fixed circular imports

backend/agent.py

@@ -32,7 +32,7 @@ from langgraph.checkpoint.memory import MemorySaver
 # from googleapiclient.discovery import build
 
 # import function from api.py
-from .api import get_gcal_service
+from .g_cal import get_gcal_service
 
 GOOGLE_SCOPES = ["https://www.googleapis.com/auth/calendar.events"]
 

backend/api.py

@@ -12,12 +12,7 @@ from uuid import uuid4
 from pathlib import Path
 import json, secrets, urllib.parse, os
 from google_auth_oauthlib.flow import Flow
-from google.oauth2.credentials import Credentials
-from googleapiclient.discovery import build
 
-# --- import your compiled LangGraph app ---
-# agent.py exports: app = graph.compile(...)
-# ensure backend/__init__.py exists and you run uvicorn from repo root.
 from .agent import app as lg_app
 
 api = FastAPI(title="LangGraph Chat API")
@@ -38,12 +33,12 @@ api.add_middleware(
     allow_credentials=True,
 )
 
-SCOPES = ["https://www.googleapis.com/auth/calendar.events"]
+from .g_cal import SCOPES, TOKEN_FILE 
+
 CLIENT_ID = os.getenv("GOOGLE_CLIENT_ID")
 CLIENT_SECRET = os.getenv("GOOGLE_CLIENT_SECRET")
 BASE_URL = os.getenv("PUBLIC_BASE_URL", "http://localhost:8000")
 REDIRECT_URI = f"{BASE_URL}/oauth/google/callback"
-TOKEN_FILE = Path("/data/google_token.json")  # persistent on HF Spaces
 
 def _client_config():
     return {
@@ -81,16 +76,6 @@ def oauth_callback(request: Request):
     TOKEN_FILE.write_text(creds.to_json())
     return PlainTextResponse("Google Calendar connected. You can close this tab.")
 
-def get_gcal_service():
-    if TOKEN_FILE.exists():
-        creds = Credentials.from_authorized_user_file(str(TOKEN_FILE), SCOPES)
-    else:
-        # Not authorized yet
-        raise RuntimeError(
-            f"Google not connected. Visit {BASE_URL}/oauth/google/start to connect."
-        )
-    return build("calendar", "v3", credentials=creds)
-
 @api.get("/health")
 def health():
     return {"ok": True}

backend/g_cal.py

@@ -0,0 +1,21 @@
+# backend/gcal.py
+import os
+from pathlib import Path
+from google.oauth2.credentials import Credentials
+from googleapiclient.discovery import build
+
+# Same scope you used everywhere
+SCOPES = ["https://www.googleapis.com/auth/calendar.events"]
+
+# HF Spaces persistent disk path (Settings → Persistent storage)
+TOKEN_FILE = Path(os.getenv("GCAL_TOKEN_PATH", "/data/google_token.json"))
+
+def get_gcal_service():
+    """
+    Load saved Google OAuth credentials and return a Calendar API client.
+    Raise a clear error if not connected yet.
+    """
+    if not TOKEN_FILE.exists():
+        raise RuntimeError("Google Calendar not connected. Visit /oauth/google/start to connect.")
+    creds = Credentials.from_authorized_user_file(str(TOKEN_FILE), SCOPES)
+    return build("calendar", "v3", credentials=creds)