Fix photosynthesis/current: route to predict_fvcb/predict_ml with live conditions

backend/api/routes/photosynthesis.py

@@ -2,6 +2,7 @@
 
 from __future__ import annotations
 
+import logging
 from enum import Enum
 
 from fastapi import APIRouter, Depends, Query
@@ -9,6 +10,7 @@ from fastapi import APIRouter, Depends, Query
 from backend.api.deps import get_datahub
 from src.data.data_providers import DataHub
 
+log = logging.getLogger(__name__)
 router = APIRouter()
 
 
@@ -17,12 +19,36 @@ class PSModel(str, Enum):
     ml = "ml"
 
 
+def _live_conditions(hub: DataHub) -> dict:
+    """Try to get live sensor conditions; return sensible defaults if unavailable."""
+    defaults = {"PAR": 1000.0, "Tleaf": 30.0, "CO2": 400.0, "VPD": 1.5, "Tair": 30.0}
+    try:
+        snap = hub.vine_sensors.get_snapshot(light=True)
+        if isinstance(snap, dict) and "error" not in snap:
+            tair = snap.get("air_temperature_c") or snap.get("temperature")
+            if tair is not None:
+                defaults["Tair"] = float(tair)
+                defaults["Tleaf"] = float(tair)  # approximate
+            ghi = snap.get("ghi") or snap.get("solar_radiation")
+            if ghi is not None:
+                defaults["PAR"] = float(ghi) * 2.04  # W/m² → µmol/m²/s approx
+            rh = snap.get("relative_humidity")
+            if rh is not None:
+                defaults["VPD"] = max(0.1, (1 - float(rh) / 100) * 3.0)
+    except Exception as exc:
+        log.debug("Could not fetch live conditions for FvCB: %s", exc)
+    return defaults
+
+
 @router.get("/current")
 async def ps_current(
     model: PSModel = Query(PSModel.fvcb, description="Model: fvcb or ml"),
     hub: DataHub = Depends(get_datahub),
 ):
-    return hub.photosynthesis.get_current(model=model.value)
+    if model == PSModel.fvcb:
+        conds = _live_conditions(hub)
+        return hub.photosynthesis.predict_fvcb(**conds)
+    return hub.photosynthesis.predict_ml()
 
 
 @router.get("/forecast")