UPDATE

fertilization_recommendation/services.py

@@ -0,0 +1,50 @@
+from copy import deepcopy
+
+from .mock_data import FERTILIZATION_DASHBOARD_RECOMMENDATION, RECOMMEND_RESPONSE_DATA
+from .models import FertilizationRecommendationRequest
+
+
+def _extract_result(response_payload):
+    if not isinstance(response_payload, dict):
+        return {}
+
+    data = response_payload.get("data")
+    if isinstance(data, dict) and isinstance(data.get("result"), dict):
+        return data["result"]
+
+    result = response_payload.get("result")
+    if isinstance(result, dict):
+        return result
+
+    return {}
+
+
+def _get_latest_result(farm):
+    if farm is None:
+        return {}
+
+    for request in FertilizationRecommendationRequest.objects.filter(farm=farm):
+        result = _extract_result(request.response_payload)
+        if result:
+            return result
+
+    return {}
+
+
+def get_fertilization_dashboard_recommendation(farm=None):
+    default_item = deepcopy(FERTILIZATION_DASHBOARD_RECOMMENDATION)
+    result = _get_latest_result(farm)
+    plan = result.get("plan") or RECOMMEND_RESPONSE_DATA.get("plan", {})
+
+    npk_ratio = plan.get("npkRatio") or "20-20-20 (NPK)"
+    amount = plan.get("amountPerHectare")
+    method = plan.get("applicationMethod")
+    interval = plan.get("applicationInterval")
+
+    subtitle_parts = [part for part in [amount, method, interval] if part]
+
+    default_item["title"] = f"کود: {npk_ratio}"
+    if subtitle_parts:
+        default_item["subtitle"] = "، ".join(subtitle_parts)
+
+    return default_item