core/homeassistant/components/ipma/weather.py

"""Support for IPMA weather service."""
from datetime import timedelta
import logging

import async_timeout
from pyipma.api import IPMA_API
from pyipma.location import Location
import voluptuous as vol

from homeassistant.components.weather import (
    ATTR_FORECAST_CONDITION,
    ATTR_FORECAST_PRECIPITATION,
    ATTR_FORECAST_TEMP,
    ATTR_FORECAST_TEMP_LOW,
    ATTR_FORECAST_TIME,
    PLATFORM_SCHEMA,
    WeatherEntity,
)
from homeassistant.const import CONF_LATITUDE, CONF_LONGITUDE, CONF_NAME, TEMP_CELSIUS
from homeassistant.helpers import config_validation as cv
from homeassistant.helpers.aiohttp_client import async_get_clientsession
from homeassistant.util import Throttle

_LOGGER = logging.getLogger(__name__)

ATTRIBUTION = "Instituto Português do Mar e Atmosfera"

MIN_TIME_BETWEEN_UPDATES = timedelta(minutes=30)

CONDITION_CLASSES = {
    "cloudy": [4, 5, 24, 25, 27],
    "fog": [16, 17, 26],
    "hail": [21, 22],
    "lightning": [19],
    "lightning-rainy": [20, 23],
    "partlycloudy": [2, 3],
    "pouring": [8, 11],
    "rainy": [6, 7, 9, 10, 12, 13, 14, 15],
    "snowy": [18],
    "snowy-rainy": [],
    "sunny": [1],
    "windy": [],
    "windy-variant": [],
    "exceptional": [],
}

PLATFORM_SCHEMA = PLATFORM_SCHEMA.extend(
    {
        vol.Optional(CONF_NAME): cv.string,
        vol.Optional(CONF_LATITUDE): cv.latitude,
        vol.Optional(CONF_LONGITUDE): cv.longitude,
    }
)


async def async_setup_platform(hass, config, async_add_entities, discovery_info=None):
    """Set up the ipma platform.

    Deprecated.
    """
    _LOGGER.warning("Loading IPMA via platform config is deprecated")

    latitude = config.get(CONF_LATITUDE, hass.config.latitude)
    longitude = config.get(CONF_LONGITUDE, hass.config.longitude)

    if None in (latitude, longitude):
        _LOGGER.error("Latitude or longitude not set in Home Assistant config")
        return

    api = await async_get_api(hass)
    location = await async_get_location(hass, api, latitude, longitude)

    async_add_entities([IPMAWeather(location, api, config)], True)


async def async_setup_entry(hass, config_entry, async_add_entities):
    """Add a weather entity from a config_entry."""
    latitude = config_entry.data[CONF_LATITUDE]
    longitude = config_entry.data[CONF_LONGITUDE]

    api = await async_get_api(hass)
    location = await async_get_location(hass, api, latitude, longitude)

    async_add_entities([IPMAWeather(location, api, config_entry.data)], True)


async def async_get_api(hass):
    """Get the pyipma api object."""
    websession = async_get_clientsession(hass)
    return IPMA_API(websession)


async def async_get_location(hass, api, latitude, longitude):
    """Retrieve pyipma location, location name to be used as the entity name."""
    with async_timeout.timeout(10):
        location = await Location.get(api, float(latitude), float(longitude))

    _LOGGER.debug(
        "Initializing for coordinates %s, %s -> station %s",
        latitude,
        longitude,
        location.station,
    )

    return location


class IPMAWeather(WeatherEntity):
    """Representation of a weather condition."""

    def __init__(self, location: Location, api: IPMA_API, config):
        """Initialise the platform with a data instance and station name."""
        self._api = api
        self._location_name = config.get(CONF_NAME, location.name)
        self._location = location
        self._observation = None
        self._forecast = None

    @Throttle(MIN_TIME_BETWEEN_UPDATES)
    async def async_update(self):
        """Update Condition and Forecast."""
        with async_timeout.timeout(10):
            new_observation = await self._location.observation(self._api)
            new_forecast = await self._location.forecast(self._api)

            if new_observation:
                self._observation = new_observation
            else:
                _LOGGER.warning("Could not update weather observation")

            if new_forecast:
                self._forecast = [f for f in new_forecast if f.forecasted_hours == 24]
            else:
                _LOGGER.warning("Could not update weather forecast")

            _LOGGER.debug(
                "Updated location %s, observation %s",
                self._location.name,
                self._observation,
            )

    @property
    def unique_id(self) -> str:
        """Return a unique id."""
        return f"{self._location.station_latitude}, {self._location.station_longitude}"

    @property
    def attribution(self):
        """Return the attribution."""
        return ATTRIBUTION

    @property
    def name(self):
        """Return the name of the station."""
        return self._location_name

    @property
    def condition(self):
        """Return the current condition."""
        if not self._forecast:
            return

        return next(
            (
                k
                for k, v in CONDITION_CLASSES.items()
                if self._forecast[0].weather_type in v
            ),
            None,
        )

    @property
    def temperature(self):
        """Return the current temperature."""
        if not self._observation:
            return None

        return self._observation.temperature

    @property
    def pressure(self):
        """Return the current pressure."""
        if not self._observation:
            return None

        return self._observation.pressure

    @property
    def humidity(self):
        """Return the name of the sensor."""
        if not self._observation:
            return None

        return self._observation.humidity

    @property
    def wind_speed(self):
        """Return the current windspeed."""
        if not self._observation:
            return None

        return self._observation.wind_intensity_km

    @property
    def wind_bearing(self):
        """Return the current wind bearing (degrees)."""
        if not self._observation:
            return None

        return self._observation.wind_direction

    @property
    def temperature_unit(self):
        """Return the unit of measurement."""
        return TEMP_CELSIUS

    @property
    def forecast(self):
        """Return the forecast array."""
        if not self._forecast:
            return []

        fcdata_out = [
            {
                ATTR_FORECAST_TIME: data_in.forecast_date,
                ATTR_FORECAST_CONDITION: next(
                    (
                        k
                        for k, v in CONDITION_CLASSES.items()
                        if int(data_in.weather_type) in v
                    ),
                    None,
                ),
                ATTR_FORECAST_TEMP_LOW: data_in.min_temperature,
                ATTR_FORECAST_TEMP: data_in.max_temperature,
                ATTR_FORECAST_PRECIPITATION: data_in.precipitation_probability,
            }
            for data_in in self._forecast
        ]

        return fcdata_out