"""Weather component that handles meteorological data for your location."""
from __future__ import annotations

from abc import abstractmethod
from collections.abc import Mapping
from datetime import datetime
from typing import Any, cast

from pyclimacell.const import CURRENT, DAILY, FORECASTS, HOURLY, NOWCAST

from homeassistant.components.weather import (
    ATTR_FORECAST_CONDITION,
    ATTR_FORECAST_PRECIPITATION,
    ATTR_FORECAST_PRECIPITATION_PROBABILITY,
    ATTR_FORECAST_TEMP,
    ATTR_FORECAST_TEMP_LOW,
    ATTR_FORECAST_TIME,
    ATTR_FORECAST_WIND_BEARING,
    ATTR_FORECAST_WIND_SPEED,
    WeatherEntity,
)
from homeassistant.config_entries import ConfigEntry
from homeassistant.const import (
    CONF_API_VERSION,
    CONF_NAME,
    LENGTH_FEET,
    LENGTH_KILOMETERS,
    LENGTH_METERS,
    LENGTH_MILES,
    PRESSURE_HPA,
    PRESSURE_INHG,
    SPEED_KILOMETERS_PER_HOUR,
    SPEED_MILES_PER_HOUR,
    TEMP_FAHRENHEIT,
)
from homeassistant.core import HomeAssistant
from homeassistant.helpers.entity_platform import AddEntitiesCallback
from homeassistant.helpers.sun import is_up
from homeassistant.util import dt as dt_util
from homeassistant.util.distance import convert as distance_convert
from homeassistant.util.pressure import convert as pressure_convert
from homeassistant.util.speed import convert as speed_convert

from . import ClimaCellDataUpdateCoordinator, ClimaCellEntity
from .const import (
    ATTR_CLOUD_COVER,
    ATTR_PRECIPITATION_TYPE,
    ATTR_WIND_GUST,
    CC_V3_ATTR_CLOUD_COVER,
    CC_V3_ATTR_CONDITION,
    CC_V3_ATTR_HUMIDITY,
    CC_V3_ATTR_OZONE,
    CC_V3_ATTR_PRECIPITATION,
    CC_V3_ATTR_PRECIPITATION_DAILY,
    CC_V3_ATTR_PRECIPITATION_PROBABILITY,
    CC_V3_ATTR_PRECIPITATION_TYPE,
    CC_V3_ATTR_PRESSURE,
    CC_V3_ATTR_TEMPERATURE,
    CC_V3_ATTR_TEMPERATURE_HIGH,
    CC_V3_ATTR_TEMPERATURE_LOW,
    CC_V3_ATTR_TIMESTAMP,
    CC_V3_ATTR_VISIBILITY,
    CC_V3_ATTR_WIND_DIRECTION,
    CC_V3_ATTR_WIND_GUST,
    CC_V3_ATTR_WIND_SPEED,
    CLEAR_CONDITIONS,
    CONDITIONS_V3,
    CONF_TIMESTEP,
    DEFAULT_FORECAST_TYPE,
    DOMAIN,
)


async def async_setup_entry(
    hass: HomeAssistant,
    config_entry: ConfigEntry,
    async_add_entities: AddEntitiesCallback,
) -> None:
    """Set up a config entry."""
    coordinator = hass.data[DOMAIN][config_entry.entry_id]
    api_version = config_entry.data[CONF_API_VERSION]
    entities = [
        ClimaCellV3WeatherEntity(config_entry, coordinator, api_version, forecast_type)
        for forecast_type in (DAILY, HOURLY, NOWCAST)
    ]
    async_add_entities(entities)


class BaseClimaCellWeatherEntity(ClimaCellEntity, WeatherEntity):
    """Base ClimaCell weather entity."""

    def __init__(
        self,
        config_entry: ConfigEntry,
        coordinator: ClimaCellDataUpdateCoordinator,
        api_version: int,
        forecast_type: str,
    ) -> None:
        """Initialize ClimaCell Weather Entity."""
        super().__init__(config_entry, coordinator, api_version)
        self.forecast_type = forecast_type
        self._attr_entity_registry_enabled_default = (
            forecast_type == DEFAULT_FORECAST_TYPE
        )
        self._attr_name = f"{config_entry.data[CONF_NAME]} - {forecast_type.title()}"
        self._attr_unique_id = f"{config_entry.unique_id}_{forecast_type}"

    @staticmethod
    @abstractmethod
    def _translate_condition(
        condition: str | int | None, sun_is_up: bool = True
    ) -> str | None:
        """Translate ClimaCell condition into an HA condition."""

    def _forecast_dict(
        self,
        forecast_dt: datetime,
        use_datetime: bool,
        condition: int | str,
        precipitation: float | None,
        precipitation_probability: float | None,
        temp: float | None,
        temp_low: float | None,
        wind_direction: float | None,
        wind_speed: float | None,
    ) -> dict[str, Any]:
        """Return formatted Forecast dict from ClimaCell forecast data."""
        if use_datetime:
            translated_condition = self._translate_condition(
                condition, is_up(self.hass, forecast_dt)
            )
        else:
            translated_condition = self._translate_condition(condition, True)

        if self.hass.config.units.is_metric:
            if precipitation:
                precipitation = round(
                    distance_convert(precipitation / 12, LENGTH_FEET, LENGTH_METERS)
                    * 1000,
                    4,
                )
            if wind_speed:
                wind_speed = round(
                    speed_convert(
                        wind_speed, SPEED_MILES_PER_HOUR, SPEED_KILOMETERS_PER_HOUR
                    ),
                    4,
                )

        data = {
            ATTR_FORECAST_TIME: forecast_dt.isoformat(),
            ATTR_FORECAST_CONDITION: translated_condition,
            ATTR_FORECAST_PRECIPITATION: precipitation,
            ATTR_FORECAST_PRECIPITATION_PROBABILITY: precipitation_probability,
            ATTR_FORECAST_TEMP: temp,
            ATTR_FORECAST_TEMP_LOW: temp_low,
            ATTR_FORECAST_WIND_BEARING: wind_direction,
            ATTR_FORECAST_WIND_SPEED: wind_speed,
        }

        return {k: v for k, v in data.items() if v is not None}

    @property
    def extra_state_attributes(self) -> Mapping[str, Any] | None:
        """Return additional state attributes."""
        wind_gust = self.wind_gust
        if wind_gust and self.hass.config.units.is_metric:
            wind_gust = round(
                speed_convert(
                    self.wind_gust, SPEED_MILES_PER_HOUR, SPEED_KILOMETERS_PER_HOUR
                ),
                4,
            )
        cloud_cover = self.cloud_cover
        return {
            ATTR_CLOUD_COVER: cloud_cover,
            ATTR_WIND_GUST: wind_gust,
            ATTR_PRECIPITATION_TYPE: self.precipitation_type,
        }

    @property
    @abstractmethod
    def cloud_cover(self):
        """Return cloud cover."""

    @property
    @abstractmethod
    def wind_gust(self):
        """Return wind gust speed."""

    @property
    @abstractmethod
    def precipitation_type(self):
        """Return precipitation type."""

    @property
    @abstractmethod
    def _pressure(self):
        """Return the raw pressure."""

    @property
    def pressure(self):
        """Return the pressure."""
        if self.hass.config.units.is_metric and self._pressure:
            return round(
                pressure_convert(self._pressure, PRESSURE_INHG, PRESSURE_HPA), 4
            )
        return self._pressure

    @property
    @abstractmethod
    def _wind_speed(self):
        """Return the raw wind speed."""

    @property
    def wind_speed(self):
        """Return the wind speed."""
        if self.hass.config.units.is_metric and self._wind_speed:
            return round(
                speed_convert(
                    self._wind_speed, SPEED_MILES_PER_HOUR, SPEED_KILOMETERS_PER_HOUR
                ),
                4,
            )
        return self._wind_speed

    @property
    @abstractmethod
    def _visibility(self):
        """Return the raw visibility."""

    @property
    def visibility(self):
        """Return the visibility."""
        if self.hass.config.units.is_metric and self._visibility:
            return round(
                distance_convert(self._visibility, LENGTH_MILES, LENGTH_KILOMETERS), 4
            )
        return self._visibility


class ClimaCellV3WeatherEntity(BaseClimaCellWeatherEntity):
    """Entity that talks to ClimaCell v3 API to retrieve weather data."""

    _attr_temperature_unit = TEMP_FAHRENHEIT

    @staticmethod
    def _translate_condition(
        condition: int | str | None, sun_is_up: bool = True
    ) -> str | None:
        """Translate ClimaCell condition into an HA condition."""
        if not condition:
            return None
        condition = cast(str, condition)
        if "clear" in condition.lower():
            if sun_is_up:
                return CLEAR_CONDITIONS["day"]
            return CLEAR_CONDITIONS["night"]
        return CONDITIONS_V3[condition]

    @property
    def temperature(self):
        """Return the platform temperature."""
        return self._get_cc_value(
            self.coordinator.data[CURRENT], CC_V3_ATTR_TEMPERATURE
        )

    @property
    def _pressure(self):
        """Return the raw pressure."""
        return self._get_cc_value(self.coordinator.data[CURRENT], CC_V3_ATTR_PRESSURE)

    @property
    def humidity(self):
        """Return the humidity."""
        return self._get_cc_value(self.coordinator.data[CURRENT], CC_V3_ATTR_HUMIDITY)

    @property
    def wind_gust(self):
        """Return the wind gust speed."""
        return self._get_cc_value(self.coordinator.data[CURRENT], CC_V3_ATTR_WIND_GUST)

    @property
    def cloud_cover(self):
        """Return the cloud cover."""
        return self._get_cc_value(
            self.coordinator.data[CURRENT], CC_V3_ATTR_CLOUD_COVER
        )

    @property
    def precipitation_type(self):
        """Return precipitation type."""
        return self._get_cc_value(
            self.coordinator.data[CURRENT], CC_V3_ATTR_PRECIPITATION_TYPE
        )

    @property
    def _wind_speed(self):
        """Return the raw wind speed."""
        return self._get_cc_value(self.coordinator.data[CURRENT], CC_V3_ATTR_WIND_SPEED)

    @property
    def wind_bearing(self):
        """Return the wind bearing."""
        return self._get_cc_value(
            self.coordinator.data[CURRENT], CC_V3_ATTR_WIND_DIRECTION
        )

    @property
    def ozone(self):
        """Return the O3 (ozone) level."""
        return self._get_cc_value(self.coordinator.data[CURRENT], CC_V3_ATTR_OZONE)

    @property
    def condition(self):
        """Return the condition."""
        return self._translate_condition(
            self._get_cc_value(self.coordinator.data[CURRENT], CC_V3_ATTR_CONDITION),
            is_up(self.hass),
        )

    @property
    def _visibility(self):
        """Return the raw visibility."""
        return self._get_cc_value(self.coordinator.data[CURRENT], CC_V3_ATTR_VISIBILITY)

    @property
    def forecast(self):
        """Return the forecast."""
        # Check if forecasts are available
        raw_forecasts = self.coordinator.data.get(FORECASTS, {}).get(self.forecast_type)
        if not raw_forecasts:
            return None

        forecasts = []

        # Set default values (in cases where keys don't exist), None will be
        # returned. Override properties per forecast type as needed
        for forecast in raw_forecasts:
            forecast_dt = dt_util.parse_datetime(
                self._get_cc_value(forecast, CC_V3_ATTR_TIMESTAMP)
            )
            use_datetime = True
            condition = self._get_cc_value(forecast, CC_V3_ATTR_CONDITION)
            precipitation = self._get_cc_value(forecast, CC_V3_ATTR_PRECIPITATION)
            precipitation_probability = self._get_cc_value(
                forecast, CC_V3_ATTR_PRECIPITATION_PROBABILITY
            )
            temp = self._get_cc_value(forecast, CC_V3_ATTR_TEMPERATURE)
            temp_low = None
            wind_direction = self._get_cc_value(forecast, CC_V3_ATTR_WIND_DIRECTION)
            wind_speed = self._get_cc_value(forecast, CC_V3_ATTR_WIND_SPEED)

            if self.forecast_type == DAILY:
                use_datetime = False
                forecast_dt = dt_util.start_of_local_day(forecast_dt)
                precipitation = self._get_cc_value(
                    forecast, CC_V3_ATTR_PRECIPITATION_DAILY
                )
                temp = next(
                    (
                        self._get_cc_value(item, CC_V3_ATTR_TEMPERATURE_HIGH)
                        for item in forecast[CC_V3_ATTR_TEMPERATURE]
                        if "max" in item
                    ),
                    temp,
                )
                temp_low = next(
                    (
                        self._get_cc_value(item, CC_V3_ATTR_TEMPERATURE_LOW)
                        for item in forecast[CC_V3_ATTR_TEMPERATURE]
                        if "min" in item
                    ),
                    temp_low,
                )
            elif self.forecast_type == NOWCAST and precipitation:
                # Precipitation is forecasted in CONF_TIMESTEP increments but in a
                # per hour rate, so value needs to be converted to an amount.
                precipitation = (
                    precipitation / 60 * self._config_entry.options[CONF_TIMESTEP]
                )

            forecasts.append(
                self._forecast_dict(
                    forecast_dt,
                    use_datetime,
                    condition,
                    precipitation,
                    precipitation_probability,
                    temp,
                    temp_low,
                    wind_direction,
                    wind_speed,
                )
            )

        return forecasts