from drf_spectacular.utils import extend_schema
from rest_framework import status
from rest_framework.response import Response
from rest_framework.views import APIView

from config.swagger import status_response
from external_api_adapter import request as external_api_request
from farm_hub.models import FarmHub
from .models import EconomicOverviewLog
from .serializers import EconomicOverviewRequestSerializer, EconomicOverviewSerializer


class EconomyOverviewView(APIView):
    @staticmethod
    def _get_farm(request, farm_uuid):
        if not farm_uuid:
            return None, Response(
                {"code": 400, "msg": "error", "data": {"farm_uuid": ["This field is required."]}},
                status=status.HTTP_400_BAD_REQUEST,
            )
        try:
            return FarmHub.objects.get(farm_uuid=farm_uuid, owner=request.user), None
        except FarmHub.DoesNotExist:
            return None, Response(
                {"code": 404, "msg": "error", "data": {"farm_uuid": ["Farm not found."]}},
                status=status.HTTP_404_NOT_FOUND,
            )

    @staticmethod
    def _extract_result(adapter_data):
        if not isinstance(adapter_data, dict):
            return {}

        data = adapter_data.get("data")
        if isinstance(data, dict) and isinstance(data.get("result"), dict):
            return data["result"]
        if isinstance(data, dict):
            return data

        result = adapter_data.get("result")
        if isinstance(result, dict):
            return result

        return adapter_data

    @staticmethod
    def _persist_log(farm, overview_data):
        if not isinstance(overview_data, dict):
            return
        EconomicOverviewLog.objects.create(
            farm=farm,
            economic_data=overview_data.get("economicData", []),
            chart_series=overview_data.get("chartSeries", []),
            chart_categories=overview_data.get("chartCategories", []),
        )

    @extend_schema(
        tags=["Economy"],
        request=EconomicOverviewRequestSerializer,
        responses={200: status_response("EconomyOverviewResponse", data=EconomicOverviewSerializer())},
    )
    def post(self, request):
        serializer = EconomicOverviewRequestSerializer(data=request.data)
        serializer.is_valid(raise_exception=True)

        farm, error_response = self._get_farm(request, serializer.validated_data["farm_uuid"])
        if error_response is not None:
            return error_response

        payload = {"farm_uuid": str(farm.farm_uuid)}
        adapter_response = external_api_request(
            "ai",
            "/api/economy/overview/",
            method="POST",
            payload=payload,
        )

        if adapter_response.status_code >= 400:
            response_data = (
                adapter_response.data
                if isinstance(adapter_response.data, dict)
                else {"message": str(adapter_response.data)}
            )
            return Response(
                {"code": adapter_response.status_code, "msg": "error", "data": response_data},
                status=adapter_response.status_code,
            )

        overview_data = self._extract_result(adapter_response.data)
        if isinstance(overview_data, dict):
            overview_data.setdefault("farm_uuid", str(farm.farm_uuid))
        self._persist_log(farm, overview_data)
        return Response({"code": 200, "msg": "success", "data": overview_data}, status=status.HTTP_200_OK)