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   1 /**
   2  * Copyright (c) 2010-2023 Contributors to the openHAB project
   3  *
   4  * See the NOTICE file(s) distributed with this work for additional
   5  * information.
   6  *
   7  * This program and the accompanying materials are made available under the
   8  * terms of the Eclipse Public License 2.0 which is available at
   9  * http://www.eclipse.org/legal/epl-2.0
  10  *
  11  * SPDX-License-Identifier: EPL-2.0
  12  */
  13 package org.openhab.binding.energidataservice.internal.handler;
  14
  15 import static org.openhab.binding.energidataservice.internal.EnergiDataServiceBindingConstants.*;
  16 import static org.openhab.core.types.TimeSeries.Policy.REPLACE;
  17
  18 import java.math.BigDecimal;
  19 import java.time.Duration;
  20 import java.time.Instant;
  21 import java.time.LocalDateTime;
  22 import java.time.LocalTime;
  23 import java.time.format.DateTimeFormatter;
  24 import java.time.temporal.ChronoUnit;
  25 import java.util.Arrays;
  26 import java.util.Collection;
  27 import java.util.Currency;
  28 import java.util.HashMap;
  29 import java.util.List;
  30 import java.util.Map;
  31 import java.util.Map.Entry;
  32 import java.util.Set;
  33 import java.util.concurrent.ScheduledFuture;
  34 import java.util.concurrent.TimeUnit;
  35
  36 import javax.measure.Unit;
  37
  38 import org.eclipse.jdt.annotation.NonNullByDefault;
  39 import org.eclipse.jdt.annotation.Nullable;
  40 import org.eclipse.jetty.client.HttpClient;
  41 import org.eclipse.jetty.http.HttpStatus;
  42 import org.openhab.binding.energidataservice.internal.ApiController;
  43 import org.openhab.binding.energidataservice.internal.CacheManager;
  44 import org.openhab.binding.energidataservice.internal.DatahubTariff;
  45 import org.openhab.binding.energidataservice.internal.action.EnergiDataServiceActions;
  46 import org.openhab.binding.energidataservice.internal.api.ChargeType;
  47 import org.openhab.binding.energidataservice.internal.api.ChargeTypeCode;
  48 import org.openhab.binding.energidataservice.internal.api.DatahubTariffFilter;
  49 import org.openhab.binding.energidataservice.internal.api.DatahubTariffFilterFactory;
  50 import org.openhab.binding.energidataservice.internal.api.DateQueryParameter;
  51 import org.openhab.binding.energidataservice.internal.api.DateQueryParameterType;
  52 import org.openhab.binding.energidataservice.internal.api.GlobalLocationNumber;
  53 import org.openhab.binding.energidataservice.internal.api.dto.DatahubPricelistRecord;
  54 import org.openhab.binding.energidataservice.internal.api.dto.ElspotpriceRecord;
  55 import org.openhab.binding.energidataservice.internal.config.DatahubPriceConfiguration;
  56 import org.openhab.binding.energidataservice.internal.config.EnergiDataServiceConfiguration;
  57 import org.openhab.binding.energidataservice.internal.exception.DataServiceException;
  58 import org.openhab.binding.energidataservice.internal.retry.RetryPolicyFactory;
  59 import org.openhab.binding.energidataservice.internal.retry.RetryStrategy;
  60 import org.openhab.core.i18n.TimeZoneProvider;
  61 import org.openhab.core.library.types.DecimalType;
  62 import org.openhab.core.library.types.QuantityType;
  63 import org.openhab.core.library.types.StringType;
  64 import org.openhab.core.library.unit.CurrencyUnits;
  65 import org.openhab.core.thing.Channel;
  66 import org.openhab.core.thing.ChannelUID;
  67 import org.openhab.core.thing.Thing;
  68 import org.openhab.core.thing.ThingStatus;
  69 import org.openhab.core.thing.ThingStatusDetail;
  70 import org.openhab.core.thing.binding.BaseThingHandler;
  71 import org.openhab.core.thing.binding.ThingHandlerService;
  72 import org.openhab.core.types.Command;
  73 import org.openhab.core.types.RefreshType;
  74 import org.openhab.core.types.State;
  75 import org.openhab.core.types.TimeSeries;
  76 import org.openhab.core.types.UnDefType;
  77 import org.slf4j.Logger;
  78 import org.slf4j.LoggerFactory;
  79
  80 import com.google.gson.Gson;
  81
  82 /**
  83  * The {@link EnergiDataServiceHandler} is responsible for handling commands, which are
  84  * sent to one of the channels.
  85  *
  86  * @author Jacob Laursen - Initial contribution
  87  */
  88 @NonNullByDefault
  89 public class EnergiDataServiceHandler extends BaseThingHandler {
  90
  91     private final Logger logger = LoggerFactory.getLogger(EnergiDataServiceHandler.class);
  92     private final TimeZoneProvider timeZoneProvider;
  93     private final ApiController apiController;
  94     private final CacheManager cacheManager;
  95     private final Gson gson = new Gson();
  96
  97     private EnergiDataServiceConfiguration config;
  98     private RetryStrategy retryPolicy = RetryPolicyFactory.initial();
  99     private @Nullable ScheduledFuture<?> refreshFuture;
 100     private @Nullable ScheduledFuture<?> priceUpdateFuture;
 101
 102     private record Price(String hourStart, BigDecimal spotPrice, String spotPriceCurrency,
 103             @Nullable BigDecimal gridTariff, @Nullable BigDecimal systemTariff,
 104             @Nullable BigDecimal transmissionGridTariff, @Nullable BigDecimal electricityTax,
 105             @Nullable BigDecimal reducedElectricityTax) {
 106     }
 107
 108     public EnergiDataServiceHandler(Thing thing, HttpClient httpClient, TimeZoneProvider timeZoneProvider) {
 109         super(thing);
 110         this.timeZoneProvider = timeZoneProvider;
 111         this.apiController = new ApiController(httpClient, timeZoneProvider);
 112         this.cacheManager = new CacheManager();
 113
 114         // Default configuration
 115         this.config = new EnergiDataServiceConfiguration();
 116     }
 117
 118     @Override
 119     public void handleCommand(ChannelUID channelUID, Command command) {
 120         if (!(command instanceof RefreshType)) {
 121             return;
 122         }
 123
 124         if (ELECTRICITY_CHANNELS.contains(channelUID.getId())) {
 125             refreshElectricityPrices();
 126         }
 127     }
 128
 129     @Override
 130     public void initialize() {
 131         config = getConfigAs(EnergiDataServiceConfiguration.class);
 132
 133         if (config.priceArea.isBlank()) {
 134             updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.OFFLINE.CONFIGURATION_ERROR,
 135                     "@text/offline.conf-error.no-price-area");
 136             return;
 137         }
 138         GlobalLocationNumber gln = config.getGridCompanyGLN();
 139         if (!gln.isEmpty() && !gln.isValid()) {
 140             updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.OFFLINE.CONFIGURATION_ERROR,
 141                     "@text/offline.conf-error.invalid-grid-company-gln");
 142             return;
 143         }
 144         gln = config.getEnerginetGLN();
 145         if (!gln.isEmpty() && !gln.isValid()) {
 146             updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.OFFLINE.CONFIGURATION_ERROR,
 147                     "@text/offline.conf-error.invalid-energinet-gln");
 148             return;
 149         }
 150
 151         updateStatus(ThingStatus.UNKNOWN);
 152
 153         refreshFuture = scheduler.schedule(this::refreshElectricityPrices, 0, TimeUnit.SECONDS);
 154     }
 155
 156     @Override
 157     public void dispose() {
 158         ScheduledFuture<?> refreshFuture = this.refreshFuture;
 159         if (refreshFuture != null) {
 160             refreshFuture.cancel(true);
 161             this.refreshFuture = null;
 162         }
 163         ScheduledFuture<?> priceUpdateFuture = this.priceUpdateFuture;
 164         if (priceUpdateFuture != null) {
 165             priceUpdateFuture.cancel(true);
 166             this.priceUpdateFuture = null;
 167         }
 168
 169         cacheManager.clear();
 170     }
 171
 172     @Override
 173     public Collection<Class<? extends ThingHandlerService>> getServices() {
 174         return Set.of(EnergiDataServiceActions.class);
 175     }
 176
 177     private void refreshElectricityPrices() {
 178         RetryStrategy retryPolicy;
 179         try {
 180             if (isLinked(CHANNEL_SPOT_PRICE) || isLinked(CHANNEL_HOURLY_PRICES)) {
 181                 downloadSpotPrices();
 182             }
 183
 184             for (DatahubTariff datahubTariff : DatahubTariff.values()) {
 185                 if (isLinked(datahubTariff.getChannelId()) || isLinked(CHANNEL_HOURLY_PRICES)) {
 186                     downloadTariffs(datahubTariff);
 187                 }
 188             }
 189
 190             updateStatus(ThingStatus.ONLINE);
 191             updatePrices();
 192             updateTimeSeries();
 193
 194             if (isLinked(CHANNEL_SPOT_PRICE) || isLinked(CHANNEL_HOURLY_PRICES)) {
 195                 if (cacheManager.getNumberOfFutureSpotPrices() < 13) {
 196                     retryPolicy = RetryPolicyFactory.whenExpectedSpotPriceDataMissing(DAILY_REFRESH_TIME_CET,
 197                             NORD_POOL_TIMEZONE);
 198                 } else {
 199                     retryPolicy = RetryPolicyFactory.atFixedTime(DAILY_REFRESH_TIME_CET, NORD_POOL_TIMEZONE);
 200                 }
 201             } else {
 202                 retryPolicy = RetryPolicyFactory.atFixedTime(LocalTime.MIDNIGHT, timeZoneProvider.getTimeZone());
 203             }
 204         } catch (DataServiceException e) {
 205             if (e.getHttpStatus() != 0) {
 206                 updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.OFFLINE.COMMUNICATION_ERROR,
 207                         HttpStatus.getCode(e.getHttpStatus()).getMessage());
 208             } else {
 209                 updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.OFFLINE.COMMUNICATION_ERROR, e.getMessage());
 210             }
 211             if (e.getCause() != null) {
 212                 logger.debug("Error retrieving prices", e);
 213             }
 214             retryPolicy = RetryPolicyFactory.fromThrowable(e);
 215         } catch (InterruptedException e) {
 216             logger.debug("Refresh job interrupted");
 217             Thread.currentThread().interrupt();
 218             return;
 219         }
 220
 221         rescheduleRefreshJob(retryPolicy);
 222     }
 223
 224     private void downloadSpotPrices() throws InterruptedException, DataServiceException {
 225         if (cacheManager.areSpotPricesFullyCached()) {
 226             logger.debug("Cached spot prices still valid, skipping download.");
 227             return;
 228         }
 229         DateQueryParameter start;
 230         if (cacheManager.areHistoricSpotPricesCached()) {
 231             start = DateQueryParameter.of(DateQueryParameterType.UTC_NOW);
 232         } else {
 233             start = DateQueryParameter.of(DateQueryParameterType.UTC_NOW,
 234                     Duration.ofHours(-CacheManager.NUMBER_OF_HISTORIC_HOURS));
 235         }
 236         Map<String, String> properties = editProperties();
 237         ElspotpriceRecord[] spotPriceRecords = apiController.getSpotPrices(config.priceArea, config.getCurrency(),
 238                 start, properties);
 239         cacheManager.putSpotPrices(spotPriceRecords, config.getCurrency());
 240         updateProperties(properties);
 241     }
 242
 243     private void downloadTariffs(DatahubTariff datahubTariff) throws InterruptedException, DataServiceException {
 244         GlobalLocationNumber globalLocationNumber = switch (datahubTariff) {
 245             case GRID_TARIFF -> config.getGridCompanyGLN();
 246             default -> config.getEnerginetGLN();
 247         };
 248         if (globalLocationNumber.isEmpty()) {
 249             return;
 250         }
 251         if (cacheManager.areTariffsValidTomorrow(datahubTariff)) {
 252             logger.debug("Cached tariffs of type {} still valid, skipping download.", datahubTariff);
 253             cacheManager.updateTariffs(datahubTariff);
 254         } else {
 255             DatahubTariffFilter filter = switch (datahubTariff) {
 256                 case GRID_TARIFF -> getGridTariffFilter();
 257                 case SYSTEM_TARIFF -> DatahubTariffFilterFactory.getSystemTariff();
 258                 case TRANSMISSION_GRID_TARIFF -> DatahubTariffFilterFactory.getTransmissionGridTariff();
 259                 case ELECTRICITY_TAX -> DatahubTariffFilterFactory.getElectricityTax();
 260                 case REDUCED_ELECTRICITY_TAX -> DatahubTariffFilterFactory.getReducedElectricityTax();
 261             };
 262             cacheManager.putTariffs(datahubTariff, downloadPriceLists(globalLocationNumber, filter));
 263         }
 264     }
 265
 266     private Collection<DatahubPricelistRecord> downloadPriceLists(GlobalLocationNumber globalLocationNumber,
 267             DatahubTariffFilter filter) throws InterruptedException, DataServiceException {
 268         Map<String, String> properties = editProperties();
 269         Collection<DatahubPricelistRecord> records = apiController.getDatahubPriceLists(globalLocationNumber,
 270                 ChargeType.Tariff, filter, properties);
 271         updateProperties(properties);
 272
 273         return records;
 274     }
 275
 276     private DatahubTariffFilter getGridTariffFilter() {
 277         Channel channel = getThing().getChannel(CHANNEL_GRID_TARIFF);
 278         if (channel == null) {
 279             return DatahubTariffFilterFactory.getGridTariffByGLN(config.gridCompanyGLN);
 280         }
 281
 282         DatahubPriceConfiguration datahubPriceConfiguration = channel.getConfiguration()
 283                 .as(DatahubPriceConfiguration.class);
 284
 285         if (!datahubPriceConfiguration.hasAnyFilterOverrides()) {
 286             return DatahubTariffFilterFactory.getGridTariffByGLN(config.gridCompanyGLN);
 287         }
 288
 289         DateQueryParameter start = datahubPriceConfiguration.getStart();
 290         if (start == null) {
 291             logger.warn("Invalid channel configuration parameter 'start' or 'offset': {} (offset: {})",
 292                     datahubPriceConfiguration.start, datahubPriceConfiguration.offset);
 293             return DatahubTariffFilterFactory.getGridTariffByGLN(config.gridCompanyGLN);
 294         }
 295
 296         Set<ChargeTypeCode> chargeTypeCodes = datahubPriceConfiguration.getChargeTypeCodes();
 297         Set<String> notes = datahubPriceConfiguration.getNotes();
 298         DatahubTariffFilter filter;
 299         if (!chargeTypeCodes.isEmpty() || !notes.isEmpty()) {
 300             // Completely override filter.
 301             filter = new DatahubTariffFilter(chargeTypeCodes, notes, start);
 302         } else {
 303             // Only override start date in pre-configured filter.
 304             filter = new DatahubTariffFilter(DatahubTariffFilterFactory.getGridTariffByGLN(config.gridCompanyGLN),
 305                     start);
 306         }
 307
 308         return new DatahubTariffFilter(filter, DateQueryParameter.of(filter.getDateQueryParameter(),
 309                 Duration.ofHours(-CacheManager.NUMBER_OF_HISTORIC_HOURS)));
 310     }
 311
 312     private void updatePrices() {
 313         cacheManager.cleanup();
 314
 315         updateCurrentSpotPrice();
 316         Arrays.stream(DatahubTariff.values())
 317                 .forEach(tariff -> updateCurrentTariff(tariff.getChannelId(), cacheManager.getTariff(tariff)));
 318         updateHourlyPrices();
 319
 320         reschedulePriceUpdateJob();
 321     }
 322
 323     private void updateCurrentSpotPrice() {
 324         if (!isLinked(CHANNEL_SPOT_PRICE)) {
 325             return;
 326         }
 327         BigDecimal spotPrice = cacheManager.getSpotPrice();
 328         updatePriceState(CHANNEL_SPOT_PRICE, spotPrice, config.getCurrency());
 329     }
 330
 331     private void updateCurrentTariff(String channelId, @Nullable BigDecimal tariff) {
 332         if (!isLinked(channelId)) {
 333             return;
 334         }
 335         updatePriceState(channelId, tariff, CURRENCY_DKK);
 336     }
 337
 338     private void updatePriceState(String channelID, @Nullable BigDecimal price, Currency currency) {
 339         updateState(channelID, price != null ? getEnergyPrice(price, currency) : UnDefType.UNDEF);
 340     }
 341
 342     private State getEnergyPrice(BigDecimal price, Currency currency) {
 343         Unit<?> unit = CurrencyUnits.getInstance().getUnit(currency.getCurrencyCode());
 344         if (unit == null) {
 345             logger.trace("Currency {} is unknown, falling back to DecimalType", currency.getCurrencyCode());
 346             return new DecimalType(price);
 347         }
 348         try {
 349             String currencyUnit = unit.getSymbol();
 350             if (currencyUnit == null) {
 351                 currencyUnit = unit.getName();
 352             }
 353             return new QuantityType<>(price + " " + currencyUnit + "/kWh");
 354         } catch (IllegalArgumentException e) {
 355             logger.debug("Unable to create QuantityType, falling back to DecimalType", e);
 356             return new DecimalType(price);
 357         }
 358     }
 359
 360     private void updateHourlyPrices() {
 361         if (!isLinked(CHANNEL_HOURLY_PRICES)) {
 362             return;
 363         }
 364         Map<Instant, BigDecimal> spotPriceMap = cacheManager.getSpotPrices();
 365         Price[] targetPrices = new Price[spotPriceMap.size()];
 366         List<Entry<Instant, BigDecimal>> sourcePrices = spotPriceMap.entrySet().stream()
 367                 .sorted(Map.Entry.comparingByKey()).toList();
 368
 369         int i = 0;
 370         for (Entry<Instant, BigDecimal> sourcePrice : sourcePrices) {
 371             Instant hourStart = sourcePrice.getKey();
 372             BigDecimal gridTariff = cacheManager.getTariff(DatahubTariff.GRID_TARIFF, hourStart);
 373             BigDecimal systemTariff = cacheManager.getTariff(DatahubTariff.SYSTEM_TARIFF, hourStart);
 374             BigDecimal transmissionGridTariff = cacheManager.getTariff(DatahubTariff.TRANSMISSION_GRID_TARIFF,
 375                     hourStart);
 376             BigDecimal electricityTax = cacheManager.getTariff(DatahubTariff.ELECTRICITY_TAX, hourStart);
 377             BigDecimal reducedElectricityTax = cacheManager.getTariff(DatahubTariff.REDUCED_ELECTRICITY_TAX, hourStart);
 378             targetPrices[i++] = new Price(hourStart.toString(), sourcePrice.getValue(), config.currencyCode, gridTariff,
 379                     systemTariff, electricityTax, reducedElectricityTax, transmissionGridTariff);
 380         }
 381         updateState(CHANNEL_HOURLY_PRICES, new StringType(gson.toJson(targetPrices)));
 382     }
 383
 384     private void updateTimeSeries() {
 385         TimeSeries spotPriceTimeSeries = new TimeSeries(REPLACE);
 386         Map<DatahubTariff, TimeSeries> datahubTimeSeriesMap = new HashMap<>();
 387         for (DatahubTariff datahubTariff : DatahubTariff.values()) {
 388             datahubTimeSeriesMap.put(datahubTariff, new TimeSeries(REPLACE));
 389         }
 390
 391         Map<Instant, BigDecimal> spotPriceMap = cacheManager.getSpotPrices();
 392         List<Entry<Instant, BigDecimal>> spotPrices = spotPriceMap.entrySet().stream()
 393                 .sorted(Map.Entry.comparingByKey()).toList();
 394         for (Entry<Instant, BigDecimal> spotPrice : spotPrices) {
 395             Instant hourStart = spotPrice.getKey();
 396             if (isLinked(CHANNEL_SPOT_PRICE)) {
 397                 spotPriceTimeSeries.add(hourStart, getEnergyPrice(spotPrice.getValue(), config.getCurrency()));
 398             }
 399             for (Map.Entry<DatahubTariff, TimeSeries> entry : datahubTimeSeriesMap.entrySet()) {
 400                 DatahubTariff datahubTariff = entry.getKey();
 401                 String channelId = datahubTariff.getChannelId();
 402                 if (!isLinked(channelId)) {
 403                     continue;
 404                 }
 405                 BigDecimal tariff = cacheManager.getTariff(datahubTariff, hourStart);
 406                 if (tariff != null) {
 407                     TimeSeries timeSeries = entry.getValue();
 408                     timeSeries.add(hourStart, getEnergyPrice(tariff, CURRENCY_DKK));
 409                 }
 410             }
 411         }
 412         if (spotPriceTimeSeries.size() > 0) {
 413             sendTimeSeries(CHANNEL_SPOT_PRICE, spotPriceTimeSeries);
 414         }
 415         for (Map.Entry<DatahubTariff, TimeSeries> entry : datahubTimeSeriesMap.entrySet()) {
 416             DatahubTariff datahubTariff = entry.getKey();
 417             String channelId = datahubTariff.getChannelId();
 418             if (!isLinked(channelId)) {
 419                 continue;
 420             }
 421             TimeSeries timeSeries = entry.getValue();
 422             if (timeSeries.size() > 0) {
 423                 sendTimeSeries(channelId, timeSeries);
 424             }
 425         }
 426     }
 427
 428     /**
 429      * Get the configured {@link Currency} for spot prices.
 430      *
 431      * @return Spot price currency
 432      */
 433     public Currency getCurrency() {
 434         return config.getCurrency();
 435     }
 436
 437     /**
 438      * Get cached spot prices or try once to download them if not cached
 439      * (usually if no items are linked).
 440      *
 441      * @return Map of future spot prices
 442      */
 443     public Map<Instant, BigDecimal> getSpotPrices() {
 444         try {
 445             downloadSpotPrices();
 446         } catch (DataServiceException e) {
 447             if (logger.isDebugEnabled()) {
 448                 logger.warn("Error retrieving spot prices", e);
 449             } else {
 450                 logger.warn("Error retrieving spot prices: {}", e.getMessage());
 451             }
 452         } catch (InterruptedException e) {
 453             Thread.currentThread().interrupt();
 454         }
 455
 456         return cacheManager.getSpotPrices();
 457     }
 458
 459     /**
 460      * Return cached tariffs or try once to download them if not cached
 461      * (usually if no items are linked).
 462      *
 463      * @return Map of future tariffs
 464      */
 465     public Map<Instant, BigDecimal> getTariffs(DatahubTariff datahubTariff) {
 466         try {
 467             downloadTariffs(datahubTariff);
 468         } catch (DataServiceException e) {
 469             if (logger.isDebugEnabled()) {
 470                 logger.warn("Error retrieving tariffs", e);
 471             } else {
 472                 logger.warn("Error retrieving tariffs of type {}: {}", datahubTariff, e.getMessage());
 473             }
 474         } catch (InterruptedException e) {
 475             Thread.currentThread().interrupt();
 476         }
 477
 478         return cacheManager.getTariffs(datahubTariff);
 479     }
 480
 481     /**
 482      * Return whether reduced electricity tax is set in configuration.
 483      *
 484      * @return true if reduced electricity tax applies
 485      */
 486     public boolean isReducedElectricityTax() {
 487         return config.reducedElectricityTax;
 488     }
 489
 490     private void reschedulePriceUpdateJob() {
 491         ScheduledFuture<?> priceUpdateJob = this.priceUpdateFuture;
 492         if (priceUpdateJob != null) {
 493             // Do not interrupt ourselves.
 494             priceUpdateJob.cancel(false);
 495             this.priceUpdateFuture = null;
 496         }
 497
 498         Instant now = Instant.now();
 499         long millisUntilNextClockHour = Duration
 500                 .between(now, now.plus(1, ChronoUnit.HOURS).truncatedTo(ChronoUnit.HOURS)).toMillis() + 1;
 501         this.priceUpdateFuture = scheduler.schedule(this::updatePrices, millisUntilNextClockHour,
 502                 TimeUnit.MILLISECONDS);
 503         logger.debug("Price update job rescheduled in {} milliseconds", millisUntilNextClockHour);
 504     }
 505
 506     private void rescheduleRefreshJob(RetryStrategy retryPolicy) {
 507         // Preserve state of previous retry policy when configuration is the same.
 508         if (!retryPolicy.equals(this.retryPolicy)) {
 509             this.retryPolicy = retryPolicy;
 510         }
 511
 512         ScheduledFuture<?> refreshJob = this.refreshFuture;
 513
 514         long secondsUntilNextRefresh = this.retryPolicy.getDuration().getSeconds();
 515         Instant timeOfNextRefresh = Instant.now().plusSeconds(secondsUntilNextRefresh);
 516         this.refreshFuture = scheduler.schedule(this::refreshElectricityPrices, secondsUntilNextRefresh,
 517                 TimeUnit.SECONDS);
 518         logger.debug("Refresh job rescheduled in {} seconds: {}", secondsUntilNextRefresh, timeOfNextRefresh);
 519         DateTimeFormatter formatter = DateTimeFormatter.ofPattern(PROPERTY_DATETIME_FORMAT);
 520         updateProperty(PROPERTY_NEXT_CALL, LocalDateTime.ofInstant(timeOfNextRefresh, timeZoneProvider.getTimeZone())
 521                 .truncatedTo(ChronoUnit.SECONDS).format(formatter));
 522
 523         if (refreshJob != null) {
 524             refreshJob.cancel(true);
 525         }
 526     }
 527 }