"""Unit tests for RoomStateSwitch, ModeSyncSwitch, and OverrideReservationSwitch.

Uses object.__new__ to bypass HA entity setup. async_write_ha_state is
replaced with a MagicMock to avoid needing a real HA instance.
"""
from unittest.mock import AsyncMock, MagicMock, patch

import pytest

from custom_components.room_cal_ha.const import CONF_ZLOCK_ENTRIES
from custom_components.room_cal_ha.switch import RoomStateSwitch, ModeSyncSwitch, OverrideReservationSwitch, UseUnifiSwitch, UseZlockSlotsSwitch


def _room_state():
  s = object.__new__(RoomStateSwitch)
  s._state = False
  s._deferred = True
  s._coordinator = MagicMock()
  s.async_write_ha_state = MagicMock()
  return s


def _mode_sync():
  s = object.__new__(ModeSyncSwitch)
  s._state = False
  s._coordinator = MagicMock()
  s._coordinator.cancel_mode_sync = MagicMock()
  s._coordinator.async_reconcile_from_store = AsyncMock()
  s.async_write_ha_state = MagicMock()
  return s


# ---------------------------------------------------------------------------
# RoomStateSwitch — basic state
# ---------------------------------------------------------------------------

async def test_room_state_initial_state_is_false():
  s = _room_state()
  assert s.is_on is False


async def test_room_state_turn_on_sets_state():
  s = _room_state()
  s._deferred = False
  await s.async_turn_on()
  assert s.is_on is True


async def test_room_state_turn_off_sets_state():
  s = _room_state()
  s._state = True
  s._deferred = False
  await s.async_turn_off()
  assert s.is_on is False


# ---------------------------------------------------------------------------
# RoomStateSwitch — deferred write behavior
# ---------------------------------------------------------------------------

async def test_room_state_deferred_suppresses_write():
  s = _room_state()
  assert s._deferred is True
  s.async_write_ha_state()  # should be a no-op when deferred
  # The real async_write_ha_state is replaced; calling it when deferred returns early.
  # We verify by re-implementing the check:
  with patch.object(type(s).__bases__[0], "async_write_ha_state") as mock_parent:
    s.async_write_ha_state = RoomStateSwitch.async_write_ha_state.__get__(s, type(s))
    s.async_write_ha_state()
    mock_parent.assert_not_called()


def test_room_state_commit_state_unblocks_and_writes():
  s = _room_state()
  s._state = True
  real_write = MagicMock()

  with patch(
    "homeassistant.helpers.entity.Entity.async_write_ha_state",
    real_write,
  ):
    s.commit_state()

  assert s._deferred is False
  real_write.assert_called_once()


# ---------------------------------------------------------------------------
# ModeSyncSwitch — turn off cancels mode sync
# ---------------------------------------------------------------------------

async def test_mode_sync_turn_off_cancels_sync():
  s = _mode_sync()
  s._state = True
  await s.async_turn_off()
  assert s.is_on is False
  s._coordinator.cancel_mode_sync.assert_called_once()


async def test_mode_sync_turn_on_does_not_cancel_sync():
  s = _mode_sync()
  await s.async_turn_on()
  s._coordinator.cancel_mode_sync.assert_not_called()


async def test_mode_sync_turn_on_triggers_reconcile():
  s = _mode_sync()
  await s.async_turn_on()
  assert s.is_on is True
  s._coordinator.async_reconcile_from_store.assert_awaited_once()


async def test_mode_sync_initial_state_is_false():
  s = _mode_sync()
  assert s.is_on is False


# ---------------------------------------------------------------------------
# OverrideReservationSwitch
# ---------------------------------------------------------------------------

def _override_switch(override_active: bool = False):
  s = object.__new__(OverrideReservationSwitch)
  s.coordinator = MagicMock()
  s.coordinator.async_end_override = AsyncMock()
  s.coordinator.async_ensure_override = AsyncMock()
  data = MagicMock()
  data.override_active = override_active
  s.coordinator.data = data
  return s


def test_override_switch_is_off_when_not_active():
  assert _override_switch(override_active=False).is_on is False


def test_override_switch_is_on_when_active():
  assert _override_switch(override_active=True).is_on is True


def test_override_switch_none_data_is_off():
  s = _override_switch()
  s.coordinator.data = None
  assert s.is_on is False


async def test_override_switch_turn_off_ends_override():
  s = _override_switch(override_active=True)
  await s.async_turn_off()
  s.coordinator.async_end_override.assert_awaited_once()


async def test_override_switch_turn_on_snapshots_active():
  s = _override_switch()
  await s.async_turn_on()
  s.coordinator.async_ensure_override.assert_awaited_once()
  s.coordinator.async_end_override.assert_not_awaited()


# ---------------------------------------------------------------------------
# UseUnifiSwitch
# ---------------------------------------------------------------------------

def _use_unifi():
  s = object.__new__(UseUnifiSwitch)
  s._coordinator = MagicMock()
  s.async_write_ha_state = MagicMock()
  return s


def test_use_unifi_default_state_is_true():
  s = _use_unifi()
  assert s.is_on is True


async def test_use_unifi_turn_off_sets_false():
  s = _use_unifi()
  await s.async_turn_off()
  assert s.is_on is False


async def test_use_unifi_turn_on_restores_true():
  s = _use_unifi()
  s._state = False
  await s.async_turn_on()
  assert s.is_on is True


# ---------------------------------------------------------------------------
# UseZlockSlotsSwitch
# ---------------------------------------------------------------------------

def _use_zlock(entries: list | None = None):
  s = object.__new__(UseZlockSlotsSwitch)
  s._coordinator = MagicMock()
  s.async_write_ha_state = MagicMock()
  entry = MagicMock()
  entry.options = {CONF_ZLOCK_ENTRIES: entries} if entries is not None else {}
  s._entry = entry
  return s


def test_use_zlock_default_state_is_false():
  s = _use_zlock()
  assert s.is_on is False


def test_use_zlock_available_false_when_no_entries_configured():
  assert _use_zlock(entries=[]).available is False


def test_use_zlock_available_false_when_options_missing():
  assert _use_zlock().available is False


def test_use_zlock_available_true_when_entries_configured():
  assert _use_zlock(entries=["abc123"]).available is True


async def test_use_zlock_turn_on_sets_true():
  s = _use_zlock(entries=["abc123"])
  await s.async_turn_on()
  assert s.is_on is True


async def test_use_zlock_turn_off_sets_false():
  s = _use_zlock(entries=["abc123"])
  s._state = True
  await s.async_turn_off()
  assert s.is_on is False