[shelly] Fix timeDuration handling in DTOs (#17689)

Signed-off-by: Jan N. Klug <github@klug.nrw>

bundles/org.openhab.binding.shelly/src/main/java/org/openhab/binding/shelly/internal/api2/Shelly2ApiClient.java

@@ -605,12 +605,12 @@ public class Shelly2ApiClient extends ShellyHttpClient {
         return channelUpdate ? ShellyComponents.updateDimmers(getThing(), status) : false;
     }
 
-    protected @Nullable Integer getDuration(@Nullable Double timerStartedAt, @Nullable Integer timerDuration) {
+    protected @Nullable Integer getDuration(@Nullable Double timerStartedAt, @Nullable Double timerDuration) {
         if (timerStartedAt == null || timerDuration == null) {
             return null;
         }
-        int duration = (int) (now() - timerStartedAt.longValue());
-        return duration <= timerDuration ? timerDuration - duration : 0;
+        double duration = now() - timerStartedAt;
+        return duration <= timerDuration ? (int) (timerDuration - duration) : 0;
     }
 
     // Addon

bundles/org.openhab.binding.shelly/src/main/java/org/openhab/binding/shelly/internal/api2/Shelly2ApiJsonDTO.java

@@ -580,7 +580,7 @@ public class Shelly2ApiJsonDTO {
             @SerializedName("timer_started_at")
             public Double timerStartedAt;
             @SerializedName("timer_duration")
-            public Integer timerDuration;
+            public Double timerDuration;
         }
 
         public static class Shelly2DeviceStatusResult {
@@ -882,7 +882,7 @@ public class Shelly2ApiJsonDTO {
         @SerializedName("timer_started_at")
         public Double timerStartetAt;
         @SerializedName("timer_duration")
-        public Integer timerDuration;
+        public Double timerDuration;
         public Double apower;
         public Double voltage;
         public Double current;

bundles/org.openhab.binding.shelly/src/main/java/org/openhab/binding/shelly/internal/handler/ShellyBaseHandler.java

@@ -120,7 +120,7 @@ public abstract class ShellyBaseHandler extends BaseThingHandler
     private String lastWakeupReason = "";
 
     // Scheduler
-    private long watchdog = now();
+    private double watchdog = now();
     protected int scheduledUpdates = 0;
     private int skipCount = UPDATE_SKIP_COUNT;
     private int skipUpdate = 0;
@@ -724,9 +724,9 @@ public abstract class ShellyBaseHandler extends BaseThingHandler
     }
 
     private boolean isWatchdogExpired() {
-        long delta = now() - watchdog;
+        double delta = now() - watchdog;
         if ((watchdog > 0) && (delta > profile.updatePeriod)) {
-            stats.remainingWatchdog = delta;
+            stats.remainingWatchdog = (long) delta;
             return true;
         }
         return false;
@@ -761,7 +761,7 @@ public abstract class ShellyBaseHandler extends BaseThingHandler
             stats.timeoutErrors = api.getTimeoutErrors();
             stats.timeoutsRecorvered = api.getTimeoutsRecovered();
         }
-        stats.remainingWatchdog = watchdog > 0 ? now() - watchdog : 0;
+        stats.remainingWatchdog = watchdog > 0 ? (long) (now() - watchdog) : 0;
 
         // Check various device indicators like overheating
         if (checkRestarted(status)) {
@@ -855,7 +855,7 @@ public abstract class ShellyBaseHandler extends BaseThingHandler
                     triggerChannel(channelId, event);
                     cache.updateChannel(channelId, getStringType(event.toUpperCase()));
                     stats.lastAlarm = event;
-                    stats.lastAlarmTs = now();
+                    stats.lastAlarmTs = (long) now();
                     stats.alarms++;
             }
         }

bundles/org.openhab.binding.shelly/src/main/java/org/openhab/binding/shelly/internal/util/ShellyUtils.java

@@ -27,6 +27,7 @@ import java.time.LocalDateTime;
 import java.time.ZoneId;
 import java.time.ZonedDateTime;
 import java.time.format.DateTimeFormatter;
+import java.time.temporal.ChronoUnit;
 
 import javax.measure.Unit;
 
@@ -290,12 +291,12 @@ public class ShellyUtils {
         }
     }
 
-    public static Long now() {
-        return System.currentTimeMillis() / 1000L;
+    public static double now() {
+        return System.currentTimeMillis() / 1000.0;
     }
 
     public static DateTimeType getTimestamp() {
-        return new DateTimeType(ZonedDateTime.ofInstant(Instant.ofEpochSecond(now()), ZoneId.systemDefault()));
+        return new DateTimeType(ZonedDateTime.now().truncatedTo(ChronoUnit.SECONDS));
     }
 
     public static DateTimeType getTimestamp(String zone, long timestamp) {