"""Test the Sunricher DALI integration initialization."""

from unittest.mock import MagicMock

from PySrDaliGateway.exceptions import DaliGatewayError
from syrupy.assertion import SnapshotAssertion

from homeassistant.components.sunricher_dali.const import DOMAIN
from homeassistant.config_entries import ConfigEntryState
from homeassistant.core import HomeAssistant
from homeassistant.helpers import device_registry as dr

from tests.common import MockConfigEntry


async def test_setup_entry_success(
    hass: HomeAssistant,
    mock_config_entry: MockConfigEntry,
    mock_gateway: MagicMock,
) -> None:
    """Test successful setup of config entry."""
    mock_config_entry.add_to_hass(hass)

    assert await hass.config_entries.async_setup(mock_config_entry.entry_id)
    await hass.async_block_till_done()

    assert mock_config_entry.state is ConfigEntryState.LOADED

    mock_gateway.connect.assert_called_once()


async def test_devices(
    hass: HomeAssistant,
    mock_config_entry: MockConfigEntry,
    mock_gateway: MagicMock,
    device_registry: dr.DeviceRegistry,
    snapshot: SnapshotAssertion,
) -> None:
    """Test that devices are registered correctly."""
    mock_config_entry.add_to_hass(hass)

    assert await hass.config_entries.async_setup(mock_config_entry.entry_id)
    await hass.async_block_till_done()

    devices = dr.async_entries_for_config_entry(
        device_registry, mock_config_entry.entry_id
    )
    assert devices == snapshot


async def test_setup_entry_connection_error(
    hass: HomeAssistant,
    mock_config_entry: MockConfigEntry,
    mock_gateway: MagicMock,
) -> None:
    """Test setup fails when gateway connection fails."""
    mock_config_entry.add_to_hass(hass)
    mock_gateway.connect.side_effect = DaliGatewayError("Connection failed")

    assert not await hass.config_entries.async_setup(mock_config_entry.entry_id)
    await hass.async_block_till_done()

    assert mock_config_entry.state is ConfigEntryState.SETUP_RETRY
    mock_gateway.connect.assert_called_once()


async def test_setup_entry_discovery_error(
    hass: HomeAssistant,
    mock_config_entry: MockConfigEntry,
    mock_gateway: MagicMock,
) -> None:
    """Test setup fails when device discovery fails."""
    mock_config_entry.add_to_hass(hass)
    mock_gateway.discover_devices.side_effect = DaliGatewayError("Discovery failed")

    assert not await hass.config_entries.async_setup(mock_config_entry.entry_id)
    await hass.async_block_till_done()

    assert mock_config_entry.state is ConfigEntryState.SETUP_RETRY
    mock_gateway.connect.assert_called_once()
    mock_gateway.discover_devices.assert_called_once()


async def test_unload_entry(
    hass: HomeAssistant,
    mock_config_entry: MockConfigEntry,
    mock_gateway: MagicMock,
) -> None:
    """Test successful unloading of config entry."""
    mock_config_entry.add_to_hass(hass)

    assert await hass.config_entries.async_setup(mock_config_entry.entry_id)
    await hass.async_block_till_done()

    assert mock_config_entry.state is ConfigEntryState.LOADED

    assert await hass.config_entries.async_unload(mock_config_entry.entry_id)
    await hass.async_block_till_done()

    assert mock_config_entry.state is ConfigEntryState.NOT_LOADED


async def test_remove_stale_devices(
    hass: HomeAssistant,
    mock_config_entry: MockConfigEntry,
    mock_gateway: MagicMock,
    mock_devices: list[MagicMock],
    device_registry: dr.DeviceRegistry,
) -> None:
    """Test stale devices are removed when device list decreases."""
    mock_config_entry.add_to_hass(hass)
    assert await hass.config_entries.async_setup(mock_config_entry.entry_id)
    await hass.async_block_till_done()

    devices_before = dr.async_entries_for_config_entry(
        device_registry, mock_config_entry.entry_id
    )
    initial_count = len(devices_before)

    assert await hass.config_entries.async_unload(mock_config_entry.entry_id)
    await hass.async_block_till_done()

    mock_gateway.discover_devices.return_value = mock_devices[:2]

    assert await hass.config_entries.async_setup(mock_config_entry.entry_id)
    await hass.async_block_till_done()

    devices_after = dr.async_entries_for_config_entry(
        device_registry, mock_config_entry.entry_id
    )
    assert len(devices_after) < initial_count

    gateway_device = device_registry.async_get_device(
        identifiers={(DOMAIN, mock_gateway.gw_sn)}
    )
    assert gateway_device is not None
    assert mock_config_entry.entry_id in gateway_device.config_entries