Make cv.empty_config_schema log an error instead of raise (home-assistant#93646)

* Make cv.empty_config_schema log an error instead of raise

* Add test

* Update homeassistant/helpers/config_validation.py

Co-authored-by: c0ffeeca7 <38767475+c0ffeeca7@users.noreply.github.com>

---------

Co-authored-by: c0ffeeca7 <38767475+c0ffeeca7@users.noreply.github.com>

Author: emontnemery

homeassistant/helpers/config_validation.py

@@ -1045,9 +1045,33 @@ def expand_condition_shorthand(value: Any | None) -> Any:
 
 
 # Schemas
-def empty_config_schema(domain: str) -> vol.Schema:
-    """Return a config schema which accepts no configuration parameters."""
-    return vol.Schema({vol.Optional(domain): vol.Schema({})}, extra=vol.ALLOW_EXTRA)
+def empty_config_schema(domain: str) -> Callable[[dict], dict]:
+    """Return a config schema which logs if there are configuration parameters."""
+
+    module = inspect.getmodule(inspect.stack(context=0)[2].frame)
+    if module is not None:
+        module_name = module.__name__
+    else:
+        # If Python is unable to access the sources files, the call stack frame
+        # will be missing information, so let's guard.
+        # https://github.com/home-assistant/core/issues/24982
+        module_name = __name__
+    logger_func = logging.getLogger(module_name).error
+
+    def validator(config: dict) -> dict:
+        if domain in config and config[domain]:
+            logger_func(
+                (
+                    "The %s integration does not support any configuration parameters, "
+                    "got %s. Please remove the configuration parameters from your "
+                    "configuration."
+                ),
+                domain,
+                config[domain],
+            )
+        return config
+
+    return validator
 
 
 PLATFORM_SCHEMA = vol.Schema(

tests/helpers/test_config_validation.py

@@ -1468,3 +1468,25 @@ def test_positive_time_period_template() -> None:
     schema("{{ 'invalid' }}")
     schema({"{{ 'invalid' }}": 5})
     schema({"minutes": "{{ 'invalid' }}"})
+
+
+def test_empty_schema(caplog: pytest.LogCaptureFixture) -> None:
+    """Test if the current module cannot be inspected."""
+    expected_message = (
+        "The test_domain integration does not support any configuration parameters"
+    )
+
+    cv.empty_config_schema("test_domain")({})
+    assert expected_message not in caplog.text
+
+    cv.empty_config_schema("test_domain")({"test_domain": {}})
+    assert expected_message not in caplog.text
+
+    cv.empty_config_schema("test_domain")({"test_domain": {"foo": "bar"}})
+    assert expected_message in caplog.text
+
+
+def test_empty_schema_cant_find_module() -> None:
+    """Test if the current module cannot be inspected."""
+    with patch("inspect.getmodule", return_value=None):
+        cv.empty_config_schema("test_domain")({"test_domain": {"foo": "bar"}})