fix: prewarm pool in background so platform setup returns under 10s

Author: charludo

custom_components/closest_intent/conversation.py

@@ -199,10 +199,15 @@ def _effective_slot_threshold(self) -> int:
 
     async def async_added_to_hass(self) -> None:
         await super().async_added_to_hass()
-        # Pre-warm with HA's configured default language so first user
-        # utterance doesn't pay the build cost.
         default_lang = self.hass.config.language or "en"
-        await self._async_get_pool(default_lang)
+        create_bg_task = getattr(self.hass, "async_create_background_task", None)
+        if create_bg_task is not None:
+            create_bg_task(
+                self._async_get_pool(default_lang),
+                name=f"closest_intent.prewarm[{default_lang}]",
+            )
+        else:  # pragma: no cover - older HA / tests
+            self.hass.async_create_task(self._async_get_pool(default_lang))
 
         bus = self.hass.bus
         for event_name in (

tests/conftest.py

@@ -170,6 +170,24 @@ class _HomeAssistant:
 ha_core.HomeAssistant = _HomeAssistant
 
 
+class _DoneTask:
+    def cancel(self) -> bool:
+        return False
+
+    def done(self) -> bool:
+        return True
+
+
+def _async_create_background_task(coro, name=None):
+    """FakeHass shim: synchronously drive the coroutine to completion."""
+    try:
+        while True:
+            coro.send(None)
+    except StopIteration:
+        pass
+    return _DoneTask()
+
+
 class _ConfigEntry:
     def __init__(
         self,

tests/test_conversation.py

@@ -94,13 +94,16 @@ def _make_hass(tmp_path: Path, language: str = "de") -> SimpleNamespace:
     async def _run_in_executor(fn, *args):
         return fn(*args)
 
+    from conftest import _async_create_background_task  # type: ignore
+
     hass = SimpleNamespace(
         data={},
         bus=FakeBus(),
         states=FakeStates(),
         services=FakeServices(),
         _scheduled_actions=[],
         async_add_executor_job=_run_in_executor,
+        async_create_background_task=_async_create_background_task,
     )
     hass.config = SimpleNamespace(
         language=language,