Load sun via entity component (#132598)

* Load sun via entity component

* Remove unique id

* Remove entity registry

homeassistant/components/sun/__init__.py

@@ -2,10 +2,13 @@
 
 from __future__ import annotations
 
+import logging
+
 from homeassistant.config_entries import SOURCE_IMPORT
 from homeassistant.const import Platform
 from homeassistant.core import HomeAssistant
 from homeassistant.helpers import config_validation as cv
+from homeassistant.helpers.entity_component import EntityComponent
 from homeassistant.helpers.typing import ConfigType
 
 # The sensor platform is pre-imported here to ensure
@@ -23,6 +26,8 @@ from .entity import Sun, SunConfigEntry
 
 CONFIG_SCHEMA = cv.empty_config_schema(DOMAIN)
 
+_LOGGER = logging.getLogger(__name__)
+
 
 async def async_setup(hass: HomeAssistant, config: ConfigType) -> bool:
     """Track the state of the sun."""
@@ -42,7 +47,10 @@ async def async_setup(hass: HomeAssistant, config: ConfigType) -> bool:
 
 async def async_setup_entry(hass: HomeAssistant, entry: SunConfigEntry) -> bool:
     """Set up from a config entry."""
-    entry.runtime_data = sun = Sun(hass)
+    sun = Sun(hass)
+    component = EntityComponent[Sun](_LOGGER, DOMAIN, hass)
+    await component.async_add_entities([sun])
+    entry.runtime_data = sun
     entry.async_on_unload(sun.remove_listeners)
     await hass.config_entries.async_forward_entry_setups(entry, [Platform.SENSOR])
     return True
@@ -53,6 +61,5 @@ async def async_unload_entry(hass: HomeAssistant, entry: SunConfigEntry) -> bool
     if unload_ok := await hass.config_entries.async_unload_platforms(
         entry, [Platform.SENSOR]
     ):
-        sun = entry.runtime_data
+        await entry.runtime_data.async_remove()
-        hass.states.async_remove(sun.entity_id)
     return unload_ok

homeassistant/components/sun/entity.py

@@ -100,9 +100,6 @@ class Sun(Entity):
 
     _attr_name = "Sun"
     entity_id = ENTITY_ID
-    # This entity is legacy and does not have a platform.
-    # We can't fix this easily without breaking changes.
-    _no_platform_reported = True
 
     location: Location
     elevation: Elevation
@@ -122,18 +119,16 @@ class Sun(Entity):
         self.hass = hass
         self.phase: str | None = None
 
-        # This is normally done by async_internal_added_to_hass which is not called
-        # for sun because sun has no platform
-        self._state_info = {
-            "unrecorded_attributes": self._Entity__combined_unrecorded_attributes  # type: ignore[attr-defined]
-        }
-
         self._config_listener: CALLBACK_TYPE | None = None
         self._update_events_listener: CALLBACK_TYPE | None = None
         self._update_sun_position_listener: CALLBACK_TYPE | None = None
         self._config_listener = self.hass.bus.async_listen(
             EVENT_CORE_CONFIG_UPDATE, self.update_location
         )
+
+    async def async_added_to_hass(self) -> None:
+        """Update after entity has been added."""
+        await super().async_added_to_hass()
         self.update_location(initial=True)
 
     @callback