Fix Philips TV state on TVs where screenstate is always off (#183207)

Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>

homeassistant/components/philips_js/media_player.py

@@ -456,11 +456,24 @@ class PhilipsTVMediaPlayer(PhilipsJsEntity, MediaPlayerEntity):
             self.media_content_type, self.media_content_id, None
         )
 
+    @property
+    def _ambilight_idle(self) -> bool:
+        """Return True if ambilight reports no active configuration.
+
+        Some TVs without a powerstate endpoint always report the screen as off,
+        but only return an ambilight configuration while the TV is on.
+        """
+        if not self._tv.json_feature_supported("ambilight", "Ambilight"):
+            return True
+        return self._tv.ambilight_current_configuration is None
+
     @callback
     def _update_from_coordinator(self):
         if self._tv.on:
             if self._tv.powerstate in ("Standby", "StandbyKeep") or (
-                self._tv.powerstate is None and self._tv.screenstate == TV_STATE_OFF
+                self._tv.powerstate is None
+                and self._tv.screenstate == TV_STATE_OFF
+                and self._ambilight_idle
             ):
                 self._attr_state = MediaPlayerState.OFF
             else:

tests/components/philips_js/test_media_player.py

@@ -39,3 +39,36 @@ async def test_state(
 
     assert (state := hass.states.get(MOCK_ENTITY_ID))
     assert state.state == expected_state
+
+
+@pytest.mark.parametrize(
+    ("ambilight_configuration", "expected_state"),
+    [
+        pytest.param(None, STATE_OFF, id="ambilight-idle"),
+        pytest.param(
+            {"styleName": "FOLLOW_VIDEO", "isExpert": False},
+            STATE_ON,
+            id="ambilight-active",
+        ),
+    ],
+)
+async def test_state_screenstate_always_off(
+    hass: HomeAssistant,
+    mock_tv: PhilipsTV,
+    mock_config_entry: MockConfigEntry,
+    ambilight_configuration: dict[str, str | bool] | None,
+    expected_state: str,
+) -> None:
+    """Test ambilight decides the state when screenstate is always off."""
+    mock_tv.json_feature_supported.side_effect = lambda feature, value: (
+        (feature, value) == ("ambilight", "Ambilight")
+    )
+    mock_tv.powerstate = None
+    mock_tv.screenstate = TV_STATE_OFF
+    mock_tv.ambilight_current_configuration = ambilight_configuration
+
+    assert await hass.config_entries.async_setup(mock_config_entry.entry_id)
+    await hass.async_block_till_done()
+
+    assert (state := hass.states.get(MOCK_ENTITY_ID))
+    assert state.state == expected_state