From c61d7fd698a8b19783d374f8847ccb4afda60345 Mon Sep 17 00:00:00 2001
From: Scarriffle <admin@scarriffle.com>
Date: Wed, 29 Apr 2026 19:55:04 +0200
Subject: [PATCH] =?UTF-8?q?fix:=20HA=20Delete=20=E2=80=93=20Fallback=20auf?=
 =?UTF-8?q?=20REST=20DELETE=20und=20klarere=20Fehlermeldung=20calendar.del?=
 =?UTF-8?q?ete=5Fevent=20schl=C3=A4gt=20mit=20400=20fehl,=20wenn=20die=20H?=
 =?UTF-8?q?A-Integration=20das=20Feature=20nicht=20unterst=C3=BCtzt=20(z.B?=
 =?UTF-8?q?.=20Google-Calendar=20via=20HA=20hat=20nur=20CREATE=5FEVENT,=20?=
 =?UTF-8?q?kein=20DELETE/UPDATE).=20-=20Versucht=20erst=20Service-Call,=20?=
 =?UTF-8?q?dann=20REST=20DELETE=20als=20Fallback=20-=20Bei=20400=20wird=20?=
 =?UTF-8?q?der=20User=20aufgekl=C3=A4rt,=20dass=20die=20Integration=20verm?=
 =?UTF-8?q?utlich=20=20=20kein=20L=C3=B6schen=20unterst=C3=BCtzt?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
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---
 backend/routers/homeassistant_router.py | 29 +++++++++++++++++++------
 1 file changed, 22 insertions(+), 7 deletions(-)

diff --git a/backend/routers/homeassistant_router.py b/backend/routers/homeassistant_router.py
index 868a0ca..35abd78 100644
--- a/backend/routers/homeassistant_router.py
+++ b/backend/routers/homeassistant_router.py
@@ -220,13 +220,28 @@ def _ha_delete_event(url: str, token: str, entity_id: str, uid: str):
         f"{base}/api/services/calendar/delete_event",
         headers=headers, json=body, timeout=15, verify=False,
     )
-    if not resp.ok:
-        try:
-            detail = resp.json().get("message", resp.text[:500])
-        except Exception:
-            detail = resp.text[:500] if resp.text else f"HTTP {resp.status_code}"
-        raise Exception(f"HA delete_event ({resp.status_code}): {detail}")
-    return resp
+    if resp.ok:
+        return resp
+
+    # Try REST API DELETE as fallback (works for some integrations)
+    from urllib.parse import quote
+    encoded_uid = quote(uid, safe="")
+    rest_resp = http_requests.delete(
+        f"{base}/api/calendars/{entity_id}/{encoded_uid}",
+        headers={"Authorization": f"Bearer {token}"},
+        timeout=15, verify=False,
+    )
+    if rest_resp.ok:
+        return rest_resp
+
+    # Both failed – build a helpful error message
+    try:
+        detail = resp.json().get("message", resp.text[:500])
+    except Exception:
+        detail = resp.text[:500] if resp.text else f"HTTP {resp.status_code}"
+    if resp.status_code == 400:
+        detail = f"{detail} (Diese HA-Kalender-Integration unterstützt kein Löschen — z.B. Google-Calendar via HA ist read-only für Updates/Löschen)"
+    raise Exception(f"HA delete_event ({resp.status_code}): {detail}")
 
 
 def _parse_ha_event(ev: dict, cal_db_id: int, cal_name: str, cal_color: str) -> dict: