Reduced nesting in the code.

twitchio/ext/routines/__init__.py

@@ -333,22 +333,15 @@ def start_time(self) -> Optional[datetime.datetime]:
     @property
     def next_run(self) -> Optional[datetime.datetime]:
         """Calculate and return the next run time of the routine."""
+        now = datetime.datetime.now(datetime.timezone.utc)
+
         if self._time:
-            # If _time is set, calculate the next occurrence
             next_run = self._time + datetime.timedelta(days=self._completed_loops)
+            if next_run < now:
+                next_run += datetime.timedelta(days=1)
         elif self._delta:
-            # If _delta is set, calculate the next run based on the last start time and delta
             next_run = self._start_time + datetime.timedelta(seconds=self._delta * (self._completed_loops + 1))
-        else:
-            # If neither _time nor _delta is set, return None
-            return None
-
-        # Ensure that the next run time is not in the past
-        now = datetime.datetime.now(datetime.timezone.utc)
-        if next_run < now:
-            if self._time:
-                next_run = next_run + datetime.timedelta(days=1)
-            else:
+            if next_run < now:
                 next_run = now + datetime.timedelta(seconds=self._delta)
 
         return next_run