"""Test the Teslemetry init."""

from copy import deepcopy
import time
from unittest.mock import AsyncMock, MagicMock, patch

from aiohttp import ClientResponseError
from freezegun.api import FrozenDateTimeFactory
import pytest
from syrupy.assertion import SnapshotAssertion
from tesla_fleet_api.exceptions import (
    InvalidResponse,
    InvalidToken,
    RateLimited,
    SubscriptionRequired,
    TeslaFleetError,
)

from homeassistant.components.teslemetry.const import CLIENT_ID, DOMAIN

# Coordinator constants
from homeassistant.components.teslemetry.coordinator import (
    ENERGY_HISTORY_INTERVAL,
    ENERGY_LIVE_INTERVAL,
    VEHICLE_INTERVAL,
)
from homeassistant.components.teslemetry.models import TeslemetryData
from homeassistant.config_entries import ConfigEntryState
from homeassistant.const import (
    STATE_OFF,
    STATE_ON,
    STATE_UNAVAILABLE,
    STATE_UNKNOWN,
    Platform,
)
from homeassistant.core import HomeAssistant
from homeassistant.helpers import device_registry as dr

from . import setup_platform
from .const import (
    CONFIG_V1,
    ENERGY_HISTORY,
    LIVE_STATUS,
    PRODUCTS_MODERN,
    UNIQUE_ID,
    VEHICLE_DATA_ALT,
)

from tests.common import MockConfigEntry, async_fire_time_changed

ERRORS = [
    (InvalidToken, ConfigEntryState.SETUP_ERROR),
    (SubscriptionRequired, ConfigEntryState.SETUP_ERROR),
    (TeslaFleetError, ConfigEntryState.SETUP_RETRY),
]


async def test_load_unload(hass: HomeAssistant) -> None:
    """Test load and unload."""

    entry = await setup_platform(hass)
    assert entry.state is ConfigEntryState.LOADED
    assert isinstance(entry.runtime_data, TeslemetryData)
    assert await hass.config_entries.async_unload(entry.entry_id)
    await hass.async_block_till_done()
    assert entry.state is ConfigEntryState.NOT_LOADED
    assert not hasattr(entry, "runtime_data")


@pytest.mark.parametrize(("side_effect", "state"), ERRORS)
async def test_init_error(
    hass: HomeAssistant,
    mock_products: AsyncMock,
    side_effect: TeslaFleetError,
    state: ConfigEntryState,
) -> None:
    """Test init with errors."""

    mock_products.side_effect = side_effect
    entry = await setup_platform(hass)
    assert entry.state is state


# Test devices
async def test_devices(
    hass: HomeAssistant, device_registry: dr.DeviceRegistry, snapshot: SnapshotAssertion
) -> None:
    """Test device registry."""
    entry = await setup_platform(hass)
    devices = dr.async_entries_for_config_entry(device_registry, entry.entry_id)

    for device in devices:
        assert device == snapshot(name=f"{device.identifiers}")


@pytest.mark.parametrize(("side_effect", "state"), ERRORS)
async def test_vehicle_refresh_error(
    hass: HomeAssistant,
    mock_vehicle_data: AsyncMock,
    side_effect: TeslaFleetError,
    state: ConfigEntryState,
    mock_legacy: AsyncMock,
) -> None:
    """Test coordinator refresh with an error."""
    mock_vehicle_data.side_effect = side_effect
    entry = await setup_platform(hass)
    assert entry.state is state


# Test Energy Live Coordinator
@pytest.mark.parametrize(("side_effect", "state"), ERRORS)
async def test_energy_live_refresh_error(
    hass: HomeAssistant,
    mock_live_status: AsyncMock,
    side_effect: TeslaFleetError,
    state: ConfigEntryState,
) -> None:
    """Test coordinator refresh with an error."""
    mock_live_status.side_effect = side_effect
    entry = await setup_platform(hass)
    assert entry.state is state


# Test Energy Site Coordinator
@pytest.mark.parametrize(("side_effect", "state"), ERRORS)
async def test_energy_site_refresh_error(
    hass: HomeAssistant,
    mock_site_info: AsyncMock,
    side_effect: TeslaFleetError,
    state: ConfigEntryState,
) -> None:
    """Test coordinator refresh with an error."""
    mock_site_info.side_effect = side_effect
    entry = await setup_platform(hass)
    assert entry.state is state


@pytest.mark.usefixtures("entity_registry_enabled_by_default")
async def test_vehicle_stream(
    hass: HomeAssistant,
    mock_add_listener: AsyncMock,
    snapshot: SnapshotAssertion,
) -> None:
    """Test vehicle stream events."""

    await setup_platform(hass, [Platform.BINARY_SENSOR])
    mock_add_listener.assert_called()

    state = hass.states.get("binary_sensor.test_status")
    assert state is not None
    assert state.state == STATE_UNKNOWN

    state = hass.states.get("binary_sensor.test_user_present")
    assert state is not None
    assert state.state == STATE_UNAVAILABLE

    mock_add_listener.send(
        {
            "vin": VEHICLE_DATA_ALT["response"]["vin"],
            "vehicle_data": VEHICLE_DATA_ALT["response"],
            "state": "online",
            "createdAt": "2024-10-04T10:45:17.537Z",
        }
    )
    await hass.async_block_till_done()

    state = hass.states.get("binary_sensor.test_status")
    assert state is not None
    assert state.state == STATE_ON

    state = hass.states.get("binary_sensor.test_user_present")
    assert state is not None
    assert state.state == STATE_ON

    mock_add_listener.send(
        {
            "vin": VEHICLE_DATA_ALT["response"]["vin"],
            "state": "offline",
            "createdAt": "2024-10-04T10:45:17.537Z",
        }
    )
    await hass.async_block_till_done()

    state = hass.states.get("binary_sensor.test_status")
    assert state is not None
    assert state.state == STATE_OFF


async def test_no_live_status(
    hass: HomeAssistant,
    mock_live_status: AsyncMock,
) -> None:
    """Test coordinator refresh with an error."""
    mock_live_status.side_effect = AsyncMock({"response": ""})
    await setup_platform(hass)

    assert hass.states.get("sensor.energy_site_grid_power") is None


async def test_modern_no_poll(
    hass: HomeAssistant,
    mock_vehicle_data: AsyncMock,
    mock_products: AsyncMock,
    freezer: FrozenDateTimeFactory,
) -> None:
    """Test that modern vehicles do not poll vehicle_data."""

    mock_products.return_value = PRODUCTS_MODERN
    entry = await setup_platform(hass)
    assert entry.state is ConfigEntryState.LOADED
    assert mock_vehicle_data.called is False
    freezer.tick(VEHICLE_INTERVAL)
    assert mock_vehicle_data.called is False
    freezer.tick(VEHICLE_INTERVAL)
    assert mock_vehicle_data.called is False


async def test_stale_device_removal(
    hass: HomeAssistant,
    device_registry: dr.DeviceRegistry,
    mock_products: AsyncMock,
) -> None:
    """Test removal of stale devices."""

    # Setup the entry first to get a valid config_entry_id
    entry = await setup_platform(hass)

    # Create a device that should be removed (with the valid entry_id)
    device_registry.async_get_or_create(
        config_entry_id=entry.entry_id,
        identifiers={(DOMAIN, "stale-vin")},
        manufacturer="Tesla",
        name="Stale Vehicle",
    )

    # Verify the stale device exists
    pre_devices = dr.async_entries_for_config_entry(device_registry, entry.entry_id)
    stale_identifiers = {
        identifier for device in pre_devices for identifier in device.identifiers
    }
    assert (DOMAIN, "stale-vin") in stale_identifiers

    # Update products with an empty response (no devices) and reload entry
    with patch(
        "tesla_fleet_api.teslemetry.Teslemetry.products",
        return_value={"response": []},
    ):
        await hass.config_entries.async_reload(entry.entry_id)
        await hass.async_block_till_done()

        # Get updated devices after reload
        post_devices = dr.async_entries_for_config_entry(
            device_registry, entry.entry_id
        )
        post_identifiers = {
            identifier for device in post_devices for identifier in device.identifiers
        }

        # Verify the stale device has been removed
        assert (DOMAIN, "stale-vin") not in post_identifiers

        # Verify the device itself has been completely removed from the registry
        # since it had no other config entries
        updated_device = device_registry.async_get_device(
            identifiers={(DOMAIN, "stale-vin")}
        )
        assert updated_device is None


async def test_device_retention_during_reload(
    hass: HomeAssistant,
    device_registry: dr.DeviceRegistry,
    mock_products: AsyncMock,
) -> None:
    """Test that valid devices are retained during a config entry reload."""
    # Setup entry with normal devices
    entry = await setup_platform(hass)

    # Get initial device count and identifiers
    pre_devices = dr.async_entries_for_config_entry(device_registry, entry.entry_id)
    pre_count = len(pre_devices)
    pre_identifiers = {
        identifier for device in pre_devices for identifier in device.identifiers
    }

    # Make sure we have some devices
    assert pre_count > 0

    # Save the original identifiers to compare after reload
    original_identifiers = pre_identifiers.copy()

    # Reload the config entry with the same products data
    # The mock_products fixture will return the same data as during setup
    await hass.config_entries.async_reload(entry.entry_id)
    await hass.async_block_till_done()

    # Verify device count and identifiers after reload match pre-reload
    post_devices = dr.async_entries_for_config_entry(device_registry, entry.entry_id)
    post_count = len(post_devices)
    post_identifiers = {
        identifier for device in post_devices for identifier in device.identifiers
    }

    # Since the products data didn't change, we should have the same devices
    assert post_count == pre_count
    assert post_identifiers == original_identifiers


async def test_migrate_from_version_1_success(hass: HomeAssistant) -> None:
    """Test successful config migration from version 1."""
    mock_entry = MockConfigEntry(
        domain=DOMAIN,
        version=1,
        unique_id=UNIQUE_ID,
        data=CONFIG_V1,
    )

    # Mock the migrate token endpoint response
    with patch(
        "homeassistant.components.teslemetry.Teslemetry.migrate_to_oauth",
        new_callable=AsyncMock,
    ) as mock_migrate:
        mock_migrate.return_value = {
            "token": {
                "access_token": "migrated_token",
                "token_type": "Bearer",
                "refresh_token": "migrated_refresh_token",
                "expires_in": 3600,
                "expires_at": time.time() + 3600,
            }
        }

        mock_entry.add_to_hass(hass)
        await hass.config_entries.async_setup(mock_entry.entry_id)
        await hass.async_block_till_done()

        mock_migrate.assert_called_once_with(CLIENT_ID, hass.config.location_name)

    assert mock_entry is not None
    assert mock_entry.version == 2
    # Verify data was converted to OAuth format
    assert "token" in mock_entry.data
    assert mock_entry.data["token"]["access_token"] == "migrated_token"
    assert mock_entry.data["token"]["refresh_token"] == "migrated_refresh_token"
    # Verify auth_implementation was added for OAuth2 flow compatibility
    assert mock_entry.data["auth_implementation"] == DOMAIN
    assert mock_entry.state is ConfigEntryState.LOADED


async def test_migrate_from_version_1_token_endpoint_error(hass: HomeAssistant) -> None:
    """Test config migration handles token endpoint errors."""
    mock_entry = MockConfigEntry(
        domain=DOMAIN,
        version=1,
        unique_id=UNIQUE_ID,
        data=CONFIG_V1,
    )

    # Mock the migrate token endpoint to raise an HTTP error
    with patch(
        "homeassistant.components.teslemetry.Teslemetry.migrate_to_oauth",
        new_callable=AsyncMock,
    ) as mock_migrate:
        mock_migrate.side_effect = ClientResponseError(
            request_info=MagicMock(), history=(), status=400
        )

        mock_entry.add_to_hass(hass)
        await hass.config_entries.async_setup(mock_entry.entry_id)
        await hass.async_block_till_done()

        mock_migrate.assert_called_once_with(CLIENT_ID, hass.config.location_name)

    entry = hass.config_entries.async_get_entry(mock_entry.entry_id)
    assert entry is not None
    assert entry.state is ConfigEntryState.MIGRATION_ERROR
    assert entry.version == 1  # Version should remain unchanged on migration failure


async def test_migrate_version_2_no_migration_needed(hass: HomeAssistant) -> None:
    """Test that version 2 entries don't need migration."""
    oauth_config = {
        "auth_implementation": DOMAIN,
        "token": {
            "access_token": "existing_oauth_token",
            "token_type": "Bearer",
            "refresh_token": "existing_refresh_token",
            "expires_in": 3600,
            "expires_at": 1234567890,
        },
    }

    mock_entry = MockConfigEntry(
        domain=DOMAIN,
        version=2,  # Already current version
        unique_id=UNIQUE_ID,
        data=oauth_config,
    )

    # Should not call the migrate endpoint since already version 2
    with patch(
        "homeassistant.components.teslemetry.Teslemetry.migrate_to_oauth",
        new_callable=AsyncMock,
    ) as mock_migrate:
        mock_entry.add_to_hass(hass)
        await hass.config_entries.async_setup(mock_entry.entry_id)
        await hass.async_block_till_done()

        # Migration should not be called
        mock_migrate.assert_not_called()

    entry = hass.config_entries.async_get_entry(mock_entry.entry_id)
    assert entry is not None
    assert entry.version == 2
    # Verify data was not modified
    assert entry.data == oauth_config
    assert entry.state is ConfigEntryState.LOADED


async def test_migrate_from_future_version_fails(hass: HomeAssistant) -> None:
    """Test migration fails for future versions."""
    mock_entry = MockConfigEntry(
        domain=DOMAIN,
        version=3,  # Future version
        unique_id=UNIQUE_ID,
        data={
            "token": {
                "access_token": "future_token",
                "token_type": "Bearer",
                "refresh_token": "future_refresh_token",
                "expires_in": 3600,
            }
        },
    )

    mock_entry.add_to_hass(hass)
    await hass.config_entries.async_setup(mock_entry.entry_id)
    await hass.async_block_till_done()

    entry = hass.config_entries.async_get_entry(mock_entry.entry_id)
    assert entry is not None
    assert entry.state is ConfigEntryState.MIGRATION_ERROR
    assert entry.version == 3  # Version should remain unchanged


async def test_oauth_implementation_not_available(hass: HomeAssistant) -> None:
    """Test that missing OAuth implementation triggers reauth."""
    mock_entry = MockConfigEntry(
        domain=DOMAIN,
        version=2,
        unique_id=UNIQUE_ID,
        data={
            "auth_implementation": DOMAIN,
            "token": {
                "access_token": "test_access_token",
                "refresh_token": "test_refresh_token",
                "expires_at": int(time.time()) + 3600,
            },
        },
    )
    mock_entry.add_to_hass(hass)

    # Mock the implementation lookup to raise ValueError
    with patch(
        "homeassistant.components.teslemetry.async_get_config_entry_implementation",
        side_effect=ValueError("Implementation not available"),
    ):
        await hass.config_entries.async_setup(mock_entry.entry_id)
        await hass.async_block_till_done()

    entry = hass.config_entries.async_get_entry(mock_entry.entry_id)
    assert entry is not None
    # Should trigger reauth, not just fail silently
    assert entry.state is ConfigEntryState.SETUP_ERROR


RETRY_EXCEPTIONS = [
    (RateLimited(data={"after": 5}), 5.0),
    (InvalidResponse(), 10.0),
]


@pytest.mark.parametrize(("exception", "expected_retry_after"), RETRY_EXCEPTIONS)
async def test_site_info_retry_exceptions(
    hass: HomeAssistant,
    mock_site_info: AsyncMock,
    exception: TeslaFleetError,
    expected_retry_after: float,
) -> None:
    """Test UpdateFailed with retry_after for site info coordinator."""
    mock_site_info.side_effect = exception
    entry = await setup_platform(hass)
    # Retry exceptions during first refresh cause setup retry
    assert entry.state is ConfigEntryState.SETUP_RETRY
    # API should only be called once (no manual retries)
    assert mock_site_info.call_count == 1


@pytest.mark.parametrize(("exception", "expected_retry_after"), RETRY_EXCEPTIONS)
async def test_vehicle_data_retry_exceptions(
    hass: HomeAssistant,
    mock_vehicle_data: AsyncMock,
    mock_legacy: AsyncMock,
    exception: TeslaFleetError,
    expected_retry_after: float,
) -> None:
    """Test UpdateFailed with retry_after for vehicle data coordinator."""
    mock_vehicle_data.side_effect = exception
    entry = await setup_platform(hass)
    # Retry exceptions during first refresh cause setup retry
    assert entry.state is ConfigEntryState.SETUP_RETRY
    # API should only be called once (no manual retries)
    assert mock_vehicle_data.call_count == 1


@pytest.mark.parametrize(("exception", "expected_retry_after"), RETRY_EXCEPTIONS)
async def test_live_status_coordinator_retry_exceptions(
    hass: HomeAssistant,
    freezer: FrozenDateTimeFactory,
    mock_live_status: AsyncMock,
    exception: TeslaFleetError,
    expected_retry_after: float,
) -> None:
    """Test live status coordinator raises UpdateFailed with retry_after."""
    call_count = 0

    def live_status_side_effect():
        nonlocal call_count
        call_count += 1
        if call_count == 1:
            return deepcopy(LIVE_STATUS)  # Initial call succeeds
        if call_count == 2:
            raise exception  # Second call raises exception
        return deepcopy(LIVE_STATUS)  # Subsequent calls succeed

    mock_live_status.side_effect = live_status_side_effect

    entry = await setup_platform(hass)
    assert entry.state is ConfigEntryState.LOADED
    assert call_count == 1

    # Trigger coordinator refresh - this will raise the exception
    freezer.tick(ENERGY_LIVE_INTERVAL)
    async_fire_time_changed(hass)
    await hass.async_block_till_done()

    # API was called exactly once for this refresh (no manual retry loop)
    assert call_count == 2
    # Entry stays loaded - UpdateFailed with retry_after doesn't break the entry
    assert entry.state is ConfigEntryState.LOADED


@pytest.mark.parametrize(("exception", "expected_retry_after"), RETRY_EXCEPTIONS)
async def test_energy_history_coordinator_retry_exceptions(
    hass: HomeAssistant,
    freezer: FrozenDateTimeFactory,
    mock_energy_history: AsyncMock,
    exception: TeslaFleetError,
    expected_retry_after: float,
) -> None:
    """Test energy history coordinator raises UpdateFailed with retry_after."""
    call_count = 0

    def energy_history_side_effect(*args, **kwargs):
        nonlocal call_count
        call_count += 1
        if call_count == 1:
            raise exception  # First call raises exception
        return ENERGY_HISTORY  # Subsequent calls succeed

    mock_energy_history.side_effect = energy_history_side_effect

    entry = await setup_platform(hass)
    assert entry.state is ConfigEntryState.LOADED
    # Energy history doesn't have first_refresh during setup
    assert call_count == 0

    # Trigger first coordinator refresh - this will raise the exception
    freezer.tick(ENERGY_HISTORY_INTERVAL)
    async_fire_time_changed(hass)
    await hass.async_block_till_done()

    # API was called exactly once (no manual retry loop)
    assert call_count == 1
    # Entry stays loaded - UpdateFailed with retry_after doesn't break the entry
    assert entry.state is ConfigEntryState.LOADED


async def test_live_status_auth_error(
    hass: HomeAssistant,
    freezer: FrozenDateTimeFactory,
) -> None:
    """Test live status coordinator handles auth errors."""
    call_count = 0

    def live_status_side_effect():
        nonlocal call_count
        call_count += 1
        if call_count == 1:
            return deepcopy(LIVE_STATUS)
        raise InvalidToken

    with patch(
        "tesla_fleet_api.tesla.energysite.EnergySite.live_status",
        side_effect=live_status_side_effect,
    ):
        entry = await setup_platform(hass)
        assert entry.state is ConfigEntryState.LOADED

        # Trigger a coordinator refresh by advancing time
        freezer.tick(ENERGY_LIVE_INTERVAL)
        async_fire_time_changed(hass)
        await hass.async_block_till_done()

        # Auth error triggers reauth flow
        assert entry.state is ConfigEntryState.LOADED


async def test_live_status_generic_error(
    hass: HomeAssistant,
    freezer: FrozenDateTimeFactory,
) -> None:
    """Test live status coordinator handles generic TeslaFleetError."""
    call_count = 0

    def live_status_side_effect():
        nonlocal call_count
        call_count += 1
        if call_count == 1:
            return deepcopy(LIVE_STATUS)
        raise TeslaFleetError

    with patch(
        "tesla_fleet_api.tesla.energysite.EnergySite.live_status",
        side_effect=live_status_side_effect,
    ):
        entry = await setup_platform(hass)
        assert entry.state is ConfigEntryState.LOADED

        # Trigger a coordinator refresh by advancing time
        freezer.tick(ENERGY_LIVE_INTERVAL)
        async_fire_time_changed(hass)
        await hass.async_block_till_done()

        # Entry stays loaded but coordinator will have failed
        assert entry.state is ConfigEntryState.LOADED