"""Unit tests for ForceRefreshButton, OverrideNextButton, and OverrideEmptyButton.

Uses object.__new__ to bypass HA entity setup — valid because async_press
only calls coordinator methods, not HA lifecycle hooks.
"""
from datetime import date, time, datetime, timezone
from unittest.mock import AsyncMock, MagicMock, patch

import pytest

from custom_components.room_cal_ha.button import (
  ForceRefreshButton,
  OverrideEmptyButton,
  OverrideNextButton,
)
from custom_components.room_cal_ha.const import STORE_NEXT
from custom_components.room_cal_ha.models import OverrideData, ReservationData


def _button(cls):
  btn = object.__new__(cls)
  btn._coordinator = MagicMock()
  btn._coordinator.async_refresh = AsyncMock()
  btn._coordinator.async_promote_next_to_active = AsyncMock()
  btn._coordinator.async_clear_active = AsyncMock()
  return btn


async def test_force_refresh_calls_coordinator_refresh():
  btn = _button(ForceRefreshButton)
  await btn.async_press()
  btn._coordinator.async_refresh.assert_awaited_once()


async def test_force_refresh_does_not_call_promote():
  btn = _button(ForceRefreshButton)
  await btn.async_press()
  btn._coordinator.async_promote_next_to_active.assert_not_called()


# ---------------------------------------------------------------------------
# OverrideNextButton
# ---------------------------------------------------------------------------

_NEXT = ReservationData(
  guest_name="Bob",
  check_in_date=date(2026, 7, 10),
  check_in_time=time(15, 0),
  check_out_date=date(2026, 7, 14),
  check_out_time=time(11, 0),
)

_FROZEN_NOW = datetime(2026, 6, 22, 14, 0, 0, tzinfo=timezone.utc)


def _override_next_button(next_data=_NEXT):
  btn = object.__new__(OverrideNextButton)
  btn.coordinator = MagicMock()
  btn.coordinator.store = MagicMock()
  btn.coordinator.store.get.return_value = next_data
  btn.coordinator.async_start_override = AsyncMock()
  return btn


async def test_override_next_calls_start_override():
  btn = _override_next_button()
  with patch("custom_components.room_cal_ha.button.dt_util.now", return_value=_FROZEN_NOW):
    await btn.async_press()
  btn.coordinator.async_start_override.assert_awaited_once()


async def test_override_next_passes_override_data():
  btn = _override_next_button()
  with patch("custom_components.room_cal_ha.button.dt_util.now", return_value=_FROZEN_NOW):
    await btn.async_press()
  arg = btn.coordinator.async_start_override.call_args[0][0]
  assert isinstance(arg, OverrideData)


async def test_override_next_sets_check_in_to_one_hour_ago():
  btn = _override_next_button()
  with patch("custom_components.room_cal_ha.button.dt_util.now", return_value=_FROZEN_NOW):
    await btn.async_press()
  override: OverrideData = btn.coordinator.async_start_override.call_args[0][0]
  # now() naive = 2026-06-22 14:00 UTC; minus 1h = 13:00
  assert override.active.check_in_date == date(2026, 6, 22)
  assert override.active.check_in_time == time(13, 0)


async def test_override_next_preserves_other_fields():
  btn = _override_next_button()
  with patch("custom_components.room_cal_ha.button.dt_util.now", return_value=_FROZEN_NOW):
    await btn.async_press()
  override: OverrideData = btn.coordinator.async_start_override.call_args[0][0]
  assert override.active.guest_name == "Bob"
  assert override.active.check_out_date == date(2026, 7, 14)
  assert override.active.check_out_time == time(11, 0)


async def test_override_next_end_at_matches_its_own_checkout():
  btn = _override_next_button()
  with patch("custom_components.room_cal_ha.button.dt_util.now", return_value=_FROZEN_NOW):
    await btn.async_press()
  kwargs = btn.coordinator.async_start_override.call_args[1]
  assert kwargs["end_at"] == datetime(2026, 7, 14, 11, 0, 0)


async def test_override_next_no_end_at_when_no_checkout():
  btn = _override_next_button(next_data=ReservationData(guest_name="Bob", check_in_date=date(2026, 7, 10), check_in_time=time(15, 0)))
  with patch("custom_components.room_cal_ha.button.dt_util.now", return_value=_FROZEN_NOW):
    await btn.async_press()
  kwargs = btn.coordinator.async_start_override.call_args[1]
  assert kwargs["end_at"] is None


async def test_override_next_reads_from_store():
  btn = _override_next_button()
  with patch("custom_components.room_cal_ha.button.dt_util.now", return_value=_FROZEN_NOW):
    await btn.async_press()
  btn.coordinator.store.get.assert_called_with(STORE_NEXT)


async def test_override_next_no_next_data_does_nothing():
  btn = _override_next_button(next_data=None)
  with patch("custom_components.room_cal_ha.button.dt_util.now", return_value=_FROZEN_NOW):
    await btn.async_press()
  btn.coordinator.async_start_override.assert_not_awaited()


# ---------------------------------------------------------------------------
# OverrideEmptyButton
# ---------------------------------------------------------------------------

_OUTGOING = 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),
)


def _override_empty_button(active=_OUTGOING):
  btn = object.__new__(OverrideEmptyButton)
  btn.coordinator = MagicMock()
  btn.coordinator.data = MagicMock(active=active) if active is not None else None
  btn.coordinator.async_start_override = AsyncMock()
  return btn


async def test_override_empty_calls_start_override():
  btn = _override_empty_button()
  await btn.async_press()
  btn.coordinator.async_start_override.assert_awaited_once()


async def test_override_empty_passes_empty_reservation_data():
  btn = _override_empty_button()
  await btn.async_press()
  override: OverrideData = btn.coordinator.async_start_override.call_args[0][0]
  assert isinstance(override, OverrideData)
  assert override.active == ReservationData()


async def test_override_empty_end_at_matches_outgoing_checkout():
  btn = _override_empty_button()
  await btn.async_press()
  kwargs = btn.coordinator.async_start_override.call_args[1]
  assert kwargs["end_at"] == datetime(2026, 7, 5, 12, 0, 0)


async def test_override_empty_no_end_at_when_outgoing_has_no_checkout():
  btn = _override_empty_button(active=ReservationData(guest_name="Alice"))
  await btn.async_press()
  kwargs = btn.coordinator.async_start_override.call_args[1]
  assert kwargs["end_at"] is None


async def test_override_empty_no_end_at_when_no_active_data():
  btn = _override_empty_button(active=None)
  btn.coordinator.data = None
  await btn.async_press()
  kwargs = btn.coordinator.async_start_override.call_args[1]
  assert kwargs["end_at"] is None