Migrate entity unique ids in PI-Hole (#90883)

* migrate entity unique ids

* Update homeassistant/components/pi_hole/__init__.py

---------

Co-authored-by: Paulus Schoutsen <paulus@home-assistant.io>

homeassistant/components/pi_hole/__init__.py

@@ -16,9 +16,9 @@ from homeassistant.const import (
     CONF_VERIFY_SSL,
     Platform,
 )
-from homeassistant.core import HomeAssistant
+from homeassistant.core import HomeAssistant, callback
 from homeassistant.exceptions import ConfigEntryAuthFailed
-from homeassistant.helpers import config_validation as cv
+from homeassistant.helpers import config_validation as cv, entity_registry as er
 from homeassistant.helpers.aiohttp_client import async_get_clientsession
 from homeassistant.helpers.entity import DeviceInfo
 from homeassistant.helpers.update_coordinator import (
@@ -64,6 +64,38 @@ async def async_setup_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
 
     _LOGGER.debug("Setting up %s integration with host %s", DOMAIN, host)
 
+    name_to_key = {
+        "Core Update Available": "core_update_available",
+        "Web Update Available": "web_update_available",
+        "FTL Update Available": "ftl_update_available",
+        "Status": "status",
+        "Ads Blocked Today": "ads_blocked_today",
+        "Ads Percentage Blocked Today": "ads_percentage_today",
+        "Seen Clients": "clients_ever_seen",
+        "DNS Queries Today": "dns_queries_today",
+        "Domains Blocked": "domains_being_blocked",
+        "DNS Queries Cached": "queries_cached",
+        "DNS Queries Forwarded": "queries_forwarded",
+        "DNS Unique Clients": "unique_clients",
+        "DNS Unique Domains": "unique_domains",
+    }
+
+    @callback
+    def update_unique_id(
+        entity_entry: er.RegistryEntry,
+    ) -> dict[str, str] | None:
+        """Update unique ID of entity entry."""
+        unique_id_parts = entity_entry.unique_id.split("/")
+        if len(unique_id_parts) == 2 and unique_id_parts[1] in name_to_key:
+            name = unique_id_parts[1]
+            new_unique_id = entity_entry.unique_id.replace(name, name_to_key[name])
+            _LOGGER.debug("Migrate %s to %s", entity_entry.unique_id, new_unique_id)
+            return {"new_unique_id": new_unique_id}
+
+        return None
+
+    await er.async_migrate_entries(hass, entry.entry_id, update_unique_id)
+
     session = async_get_clientsession(hass, verify_tls)
     api = Hole(
         host,