debug: Add comprehensive logging to trace historical value lookup

backend/routers/goals.py

@@ -514,11 +514,17 @@ def update_goal(goal_id: str, data: GoalUpdate, session: dict = Depends(require_
                 goal_row = cur.fetchone()
                 if goal_row:
                     goal_type = goal_row['goal_type']
+                    print(f"[DEBUG] Looking up historical value for {goal_type} on {data.start_date}")
                     historical_value = _get_historical_value_for_goal_type(conn, pid, goal_type, data.start_date)
+                    print(f"[DEBUG] Historical value result: {historical_value}")
                     if historical_value is not None:
                         updates.append("start_value = %s")
                         params.append(historical_value)
                         print(f"[INFO] Auto-populated start_value from {data.start_date}: {historical_value}")
+                    else:
+                        print(f"[WARN] No historical data found for {goal_type} around {data.start_date}")
+                else:
+                    print(f"[ERROR] Could not find goal with id {goal_id}")
 
         if data.start_value is not None:
             updates.append("start_value = %s")
@@ -696,12 +702,16 @@ def _get_historical_value_for_goal_type(conn, profile_id: str, goal_type: str, t
     # Get goal type configuration
     config = get_goal_type_config(conn, goal_type)
     if not config:
+        print(f"[DEBUG] No config found for goal_type: {goal_type}")
         return None
 
     source_table = config.get('source_table')
     source_column = config.get('source_column')
 
+    print(f"[DEBUG] Config: table={source_table}, column={source_column}")
+
     if not source_table or not source_column:
+        print(f"[DEBUG] Missing source_table or source_column")
         return None
 
     # Query for value closest to target_date (±7 days window)
@@ -716,26 +726,37 @@ def _get_historical_value_for_goal_type(conn, profile_id: str, goal_type: str, t
         else:
             date_col = 'date'
 
-        cur.execute(f"""
+        query = f"""
             SELECT {source_column}
             FROM {source_table}
             WHERE profile_id = %s
               AND {date_col} BETWEEN %s AND %s
             ORDER BY ABS({date_col} - %s::date)
             LIMIT 1
-        """, (
+        """
+        params = (
             profile_id,
             target_date - timedelta(days=7),
             target_date + timedelta(days=7),
             target_date
-        ))
+        )
+
+        print(f"[DEBUG] Query: {query}")
+        print(f"[DEBUG] Params: {params}")
+
+        cur.execute(query, params)
 
         row = cur.fetchone()
+        print(f"[DEBUG] Query result: {row}")
+
         if row:
             value = row[source_column]
             # Convert Decimal to float
-            return float(value) if value is not None else None
+            result = float(value) if value is not None else None
+            print(f"[DEBUG] Returning value: {result}")
+            return result
 
+        print(f"[DEBUG] No data found in date range")
         return None
     except Exception as e:
         print(f"[ERROR] Failed to get historical value for {goal_type} on {target_date}: {e}")