"""Provide pi simulation results."""
from rest_framework.decorators import action
from rest_framework.permissions import IsAuthenticated
from rest_framework.response import Response
from rest_framework.viewsets import ReadOnlyModelViewSet

from pi.models import PiLog
from pi.serializers import PiLogSerializer


class PiLogViewSet(ReadOnlyModelViewSet):
    """Provide list and detail actions for pi simulation log entries."""

    queryset = PiLog.objects.all()
    serializer_class = PiLogSerializer
    permission_classes = [IsAuthenticated]

    @action(detail=False, methods=['post'])
    def simulate(self, request):
        """Run one simulation of the pi estimator."""
        simulation, _, _ = PiLog.objects.simulate()
        return Response(self.get_serializer(simulation).data)