circle.py

"""Plugwise Circle node class."""

from __future__ import annotations

from asyncio import Task, create_task
from collections.abc import Awaitable, Callable
from dataclasses import replace
from datetime import UTC, datetime, timedelta
from functools import wraps
import logging
from typing import Any, Final, TypeVar, cast

from ..api import (
    EnergyStatistics,
    NodeEvent,
    NodeFeature,
    NodeInfo,
    NodeInfoMessage,
    NodeType,
    PowerStatistics,
    RelayConfig,
    RelayLock,
    RelayState,
)
from ..connection import StickController
from ..constants import (
    DAY_IN_HOURS,
    DEFAULT_CONS_INTERVAL,
    MAX_TIME_DRIFT,
    MINIMAL_POWER_UPDATE,
    NO_PRODUCTION_INTERVAL,
    PULSES_PER_KW_SECOND,
    SECOND_IN_NANOSECONDS,
)
from ..exceptions import FeatureError, MessageError, NodeError
from ..messages.requests import (
    CircleClockGetRequest,
    CircleClockSetRequest,
    CircleEnergyLogsRequest,
    CircleMeasureIntervalRequest,
    CirclePowerUsageRequest,
    CircleRelayInitStateRequest,
    CircleRelaySwitchRequest,
    EnergyCalibrationRequest,
    NodeInfoRequest,
)
from ..messages.responses import NodeInfoResponse, NodeResponseType
from .helpers import EnergyCalibration, raise_not_loaded
from .helpers.counter import EnergyCounters
from .helpers.firmware import CIRCLE_FIRMWARE_SUPPORT
from .helpers.pulses import PulseLogRecord, calc_log_address
from .node import PlugwiseBaseNode

CACHE_CALIBRATION_GAIN_A = "calibration_gain_a"
CACHE_CALIBRATION_GAIN_B = "calibration_gain_b"
CACHE_CALIBRATION_NOISE = "calibration_noise"
CACHE_CALIBRATION_TOT = "calibration_tot"
CACHE_ENERGY_COLLECTION = "energy_collection"
CACHE_RELAY = "relay"
CACHE_RELAY_INIT = "relay_init"
CACHE_RELAY_LOCK = "relay_lock"

CIRCLE_FEATURES: Final = (
    NodeFeature.CIRCLE,
    NodeFeature.RELAY,
    NodeFeature.RELAY_INIT,
    NodeFeature.RELAY_LOCK,
    NodeFeature.ENERGY,
    NodeFeature.POWER,
)


# Default firmware if not known
DEFAULT_FIRMWARE: Final = datetime(2008, 8, 26, 15, 46, tzinfo=UTC)

FuncT = TypeVar("FuncT", bound=Callable[..., Any])
_LOGGER = logging.getLogger(__name__)


def raise_calibration_missing(func: FuncT) -> FuncT:
    """Validate energy calibration settings are available."""

    @wraps(func)
    def decorated(*args: Any, **kwargs: Any) -> Any:
        if args[0].calibrated is None:
            raise NodeError("Energy calibration settings are missing")
        return func(*args, **kwargs)

    return cast(FuncT, decorated)


class PlugwiseCircle(PlugwiseBaseNode):
    """Plugwise Circle node."""

    def __init__(
        self,
        mac: str,
        node_type: NodeType,
        controller: StickController,
        loaded_callback: Callable[[NodeEvent, str], Awaitable[None]],
    ):
        """Initialize base class for Sleeping End Device."""
        super().__init__(mac, node_type, controller, loaded_callback)

        # Relay
        self._relay_lock: RelayLock = RelayLock()
        self._relay_state: RelayState = RelayState()
        self._relay_config: RelayConfig = RelayConfig()

        # Power
        self._power: PowerStatistics = PowerStatistics()
        self._calibration: EnergyCalibration | None = None

        # Energy
        self._energy_counters = EnergyCounters(mac)
        self._retrieve_energy_logs_task: None | Task[None] = None
        self._last_energy_log_requested: bool = False
        self._last_collected_energy_timestamp: datetime | None = None

        self._group_member: list[int] = []

    # region Properties

    @property
    def calibrated(self) -> bool:
        """State of calibration."""
        if self._calibration is not None:
            return True
        return False

    @property
    def energy(self) -> EnergyStatistics:
        """Energy statistics."""
        return self._energy_counters.energy_statistics

    @property
    @raise_not_loaded
    def energy_consumption_interval(self) -> int | None:
        """Interval (minutes) energy consumption counters are locally logged at Circle devices."""
        if NodeFeature.ENERGY not in self._features:
            raise NodeError(f"Energy log interval is not supported for node {self.mac}")
        return self._energy_counters.consumption_interval

    @property
    def energy_production_interval(self) -> int | None:
        """Interval (minutes) energy production counters are locally logged at Circle devices."""
        if NodeFeature.ENERGY not in self._features:
            raise NodeError(f"Energy log interval is not supported for node {self.mac}")
        return self._energy_counters.production_interval

    @property
    @raise_not_loaded
    def power(self) -> PowerStatistics:
        """Power statistics."""
        return self._power

    @property
    @raise_not_loaded
    def relay(self) -> bool:
        """Current value of relay."""
        return bool(self._relay_state.state)

    @property
    @raise_not_loaded
    def relay_config(self) -> RelayConfig:
        """Configuration state of relay."""
        if NodeFeature.RELAY_INIT not in self._features:
            raise FeatureError(
                f"Configuration of relay is not supported for device {self.name}"
            )
        return self._relay_config

    @property
    @raise_not_loaded
    def relay_state(self) -> RelayState:
        """State of relay."""
        return self._relay_state

    @raise_not_loaded
    async def relay_off(self) -> None:
        """Switch relay off."""
        await self.set_relay(False)

    @raise_not_loaded
    async def relay_on(self) -> None:
        """Switch relay on."""
        await self.set_relay(True)

    @raise_not_loaded
    async def relay_init_off(self) -> None:
        """Switch relay off."""
        await self._relay_init_set(False)

    @raise_not_loaded
    async def relay_init_on(self) -> None:
        """Switch relay on."""
        await self._relay_init_set(True)

    @property
    def relay_lock(self) -> RelayLock:
        """State of the relay lock."""
        return self._relay_lock

    # endregion

    async def calibration_update(self) -> bool:
        """Retrieve and update calibration settings. Returns True if successful."""
        _LOGGER.debug(
            "Start updating energy calibration for %s",
            self._mac_in_str,
        )
        request = EnergyCalibrationRequest(self._send, self._mac_in_bytes)
        if (calibration_response := await request.send()) is None:
            _LOGGER.warning(
                "Retrieving energy calibration information for %s failed",
                self.name,
            )
            await self._available_update_state(False)
            return False
        await self._available_update_state(True, calibration_response.timestamp)
        await self._calibration_update_state(
            calibration_response.gain_a,
            calibration_response.gain_b,
            calibration_response.off_noise,
            calibration_response.off_tot,
        )
        _LOGGER.debug(
            "Updating energy calibration for %s succeeded",
            self._mac_in_str,
        )
        return True

    async def _calibration_load_from_cache(self) -> bool:
        """Load calibration settings from cache."""
        cal_gain_a: float | None = None
        cal_gain_b: float | None = None
        cal_noise: float | None = None
        cal_tot: float | None = None
        if (gain_a := self._get_cache(CACHE_CALIBRATION_GAIN_A)) is not None:
            cal_gain_a = float(gain_a)
        if (gain_b := self._get_cache(CACHE_CALIBRATION_GAIN_B)) is not None:
            cal_gain_b = float(gain_b)
        if (noise := self._get_cache(CACHE_CALIBRATION_NOISE)) is not None:
            cal_noise = float(noise)
        if (tot := self._get_cache(CACHE_CALIBRATION_TOT)) is not None:
            cal_tot = float(tot)

        # Restore calibration
        result = await self._calibration_update_state(
            cal_gain_a,
            cal_gain_b,
            cal_noise,
            cal_tot,
            load_from_cache=True,
        )
        if result:
            _LOGGER.debug(
                "Restore calibration settings from cache for %s was successful",
                self._mac_in_str,
            )
            return True
        _LOGGER.info(
            "Failed to restore calibration settings from cache for %s", self.name
        )
        return False

    async def _calibration_update_state(
        self,
        gain_a: float | None,
        gain_b: float | None,
        off_noise: float | None,
        off_tot: float | None,
        load_from_cache: bool = False,
    ) -> bool:
        """Process new energy calibration settings. Returns True if successful."""
        if gain_a is None or gain_b is None or off_noise is None or off_tot is None:
            return False
        self._calibration = EnergyCalibration(
            gain_a=gain_a, gain_b=gain_b, off_noise=off_noise, off_tot=off_tot
        )
        # Forward calibration config to energy collection
        self._energy_counters.calibration = self._calibration
        if self._cache_enabled and not load_from_cache:
            self._set_cache(CACHE_CALIBRATION_GAIN_A, gain_a)
            self._set_cache(CACHE_CALIBRATION_GAIN_B, gain_b)
            self._set_cache(CACHE_CALIBRATION_NOISE, off_noise)
            self._set_cache(CACHE_CALIBRATION_TOT, off_tot)
            await self.save_cache()
        return True

    @raise_calibration_missing
    async def power_update(self) -> PowerStatistics | None:
        """Update the current power usage statistics.

        Return power usage or None if retrieval failed
        """
        # Debounce power
        if self.skip_update(self._power, MINIMAL_POWER_UPDATE):
            return self._power

        request = CirclePowerUsageRequest(self._send, self._mac_in_bytes)
        response = await request.send()
        if response is None or response.timestamp is None:
            _LOGGER.debug(
                "No response for async_power_update() for %s", self._mac_in_str
            )
            await self._available_update_state(False)
            return None
        await self._available_update_state(True, response.timestamp)

        # Update power stats
        self._power.last_second = self._calc_watts(
            response.pulse_1s, 1, response.offset
        )
        self._power.last_8_seconds = self._calc_watts(
            response.pulse_8s, 8, response.offset
        )
        self._power.timestamp = response.timestamp
        await self.publish_feature_update_to_subscribers(NodeFeature.POWER, self._power)

        # Forward pulse interval counters to pulse Collection
        self._energy_counters.add_pulse_stats(
            response.consumed_counter,
            response.produced_counter,
            response.timestamp,
        )
        await self.publish_feature_update_to_subscribers(
            NodeFeature.ENERGY, self._energy_counters.energy_statistics
        )
        return self._power

    def _log_no_energy_stats_update(self) -> None:
        """Return log-message based on conditions."""
        if (
            self._initialization_delay_expired is not None
            and datetime.now(tz=UTC) < self._initialization_delay_expired
        ):
            _LOGGER.info(
                "Unable to return energy statistics for %s during initialization, because it is not responding",
                self.name,
            )
        else:
            _LOGGER.warning(
                "Unable to return energy statistics for %s, because it is not responding",
                self.name,
            )

    @raise_not_loaded
    @raise_calibration_missing
    async def energy_update(self) -> EnergyStatistics | None:  # noqa: PLR0911 PLR0912
        """Return updated energy usage statistics."""
        if self._current_log_address is None:
            _LOGGER.debug(
                "Unable to update energy logs for node %s because the current log address is unknown.",
                self._mac_in_str,
            )
            if await self.node_info_update() is None:
                self._log_no_energy_stats_update()
                return None
        # Request node info update every 30 minutes.
        elif not self.skip_update(self._node_info, 1800):
            if await self.node_info_update() is None:
                self._log_no_energy_stats_update()
                return None

        # Always request last energy log records at initial startup
        if not self._last_energy_log_requested:
            self._last_energy_log_requested = await self.energy_log_update(
                self._current_log_address
            )

        if self._energy_counters.log_rollover:
            # Try updating node_info to collect the updated energy log address
            if await self.node_info_update() is None:
                _LOGGER.debug(
                    "async_energy_update | %s | Log rollover | node_info_update failed",
                    self._mac_in_str,
                )
                return None

            # Try collecting energy-stats for _current_log_address
            result = await self.energy_log_update(self._current_log_address)
            if not result:
                _LOGGER.debug(
                    "async_energy_update | %s | Log rollover | energy_log_update failed",
                    self._mac_in_str,
                )
                return None

            if self._current_log_address is not None:
                # Retry with previous log address as Circle node pointer to self._current_log_address
                # could be rolled over while the last log is at previous address/slot
                _prev_log_address, _ = calc_log_address(
                    self._current_log_address, 1, -4
                )
                result = await self.energy_log_update(_prev_log_address)
                if not result:
                    _LOGGER.debug(
                        "async_energy_update | %s | Log rollover | energy_log_update %s failed",
                        self._mac_in_str,
                        _prev_log_address,
                    )
                    return None

        if (
            missing_addresses := self._energy_counters.log_addresses_missing
        ) is not None:
            if len(missing_addresses) == 0:
                await self.power_update()
                _LOGGER.debug(
                    "async_energy_update for %s | no missing log records",
                    self._mac_in_str,
                )
                return self._energy_counters.energy_statistics

            if len(missing_addresses) == 1:
                result = await self.energy_log_update(missing_addresses[0])
                if result:
                    await self.power_update()
                    _LOGGER.debug(
                        "async_energy_update for %s | single energy log is missing | %s",
                        self._mac_in_str,
                        missing_addresses,
                    )
                    return self._energy_counters.energy_statistics

        # Create task to request remaining missing logs
        if (
            self._retrieve_energy_logs_task is None
            or self._retrieve_energy_logs_task.done()
        ):
            _LOGGER.debug(
                "Create task to update energy logs for node %s",
                self._mac_in_str,
            )
            self._retrieve_energy_logs_task = create_task(
                self.get_missing_energy_logs()
            )

        if (
            self._initialization_delay_expired is not None
            and datetime.now(tz=UTC) < self._initialization_delay_expired
        ):
            _LOGGER.info(
                "Unable to return energy statistics for %s during initialization, collecting required data...",
                self.name,
            )
        else:
            _LOGGER.warning(
                "Unable to return energy statistics for %s, collecting required data...",
                self.name,
            )
        return None

    async def _get_initial_energy_logs(self) -> None:
        """Collect initial energy logs from the last 10 log addresses."""
        if self._current_log_address is None:
            return

        _LOGGER.debug(
            "Start collecting initial energy logs from the last 10 log addresses for node %s.",
            self._mac_in_str,
        )
        total_addresses = 11
        log_address = self._current_log_address
        while total_addresses > 0:
            result = await self.energy_log_update(log_address)
            if not result:
                # Handle case with None-data in all address slots
                _LOGGER.debug(
                    "All slots at log address %s are empty or outdated – stopping initial collection",
                    log_address,
                )
                break

            log_address, _ = calc_log_address(log_address, 1, -4)
            total_addresses -= 1

        if self._cache_enabled:
            await self._energy_log_records_save_to_cache()

    async def get_missing_energy_logs(self) -> None:
        """Task to retrieve missing energy logs."""
        self._energy_counters.update()
        if self._current_log_address is None:
            return

        if (missing_addresses := self._energy_counters.log_addresses_missing) is None:
            await self._get_initial_energy_logs()
            return

        _LOGGER.debug("Task created to get missing logs of %s", self._mac_in_str)
        _LOGGER.debug(
            "Task Request %s missing energy logs for node %s | %s",
            str(len(missing_addresses)),
            self._mac_in_str,
            str(missing_addresses),
        )
        missing_addresses = sorted(missing_addresses, reverse=True)
        tasks = [
            create_task(self.energy_log_update(address))
            for address in missing_addresses
        ]
        for task in tasks:
            await task

        if self._cache_enabled:
            await self._energy_log_records_save_to_cache()

    async def energy_log_update(self, address: int | None) -> bool:
        """Request energy logs and return True only when at least one recent, non-empty record was stored; otherwise return False."""
        any_record_stored = False
        if address is None:
            return False

        _LOGGER.debug(
            "Requesting EnergyLogs from node %s address %s",
            self._mac_in_str,
            address,
        )
        request = CircleEnergyLogsRequest(self._send, self._mac_in_bytes, address)
        if (response := await request.send()) is None:
            _LOGGER.debug(
                "Retrieving EnergyLogs data from node %s failed",
                self._mac_in_str,
            )
            return False

        _LOGGER.debug("EnergyLogs from node %s, address=%s:", self._mac_in_str, address)
        await self._available_update_state(True, response.timestamp)

        # Forward historical energy log information to energy counters
        # Each response message contains 4 log counters (slots) of the
        # energy pulses collected during the previous hour of given timestamp
        last_energy_timestamp_collected = False
        for _slot in range(4, 0, -1):
            log_timestamp, log_pulses = response.log_data[_slot]
            _LOGGER.debug(
                "In slot=%s: pulses=%s, timestamp=%s", _slot, log_pulses, log_timestamp
            )
            if (
                log_timestamp is None
                or log_pulses is None
                # Don't store an old log-record, store am empty record instead
                or not self._check_timestamp_is_recent(address, _slot, log_timestamp)
            ):
                self._energy_counters.add_empty_log(response.log_address, _slot)
                continue

            if await self._energy_log_record_update_state(
                response.log_address,
                _slot,
                log_timestamp.replace(tzinfo=UTC),
                log_pulses,
                import_only=True,
            ):
                any_record_stored = True
                if not last_energy_timestamp_collected:
                    # Collect the timestamp of the most recent response
                    self._last_collected_energy_timestamp = log_timestamp.replace(
                        tzinfo=UTC
                    )
                    _LOGGER.debug(
                        "Setting last_collected_energy_timestamp to %s",
                        self._last_collected_energy_timestamp,
                    )
                    last_energy_timestamp_collected = True

        self._energy_counters.update()
        if any_record_stored:
            _LOGGER.debug(
                "Saving energy record update to cache for %s", self._mac_in_str
            )
            await self.save_cache()

        return any_record_stored

    def _check_timestamp_is_recent(
        self, address: int, slot: int, timestamp: datetime
    ) -> bool:
        """Check if the timestamp of the received log-record is recent.

        A timestamp from within the last 24 hours is considered recent.
        """
        age_seconds = (
            datetime.now(tz=UTC) - timestamp.replace(tzinfo=UTC)
        ).total_seconds()
        if age_seconds > DAY_IN_HOURS * 3600:
            _LOGGER.warning(
                "EnergyLog from Node %s | address %s | slot %s | timestamp %s is outdated, ignoring...",
                self._mac_in_str,
                address,
                slot,
                timestamp,
            )
            return False
        return True

    async def _energy_log_records_load_from_cache(self) -> bool:  # noqa: PLR0912
        """Load energy_log_record from cache."""
        if (cache_data := self._get_cache(CACHE_ENERGY_COLLECTION)) is None:
            _LOGGER.warning(
                "Failed to restore energy log records from cache for node %s", self.name
            )
            return False
        restored_logs: dict[int, dict[int, tuple[datetime, int]]] = {}
        if cache_data == "":
            _LOGGER.debug("Cache-record is empty")
            return False

        log_data = cache_data.split("|")
        for log_record in log_data:
            log_fields = log_record.split(":")
            if len(log_fields) == 4:
                timestamp_energy_log = log_fields[2].split("-")
                if len(timestamp_energy_log) == 6:
                    address = int(log_fields[0])
                    slot = int(log_fields[1])
                    pulses = int(log_fields[3])
                    timestamp = datetime(
                        year=int(timestamp_energy_log[0]),
                        month=int(timestamp_energy_log[1]),
                        day=int(timestamp_energy_log[2]),
                        hour=int(timestamp_energy_log[3]),
                        minute=int(timestamp_energy_log[4]),
                        second=int(timestamp_energy_log[5]),
                        tzinfo=UTC,
                    )
                    if restored_logs.get(address) is None:
                        restored_logs[address] = {}
                    restored_logs[address][slot] = (timestamp, pulses)

        # Sort and prune the records loaded from cache
        sorted_logs: dict[int, dict[int, tuple[datetime, int]]] = {}
        skip_before = datetime.now(tz=UTC) - timedelta(hours=DAY_IN_HOURS)
        sorted_addresses = sorted(restored_logs.keys(), reverse=True)
        for address in sorted_addresses:
            sorted_slots = sorted(restored_logs[address].keys(), reverse=True)
            for slot in sorted_slots:
                if restored_logs[address][slot][0] > skip_before:
                    if sorted_logs.get(address) is None:
                        sorted_logs[address] = {}
                    sorted_logs[address][slot] = restored_logs[address][slot]

        for address, data in sorted_logs.items():
            for slot, pulse_data in data.items():
                self._energy_counters.add_pulse_log(
                    address=address,
                    slot=slot,
                    pulses=pulse_data[1],
                    timestamp=pulse_data[0],
                    import_only=True,
                )

        self._energy_counters.update()

        # Create task to retrieve remaining (missing) logs
        if self._energy_counters.log_addresses_missing is None:
            _LOGGER.debug("Cache | missing log addresses is None")
            return False

        if len(self._energy_counters.log_addresses_missing) > 0:
            if self._retrieve_energy_logs_task is not None:
                if not self._retrieve_energy_logs_task.done():
                    await self._retrieve_energy_logs_task
            self._retrieve_energy_logs_task = create_task(
                self.get_missing_energy_logs()
            )
            _LOGGER.debug("Cache | creating tasks to obtain missing energy logs")
            return False

        return True

    async def _energy_log_records_save_to_cache(self) -> None:
        """Save currently collected energy logs to cached file."""
        if not self._cache_enabled:
            return

        logs: dict[int, dict[int, PulseLogRecord]] = (
            self._energy_counters.get_pulse_logs()
        )
        cached_logs = ""
        # logs is already sorted in reverse
        for address, record in logs.items():
            for slot in record:
                log = record[slot]
                if cached_logs != "":
                    cached_logs += "|"
                cached_logs += f"{address}:{slot}:{log.timestamp.year}"
                cached_logs += f"-{log.timestamp.month}-{log.timestamp.day}"
                cached_logs += f"-{log.timestamp.hour}-{log.timestamp.minute}"
                cached_logs += f"-{log.timestamp.second}:{log.pulses}"

        _LOGGER.debug("Saving energy logrecords to cache for %s", self._mac_in_str)
        self._set_cache(CACHE_ENERGY_COLLECTION, cached_logs)

    async def _energy_log_record_update_state(
        self,
        address: int,
        slot: int,
        timestamp: datetime,
        pulses: int,
        import_only: bool = False,
    ) -> bool:
        """Process new energy log record. Returns true if record is new or changed."""
        self._energy_counters.add_pulse_log(
            address, slot, timestamp, pulses, import_only=import_only
        )
        if not self._cache_enabled:
            return False

        log_cache_record = f"{address}:{slot}:{timestamp.year}"
        log_cache_record += f"-{timestamp.month}-{timestamp.day}"
        log_cache_record += f"-{timestamp.hour}-{timestamp.minute}"
        log_cache_record += f"-{timestamp.second}:{pulses}"
        if (cached_logs := self._get_cache(CACHE_ENERGY_COLLECTION)) is not None:
            if log_cache_record not in cached_logs:
                _LOGGER.debug(
                    "Adding logrecord (%s, %s) to cache of %s",
                    str(address),
                    str(slot),
                    self._mac_in_str,
                )
                self._set_cache(
                    CACHE_ENERGY_COLLECTION, log_cache_record + "|" + cached_logs
                )
                return True

            _LOGGER.debug(
                "Energy logrecord already present for %s, ignoring", self._mac_in_str
            )
            return False

        _LOGGER.debug(
            "Cache is empty, adding new logrecord (%s, %s) for %s",
            str(address),
            str(slot),
            self._mac_in_str,
        )
        self._set_cache(CACHE_ENERGY_COLLECTION, log_cache_record)
        return True

    @raise_not_loaded
    async def set_relay(self, state: bool) -> bool:
        """Change the state of the relay."""
        if NodeFeature.RELAY not in self._features:
            raise FeatureError(
                f"Changing state of relay is not supported for node {self.mac}"
            )

        if self._relay_lock.state:
            _LOGGER.debug("Relay switch blocked, relay is locked")
            return self._relay_state.state

        _LOGGER.debug("Switching relay to %s", state)
        request = CircleRelaySwitchRequest(self._send, self._mac_in_bytes, state)
        response = await request.send()

        if response is None or response.ack_id == NodeResponseType.RELAY_SWITCH_FAILED:
            raise NodeError(f"Request to switch relay for {self.name} failed")

        if response.ack_id == NodeResponseType.RELAY_SWITCHED_OFF:
            await self._relay_update_state(state=False, timestamp=response.timestamp)
            return False
        if response.ack_id == NodeResponseType.RELAY_SWITCHED_ON:
            await self._relay_update_state(state=True, timestamp=response.timestamp)
            return True

        raise NodeError(
            f"Unexpected NodeResponseType {response.ack_id!r} received "
            + "in response to CircleRelaySwitchRequest for node {self.mac}"
        )

    @raise_not_loaded
    async def set_relay_lock(self, state: bool) -> bool:
        """Set the state of the relay-lock."""
        await self._relay_update_lock(state)
        return state

    async def _relay_load_from_cache(self) -> bool:
        """Load relay state from cache."""
        result = True
        if (cached_relay_data := self._get_cache(CACHE_RELAY)) is not None:
            _LOGGER.debug(
                "Restore relay state from cache for node %s: relay: %s",
                self._mac_in_str,
                cached_relay_data,
            )
            relay_state = cached_relay_data == "True"
            await self._relay_update_state(relay_state)
        else:
            _LOGGER.debug(
                "Failed to restore relay state from cache for node %s, try to request node info...",
                self._mac_in_str,
            )
            if await self.node_info_update() is None:
                result = False

        if (cached_relay_lock := self._get_cache(CACHE_RELAY_LOCK)) is not None:
            _LOGGER.debug(
                "Restore relay_lock state from cache for node %s: relay_lock: %s",
                self._mac_in_str,
                cached_relay_lock,
            )
            relay_lock = cached_relay_lock == "True"
            await self._relay_update_lock(relay_lock, load_from_cache=True)
        else:
            # Set to initial state False when not present in cache
            await self._relay_update_lock(False)

        return result

    async def _relay_update_state(
        self, state: bool, timestamp: datetime | None = None
    ) -> None:
        """Process relay state update."""
        state_update = False
        if state:
            self._set_cache(CACHE_RELAY, "True")
            if self._relay_state.state is None or not self._relay_state.state:
                state_update = True
        else:
            self._set_cache(CACHE_RELAY, "False")
            if self._relay_state.state is None or self._relay_state.state:
                state_update = True

        self._relay_state = replace(self._relay_state, state=state, timestamp=timestamp)
        if state_update:
            await self.publish_feature_update_to_subscribers(
                NodeFeature.RELAY, self._relay_state
            )
            _LOGGER.debug("Saving relay state update to cache for %s", self._mac_in_str)
            await self.save_cache()

    async def _relay_update_lock(
        self, state: bool, load_from_cache: bool = False
    ) -> None:
        """Process relay lock update."""
        state_update = False
        if state:
            self._set_cache(CACHE_RELAY_LOCK, "True")
            if self._relay_lock.state is None or not self._relay_lock.state:
                state_update = True
        else:
            self._set_cache(CACHE_RELAY_LOCK, "False")
            if self._relay_lock.state is None or self._relay_lock.state:
                state_update = True

        if state_update:
            self._relay_lock = replace(self._relay_lock, state=state)
            await self.publish_feature_update_to_subscribers(
                NodeFeature.RELAY_LOCK, self._relay_lock
            )
            if not load_from_cache:
                _LOGGER.debug(
                    "Saving relay lock state update to cache for %s", self._mac_in_str
                )
                await self.save_cache()

    async def clock_synchronize(self) -> bool:
        """Synchronize clock. Returns true if successful."""
        get_clock_request = CircleClockGetRequest(self._send, self._mac_in_bytes)
        clock_response = await get_clock_request.send()
        if clock_response is None or clock_response.timestamp is None:
            return False
        _dt_of_circle = datetime.now(tz=UTC).replace(
            hour=clock_response.time.hour.value,
            minute=clock_response.time.minute.value,
            second=clock_response.time.second.value,
            microsecond=0,
            tzinfo=UTC,
        )
        clock_offset = clock_response.timestamp.replace(microsecond=0) - _dt_of_circle
        if (clock_offset.seconds < MAX_TIME_DRIFT) or (
            clock_offset.seconds > -(MAX_TIME_DRIFT)
        ):
            return True
        _LOGGER.info(
            "Reset clock of node %s because time has drifted %s sec",
            self._mac_in_str,
            str(clock_offset.seconds),
        )
        if self._node_protocols is None:
            raise NodeError(
                "Unable to synchronize clock en when protocol version is unknown"
            )
        set_clock_request = CircleClockSetRequest(
            self._send,
            self._mac_in_bytes,
            datetime.now(tz=UTC),
            self._node_protocols.max,
        )
        if (node_response := await set_clock_request.send()) is None:
            _LOGGER.warning(
                "Failed to (re)set the internal clock of %s",
                self.name,
            )
            return False
        if node_response.ack_id == NodeResponseType.CLOCK_ACCEPTED:
            return True
        return False

    async def load(self) -> None:
        """Load and activate Circle node features."""
        if self._loaded:
            return

        if self._cache_enabled:
            _LOGGER.debug("Loading Circle node %s from cache", self._mac_in_str)
            if await self._load_from_cache():
                self._loaded = True
        if not self._loaded:
            _LOGGER.debug("Retrieving Info For Circle node %s", self._mac_in_str)

            # Check if node is online
            if (
                not self._available
                and not await self.is_online()
                or await self.node_info_update() is None
            ):
                _LOGGER.debug(
                    "Failed to retrieve NodeInfo for %s, loading defaults",
                    self._mac_in_str,
                )
                await self._load_defaults()

        self._loaded = True

        self._setup_protocol(CIRCLE_FIRMWARE_SUPPORT, CIRCLE_FEATURES)
        await self._loaded_callback(NodeEvent.LOADED, self.mac)
        await self.initialize()

    async def _load_from_cache(self) -> bool:
        """Load states from previous cached information. Returns True if successful."""
        result = True
        if not await super()._load_from_cache():
            _LOGGER.debug("_load_from_cache | super-load failed")
            result = False

        # Calibration settings
        if not await self._calibration_load_from_cache():
            _LOGGER.debug(
                "Node %s failed to load calibration from cache", self._mac_in_str
            )
            if result:
                result = False

        # Energy collection
        if not await self._energy_log_records_load_from_cache():
            _LOGGER.warning(
                "Node %s failed to load energy_log_records from cache",
                self._mac_in_str,
            )
            if result:
                result = False

        # Relay
        if not await self._relay_load_from_cache():
            _LOGGER.debug(
                "Node %s failed to load relay state from cache",
                self._mac_in_str,
            )
            if result:
                result = False

        # Relay init config if feature is enabled
        if NodeFeature.RELAY_INIT in self._features:
            if not await self._relay_init_load_from_cache():
                _LOGGER.debug(
                    "Node %s failed to load relay_init state from cache",
                    self._mac_in_str,
                )
            if result:
                result = False

        return result

    async def _load_defaults(self) -> None:
        """Load default configuration settings."""
        if self._node_info.model is None:
            self._node_info.model = "Circle"
        if self._node_info.name is None:
            self._node_info.name = f"Circle {self._node_info.mac[-5:]}"
        if self._node_info.firmware is None:
            self._node_info.firmware = DEFAULT_FIRMWARE

    @raise_not_loaded
    async def initialize(self) -> bool:
        """Initialize node."""
        if self._initialized:
            _LOGGER.debug("Already initialized node %s", self._mac_in_str)
            return True

        if not await self.clock_synchronize():
            _LOGGER.debug(
                "Failed to initialized node %s, failed clock sync", self._mac_in_str
            )
            self._initialized = False
            return False

        if not self._calibration and not await self.calibration_update():
            _LOGGER.debug(
                "Failed to initialized node %s, no calibration", self._mac_in_str
            )
            self._initialized = False
            return False

        if (
            self.skip_update(self._node_info, 30)
            and await self.node_info_update() is None
        ):
            _LOGGER.debug("Failed to retrieve node info for %s", self._mac_in_str)
        if NodeFeature.RELAY_INIT in self._features:
            if (state := await self._relay_init_get()) is not None:
                self._relay_config = replace(self._relay_config, init_state=state)
            else:
                _LOGGER.debug(
                    "Failed to initialized node %s, relay init", self._mac_in_str
                )
                self._initialized = False
                return False

        await super().initialize()
        return True

    async def node_info_update(
        self, node_info: NodeInfoResponse | NodeInfoMessage | None = None
    ) -> NodeInfo | None:
        """Update Node (hardware) information."""
        if node_info is None:
            if self.skip_update(self._node_info, 30):
                return self._node_info

            node_request = NodeInfoRequest(self._send, self._mac_in_bytes)
            node_info = await node_request.send()

        if node_info is None:
            return None

        await super().node_info_update(node_info)
        await self._relay_update_state(
            node_info.relay_state, timestamp=node_info.timestamp
        )
        if self._current_log_address is not None and (
            self._current_log_address > node_info.current_logaddress_pointer
            or self._current_log_address == 1
        ):
            # Rollover of log address
            _LOGGER.debug(
                "Rollover log address from %s into %s for node %s",
                self._current_log_address,
                node_info.current_logaddress_pointer,
                self._mac_in_str,
            )

        if self._current_log_address != node_info.current_logaddress_pointer:
            self._current_log_address = node_info.current_logaddress_pointer

        return self._node_info

    # pylint: disable=too-many-arguments
    async def update_node_details(
        self, node_info: NodeInfoResponse | None = None
    ) -> bool:
        """Process new node info and return true if all fields are updated."""
        if node_info.relay_state is not None:
            self._relay_state = replace(
                self._relay_state,
                state=node_info.relay_state,
                timestamp=node_info.timestamp,
            )

        if node_info.current_logaddress_pointer is not None:
            self._current_log_address = node_info.current_logaddress_pointer

        return await super().update_node_details(node_info)

    async def unload(self) -> None:
        """Deactivate and unload node features."""
        self._loaded = False
        if (
            self._retrieve_energy_logs_task is not None
            and not self._retrieve_energy_logs_task.done()
        ):
            self._retrieve_energy_logs_task.cancel()

        if self._cache_enabled:
            await self._energy_log_records_save_to_cache()

        await super().unload()

    @raise_not_loaded
    async def set_relay_init(self, state: bool) -> bool:
        """Change the initial power-on state of the relay."""
        if NodeFeature.RELAY_INIT not in self._features:
            raise FeatureError(
                f"Configuration of initial power-up relay state is not supported for node {self.mac}"
            )
        await self._relay_init_set(state)
        if self._relay_config.init_state is None:
            raise NodeError("Failed to configure relay init setting")
        return self._relay_config.init_state

    async def _relay_init_get(self) -> bool | None:
        """Get current configuration of the power-up state of the relay. Returns None if retrieval failed."""
        if NodeFeature.RELAY_INIT not in self._features:
            raise NodeError(
                "Retrieval of initial state of relay is not "
                + f"supported for device {self.name}"
            )
        request = CircleRelayInitStateRequest(
            self._send, self._mac_in_bytes, False, False
        )
        if (response := await request.send()) is not None:
            await self._relay_init_update_state(response.relay.value == 1)
            return self._relay_config.init_state
        return None

    async def _relay_init_set(self, state: bool) -> bool | None:
        """Configure relay init state."""
        if NodeFeature.RELAY_INIT not in self._features:
            raise NodeError(
                "Configuring of initial state of relay is not"
                + f"supported for device {self.name}"
            )
        request = CircleRelayInitStateRequest(
            self._send, self._mac_in_bytes, True, state
        )
        if (response := await request.send()) is not None:
            await self._relay_init_update_state(response.relay.value == 1)
            return self._relay_config.init_state
        return None

    async def _relay_init_load_from_cache(self) -> bool:
        """Load relay init state from cache. Returns True if retrieval was successful."""
        if (cached_relay_data := self._get_cache(CACHE_RELAY_INIT)) is not None:
            relay_init_state = False
            if cached_relay_data == "True":
                relay_init_state = True
            await self._relay_init_update_state(relay_init_state)
            return True
        return False

    async def _relay_init_update_state(self, state: bool) -> None:
        """Process relay init state update."""
        state_update = False
        if state:
            self._set_cache(CACHE_RELAY_INIT, "True")
            if (
                self._relay_config.init_state is None
                or not self._relay_config.init_state
            ):
                state_update = True
        if not state:
            self._set_cache(CACHE_RELAY_INIT, "False")
            if self._relay_config.init_state is None or self._relay_config.init_state:
                state_update = True
        if state_update:
            self._relay_config = replace(self._relay_config, init_state=state)
            await self.publish_feature_update_to_subscribers(
                NodeFeature.RELAY_INIT, self._relay_config
            )
            _LOGGER.debug(
                "Saving relay_init state update to cachefor %s", self._mac_in_str
            )
            await self.save_cache()

    @raise_calibration_missing
    def _calc_watts(self, pulses: int, seconds: int, nano_offset: int) -> float | None:
        """Calculate watts based on energy usages."""
        if self._calibration is None:
            return None

        pulses_per_s = self._correct_power_pulses(pulses, nano_offset) / float(seconds)
        negative = False
        if pulses_per_s < 0:
            negative = True
            pulses_per_s = abs(pulses_per_s)

        corrected_pulses = seconds * (
            (
                (
                    ((pulses_per_s + self._calibration.off_noise) ** 2)
                    * self._calibration.gain_b
                )
                + (
                    (pulses_per_s + self._calibration.off_noise)
                    * self._calibration.gain_a
                )
            )
            + self._calibration.off_tot
        )
        if negative:
            corrected_pulses = -corrected_pulses

        return corrected_pulses / PULSES_PER_KW_SECOND / seconds * (1000)

    def _correct_power_pulses(self, pulses: int, offset: int) -> float:
        """Correct pulses based on given measurement time offset (ns)."""
        # Sometimes the circle returns -1 for some of the pulse counters
        # likely this means the circle measures very little power and is
        # suffering from rounding errors. Zero these out. However, negative
        # pulse values are valid for power producing appliances, like
        # solar panels, so don't complain too loudly.
        if pulses == -1:
            _LOGGER.debug(
                "Power pulse counter for node %s of value of -1, corrected to 0",
                self._mac_in_str,
            )
            return 0.0
        if pulses != 0:
            if offset != 0:
                return (
                    pulses * (SECOND_IN_NANOSECONDS + offset)
                ) / SECOND_IN_NANOSECONDS
            return pulses
        return 0.0

    @raise_not_loaded
    async def get_state(self, features: tuple[NodeFeature]) -> dict[NodeFeature, Any]:
        """Update latest state for given feature."""
        states: dict[NodeFeature, Any] = {}
        if not self._available and not await self.is_online():
            _LOGGER.debug(
                "Node %s did not respond, unable to update state", self._mac_in_str
            )
            for feature in features:
                states[feature] = None
            states[NodeFeature.AVAILABLE] = self.available_state
            return states

        for feature in features:
            if feature not in self._features:
                raise NodeError(
                    f"Update of feature '{feature}' is not supported for {self.name}"
                )

        features, states = await self._check_for_energy_and_power_features(
            features, states
        )

        for feature in features:
            match feature:
                case NodeFeature.ENERGY:
                    states[feature] = await self.energy_update()
                    _LOGGER.debug(
                        "async_get_state %s - energy: %s",
                        self._mac_in_str,
                        states[feature],
                    )
                case NodeFeature.RELAY:
                    states[feature] = self._relay_state
                    _LOGGER.debug(
                        "async_get_state %s - relay: %s",
                        self._mac_in_str,
                        states[feature],
                    )
                case NodeFeature.RELAY_LOCK:
                    states[feature] = self._relay_lock
                case NodeFeature.RELAY_INIT:
                    states[feature] = self._relay_config
                case NodeFeature.POWER:
                    states[feature] = await self.power_update()
                    _LOGGER.debug(
                        "async_get_state %s - power: %s",
                        self._mac_in_str,
                        states[feature],
                    )
                case _:
                    state_result = await super().get_state((feature,))
                    states[feature] = state_result[feature]

        if NodeFeature.AVAILABLE not in states:
            states[NodeFeature.AVAILABLE] = self.available_state

        return states

    async def _check_for_energy_and_power_features(
        self, features: tuple[NodeFeature], states: dict[NodeFeature, Any]
    ) -> tuple[tuple[NodeFeature], dict[NodeFeature, Any]]:
        """Check for presence of both NodeFeature.ENERGY and NodeFeature.POWER.

        If both are present, execute the related functions in a specific order
        to assure a proper response to the hourly pulses-rollovers.
        """
        if {NodeFeature.ENERGY, NodeFeature.POWER} <= set(features):
            states[NodeFeature.POWER] = await self.power_update()
            _LOGGER.debug(
                "async_get_state %s - power: %s",
                self._mac_in_str,
                states[NodeFeature.POWER],
            )
            states[NodeFeature.ENERGY] = await self.energy_update()
            _LOGGER.debug(
                "async_get_state %s - energy: %s",
                self._mac_in_str,
                states[NodeFeature.ENERGY],
            )
            return tuple(
                set(features).difference({NodeFeature.ENERGY, NodeFeature.POWER})
            ), states

        return features, states

    async def energy_reset_request(self) -> None:
        """Send an energy-reset to a Node."""
        if self._node_protocols is None:
            raise NodeError("Unable to energy-reset when protocol version is unknown")

        request = CircleClockSetRequest(
            self._send,
            self._mac_in_bytes,
            datetime.now(tz=UTC),
            self._node_protocols.max,
            True,
        )
        if (response := await request.send()) is None:
            raise NodeError(f"Energy-reset for {self._mac_in_str} failed")

        if response.ack_id != NodeResponseType.CLOCK_ACCEPTED:
            raise MessageError(
                f"Unexpected NodeResponseType {response.ack_id!r} received as response to CircleClockSetRequest"
            )

        _LOGGER.warning("Energy reset for Node %s successful", self._mac_in_str)

        # Follow up by an energy-intervals (re)set
        interval_request = CircleMeasureIntervalRequest(
            self._send,
            self._mac_in_bytes,
            DEFAULT_CONS_INTERVAL,
            NO_PRODUCTION_INTERVAL,
        )
        if (interval_response := await interval_request.send()) is None:
            raise NodeError("No response for CircleMeasureIntervalRequest")

        if (
            interval_response.response_type
            != NodeResponseType.POWER_LOG_INTERVAL_ACCEPTED
        ):
            raise MessageError(
                f"Unknown NodeResponseType '{interval_response.response_type.name}' received"
            )
        _LOGGER.warning("Resetting energy intervals to default (= consumption only)")

        # Clear the cached energy_collection
        if self._cache_enabled:
            self._set_cache(CACHE_ENERGY_COLLECTION, "")
            _LOGGER.warning(
                "Energy-collection cache cleared successfully, updating cache for %s",
                self._mac_in_str,
            )
            await self.save_cache()

        # Clear PulseCollection._logs
        self._energy_counters.reset_pulse_collection()
        _LOGGER.warning("Resetting pulse-collection")

        # Request a NodeInfo update
        if await self.node_info_update() is None:
            _LOGGER.warning(
                "Node info update failed after energy-reset for %s",
                self._mac_in_str,
            )
        else:
            _LOGGER.warning(
                "Node info update after energy-reset successful for %s",
                self._mac_in_str,
            )