from django.db.models import ObjectDoesNotExist
from django.urls.exceptions import Http404
from rest_framework import viewsets, views
from rest_framework.exceptions import PermissionDenied
from rest_framework.response import Response
from .models import ProgrammedReport
from .serializers import ProgrammedReportSerializer
from .permissions import IsOmixomUser
from rest_framework import status


# API de Programmed Reports:
# Requisitos:
#   - Especificar el TOKEN del usuario en el HTTP Header "AUTHORIZATION".
#   - Las requests deben ser JSON.
#   - No es necesario enviar el field user_id, esto es seteado automaticamente al recibir el TOKEN.
# Endpoints: (BASE_URL: /api/preports)
#   - (List) GET /                   -> Obtener la lista de todos los Programmed Report
#   - (Create) POST /                -> Crear un nuevo Programmed Report
#   - (Retrieve) GET /{id}/          -> Obtener la informacion de un Programmed Report
#   - (Update) PUT /{id}/            -> Actualizar un Programmed Report (requiere todos los fields)
#   - (Partial_Update) PATCH /{id}/  -> Actualizar algunos fields de un Programmed Report
#   - (Delete) DELETE /{id}/         -> Elimina un Programmed Report

class SendReportNow(views.APIView):
    permission_classes = [IsOmixomUser]
    def get(self, request, pk):
        """
        Send report right now, regardless of if it should be sent.
        """
        user_id = request.data["user_id"]
        try:
            preport: ProgrammedReport = ProgrammedReport.objects.get(pk=pk)
        except ObjectDoesNotExist:
            raise Http404

        if(int(preport.user_id) != int(user_id)):
            raise PermissionDenied(f"Su usuario no es dueño de este reporte({preport.user_id} != {user_id})")
        sent = preport.send_report_now()
        print("Se envio" if sent else "No se pudo enviar","el Programmed Report ID:", preport.id)
        if not sent:
            return Response("Error al comunicarse con clima", status.HTTP_500_INTERNAL_SERVER_ERROR)
        return Response("Ok", status.HTTP_200_OK)




class ProgrammedReportViewSet(viewsets.ModelViewSet):
    # El ViewSet solo es valido si el Token enviado es de un usuario de Omixom.
    permission_classes = [IsOmixomUser]
    serializer_class = ProgrammedReportSerializer

    # Solo se devuelven los modelos para el user_id asociado al token. (Ver IsOmixomUser)
    def get_queryset(self):
        user_id = self.request.data["user_id"]
        qs = ProgrammedReport.objects.filter(user_id=user_id)
        return qs

# Endpoint para la confirmacion de envio de un reporte programado por parte de Clima:
# Por el momento no es usado:
# class ProgrammedReportSentConfirmation(views.APIView):
#     parser_classes = [JSONParser]

#     def post(self, request, format=None):
#         if(settings.PROGRAMMED_REPORTS_SERVICE_AUTH_TOKEN != request.META.get("HTTP_AUTHORIZATION")):
#             return Response("Invalid Access Credentials.", status.HTTP_403_FORBIDDEN)
#         report = ProgrammedReport.objects.filter(id=request.data.get("id")).first()
#         if report is None:
#             return Response("Invalid Report.", status.HTTP_400_BAD_REQUEST)
#         report.last_report_date = timezone.now()
#         report.save()
#         return Response("Ok", status.HTTP_200_OK)