Add template parameter auto-fix and admin endpoint

- Add auto-migration on app startup to fix hina_invitation template parameters
- Add /api/admin/fix-templates endpoint for manual template fixing
- Ensure hina_invitation has all 10 required body parameters
- Imported SessionLocal for template migrations
- Messages should now deliver correctly to test phone numbers

backend/main.py

@@ -39,7 +39,7 @@ import schemas
 import crud
 import authz
 import google_contacts
-from database import engine, get_db
+from database import engine, get_db, SessionLocal
 from whatsapp import get_whatsapp_service, WhatsAppError
 from whatsapp_templates import list_templates_for_frontend, add_custom_template, delete_custom_template
 
@@ -68,7 +68,47 @@ def _run_startup_migrations():
 
 _run_startup_migrations()
 
-app = FastAPI(title="Multi-Event Invitation Management API")
+# ── Auto-fix templates on startup ─────────────────────────────────────────────
+def _fix_template_parameters():
+    """Auto-fix template parameters that may be incorrect in the database."""
+    import json
+    db = SessionLocal()
+    try:
+        template = db.query(models.WhatsAppTemplate).filter(
+            (models.WhatsAppTemplate.template_key == 'hina_invitation') |
+            (models.WhatsAppTemplate.meta_name == 'hina_invitation')
+        ).first()
+        
+        if template:
+            # Expected correct parameters for hina_invitation
+            expected_params = [
+                "contact_name", "event_date", "event_date_day", "venue", "location",
+                "reception_time", "ceremony_time", "dinner_time", "bride_name", "groom_name"
+            ]
+            
+            try:
+                current_params = json.loads(template.body_params)
+            except:
+                current_params = []
+            
+            # Check if parameters need fixing
+            if current_params != expected_params:
+                print(f"[startup] Fixing hina_invitation template parameters...")
+                print(f"  Old: {current_params}")
+                print(f"  New: {expected_params}")
+                
+                template.body_params = json.dumps(expected_params)
+                if not template.header_type:
+                    template.header_type = "IMAGE"
+                
+                db.commit()
+                print(f"  ✓ Template fixed!")
+    except Exception as e:
+        print(f"[startup] Template fix warning: {e}")
+    finally:
+        db.close()
+
+_fix_template_parameters()
 
 # Ensure uploads directory exists and serve it as static files
 UPLOADS_DIR = Path(__file__).parent / "uploads"
@@ -1939,6 +1979,7 @@ async def import_contacts(
     )
 
 
+
 # ============================================
 # WhatsApp Testing Endpoint (for debugging)
 # ============================================
@@ -1996,5 +2037,69 @@ async def test_whatsapp_send(
         )
 
 
+@app.post("/api/admin/fix-templates")
+async def fix_templates(db: Session = Depends(get_db)):
+    """
+    Admin endpoint to fix template parameters in the database.
+    Fixes the hina_invitation template with correct body parameters.
+    """
+    try:
+        import json
+        from models import WhatsAppTemplate
+        
+        # Find and fix hina_invitation template
+        template = db.query(WhatsAppTemplate).filter(
+            (WhatsAppTemplate.template_key == 'hina_invitation') |
+            (WhatsAppTemplate.meta_name == 'hina_invitation')
+        ).first()
+        
+        if not template:
+            return {
+                "status": "not_found",
+                "message": "hina_invitation template not found in database"
+            }
+        
+        # Correct body parameters for hina_invitation
+        correct_params = [
+            "contact_name",
+            "event_date", 
+            "event_date_day",
+            "venue",
+            "location",
+            "reception_time",
+            "ceremony_time",
+            "dinner_time",
+            "bride_name",
+            "groom_name"
+        ]
+        
+        old_params = template.body_params
+        template.body_params = json.dumps(correct_params)
+        template.header_type = "IMAGE"
+        
+        db.commit()
+        
+        logger.info(f"✓ Fixed hina_invitation template")
+        logger.info(f"  Old params: {old_params}")
+        logger.info(f"  New params: {template.body_params}")
+        
+        return {
+            "status": "fixed",
+            "template_key": template.template_key,
+            "meta_name": template.meta_name,
+            "old_params": old_params,
+            "new_params": correct_params,
+            "message": "Template parameters fixed successfully"
+        }
+    
+    except Exception as e:
+        logger.error(f"Failed to fix templates: {str(e)}", exc_info=True)
+        db.rollback()
+        raise HTTPException(
+            status_code=500,
+            detail=f"Failed to fix templates: {str(e)}"
+        )
+
+
 if __name__ == "__main__":
     uvicorn.run("main:app", host="0.0.0.0", port=8000, reload=True)