"""Support for govee ble sensors."""

from __future__ import annotations

from datetime import date, datetime
from decimal import Decimal

from govee_ble import DeviceClass, SensorUpdate, Units
from govee_ble.parser import ERROR

from homeassistant.components.bluetooth.passive_update_processor import (
    PassiveBluetoothDataProcessor,
    PassiveBluetoothDataUpdate,
    PassiveBluetoothProcessorEntity,
)
from homeassistant.components.sensor import (
    SensorDeviceClass,
    SensorEntity,
    SensorEntityDescription,
    SensorStateClass,
)
from homeassistant.const import (
    CONCENTRATION_MICROGRAMS_PER_CUBIC_METER,
    PERCENTAGE,
    SIGNAL_STRENGTH_DECIBELS_MILLIWATT,
    UnitOfTemperature,
)
from homeassistant.core import HomeAssistant
from homeassistant.helpers.entity_platform import AddEntitiesCallback
from homeassistant.helpers.sensor import sensor_device_info_to_hass_device_info

from .coordinator import GoveeBLEConfigEntry, GoveeBLEPassiveBluetoothDataProcessor
from .device import device_key_to_bluetooth_entity_key

type _SensorValueType = str | int | float | date | datetime | Decimal | None

SENSOR_DESCRIPTIONS = {
    (DeviceClass.TEMPERATURE, Units.TEMP_CELSIUS): SensorEntityDescription(
        key=f"{DeviceClass.TEMPERATURE}_{Units.TEMP_CELSIUS}",
        device_class=SensorDeviceClass.TEMPERATURE,
        native_unit_of_measurement=UnitOfTemperature.CELSIUS,
        state_class=SensorStateClass.MEASUREMENT,
    ),
    (DeviceClass.HUMIDITY, Units.PERCENTAGE): SensorEntityDescription(
        key=f"{DeviceClass.HUMIDITY}_{Units.PERCENTAGE}",
        device_class=SensorDeviceClass.HUMIDITY,
        native_unit_of_measurement=PERCENTAGE,
        state_class=SensorStateClass.MEASUREMENT,
    ),
    (DeviceClass.BATTERY, Units.PERCENTAGE): SensorEntityDescription(
        key=f"{DeviceClass.BATTERY}_{Units.PERCENTAGE}",
        device_class=SensorDeviceClass.BATTERY,
        native_unit_of_measurement=PERCENTAGE,
        state_class=SensorStateClass.MEASUREMENT,
    ),
    (
        DeviceClass.SIGNAL_STRENGTH,
        Units.SIGNAL_STRENGTH_DECIBELS_MILLIWATT,
    ): SensorEntityDescription(
        key=f"{DeviceClass.SIGNAL_STRENGTH}_{Units.SIGNAL_STRENGTH_DECIBELS_MILLIWATT}",
        device_class=SensorDeviceClass.SIGNAL_STRENGTH,
        native_unit_of_measurement=SIGNAL_STRENGTH_DECIBELS_MILLIWATT,
        state_class=SensorStateClass.MEASUREMENT,
        entity_registry_enabled_default=False,
    ),
    (
        DeviceClass.PM25,
        Units.CONCENTRATION_MICROGRAMS_PER_CUBIC_METER,
    ): SensorEntityDescription(
        key=f"{DeviceClass.PM25}_{Units.CONCENTRATION_MICROGRAMS_PER_CUBIC_METER}",
        device_class=SensorDeviceClass.PM25,
        native_unit_of_measurement=CONCENTRATION_MICROGRAMS_PER_CUBIC_METER,
        state_class=SensorStateClass.MEASUREMENT,
    ),
}


def sensor_update_to_bluetooth_data_update(
    sensor_update: SensorUpdate,
) -> PassiveBluetoothDataUpdate[_SensorValueType]:
    """Convert a sensor update to a bluetooth data update."""
    return PassiveBluetoothDataUpdate(
        devices={
            device_id: sensor_device_info_to_hass_device_info(device_info)
            for device_id, device_info in sensor_update.devices.items()
        },
        entity_descriptions={
            device_key_to_bluetooth_entity_key(device_key): SENSOR_DESCRIPTIONS[
                (description.device_class, description.native_unit_of_measurement)
            ]
            for device_key, description in sensor_update.entity_descriptions.items()
            if description.device_class and description.native_unit_of_measurement
        },
        entity_data={
            device_key_to_bluetooth_entity_key(device_key): sensor_values.native_value
            for device_key, sensor_values in sensor_update.entity_values.items()
        },
        entity_names={
            device_key_to_bluetooth_entity_key(device_key): sensor_values.name
            for device_key, sensor_values in sensor_update.entity_values.items()
        },
    )


async def async_setup_entry(
    hass: HomeAssistant,
    entry: GoveeBLEConfigEntry,
    async_add_entities: AddEntitiesCallback,
) -> None:
    """Set up the Govee BLE sensors."""
    coordinator = entry.runtime_data
    processor = PassiveBluetoothDataProcessor(sensor_update_to_bluetooth_data_update)
    entry.async_on_unload(
        processor.async_add_entities_listener(
            GoveeBluetoothSensorEntity, async_add_entities
        )
    )
    entry.async_on_unload(
        coordinator.async_register_processor(processor, SensorEntityDescription)
    )


class GoveeBluetoothSensorEntity(
    PassiveBluetoothProcessorEntity[
        PassiveBluetoothDataProcessor[_SensorValueType, SensorUpdate]
    ],
    SensorEntity,
):
    """Representation of a govee ble sensor."""

    processor: GoveeBLEPassiveBluetoothDataProcessor[_SensorValueType]

    @property
    def available(self) -> bool:
        """Return False if sensor is in error."""
        coordinator = self.processor.coordinator
        return self.processor.entity_data.get(self.entity_key) != ERROR and (
            ((model_info := coordinator.model_info) and model_info.sleepy)
            or super().available
        )

    @property
    def native_value(self) -> _SensorValueType:  # pylint: disable=hass-return-type
        """Return the native value."""
        return self.processor.entity_data.get(self.entity_key)