"""Sensor platform for UniFi Network integration.

Support for bandwidth sensors of network clients.
Support for uptime sensors of network clients.
"""

from __future__ import annotations

from collections.abc import Callable
from dataclasses import dataclass
from datetime import date, datetime, timedelta
from decimal import Decimal
from functools import partial
from typing import TYPE_CHECKING, Literal

from aiounifi.interfaces.api_handlers import ItemEvent
from aiounifi.interfaces.clients import Clients
from aiounifi.interfaces.devices import Devices
from aiounifi.interfaces.outlets import Outlets
from aiounifi.interfaces.ports import Ports
from aiounifi.interfaces.wlans import Wlans
from aiounifi.models.api import ApiItemT
from aiounifi.models.client import Client
from aiounifi.models.device import (
    Device,
    TypedDeviceTemperature,
    TypedDeviceUptimeStatsWanMonitor,
)
from aiounifi.models.outlet import Outlet
from aiounifi.models.port import Port
from aiounifi.models.wlan import Wlan

from homeassistant.components.sensor import (
    SensorDeviceClass,
    SensorEntity,
    SensorEntityDescription,
    SensorStateClass,
    UnitOfTemperature,
)
from homeassistant.const import (
    PERCENTAGE,
    EntityCategory,
    UnitOfDataRate,
    UnitOfPower,
    UnitOfTime,
)
from homeassistant.core import Event as core_Event, HomeAssistant, callback
from homeassistant.helpers.dispatcher import async_dispatcher_connect
from homeassistant.helpers.entity_platform import AddConfigEntryEntitiesCallback
from homeassistant.helpers.typing import StateType
from homeassistant.util import dt as dt_util, slugify

from . import UnifiConfigEntry
from .const import DEVICE_STATES
from .entity import (
    HandlerT,
    UnifiEntity,
    UnifiEntityDescription,
    async_client_device_info_fn,
    async_device_available_fn,
    async_device_device_info_fn,
    async_wlan_available_fn,
    async_wlan_device_info_fn,
)
from .hub import UnifiHub


@callback
def async_bandwidth_sensor_allowed_fn(hub: UnifiHub, obj_id: str) -> bool:
    """Check if client is allowed."""
    if obj_id in hub.config.option_supported_clients:
        return True
    return hub.config.option_allow_bandwidth_sensors


@callback
def async_uptime_sensor_allowed_fn(hub: UnifiHub, obj_id: str) -> bool:
    """Check if client is allowed."""
    if obj_id in hub.config.option_supported_clients:
        return True
    return hub.config.option_allow_uptime_sensors


@callback
def async_client_rx_value_fn(hub: UnifiHub, client: Client) -> float:
    """Calculate receiving data transfer value."""
    if hub.entity_loader.wireless_clients.is_wireless(client):
        return client.rx_bytes_r / 1000000
    return client.wired_rx_bytes_r / 1000000


@callback
def async_client_tx_value_fn(hub: UnifiHub, client: Client) -> float:
    """Calculate transmission data transfer value."""
    if hub.entity_loader.wireless_clients.is_wireless(client):
        return client.tx_bytes_r / 1000000
    return client.wired_tx_bytes_r / 1000000


@callback
def async_client_uptime_value_fn(hub: UnifiHub, client: Client) -> datetime:
    """Calculate the uptime of the client."""
    if client.uptime < 1000000000:
        return dt_util.now() - timedelta(seconds=client.uptime)
    return dt_util.utc_from_timestamp(float(client.uptime))


@callback
def async_wlan_client_value_fn(hub: UnifiHub, wlan: Wlan) -> int:
    """Calculate the amount of clients connected to a wlan."""
    return len(
        [
            client.mac
            for client in hub.api.clients.values()
            if client.essid == wlan.name
            and dt_util.utcnow() - dt_util.utc_from_timestamp(client.last_seen or 0)
            < hub.config.option_detection_time
        ]
    )


@callback
def async_device_clients_value_fn(hub: UnifiHub, device: Device) -> int:
    """Calculate the amount of clients connected to a device."""

    return len(
        [
            client.mac
            for client in hub.api.clients.values()
            if (
                (
                    client.access_point_mac != ""
                    and client.access_point_mac == device.mac
                )
                or (client.access_point_mac == "" and client.switch_mac == device.mac)
            )
            and dt_util.utcnow() - dt_util.utc_from_timestamp(client.last_seen or 0)
            < hub.config.option_detection_time
        ]
    )


@callback
def async_device_uptime_value_fn(hub: UnifiHub, device: Device) -> datetime | None:
    """Calculate the approximate time the device started (based on uptime returned from API, in seconds)."""
    if device.uptime <= 0:
        # Library defaults to 0 if uptime is not provided, e.g. when offline
        return None
    return (dt_util.now() - timedelta(seconds=device.uptime)).replace(microsecond=0)


@callback
def async_uptime_value_changed_fn(
    old: StateType | date | datetime | Decimal, new: datetime | float | str | None
) -> bool:
    """Reject the new uptime value if it's too similar to the old one. Avoids unwanted fluctuation."""
    if isinstance(old, datetime) and isinstance(new, datetime):
        return new != old and abs((new - old).total_seconds()) > 120
    return old is None or (new != old)


@callback
def async_device_outlet_power_supported_fn(hub: UnifiHub, obj_id: str) -> bool:
    """Determine if an outlet has the power property."""
    # At this time, an outlet_caps value of 3 is expected to indicate that the outlet
    # supports metering
    return hub.api.outlets[obj_id].caps == 3


@callback
def async_device_outlet_supported_fn(hub: UnifiHub, obj_id: str) -> bool:
    """Determine if a device supports reading overall power metrics."""
    return hub.api.devices[obj_id].outlet_ac_power_budget is not None


@callback
def async_device_uplink_mac_supported_fn(hub: UnifiHub, obj_id: str) -> bool:
    """Determine if a device supports reading uplink MAC address."""
    return "uplink_mac" in hub.api.devices[obj_id].raw.get("uplink", {})


def device_system_stats_supported_fn(
    stat_index: int, hub: UnifiHub, obj_id: str
) -> bool:
    """Determine if a device supports reading item at index in system stats."""
    return (
        "system-stats" in hub.api.devices[obj_id].raw
        and hub.api.devices[obj_id].system_stats[stat_index] != ""
    )


@callback
def async_client_is_connected_fn(hub: UnifiHub, obj_id: str) -> bool:
    """Check if client was last seen recently."""
    client = hub.api.clients[obj_id]

    if (
        dt_util.utcnow() - dt_util.utc_from_timestamp(client.last_seen or 0)
        > hub.config.option_detection_time
    ):
        return False

    return True


@callback
def async_device_state_value_fn(hub: UnifiHub, device: Device) -> str | None:
    """Retrieve the state of the device."""
    return DEVICE_STATES.get(device.state)


@callback
def async_device_wan_latency_supported_fn(
    wan: Literal["WAN", "WAN2"],
    monitor_target: str,
    hub: UnifiHub,
    obj_id: str,
) -> bool:
    """Determine if an device have a latency monitor."""
    if (device := hub.api.devices[obj_id]) and device.uptime_stats:
        return _device_wan_latency_monitor(wan, monitor_target, device) is not None
    return False


@callback
def async_device_wan_latency_value_fn(
    wan: Literal["WAN", "WAN2"],
    monitor_target: str,
    hub: UnifiHub,
    device: Device,
) -> int | None:
    """Retrieve the monitor target from WAN monitors."""
    target = _device_wan_latency_monitor(wan, monitor_target, device)

    if TYPE_CHECKING:
        # Checked by async_device_wan_latency_supported_fn
        assert target

    return target.get("latency_average", 0)


@callback
def _device_wan_latency_monitor(
    wan: Literal["WAN", "WAN2"], monitor_target: str, device: Device
) -> TypedDeviceUptimeStatsWanMonitor | None:
    """Return the target of the WAN latency monitor."""
    if device.uptime_stats and (uptime_stats_wan := device.uptime_stats.get(wan)):
        for monitor in uptime_stats_wan["monitors"]:
            if monitor_target in monitor["target"]:
                return monitor
    return None


def make_wan_latency_sensors() -> tuple[UnifiSensorEntityDescription, ...]:
    """Create WAN latency sensors from WAN monitor data."""

    def make_wan_latency_entity_description(
        wan: Literal["WAN", "WAN2"], name: str, monitor_target: str
    ) -> UnifiSensorEntityDescription:
        name_wan = f"{name} {wan}"
        return UnifiSensorEntityDescription[Devices, Device](
            key=f"{name_wan} latency",
            entity_category=EntityCategory.DIAGNOSTIC,
            native_unit_of_measurement=UnitOfTime.MILLISECONDS,
            state_class=SensorStateClass.MEASUREMENT,
            device_class=SensorDeviceClass.DURATION,
            entity_registry_enabled_default=False,
            api_handler_fn=lambda api: api.devices,
            available_fn=async_device_available_fn,
            device_info_fn=async_device_device_info_fn,
            name_fn=lambda device: f"{name_wan} latency",
            object_fn=lambda api, obj_id: api.devices[obj_id],
            supported_fn=partial(
                async_device_wan_latency_supported_fn, wan, monitor_target
            ),
            unique_id_fn=lambda hub, obj_id: f"{slugify(name_wan)}_latency-{obj_id}",
            value_fn=partial(async_device_wan_latency_value_fn, wan, monitor_target),
        )

    wans: tuple[Literal["WAN"], Literal["WAN2"]] = ("WAN", "WAN2")
    return tuple(
        make_wan_latency_entity_description(wan, name, target)
        for wan in wans
        for name, target in (
            ("Microsoft", "microsoft"),
            ("Google", "google"),
            ("Cloudflare", "1.1.1.1"),
        )
    )


@callback
def async_device_temperatures_value_fn(
    temperature_name: str, hub: UnifiHub, device: Device
) -> float:
    """Retrieve the temperature of the device."""
    return_value: float = 0
    if device.temperatures:
        temperature = _device_temperature(temperature_name, device.temperatures)
        return_value = temperature if temperature is not None else 0
    return return_value


@callback
def async_device_temperatures_supported_fn(
    temperature_name: str, hub: UnifiHub, obj_id: str
) -> bool:
    """Determine if an device have a temperatures."""
    if (device := hub.api.devices[obj_id]) and device.temperatures:
        return _device_temperature(temperature_name, device.temperatures) is not None
    return False


@callback
def _device_temperature(
    temperature_name: str, temperatures: list[TypedDeviceTemperature]
) -> float | None:
    """Return the temperature of the device."""
    for temperature in temperatures:
        if temperature_name in temperature["name"]:
            return temperature["value"]
    return None


def make_device_temperatur_sensors() -> tuple[UnifiSensorEntityDescription, ...]:
    """Create device temperature sensors."""

    def make_device_temperature_entity_description(
        name: str,
    ) -> UnifiSensorEntityDescription:
        return UnifiSensorEntityDescription[Devices, Device](
            key=f"Device {name} temperature",
            device_class=SensorDeviceClass.TEMPERATURE,
            entity_category=EntityCategory.DIAGNOSTIC,
            state_class=SensorStateClass.MEASUREMENT,
            native_unit_of_measurement=UnitOfTemperature.CELSIUS,
            entity_registry_enabled_default=False,
            api_handler_fn=lambda api: api.devices,
            available_fn=async_device_available_fn,
            device_info_fn=async_device_device_info_fn,
            name_fn=lambda device: f"{device.name} {name} Temperature",
            object_fn=lambda api, obj_id: api.devices[obj_id],
            supported_fn=partial(async_device_temperatures_supported_fn, name),
            unique_id_fn=lambda hub, obj_id: f"temperature-{slugify(name)}-{obj_id}",
            value_fn=partial(async_device_temperatures_value_fn, name),
        )

    return tuple(
        make_device_temperature_entity_description(name)
        for name in (
            "CPU",
            "Local",
            "PHY",
        )
    )


@dataclass(frozen=True, kw_only=True)
class UnifiSensorEntityDescription(
    SensorEntityDescription, UnifiEntityDescription[HandlerT, ApiItemT]
):
    """Class describing UniFi sensor entity."""

    value_fn: Callable[[UnifiHub, ApiItemT], datetime | float | str | None]

    # Optional
    is_connected_fn: Callable[[UnifiHub, str], bool] | None = None
    """Calculate if source is connected."""
    value_changed_fn: Callable[
        [StateType | date | datetime | Decimal, datetime | float | str | None],
        bool,
    ] = lambda old, new: old != new
    """Calculate whether a state change should be recorded."""


ENTITY_DESCRIPTIONS: tuple[UnifiSensorEntityDescription, ...] = (
    UnifiSensorEntityDescription[Clients, Client](
        key="Bandwidth sensor RX",
        translation_key="client_bandwidth_rx",
        device_class=SensorDeviceClass.DATA_RATE,
        entity_category=EntityCategory.DIAGNOSTIC,
        state_class=SensorStateClass.MEASUREMENT,
        native_unit_of_measurement=UnitOfDataRate.MEGABYTES_PER_SECOND,
        allowed_fn=async_bandwidth_sensor_allowed_fn,
        api_handler_fn=lambda api: api.clients,
        device_info_fn=async_client_device_info_fn,
        is_connected_fn=async_client_is_connected_fn,
        name_fn=lambda _: "RX",
        object_fn=lambda api, obj_id: api.clients[obj_id],
        supported_fn=lambda hub, _: hub.config.option_allow_bandwidth_sensors,
        unique_id_fn=lambda hub, obj_id: f"rx-{obj_id}",
        value_fn=async_client_rx_value_fn,
    ),
    UnifiSensorEntityDescription[Clients, Client](
        key="Bandwidth sensor TX",
        translation_key="client_bandwidth_tx",
        device_class=SensorDeviceClass.DATA_RATE,
        entity_category=EntityCategory.DIAGNOSTIC,
        state_class=SensorStateClass.MEASUREMENT,
        native_unit_of_measurement=UnitOfDataRate.MEGABYTES_PER_SECOND,
        allowed_fn=async_bandwidth_sensor_allowed_fn,
        api_handler_fn=lambda api: api.clients,
        device_info_fn=async_client_device_info_fn,
        is_connected_fn=async_client_is_connected_fn,
        name_fn=lambda _: "TX",
        object_fn=lambda api, obj_id: api.clients[obj_id],
        supported_fn=lambda hub, _: hub.config.option_allow_bandwidth_sensors,
        unique_id_fn=lambda hub, obj_id: f"tx-{obj_id}",
        value_fn=async_client_tx_value_fn,
    ),
    UnifiSensorEntityDescription[Ports, Port](
        key="PoE port power sensor",
        device_class=SensorDeviceClass.POWER,
        entity_category=EntityCategory.DIAGNOSTIC,
        state_class=SensorStateClass.MEASUREMENT,
        native_unit_of_measurement=UnitOfPower.WATT,
        entity_registry_enabled_default=False,
        api_handler_fn=lambda api: api.ports,
        available_fn=async_device_available_fn,
        device_info_fn=async_device_device_info_fn,
        name_fn=lambda port: f"{port.name} PoE Power",
        object_fn=lambda api, obj_id: api.ports[obj_id],
        supported_fn=lambda hub, obj_id: bool(hub.api.ports[obj_id].port_poe),
        unique_id_fn=lambda hub, obj_id: f"poe_power-{obj_id}",
        value_fn=lambda _, obj: obj.poe_power if obj.poe_mode != "off" else "0",
    ),
    UnifiSensorEntityDescription[Ports, Port](
        key="Port Bandwidth sensor RX",
        translation_key="port_bandwidth_rx",
        device_class=SensorDeviceClass.DATA_RATE,
        entity_category=EntityCategory.DIAGNOSTIC,
        entity_registry_enabled_default=False,
        state_class=SensorStateClass.MEASUREMENT,
        native_unit_of_measurement=UnitOfDataRate.BYTES_PER_SECOND,
        suggested_unit_of_measurement=UnitOfDataRate.MEGABITS_PER_SECOND,
        allowed_fn=lambda hub, _: hub.config.option_allow_bandwidth_sensors,
        api_handler_fn=lambda api: api.ports,
        available_fn=async_device_available_fn,
        device_info_fn=async_device_device_info_fn,
        name_fn=lambda port: f"{port.name} RX",
        object_fn=lambda api, obj_id: api.ports[obj_id],
        unique_id_fn=lambda hub, obj_id: f"port_rx-{obj_id}",
        value_fn=lambda hub, port: port.rx_bytes_r,
    ),
    UnifiSensorEntityDescription[Ports, Port](
        key="Port Bandwidth sensor TX",
        translation_key="port_bandwidth_tx",
        device_class=SensorDeviceClass.DATA_RATE,
        entity_category=EntityCategory.DIAGNOSTIC,
        entity_registry_enabled_default=False,
        state_class=SensorStateClass.MEASUREMENT,
        native_unit_of_measurement=UnitOfDataRate.BYTES_PER_SECOND,
        suggested_unit_of_measurement=UnitOfDataRate.MEGABITS_PER_SECOND,
        allowed_fn=lambda hub, _: hub.config.option_allow_bandwidth_sensors,
        api_handler_fn=lambda api: api.ports,
        available_fn=async_device_available_fn,
        device_info_fn=async_device_device_info_fn,
        name_fn=lambda port: f"{port.name} TX",
        object_fn=lambda api, obj_id: api.ports[obj_id],
        unique_id_fn=lambda hub, obj_id: f"port_tx-{obj_id}",
        value_fn=lambda hub, port: port.tx_bytes_r,
    ),
    UnifiSensorEntityDescription[Clients, Client](
        key="Client uptime",
        device_class=SensorDeviceClass.TIMESTAMP,
        entity_category=EntityCategory.DIAGNOSTIC,
        entity_registry_enabled_default=False,
        allowed_fn=async_uptime_sensor_allowed_fn,
        api_handler_fn=lambda api: api.clients,
        device_info_fn=async_client_device_info_fn,
        name_fn=lambda client: "Uptime",
        object_fn=lambda api, obj_id: api.clients[obj_id],
        supported_fn=lambda hub, _: hub.config.option_allow_uptime_sensors,
        unique_id_fn=lambda hub, obj_id: f"uptime-{obj_id}",
        value_fn=async_client_uptime_value_fn,
        value_changed_fn=async_uptime_value_changed_fn,
    ),
    UnifiSensorEntityDescription[Wlans, Wlan](
        key="WLAN clients",
        translation_key="wlan_clients",
        entity_category=EntityCategory.DIAGNOSTIC,
        state_class=SensorStateClass.MEASUREMENT,
        api_handler_fn=lambda api: api.wlans,
        available_fn=async_wlan_available_fn,
        device_info_fn=async_wlan_device_info_fn,
        object_fn=lambda api, obj_id: api.wlans[obj_id],
        should_poll=True,
        unique_id_fn=lambda hub, obj_id: f"wlan_clients-{obj_id}",
        value_fn=async_wlan_client_value_fn,
    ),
    UnifiSensorEntityDescription[Devices, Device](
        key="Device clients",
        translation_key="device_clients",
        entity_category=EntityCategory.DIAGNOSTIC,
        state_class=SensorStateClass.MEASUREMENT,
        entity_registry_enabled_default=False,
        api_handler_fn=lambda api: api.devices,
        available_fn=async_device_available_fn,
        device_info_fn=async_device_device_info_fn,
        name_fn=lambda device: "Clients",
        object_fn=lambda api, obj_id: api.devices[obj_id],
        should_poll=True,
        unique_id_fn=lambda hub, obj_id: f"device_clients-{obj_id}",
        value_fn=async_device_clients_value_fn,
    ),
    UnifiSensorEntityDescription[Outlets, Outlet](
        key="Outlet power metering",
        device_class=SensorDeviceClass.POWER,
        entity_category=EntityCategory.DIAGNOSTIC,
        state_class=SensorStateClass.MEASUREMENT,
        native_unit_of_measurement=UnitOfPower.WATT,
        api_handler_fn=lambda api: api.outlets,
        available_fn=async_device_available_fn,
        device_info_fn=async_device_device_info_fn,
        name_fn=lambda outlet: f"{outlet.name} Outlet Power",
        object_fn=lambda api, obj_id: api.outlets[obj_id],
        should_poll=True,
        supported_fn=async_device_outlet_power_supported_fn,
        unique_id_fn=lambda hub, obj_id: f"outlet_power-{obj_id}",
        value_fn=lambda _, obj: obj.power if obj.relay_state else "0",
    ),
    UnifiSensorEntityDescription[Devices, Device](
        key="SmartPower AC power budget",
        device_class=SensorDeviceClass.POWER,
        entity_category=EntityCategory.DIAGNOSTIC,
        state_class=SensorStateClass.MEASUREMENT,
        native_unit_of_measurement=UnitOfPower.WATT,
        suggested_display_precision=1,
        api_handler_fn=lambda api: api.devices,
        available_fn=async_device_available_fn,
        device_info_fn=async_device_device_info_fn,
        name_fn=lambda device: "AC Power Budget",
        object_fn=lambda api, obj_id: api.devices[obj_id],
        supported_fn=async_device_outlet_supported_fn,
        unique_id_fn=lambda hub, obj_id: f"ac_power_budget-{obj_id}",
        value_fn=lambda hub, device: device.outlet_ac_power_budget,
    ),
    UnifiSensorEntityDescription[Devices, Device](
        key="SmartPower AC power consumption",
        device_class=SensorDeviceClass.POWER,
        entity_category=EntityCategory.DIAGNOSTIC,
        state_class=SensorStateClass.MEASUREMENT,
        native_unit_of_measurement=UnitOfPower.WATT,
        suggested_display_precision=1,
        api_handler_fn=lambda api: api.devices,
        available_fn=async_device_available_fn,
        device_info_fn=async_device_device_info_fn,
        name_fn=lambda device: "AC Power Consumption",
        object_fn=lambda api, obj_id: api.devices[obj_id],
        supported_fn=async_device_outlet_supported_fn,
        unique_id_fn=lambda hub, obj_id: f"ac_power_conumption-{obj_id}",
        value_fn=lambda hub, device: device.outlet_ac_power_consumption,
    ),
    UnifiSensorEntityDescription[Devices, Device](
        key="Device uptime",
        device_class=SensorDeviceClass.TIMESTAMP,
        entity_category=EntityCategory.DIAGNOSTIC,
        api_handler_fn=lambda api: api.devices,
        available_fn=async_device_available_fn,
        device_info_fn=async_device_device_info_fn,
        name_fn=lambda device: "Uptime",
        object_fn=lambda api, obj_id: api.devices[obj_id],
        unique_id_fn=lambda hub, obj_id: f"device_uptime-{obj_id}",
        value_fn=async_device_uptime_value_fn,
        value_changed_fn=async_uptime_value_changed_fn,
    ),
    UnifiSensorEntityDescription[Devices, Device](
        key="Device temperature",
        device_class=SensorDeviceClass.TEMPERATURE,
        entity_category=EntityCategory.DIAGNOSTIC,
        native_unit_of_measurement=UnitOfTemperature.CELSIUS,
        api_handler_fn=lambda api: api.devices,
        available_fn=async_device_available_fn,
        device_info_fn=async_device_device_info_fn,
        name_fn=lambda device: "Temperature",
        object_fn=lambda api, obj_id: api.devices[obj_id],
        supported_fn=lambda hub, obj_id: hub.api.devices[obj_id].has_temperature,
        unique_id_fn=lambda hub, obj_id: f"device_temperature-{obj_id}",
        value_fn=lambda hub, device: device.general_temperature,
    ),
    UnifiSensorEntityDescription[Devices, Device](
        key="Device Uplink MAC",
        translation_key="device_uplink_mac",
        entity_category=EntityCategory.DIAGNOSTIC,
        api_handler_fn=lambda api: api.devices,
        available_fn=async_device_available_fn,
        device_info_fn=async_device_device_info_fn,
        name_fn=lambda device: "Uplink MAC",
        object_fn=lambda api, obj_id: api.devices[obj_id],
        unique_id_fn=lambda hub, obj_id: f"device_uplink_mac-{obj_id}",
        supported_fn=async_device_uplink_mac_supported_fn,
        value_fn=lambda hub, device: device.raw.get("uplink", {}).get("uplink_mac"),
        is_connected_fn=lambda hub, obj_id: hub.api.devices[obj_id].state == 1,
    ),
    UnifiSensorEntityDescription[Devices, Device](
        key="Device State",
        translation_key="device_state",
        device_class=SensorDeviceClass.ENUM,
        entity_category=EntityCategory.DIAGNOSTIC,
        api_handler_fn=lambda api: api.devices,
        available_fn=async_device_available_fn,
        device_info_fn=async_device_device_info_fn,
        name_fn=lambda device: "State",
        object_fn=lambda api, obj_id: api.devices[obj_id],
        unique_id_fn=lambda hub, obj_id: f"device_state-{obj_id}",
        value_fn=async_device_state_value_fn,
        options=list(DEVICE_STATES.values()),
    ),
    UnifiSensorEntityDescription[Devices, Device](
        key="Device CPU utilization",
        translation_key="device_cpu_utilization",
        entity_category=EntityCategory.DIAGNOSTIC,
        native_unit_of_measurement=PERCENTAGE,
        state_class=SensorStateClass.MEASUREMENT,
        api_handler_fn=lambda api: api.devices,
        available_fn=async_device_available_fn,
        device_info_fn=async_device_device_info_fn,
        name_fn=lambda device: "CPU utilization",
        object_fn=lambda api, obj_id: api.devices[obj_id],
        supported_fn=partial(device_system_stats_supported_fn, 0),
        unique_id_fn=lambda hub, obj_id: f"cpu_utilization-{obj_id}",
        value_fn=lambda hub, device: device.system_stats[0],
    ),
    UnifiSensorEntityDescription[Devices, Device](
        key="Device memory utilization",
        translation_key="device_memory_utilization",
        entity_category=EntityCategory.DIAGNOSTIC,
        native_unit_of_measurement=PERCENTAGE,
        state_class=SensorStateClass.MEASUREMENT,
        api_handler_fn=lambda api: api.devices,
        available_fn=async_device_available_fn,
        device_info_fn=async_device_device_info_fn,
        name_fn=lambda device: "Memory utilization",
        object_fn=lambda api, obj_id: api.devices[obj_id],
        supported_fn=partial(device_system_stats_supported_fn, 1),
        unique_id_fn=lambda hub, obj_id: f"memory_utilization-{obj_id}",
        value_fn=lambda hub, device: device.system_stats[1],
    ),
)

ENTITY_DESCRIPTIONS += make_wan_latency_sensors() + make_device_temperatur_sensors()


async def async_setup_entry(
    hass: HomeAssistant,
    config_entry: UnifiConfigEntry,
    async_add_entities: AddConfigEntryEntitiesCallback,
) -> None:
    """Set up sensors for UniFi Network integration."""
    config_entry.runtime_data.entity_loader.register_platform(
        async_add_entities, UnifiSensorEntity, ENTITY_DESCRIPTIONS
    )


class UnifiSensorEntity(UnifiEntity[HandlerT, ApiItemT], SensorEntity):
    """Base representation of a UniFi sensor."""

    entity_description: UnifiSensorEntityDescription[HandlerT, ApiItemT]

    @callback
    def _make_disconnected(self, *_: core_Event) -> None:
        """No heart beat by device.

        Set sensor as unavailable when client device is disconnected
        """
        if self._attr_available:
            self._attr_available = False
            self.async_write_ha_state()

    @callback
    def async_update_state(self, event: ItemEvent, obj_id: str) -> None:
        """Update entity state.

        Update native_value.
        """
        description = self.entity_description
        obj = description.object_fn(self.api, self._obj_id)
        # Update the value only if value is considered to have changed relative to its previous state
        if description.value_changed_fn(
            self.native_value, (value := description.value_fn(self.hub, obj))
        ):
            self._attr_native_value = value

        if description.is_connected_fn is not None:
            # Send heartbeat if client is connected
            if description.is_connected_fn(self.hub, self._obj_id):
                self.hub.update_heartbeat(
                    self._attr_unique_id,
                    dt_util.utcnow() + self.hub.config.option_detection_time,
                )

    async def async_added_to_hass(self) -> None:
        """Register callbacks."""
        await super().async_added_to_hass()

        if self.entity_description.is_connected_fn is not None:
            # Register callback for missed heartbeat
            self.async_on_remove(
                async_dispatcher_connect(
                    self.hass,
                    f"{self.hub.signal_heartbeat_missed}_{self.unique_id}",
                    self._make_disconnected,
                )
            )

    async def async_will_remove_from_hass(self) -> None:
        """Disconnect object when removed."""
        await super().async_will_remove_from_hass()

        if self.entity_description.is_connected_fn is not None:
            # Remove heartbeat registration
            self.hub.remove_heartbeat(self._attr_unique_id)