoomCalCoordinator(hass, entry)
  await coord.async_setup()
  coord._guest_mode_switch = None

  await coord.store.async_set(STORE_NEXT, ReservationData(guest_name="Next Guest"))
  await coord.async_start_override(OverrideData(active=_OVERRIDE_RES))

  assert coord.data.next.guest_name == "Next Guest"
  assert coord.data.next.wifi_ssid == "DefaultSSID"


async def test_end_override_clears_override_active(coordinator: RoomCalCoordinator):
  coordinator._room_state_switch = None
  coordinator._override = OverrideData(active=_OVERRIDE_RES)
  await coordinator.async_end_override()
  assert coordinator.data.override_active is False


async def test_end_override_restores_store_current(coordinator: RoomCalCoordinator):
  await coordinator.store.async_set(STORE_CURRENT, SAMPLE)
  coordinator._room_state_switch = None
  coordinator._override = OverrideData(active=_OVERRIDE_RES)
  await coordinator.async_end_override()
  assert coordinator.data.active.guest_name == "Alice"


async def test_start_override_with_end_at_schedules_and_ends_override(coordinator: RoomCalCoordinator):
  coordinator._room_state_switch = None
  override = OverrideData(active=ReservationData(guest_name="Timed Guest"))
  with (
    patch.object(coordinator, "_is_mode_sync_on", return_value=False),
    patch("custom_components.room_cal_ha.coordinator.dt_util.now", return_value=_AT_CHECK_IN),
  ):
    await coordinator.async_start_override(override, end_at=datetime(2026, 7, 1, 14, 5, 0))
  scheduled_handle = coordinator._override_end_handle
  assert scheduled_handle is not None
  assert coordinator.data.override_active is True

  # Simulate the scheduled call_later firing, then cancel the real (never-fired) handle
  # so it doesn't leak into the next test.
  await coordinator._async_do_override_timeout()
  scheduled_handle()

  assert coordinator._override_end_handle is None
  assert coordinator.data.override_active is False


async def test_stale_override_timeout_does_not_end_a_replacing_override(coordinator: RoomCalCoordinator):
  """A timer from an override that was already manually ended/replaced must not end
  whatever override is active by the time it fires."""
  coordinator._room_state_switch = None
  override = OverrideData(active=ReservationData(guest_name="Timed Guest"))
  with (
    patch.object(coordinator, "_is_mode_sync_on", return_value=False),
    patch("custom_components.room_cal_ha.coordinator.dt_util.now", return_value=_AT_CHECK_IN),
  ):
    await coordinator.async_start_override(override, end_at=datetime(2026, 7, 1, 14, 5, 0))
  stale_target = coordinator._override_end_target

  await coordinator.async_end_override()
  assert coordinator._override is None

  new_override = OverrideData(active=ReservationData(guest_name="New Guest"))
  with patch.object(coordinator, "_is_mode_sync_on", return_value=False):
    await coordinator.async_start_override(new_override)  # no end_at — no new timer
  # Simulate the original (stale) timer's callback firing late, after the replacement started.
  coordinator._override_end_target = stale_target

  await coordinator._async_do_override_timeout()

  assert coordinator._override is new_override
  assert coordinator.data.override_active is True


async def test_start_override_empty_current_triggers_checkout_not_checkin(
  hass: HomeAssistant, coordinator: RoomCalCoordinator
):
  """Overriding Current to empty while a real guest is checked in must run checkout
  actions (SSID disable, guest-mode off) — not try to check in an empty record."""
  checked_in_guest = ReservationData(
    guest_name="Real Guest",
    check_in_date=date(2026, 7, 1), check_in_time=time(14, 0),
    check_out_date=date(2026, 7, 5), check_out_time=time(12, 0),
    wifi_ssid="GuestNet", wifi_key="secret",
  )
  await coordinator.store.async_set(STORE_CURRENT, checked_in_guest)
  mock_switch = MagicMock()
  mock_switch.async_turn_off = AsyncMock()
  mock_switch.async_turn_on = AsyncMock()
  coordinator._room_state_switch = mock_switch

  with (
    patch.object(coordinator, "_is_mode_sync_on", return_value=True),
    patch("custom_components.room_cal_ha.coordinator.dt_util.now", return_value=_AT_CHECK_IN),
    patch("custom_components.room_cal_ha.wifi.async_set_ssid_enabled", new_callable=AsyncMock) as mock_ssid,
  ):
    await coordinator.async_start_override(OverrideData(active=ReservationData()))
  coordinator.cancel_mode_sync()

  mock_ssid.assert_awaited_once_with(hass, "GuestNet", False)
  mock_switch.async_turn_off.assert_awaited_once()
  mock_switch.async_turn_on.assert_not_awaited()
  assert coordinator.data.override_active is True


async def test_override_active_schedules_no_mode_sync_handles(
  hass: HomeAssistant, coordinator: RoomCalCoordinator
):
  """While an override is active, no Store-driven check-in/check-out handles are
  scheduled — an override parks Active until it's ended manually or its own end_at
  timer fires. Next's check-in time elapsing (Store empty -> occupied) must not
  overwrite the override."""
  override_guest = ReservationData(
    guest_name="Override Guest",
    check_in_date=date(2026, 7, 1), check_in_time=time(14, 0),
    check_out_date=date(2026, 7, 5), check_out_time=time(12, 0),
  )
  mock_switch = MagicMock()
  mock_switch.async_turn_on = AsyncMock()
  mock_switch.async_turn_off = AsyncMock()
  coordinator._room_state_switch = mock_switch

  await coordinator.store.async_set(STORE_NEXT, ReservationData(
    guest_name="Next Guest",
    check_in_date=date(2026, 7, 1), check_in_time=time(13, 0),
  ))

  with (
    patch.object(coordinator, "_is_mode_sync_on", return_value=True),
    patch("custom_components.room_cal_ha.coordinator.dt_util.now", return_value=_AT_CHECK_IN),
  ):
    await coordinator.async_start_override(OverrideData(active=override_guest))

  assert coordinator._mode_sync_handles == []
  assert coordinator.data.override_active is True
  assert coordinator.data.active.guest_name == "Override Guest"


async def test_ending_override_reschedules_mode_sync_from_store(
  hass: HomeAssistant, coordinator: RoomCalCoordinator
):
  """Ending an override re-arms the normal check-in/check-out handles from whatever
  the Store currently holds — the same reconcile-and-reschedule path used at startup."""
  override_guest = ReservationData(
    guest_name="Override Guest",
    check_in_date=date(2026, 7, 1), check_in_time=time(14, 0),
    check_out_date=date(2026, 7, 5), check_out_time=time(12, 0),
  )
  coordinator._room_state_switch = None
  await coordinator.store.async_set(STORE_NEXT, ReservationData(
    guest_name="Next Guest",
    check_in_date=date(2026, 7, 1), check_in_time=time(15, 0),
  ))

  with (
    patch.object(coordinator, "_is_mode_sync_on", return_value=True),
    patch("custom_components.room_cal_ha.coordinator.dt_util.now", return_value=_AT_CHECK_IN),
  ):
    await coordinator.async_start_override(OverrideData(active=override_guest))
    assert coordinator._mode_sync_handles == []

    await coordinator.async_end_override()

  assert coordinator.data.override_active is False
  # The check-in handle for Next Guest (15:00, still in the future relative to
  # _AT_CHECK_IN) is re-armed now that the override no longer owns Active.
  assert len(coordinator._mode_sync_handles) >= 1
  coordinator.cancel_mode_sync()


# ---------------------------------------------------------------------------
# Thin updates during override
# ---------------------------------------------------------------------------

async def test_thin_update_during_override_updates_override_not_store(coordinator: RoomCalCoordinator):
  await coordinator.store.async_set(STORE_CURRENT, SAMPLE)
  await coordinator.async_refresh()
  coordinator._override = OverrideData(active=_OVERRIDE_RES)

  await coordinator.async_apply_update({"door_code": "9999"})

  assert coordinator.data.active.door_code == "9999"
  # Store is unchanged
  assert coordinator.store.get(STORE_CURRENT).door_code == "0472"


async def test_thin_update_during_override_data_still_shows_override_active(coordinator: RoomCalCoordinator):
  await coordinator.async_refresh()
  coordinator._override = OverrideData(active=_OVERRIDE_RES)
  await coordinator.async_apply_update({"door_code": "9999"})
  assert coordinator.data.override_active is True


async def test_thin_update_with_no_override_running_starts_one(coordinator: RoomCalCoordinator):
  """Patching with no override active must snapshot `active` as an override first,
  so the patch survives the next backend poll instead of being silently overwritten."""
  await coordinator.store.async_set(STORE_CURRENT, SAMPLE)
  await coordinator.async_refresh()
  assert coordinator.data.override_active is False

  await coordinator.async_apply_update({"guest_name": "Patched Guest"})

  assert coordinator.data.override_active is True
  assert coordinator.data.active.guest_name == "Patched Guest"
  # Store's own current is untouched by the patch.
  assert coordinator.store.get(STORE_CURRENT).guest_name == "Alice"


# ---------------------------------------------------------------------------
# Backend fetch during override preserves override display
# ---------------------------------------------------------------------------

async def test_backend_fetch_during_override_updates_store_but_preserves_override(hass: HomeAssistant):
  entry = _make_entry(hass, {CONF_SYNC_MODE: SYNC_MODE_CALDAV, CONF_CALDAV_URL: "https://cal.example.com", CONF_CALENDAR_NAME: "Room"})
  coord = RoomCalCoordinator(hass, entry)
  await coord.async_setup()
  coord._override = OverrideData(active=_OVERRIDE_RES)

  backend_data = ReservationData(guest_name="Backend Alice")
  with patch("custom_components.room_cal_ha.coordinator.CalDavBackend") as MockBackend:
    MockBackend.return_value.async_fetch = AsyncMock(return_value=(backend_data, None))
    await coord.async_refresh()

  # Store was written by the backend
  assert coord.store.get(STORE_CURRENT).guest_name == "Backend Alice"
  # But displayed active still shows the override; current mirrors the fresh backend write.
  assert coord.data.active.guest_name == "Override Guest"
  assert coord.data.current.guest_name == "Backend Alice"
  assert coord.data.override_active is True


# ---------------------------------------------------------------------------
# async_reconcile_from_store (shared helper)
# ---------------------------------------------------------------------------

_ACTIVE = ReservationData(
  guest_name="Active Guest",
  check_in_date=date(2026, 6, 20),
  check_in_time=time(14, 0),
  check_out_date=date(2026, 6, 25),
  check_out_time=time(12, 0),
)

_ELAPSED = ReservationData(
  guest_name="Past Guest",
  check_in_date=date(2026, 6, 1),
  check_in_time=time(14, 0),
  check_out_date=date(2026, 6, 5),
  check_out_time=time(12, 0),
)

_FUTURE = ReservationData(
  guest_name="Future Guest",
  check_in_date=date(2026, 7, 1),
  check_in_time=time(14, 0),
  check_out_date=date(2026, 7, 5),
  check_out_time=time(12, 0),
)

# Freeze time at 2026-06-22 12:00 local (naive)
_RECONCILE_NOW = MagicMock()
_RECONCILE_NOW.replace.return_value = datetime(2026, 6, 22, 12, 0, 0)


async def test_reconcile_active_current_turns_on_guest_mode(coordinator: RoomCalCoordinator):
  await coordinator.store.async_set(STORE_CURRENT, _ACTIVE)
  mock_switch = MagicMock()
  mock_switch.async_turn_on = AsyncMock()
  mock_switch.async_turn_off = AsyncMock()
  coordinator._room_state_switch = mock_switch

  with (
    patch.object(coordinator, "_is_mode_sync_on", return_value=True),
    patch("custom_components.room_cal_ha.coordinator.dt_util.now", return_value=_RECONCILE_NOW),
  ):
    await coordinator.async_reconcile_from_store()
  coordinator.cancel_mode_sync()

  mock_switch.async_turn_on.assert_awaited_once()
  mock_switch.async_turn_off.assert_not_awaited()


async def test_reconcile_elapsed_current_clears_store_and_turns_off_guest_mode(coordinator: RoomCalCoordinator):
  await coordinator.store.async_set(STORE_CURRENT, _ELAPSED)
  mock_switch = MagicMock()
  mock_switch.async_turn_on = AsyncMock()
  mock_switch.async_turn_off = AsyncMock()
  coordinator._room_state_switch = mock_switch

  with (
    patch.object(coordinator, "_is_mode_sync_on", return_value=True),
    patch("custom_components.room_cal_ha.coordinator.dt_util.now", return_value=_RECONCILE_NOW),
  ):
    await coordinator.async_reconcile_from_store()

  assert coordinator.store.get(STORE_CURRENT) is None
  mock_switch.async_turn_off.assert_awaited_once()


async def test_reconcile_promotes_next_when_check_in_elapsed(coordinator: RoomCalCoordinator):
  await coordinator.store.async_set(STORE_NEXT, _ACTIVE)

  with (
    patch.object(coordinator, "_is_mode_sync_on", return_value=True),
    patch("custom_components.room_cal_ha.coordinator.dt_util.now", return_value=_RECONCILE_NOW),
  ):
    await coordinator.async_reconcile_from_store()
  coordinator.cancel_mode_sync()

  assert coordinator.store.get(STORE_CURRENT).guest_name == "Active Guest"


async def test_reconcile_turns_off_guest_mode_when_store_already_cleared(coordinator: RoomCalCoordinator):
  """Store was cleared (e.g. checkout write ran) but guest-mode-off action never ran."""
  # No current reservation in store — it was already cleared before HA was disabled.
  mock_switch = MagicMock()
  mock_switch.async_turn_on = AsyncMock()
  mock_switch.async_turn_off = AsyncMock()
  coordinator._room_state_switch = mock_switch

  with (
    patch.object(coordinator, "_is_mode_sync_on", return_value=True),
    patch("custom_components.room_cal_ha.coordinator.dt_util.now", return_value=_RECONCILE_NOW),
  ):
    await coordinator.async_reconcile_from_store()
  coordinator.cancel_mode_sync()

  mock_switch.async_turn_off.assert_awaited_once()
  mock_switch.async_turn_on.assert_not_awaited()


async def test_reconcile_does_not_touch_guest_mode_when_mode_sync_off(coordinator: RoomCalCoordinator):
  await coordinator.store.async_set(STORE_CURRENT, _ACTIVE)
  mock_switch = MagicMock()
  mock_switch.async_turn_on = AsyncMock()
  mock_switch.async_turn_off = AsyncMock()
  coordinator._room_state_switch = mock_switch

  with (
    patch.object(coordinator, "_is_mode_sync_on", return_value=False),
    patch("custom_components.room_cal_ha.coordinator.dt_util.now", return_value=_RECONCILE_NOW),
  ):
    await coordinator.async_reconcile_from_store()

  mock_switch.async_turn_on.assert_not_awaited()
  mock_switch.async_turn_off.assert_not_awaited()


# ---------------------------------------------------------------------------
# _diff_with_unifi_check
# ---------------------------------------------------------------------------

_ACTIVE_WIFI_RES = ReservationData(
  check_in_date=date(2026, 7, 1),
  check_in_time=time(14, 0),
  check_out_date=date(2026, 7, 5),
  check_out_time=time(12, 0),
  wifi_ssid="GuestNet",
  wifi_key="correct-key",
)
_DURING_WINDOW = datetime(2026, 7, 3, 12, 0, 0)


def _unifi_diff(coordinator, old, new, now, *, enabled, key):
  with (
    patch.object(coordinator, "_is_use_unifi_on", return_value=True),
    patch("custom_components.room_cal_ha.wifi.get_wlan_state", return_value=(enabled, key)),
  ):
    return coordinator._diff_with_unifi_check(old, new, now)


async def test_unifi_diff_ssid_disabled_adds_checkin_needed(coordinator):
  diff = _unifi_diff(coordinator, None, _ACTIVE_WIFI_RES, _DURING_WINDOW, enabled=False, key="correct-key")
  assert diff.checkin_needed


async def test_unifi_diff_key_mismatch_adds_wifi_key_changed(coordinator):
  diff = _unifi_diff(coordinator, _ACTIVE_WIFI_RES, _ACTIVE_WIFI_RES, _DURING_WINDOW, enabled=True, key="wrong-key")
  assert diff.wifi_key_changed


async def test_unifi_diff_ssid_disabled_and_key_wrong_sets_both(coordinator):
  diff = _unifi_diff(coordinator, _ACTIVE_WIFI_RES, _ACTIVE_WIFI_RES, _DURING_WINDOW, enabled=False, key="wrong-key")
  assert diff.checkin_needed
  assert diff.wifi_key_changed


async def test_unifi_diff_state_matches_no_extra_flags(coordinator):
  diff = _unifi_diff(coordinator, _ACTIVE_WIFI_RES, _ACTIVE_WIFI_RES, _DURING_WINDOW, enabled=True, key="correct-key")
  assert not diff.has_changes


async def test_unifi_diff_skipped_when_use_unifi_off(coordinator):
  with (
    patch.object(coordinator, "_is_use_unifi_on", return_value=False),
    patch("custom_components.room_cal_ha.wifi.get_wlan_state") as mock_get,
  ):
    diff = coordinator._diff_with_unifi_check(_ACTIVE_WIFI_RES, _ACTIVE_WIFI_RES, _DURING_WINDOW)
  mock_get.assert_not_called()
  assert not diff.has_changes  # base diff: same record, no changes; unifi check skipped


async def test_unifi_diff_skipped_when_window_not_active(coordinator):
  # Unchanged record (no occupancy transition) isolates the UniFi drift-check gate itself:
  # even with use_unifi on, no wall-clock-active window means no drift check is made.
  before_window = datetime(2026, 6, 30, 12, 0, 0)
  with (
    patch.object(coordinator, "_is_use_unifi_on", return_value=True),
    patch("custom_components.room_cal_ha.wifi.get_wlan_state") as mock_get,
  ):
    diff = coordinator._diff_with_unifi_check(_ACTIVE_WIFI_RES, _ACTIVE_WIFI_RES, before_window)
  mock_get.assert_not_called()
  assert not diff.has_changes


async def test_unifi_diff_skipped_when_hub_unavailable(coordinator):
  diff = _unifi_diff(coordinator, _ACTIVE_WIFI_RES, _ACTIVE_WIFI_RES, _DURING_WINDOW, enabled=None, key=None)
  assert not diff.has_changes


async def test_unifi_diff_key_check_skipped_when_actual_key_none(coordinator):
  # Controller doesn't expose passphrase — only enabled state checked.
  diff = _unifi_diff(coordinator, _ACTIVE_WIFI_RES, _ACTIVE_WIFI_RES, _DURING_WINDOW, enabled=True, key=None)
  assert not diff.has_changes


async def test_unifi_diff_preserves_original_diff_flags(coordinator):
  # Even when UniFi state is clean, original checkin_needed from the base diff is kept.
  old_inactive = ReservationData(wifi_ssid="GuestNet", wifi_key="correct-key")  # no dates → not active
  diff = _unifi_diff(coordinator, old_inactive, _ACTIVE_WIFI_RES, _DURING_WINDOW, enabled=True, key="correct-key")
  assert diff.checkin_needed  # from reservation_diff: old not active, new is active