"""Tests for Arrived/Departed binary sensors, Guest Arrived/Departed buttons,
and coordinator arrived/departed flag lifecycle.

Uses object.__new__ for pure-unit tests and hass fixtures for coordinator integration.
"""
from datetime import date, time
from unittest.mock import AsyncMock, MagicMock, patch

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

from custom_components.room_cal_ha.binary_sensor import ArrivedSensor, DepartedSensor
from custom_components.room_cal_ha.button import (
  GuestArrivedButton,
  GuestDepartedButton,
  GuestEnteredButton,
)
from custom_components.room_cal_ha.const import (
  CONF_SYNC_MODE,
  DOMAIN,
  STORE_CURRENT,
  STORE_NEXT,
  SYNC_MODE_CALDAV,
  SYNC_MODE_MANUAL,
)
from custom_components.room_cal_ha.coordinator import CoordinatorData, RoomCalCoordinator
from custom_components.room_cal_ha.models import ReservationData


_ALICE = 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),
)

_BOB = ReservationData(
  guest_name="Bob",
  check_in_date=date(2026, 7, 6),
  check_in_time=time(15, 0),
  check_out_date=date(2026, 7, 10),
  check_out_time=time(11, 0),
)

_BASE_DATA = {"room_state_name": "Room State"}


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


# ---------------------------------------------------------------------------
# ArrivedSensor / DepartedSensor unit tests
# ---------------------------------------------------------------------------

def _data(arrived=False, departed=False) -> CoordinatorData:
  return CoordinatorData(
    active=ReservationData(),
    current=ReservationData(),
    next=ReservationData(),
    current_last_refresh=None,
    next_last_refresh=None,
    active_arrived=arrived,
    active_departed=departed,
  )


def _arrived_sensor(arrived=False) -> ArrivedSensor:
  s = object.__new__(ArrivedSensor)
  s.coordinator = MagicMock()
  s.coordinator.data = _data(arrived=arrived)
  return s


def _departed_sensor(departed=False) -> DepartedSensor:
  s = object.__new__(DepartedSensor)
  s.coordinator = MagicMock()
  s.coordinator.data = _data(departed=departed)
  return s


def test_arrived_sensor_default_false():
  assert _arrived_sensor(arrived=False).is_on is False


def test_arrived_sensor_true_when_set():
  assert _arrived_sensor(arrived=True).is_on is True


def test_departed_sensor_default_false():
  assert _departed_sensor(departed=False).is_on is False


def test_departed_sensor_true_when_set():
  assert _departed_sensor(departed=True).is_on is True


# ---------------------------------------------------------------------------
# GuestArrivedButton / GuestDepartedButton unit tests
# ---------------------------------------------------------------------------

def _arrived_button() -> GuestArrivedButton:
  btn = object.__new__(GuestArrivedButton)
  btn._coordinator = MagicMock()
  btn._coordinator.async_set_arrived = AsyncMock()
  return btn


def _departed_button() -> GuestDepartedButton:
  btn = object.__new__(GuestDepartedButton)
  btn._coordinator = MagicMock()
  btn._coordinator.async_set_departed = AsyncMock()
  return btn


async def test_arrived_button_calls_set_arrived_true():
  btn = _arrived_button()
  await btn.async_press()
  btn._coordinator.async_set_arrived.assert_awaited_once_with(True)


async def test_departed_button_calls_set_departed_true():
  btn = _departed_button()
  await btn.async_press()
  btn._coordinator.async_set_departed.assert_awaited_once_with(True)


# ---------------------------------------------------------------------------
# GuestEnteredButton unit tests
# ---------------------------------------------------------------------------

def _entered_button(arrived=False) -> GuestEnteredButton:
  btn = object.__new__(GuestEnteredButton)
  btn._coordinator = MagicMock()
  btn._coordinator.data = _data(arrived=arrived)
  btn._coordinator.async_set_arrived = AsyncMock()
  return btn


async def test_entered_button_sets_arrived_when_not_yet_arrived():
  btn = _entered_button(arrived=False)
  await btn.async_press()
  btn._coordinator.async_set_arrived.assert_awaited_once_with(True)


async def test_entered_button_does_not_re_set_arrived_when_already_arrived():
  btn = _entered_button(arrived=True)
  await btn.async_press()
  btn._coordinator.async_set_arrived.assert_not_awaited()


# ---------------------------------------------------------------------------
# Coordinator: async_set_arrived / async_set_departed
# ---------------------------------------------------------------------------

@pytest.fixture
async def coord(hass: HomeAssistant):
  entry = _make_entry(hass, {CONF_SYNC_MODE: SYNC_MODE_MANUAL})
  c = RoomCalCoordinator(hass, entry)
  await c.async_setup()
  await c.async_refresh()
  return c


async def test_set_arrived_sets_flag(coord: RoomCalCoordinator):
  await coord.async_set_arrived(True)
  assert coord._active_arrived is True
  assert coord.data.active_arrived is True


async def test_set_arrived_persists_to_store(coord: RoomCalCoordinator):
  await coord.async_set_arrived(True)
  assert coord.store.get_arrived() is True


async def test_set_departed_sets_flag(coord: RoomCalCoordinator):
  await coord.async_set_departed(True)
  assert coord._active_departed is True
  assert coord.data.active_departed is True


async def test_set_departed_persists_to_store(coord: RoomCalCoordinator):
  await coord.async_set_departed(True)
  assert coord.store.get_departed() is True


async def test_flags_load_from_store_on_startup(hass: HomeAssistant):
  entry = _make_entry(hass, {CONF_SYNC_MODE: SYNC_MODE_MANUAL})
  c = RoomCalCoordinator(hass, entry)
  await c.async_setup()
  await c.store.async_set_arrived(True)
  await c.store.async_set_departed(True)

  c2 = RoomCalCoordinator(hass, entry)
  await c2.async_setup()
  assert c2._active_arrived is True
  assert c2._active_departed is True


# ---------------------------------------------------------------------------
# Coordinator: flag reset on reservation identity change
# ---------------------------------------------------------------------------

async def test_flags_reset_when_reservation_changes(hass: HomeAssistant):
  entry = _make_entry(hass, {CONF_SYNC_MODE: SYNC_MODE_CALDAV, "caldav_url": "https://x", "calendar_name": "R"})
  c = RoomCalCoordinator(hass, entry)
  await c.async_setup()

  # Load Alice as current
  with patch("custom_components.room_cal_ha.coordinator.CalDavBackend") as M:
    M.return_value.async_fetch = AsyncMock(return_value=(_ALICE, None))
    await c.async_refresh()

  await c.async_set_arrived(True)
  assert c._active_arrived is True

  # Bob becomes current — different check-in identity
  with patch("custom_components.room_cal_ha.coordinator.CalDavBackend") as M:
    M.return_value.async_fetch = AsyncMock(return_value=(_BOB, None))
    await c.async_refresh()

  assert c._active_arrived is False
  assert c.data.active_arrived is False
  assert c.store.get_arrived() is False


async def test_flags_not_reset_when_same_reservation(hass: HomeAssistant):
  entry = _make_entry(hass, {CONF_SYNC_MODE: SYNC_MODE_CALDAV, "caldav_url": "https://x", "calendar_name": "R"})
  c = RoomCalCoordinator(hass, entry)
  await c.async_setup()

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

  await c.async_set_arrived(True)

  # Same Alice again — no identity change
  with patch("custom_components.room_cal_ha.coordinator.CalDavBackend") as M:
    M.return_value.async_fetch = AsyncMock(return_value=(_ALICE, None))
    await c.async_refresh()

  assert c._active_arrived is True
  assert c.data.active_arrived is True


async def test_flags_reset_on_promote_from_next(coord: RoomCalCoordinator):
  await coord.store.async_set(STORE_CURRENT, _ALICE)
  await coord.store.async_set(STORE_NEXT, _BOB)
  await coord.async_refresh()
  await coord.async_set_arrived(True)

  await coord.async_promote_next_to_active()

  assert coord._active_arrived is False
  assert coord.data.active_arrived is False


async def test_flags_reset_on_clear_current(coord: RoomCalCoordinator):
  await coord.store.async_set(STORE_CURRENT, _ALICE)
  await coord.async_refresh()
  await coord.async_set_arrived(True)

  await coord.async_clear_active()

  assert coord._active_arrived is False
  assert coord.data.active_arrived is False


async def test_flags_reset_on_checkout(coord: RoomCalCoordinator):
  await coord.store.async_set(STORE_CURRENT, _ALICE)
  await coord.async_refresh()
  await coord.async_set_arrived(True)

  await coord._async_do_check_out()

  assert coord._active_arrived is False
  assert coord.data.active_arrived is False