"""Support for the Airly sensor service."""
from __future__ import annotations

from typing import cast

from homeassistant.components.sensor import ATTR_STATE_CLASS, SensorEntity
from homeassistant.config_entries import ConfigEntry
from homeassistant.const import (
    ATTR_ATTRIBUTION,
    ATTR_DEVICE_CLASS,
    ATTR_ICON,
    CONF_NAME,
)
from homeassistant.core import HomeAssistant
from homeassistant.helpers.entity import DeviceInfo
from homeassistant.helpers.entity_platform import AddEntitiesCallback
from homeassistant.helpers.typing import StateType
from homeassistant.helpers.update_coordinator import CoordinatorEntity

from . import AirlyDataUpdateCoordinator
from .const import (
    ATTR_API_PM1,
    ATTR_API_PRESSURE,
    ATTR_LABEL,
    ATTR_UNIT,
    ATTRIBUTION,
    DEFAULT_NAME,
    DOMAIN,
    MANUFACTURER,
    SENSOR_TYPES,
)

PARALLEL_UPDATES = 1


async def async_setup_entry(
    hass: HomeAssistant, entry: ConfigEntry, async_add_entities: AddEntitiesCallback
) -> None:
    """Set up Airly sensor entities based on a config entry."""
    name = entry.data[CONF_NAME]

    coordinator = hass.data[DOMAIN][entry.entry_id]

    sensors = []
    for sensor in SENSOR_TYPES:
        # When we use the nearest method, we are not sure which sensors are available
        if coordinator.data.get(sensor):
            sensors.append(AirlySensor(coordinator, name, sensor))

    async_add_entities(sensors, False)


class AirlySensor(CoordinatorEntity, SensorEntity):
    """Define an Airly sensor."""

    coordinator: AirlyDataUpdateCoordinator

    def __init__(
        self, coordinator: AirlyDataUpdateCoordinator, name: str, kind: str
    ) -> None:
        """Initialize."""
        super().__init__(coordinator)
        description = SENSOR_TYPES[kind]
        self._attr_device_class = description[ATTR_DEVICE_CLASS]
        self._attr_extra_state_attributes = {ATTR_ATTRIBUTION: ATTRIBUTION}
        self._attr_icon = description[ATTR_ICON]
        self._attr_name = f"{name} {description[ATTR_LABEL]}"
        self._attr_state_class = description[ATTR_STATE_CLASS]
        self._attr_unique_id = (
            f"{coordinator.latitude}-{coordinator.longitude}-{kind.lower()}"
        )
        self._attr_unit_of_measurement = description[ATTR_UNIT]
        self.kind = kind
        self._state = None

    @property
    def state(self) -> StateType:
        """Return the state."""
        self._state = self.coordinator.data[self.kind]
        if self.kind in [ATTR_API_PM1, ATTR_API_PRESSURE]:
            return round(cast(float, self._state))
        return round(cast(float, self._state), 1)

    @property
    def device_info(self) -> DeviceInfo:
        """Return the device info."""
        return {
            "identifiers": {
                (
                    DOMAIN,
                    f"{self.coordinator.latitude}-{self.coordinator.longitude}",
                )
            },
            "name": DEFAULT_NAME,
            "manufacturer": MANUFACTURER,
            "entry_type": "service",
        }