"""Support for Buienradar.nl weather service."""
import logging

import voluptuous as vol

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

# Reuse data and API logic from the sensor implementation
from .sensor import BrData

_LOGGER = logging.getLogger(__name__)

DATA_CONDITION = "buienradar_condition"

DEFAULT_TIMEFRAME = 60

CONF_FORECAST = "forecast"


CONDITION_CLASSES = {
    "cloudy": ["c", "p"],
    "fog": ["d", "n"],
    "hail": [],
    "lightning": ["g"],
    "lightning-rainy": ["s"],
    "partlycloudy": ["b", "j", "o", "r"],
    "pouring": ["l", "q"],
    "rainy": ["f", "h", "k", "m"],
    "snowy": ["u", "i", "v", "t"],
    "snowy-rainy": ["w"],
    "sunny": ["a"],
    "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,
        vol.Optional(CONF_FORECAST, default=True): cv.boolean,
    }
)


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

    coordinates = {CONF_LATITUDE: float(latitude), CONF_LONGITUDE: float(longitude)}

    # create weather data:
    data = BrData(hass, coordinates, DEFAULT_TIMEFRAME, None)
    # create weather device:
    _LOGGER.debug("Initializing buienradar weather: coordinates %s", coordinates)

    # create condition helper
    if DATA_CONDITION not in hass.data:
        cond_keys = [str(chr(x)) for x in range(97, 123)]
        hass.data[DATA_CONDITION] = dict.fromkeys(cond_keys)
        for cond, condlst in CONDITION_CLASSES.items():
            for condi in condlst:
                hass.data[DATA_CONDITION][condi] = cond

    async_add_entities([BrWeather(data, config)])

    # schedule the first update in 1 minute from now:
    await data.schedule_update(1)


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

    def __init__(self, data, config):
        """Initialise the platform with a data instance and station name."""
        self._stationname = config.get(CONF_NAME, None)
        self._forecast = config.get(CONF_FORECAST)
        self._data = data

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

    @property
    def name(self):
        """Return the name of the sensor."""
        return self._stationname or "BR {}".format(
            self._data.stationname or "(unknown station)"
        )

    @property
    def condition(self):
        """Return the current condition."""
        from buienradar.constants import CONDCODE

        if self._data and self._data.condition:
            ccode = self._data.condition.get(CONDCODE)
            if ccode:
                conditions = self.hass.data.get(DATA_CONDITION)
                if conditions:
                    return conditions.get(ccode)

    @property
    def temperature(self):
        """Return the current temperature."""
        return self._data.temperature

    @property
    def pressure(self):
        """Return the current pressure."""
        return self._data.pressure

    @property
    def humidity(self):
        """Return the name of the sensor."""
        return self._data.humidity

    @property
    def visibility(self):
        """Return the current visibility in km."""
        if self._data.visibility is None:
            return None
        return round(self._data.visibility / 1000, 1)

    @property
    def wind_speed(self):
        """Return the current windspeed in km/h."""
        if self._data.wind_speed is None:
            return None
        return round(self._data.wind_speed * 3.6, 1)

    @property
    def wind_bearing(self):
        """Return the current wind bearing (degrees)."""
        return self._data.wind_bearing

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

    @property
    def forecast(self):
        """Return the forecast array."""
        from buienradar.constants import (
            CONDITION,
            CONDCODE,
            RAIN,
            DATETIME,
            MIN_TEMP,
            MAX_TEMP,
            WINDAZIMUTH,
            WINDSPEED,
        )

        if not self._forecast:
            return None

        fcdata_out = []
        cond = self.hass.data[DATA_CONDITION]

        if not self._data.forecast:
            return None

        for data_in in self._data.forecast:
            # remap keys from external library to
            # keys understood by the weather component:
            condcode = data_in.get(CONDITION, []).get(CONDCODE)
            data_out = {
                ATTR_FORECAST_TIME: data_in.get(DATETIME),
                ATTR_FORECAST_CONDITION: cond[condcode],
                ATTR_FORECAST_TEMP_LOW: data_in.get(MIN_TEMP),
                ATTR_FORECAST_TEMP: data_in.get(MAX_TEMP),
                ATTR_FORECAST_PRECIPITATION: data_in.get(RAIN),
                ATTR_FORECAST_WIND_BEARING: data_in.get(WINDAZIMUTH),
                ATTR_FORECAST_WIND_SPEED: round(data_in.get(WINDSPEED) * 3.6, 1),
            }

            fcdata_out.append(data_out)

        return fcdata_out