"""Support for SLZB-06 sensors."""

from __future__ import annotations

from collections.abc import Callable
from dataclasses import dataclass

from pysmlight import Sensors

from homeassistant.components.sensor import (
    SensorDeviceClass,
    SensorEntity,
    SensorEntityDescription,
    SensorStateClass,
)
from homeassistant.const import EntityCategory, UnitOfInformation, UnitOfTemperature
from homeassistant.core import HomeAssistant
from homeassistant.helpers.entity_platform import AddEntitiesCallback

from . import SmConfigEntry
from .coordinator import SmDataUpdateCoordinator
from .entity import SmEntity


@dataclass(frozen=True, kw_only=True)
class SmSensorEntityDescription(SensorEntityDescription):
    """Class describing SMLIGHT sensor entities."""

    entity_category = EntityCategory.DIAGNOSTIC
    value_fn: Callable[[Sensors], float | None]


SENSORS = [
    SmSensorEntityDescription(
        key="core_temperature",
        translation_key="core_temperature",
        device_class=SensorDeviceClass.TEMPERATURE,
        native_unit_of_measurement=UnitOfTemperature.CELSIUS,
        state_class=SensorStateClass.MEASUREMENT,
        suggested_display_precision=1,
        value_fn=lambda x: x.esp32_temp,
    ),
    SmSensorEntityDescription(
        key="zigbee_temperature",
        translation_key="zigbee_temperature",
        device_class=SensorDeviceClass.TEMPERATURE,
        native_unit_of_measurement=UnitOfTemperature.CELSIUS,
        state_class=SensorStateClass.MEASUREMENT,
        suggested_display_precision=1,
        value_fn=lambda x: x.zb_temp,
    ),
    SmSensorEntityDescription(
        key="ram_usage",
        translation_key="ram_usage",
        device_class=SensorDeviceClass.DATA_SIZE,
        native_unit_of_measurement=UnitOfInformation.KILOBYTES,
        entity_registry_enabled_default=False,
        value_fn=lambda x: x.ram_usage,
    ),
    SmSensorEntityDescription(
        key="fs_usage",
        translation_key="fs_usage",
        device_class=SensorDeviceClass.DATA_SIZE,
        native_unit_of_measurement=UnitOfInformation.KILOBYTES,
        entity_registry_enabled_default=False,
        value_fn=lambda x: x.fs_used,
    ),
]


async def async_setup_entry(
    hass: HomeAssistant,
    entry: SmConfigEntry,
    async_add_entities: AddEntitiesCallback,
) -> None:
    """Set up SMLIGHT sensor based on a config entry."""
    coordinator = entry.runtime_data

    async_add_entities(
        SmSensorEntity(coordinator, description) for description in SENSORS
    )


class SmSensorEntity(SmEntity, SensorEntity):
    """Representation of a slzb sensor."""

    entity_description: SmSensorEntityDescription

    def __init__(
        self,
        coordinator: SmDataUpdateCoordinator,
        description: SmSensorEntityDescription,
    ) -> None:
        """Initiate slzb sensor."""
        super().__init__(coordinator)

        self.entity_description = description
        self._attr_unique_id = f"{coordinator.unique_id}_{description.key}"

    @property
    def native_value(self) -> float | None:
        """Return the sensor value."""
        return self.entity_description.value_fn(self.coordinator.data.sensors)