"""The tests for the InfluxDB sensor."""
from dataclasses import dataclass
from datetime import timedelta
from typing import Dict, List, Type

from influxdb.exceptions import InfluxDBClientError, InfluxDBServerError
from influxdb_client.rest import ApiException
import pytest
from voluptuous import Invalid

from homeassistant.components.influxdb.const import (
    API_VERSION_2,
    DEFAULT_API_VERSION,
    DEFAULT_BUCKET,
    DEFAULT_DATABASE,
    DOMAIN,
    TEST_QUERY_V1,
    TEST_QUERY_V2,
)
from homeassistant.components.influxdb.sensor import PLATFORM_SCHEMA
import homeassistant.components.sensor as sensor
from homeassistant.const import STATE_UNKNOWN
from homeassistant.helpers.entity_platform import PLATFORM_NOT_READY_BASE_WAIT_TIME
from homeassistant.setup import async_setup_component
from homeassistant.util import dt as dt_util

from tests.async_mock import MagicMock, patch
from tests.common import async_fire_time_changed

INFLUXDB_PATH = "homeassistant.components.influxdb"
INFLUXDB_CLIENT_PATH = f"{INFLUXDB_PATH}.InfluxDBClient"
INFLUXDB_SENSOR_PATH = f"{INFLUXDB_PATH}.sensor"

BASE_V1_CONFIG = {}
BASE_V2_CONFIG = {
    "api_version": API_VERSION_2,
    "organization": "org",
    "token": "token",
}

BASE_V1_QUERY = {
    "queries": [
        {
            "name": "test",
            "measurement": "measurement",
            "where": "where",
            "field": "field",
        }
    ],
}
BASE_V2_QUERY = {"queries_flux": [{"name": "test", "query": "query"}]}


@dataclass
class Record:
    """Record in a Table."""

    values: Dict


@dataclass
class Table:
    """Table in an Influx 2 resultset."""

    records: List[Type[Record]]


@pytest.fixture(name="mock_client")
def mock_client_fixture(request):
    """Patch the InfluxDBClient object with mock for version under test."""
    if request.param == API_VERSION_2:
        client_target = f"{INFLUXDB_CLIENT_PATH}V2"
    else:
        client_target = INFLUXDB_CLIENT_PATH

    with patch(client_target) as client:
        yield client


@pytest.fixture(autouse=True, scope="module")
def mock_client_close():
    """Mock close method of clients at module scope."""
    with patch(f"{INFLUXDB_CLIENT_PATH}.close") as close_v1, patch(
        f"{INFLUXDB_CLIENT_PATH}V2.close"
    ) as close_v2:
        yield (close_v1, close_v2)


def _make_v1_resultset(*args):
    """Create a mock V1 resultset."""
    for arg in args:
        yield {"value": arg}


def _make_v1_databases_resultset():
    """Create a mock V1 'show databases' resultset."""
    for name in [DEFAULT_DATABASE, "db2"]:
        yield {"name": name}


def _make_v2_resultset(*args):
    """Create a mock V2 resultset."""
    tables = []

    for arg in args:
        values = {"_value": arg}
        record = Record(values)
        tables.append(Table([record]))

    return tables


def _make_v2_buckets_resultset():
    """Create a mock V2 'buckets()' resultset."""
    records = []
    for name in [DEFAULT_BUCKET, "bucket2"]:
        records.append(Record({"name": name}))

    return [Table(records)]


def _set_query_mock_v1(
    mock_influx_client, return_value=None, query_exception=None, side_effect=None
):
    """Set return value or side effect for the V1 client."""
    query_api = mock_influx_client.return_value.query
    if side_effect:
        query_api.side_effect = side_effect

    else:
        if return_value is None:
            return_value = []

        def get_return_value(query, **kwargs):
            """Return mock for test query, return value otherwise."""
            if query == TEST_QUERY_V1:
                points = _make_v1_databases_resultset()
            else:
                if query_exception:
                    raise query_exception
                points = return_value

            query_output = MagicMock()
            query_output.get_points.return_value = points
            return query_output

        query_api.side_effect = get_return_value

    return query_api


def _set_query_mock_v2(
    mock_influx_client, return_value=None, query_exception=None, side_effect=None
):
    """Set return value or side effect for the V2 client."""
    query_api = mock_influx_client.return_value.query_api.return_value.query
    if side_effect:
        query_api.side_effect = side_effect
    else:
        if return_value is None:
            return_value = []

        def get_return_value(query):
            """Return buckets list for test query, return value otherwise."""
            if query == TEST_QUERY_V2:
                return _make_v2_buckets_resultset()

            if query_exception:
                raise query_exception

            return return_value

        query_api.side_effect = get_return_value

    return query_api


async def _setup(hass, config_ext, queries, expected_sensors):
    """Create client and test expected sensors."""
    config = {
        DOMAIN: config_ext,
        sensor.DOMAIN: {"platform": DOMAIN},
    }
    influx_config = config[sensor.DOMAIN]
    influx_config.update(config_ext)
    influx_config.update(queries)

    assert await async_setup_component(hass, sensor.DOMAIN, config)
    await hass.async_block_till_done()

    sensors = []
    for expected_sensor in expected_sensors:
        state = hass.states.get(expected_sensor)
        assert state is not None
        sensors.append(state)

    return sensors


@pytest.mark.parametrize(
    "mock_client, config_ext, queries, set_query_mock",
    [
        (DEFAULT_API_VERSION, BASE_V1_CONFIG, BASE_V1_QUERY, _set_query_mock_v1),
        (API_VERSION_2, BASE_V2_CONFIG, BASE_V2_QUERY, _set_query_mock_v2),
    ],
    indirect=["mock_client"],
)
async def test_minimal_config(hass, mock_client, config_ext, queries, set_query_mock):
    """Test the minimal config and defaults."""
    set_query_mock(mock_client)
    await _setup(hass, config_ext, queries, ["sensor.test"])


@pytest.mark.parametrize(
    "mock_client, config_ext, queries, set_query_mock",
    [
        (
            DEFAULT_API_VERSION,
            {
                "ssl": "true",
                "host": "host",
                "port": "9000",
                "path": "path",
                "username": "user",
                "password": "pass",
                "database": "db",
                "verify_ssl": "true",
            },
            {
                "queries": [
                    {
                        "name": "test",
                        "unit_of_measurement": "unit",
                        "measurement": "measurement",
                        "where": "where",
                        "value_template": "value",
                        "database": "db2",
                        "group_function": "fn",
                        "field": "field",
                    }
                ],
            },
            _set_query_mock_v1,
        ),
        (
            API_VERSION_2,
            {
                "api_version": "2",
                "ssl": "true",
                "host": "host",
                "port": "9000",
                "path": "path",
                "token": "token",
                "organization": "org",
                "bucket": "bucket",
            },
            {
                "queries_flux": [
                    {
                        "name": "test",
                        "unit_of_measurement": "unit",
                        "range_start": "start",
                        "range_stop": "end",
                        "group_function": "fn",
                        "bucket": "bucket2",
                        "imports": "import",
                        "query": "query",
                    }
                ],
            },
            _set_query_mock_v2,
        ),
    ],
    indirect=["mock_client"],
)
async def test_full_config(hass, mock_client, config_ext, queries, set_query_mock):
    """Test the full config."""
    set_query_mock(mock_client)
    await _setup(hass, config_ext, queries, ["sensor.test"])


@pytest.mark.parametrize("config_ext", [(BASE_V1_CONFIG), (BASE_V2_CONFIG)])
async def test_config_failure(hass, config_ext):
    """Test an invalid config."""
    config = {"platform": DOMAIN}
    config.update(config_ext)

    with pytest.raises(Invalid):
        PLATFORM_SCHEMA(config)


@pytest.mark.parametrize(
    "mock_client, config_ext, queries, set_query_mock, make_resultset",
    [
        (
            DEFAULT_API_VERSION,
            BASE_V1_CONFIG,
            BASE_V1_QUERY,
            _set_query_mock_v1,
            _make_v1_resultset,
        ),
        (
            API_VERSION_2,
            BASE_V2_CONFIG,
            BASE_V2_QUERY,
            _set_query_mock_v2,
            _make_v2_resultset,
        ),
    ],
    indirect=["mock_client"],
)
async def test_state_matches_query_result(
    hass, mock_client, config_ext, queries, set_query_mock, make_resultset
):
    """Test state of sensor matches respone from query api."""
    set_query_mock(mock_client, return_value=make_resultset(42))

    sensors = await _setup(hass, config_ext, queries, ["sensor.test"])

    assert sensors[0].state == "42"


@pytest.mark.parametrize(
    "mock_client, config_ext, queries, set_query_mock, make_resultset",
    [
        (
            DEFAULT_API_VERSION,
            BASE_V1_CONFIG,
            BASE_V1_QUERY,
            _set_query_mock_v1,
            _make_v1_resultset,
        ),
        (
            API_VERSION_2,
            BASE_V2_CONFIG,
            BASE_V2_QUERY,
            _set_query_mock_v2,
            _make_v2_resultset,
        ),
    ],
    indirect=["mock_client"],
)
async def test_state_matches_first_query_result_for_multiple_return(
    hass, caplog, mock_client, config_ext, queries, set_query_mock, make_resultset
):
    """Test state of sensor matches respone from query api."""
    set_query_mock(mock_client, return_value=make_resultset(42, "not used"))

    sensors = await _setup(hass, config_ext, queries, ["sensor.test"])
    assert sensors[0].state == "42"
    assert (
        len([record for record in caplog.records if record.levelname == "WARNING"]) == 1
    )


@pytest.mark.parametrize(
    "mock_client, config_ext, queries, set_query_mock",
    [
        (DEFAULT_API_VERSION, BASE_V1_CONFIG, BASE_V1_QUERY, _set_query_mock_v1,),
        (API_VERSION_2, BASE_V2_CONFIG, BASE_V2_QUERY, _set_query_mock_v2),
    ],
    indirect=["mock_client"],
)
async def test_state_for_no_results(
    hass, caplog, mock_client, config_ext, queries, set_query_mock
):
    """Test state of sensor matches respone from query api."""
    set_query_mock(mock_client)

    sensors = await _setup(hass, config_ext, queries, ["sensor.test"])
    assert sensors[0].state == STATE_UNKNOWN
    assert (
        len([record for record in caplog.records if record.levelname == "WARNING"]) == 1
    )


@pytest.mark.parametrize(
    "mock_client, config_ext, queries, set_query_mock, query_exception",
    [
        (
            DEFAULT_API_VERSION,
            BASE_V1_CONFIG,
            BASE_V1_QUERY,
            _set_query_mock_v1,
            OSError("fail"),
        ),
        (
            DEFAULT_API_VERSION,
            BASE_V1_CONFIG,
            BASE_V1_QUERY,
            _set_query_mock_v1,
            InfluxDBClientError("fail"),
        ),
        (
            DEFAULT_API_VERSION,
            BASE_V1_CONFIG,
            BASE_V1_QUERY,
            _set_query_mock_v1,
            InfluxDBClientError("fail", code=400),
        ),
        (
            API_VERSION_2,
            BASE_V2_CONFIG,
            BASE_V2_QUERY,
            _set_query_mock_v2,
            OSError("fail"),
        ),
        (
            API_VERSION_2,
            BASE_V2_CONFIG,
            BASE_V2_QUERY,
            _set_query_mock_v2,
            ApiException(),
        ),
        (
            API_VERSION_2,
            BASE_V2_CONFIG,
            BASE_V2_QUERY,
            _set_query_mock_v2,
            ApiException(status=400),
        ),
    ],
    indirect=["mock_client"],
)
async def test_error_querying_influx(
    hass, caplog, mock_client, config_ext, queries, set_query_mock, query_exception
):
    """Test behavior of sensor when influx returns error."""
    set_query_mock(mock_client, query_exception=query_exception)

    sensors = await _setup(hass, config_ext, queries, ["sensor.test"])
    assert sensors[0].state == STATE_UNKNOWN
    assert (
        len([record for record in caplog.records if record.levelname == "ERROR"]) == 1
    )


@pytest.mark.parametrize(
    "mock_client, config_ext, queries, set_query_mock, make_resultset",
    [
        (
            DEFAULT_API_VERSION,
            BASE_V1_CONFIG,
            {
                "queries": [
                    {
                        "name": "test",
                        "measurement": "measurement",
                        "where": "{{ illegal.template }}",
                        "field": "field",
                    }
                ]
            },
            _set_query_mock_v1,
            _make_v1_resultset,
        ),
        (
            API_VERSION_2,
            BASE_V2_CONFIG,
            {"queries_flux": [{"name": "test", "query": "{{ illegal.template }}"}]},
            _set_query_mock_v2,
            _make_v2_resultset,
        ),
    ],
    indirect=["mock_client"],
)
async def test_error_rendering_template(
    hass, caplog, mock_client, config_ext, queries, set_query_mock, make_resultset
):
    """Test behavior of sensor with error rendering template."""
    set_query_mock(mock_client, return_value=make_resultset(42))

    sensors = await _setup(hass, config_ext, queries, ["sensor.test"])
    assert sensors[0].state == STATE_UNKNOWN
    assert (
        len([record for record in caplog.records if record.levelname == "ERROR"]) == 1
    )


@pytest.mark.parametrize(
    "mock_client, config_ext, queries, set_query_mock, test_exception, make_resultset",
    [
        (
            DEFAULT_API_VERSION,
            BASE_V1_CONFIG,
            BASE_V1_QUERY,
            _set_query_mock_v1,
            OSError("fail"),
            _make_v1_resultset,
        ),
        (
            DEFAULT_API_VERSION,
            BASE_V1_CONFIG,
            BASE_V1_QUERY,
            _set_query_mock_v1,
            InfluxDBClientError("fail"),
            _make_v1_resultset,
        ),
        (
            DEFAULT_API_VERSION,
            BASE_V1_CONFIG,
            BASE_V1_QUERY,
            _set_query_mock_v1,
            InfluxDBServerError("fail"),
            _make_v1_resultset,
        ),
        (
            API_VERSION_2,
            BASE_V2_CONFIG,
            BASE_V2_QUERY,
            _set_query_mock_v2,
            OSError("fail"),
            _make_v2_resultset,
        ),
        (
            API_VERSION_2,
            BASE_V2_CONFIG,
            BASE_V2_QUERY,
            _set_query_mock_v2,
            ApiException(),
            _make_v2_resultset,
        ),
    ],
    indirect=["mock_client"],
)
async def test_connection_error_at_startup(
    hass,
    caplog,
    mock_client,
    config_ext,
    queries,
    set_query_mock,
    test_exception,
    make_resultset,
):
    """Test behavior of sensor when influx returns error."""
    query_api = set_query_mock(mock_client, side_effect=test_exception)
    expected_sensor = "sensor.test"

    # Test sensor is not setup first time due to connection error
    await _setup(hass, config_ext, queries, [])
    assert hass.states.get(expected_sensor) is None
    assert (
        len([record for record in caplog.records if record.levelname == "ERROR"]) == 1
    )

    # Stop throwing exception and advance time to test setup succeeds
    query_api.reset_mock(side_effect=True)
    set_query_mock(mock_client, return_value=make_resultset(42))
    new_time = dt_util.utcnow() + timedelta(seconds=PLATFORM_NOT_READY_BASE_WAIT_TIME)
    async_fire_time_changed(hass, new_time)
    await hass.async_block_till_done()
    assert hass.states.get(expected_sensor) is not None


@pytest.mark.parametrize(
    "mock_client, config_ext, queries, set_query_mock",
    [
        (
            DEFAULT_API_VERSION,
            {"database": "bad_db"},
            BASE_V1_QUERY,
            _set_query_mock_v1,
        ),
        (
            API_VERSION_2,
            {
                "api_version": API_VERSION_2,
                "organization": "org",
                "token": "token",
                "bucket": "bad_bucket",
            },
            BASE_V2_QUERY,
            _set_query_mock_v2,
        ),
    ],
    indirect=["mock_client"],
)
async def test_data_repository_not_found(
    hass, caplog, mock_client, config_ext, queries, set_query_mock,
):
    """Test sensor is not setup when bucket not available."""
    set_query_mock(mock_client)
    await _setup(hass, config_ext, queries, [])
    assert hass.states.get("sensor.test") is None
    assert (
        len([record for record in caplog.records if record.levelname == "ERROR"]) == 1
    )
