Throw an error if there's no data, so that the agent can react approp… (#47)

* Throw an error if there's no data, so that the agent can react appropriately

* raise error instead of assert

src/surf_spot_finder/tools/openmeteo.py

@@ -69,6 +69,8 @@ def get_wave_forecast(lat: float, lon: float, date: str | None = None) -> list[d
     if date is not None:
         date = datetime.fromisoformat(date)
         hourly_data = _filter_by_date(date, hourly_data)
+    if len(hourly_data) == 0:
+        raise ValueError("No data found for the given date")
     return hourly_data
 
 
@@ -110,4 +112,6 @@ def get_wind_forecast(lat: float, lon: float, date: str | None = None) -> list[d
     if date is not None:
         date = datetime.fromisoformat(date)
         hourly_data = _filter_by_date(date, hourly_data)
+    if len(hourly_data) == 0:
+        raise ValueError("No data found for the given date")
     return hourly_data