from rest_framework.views import APIView
from django.contrib.auth.models import User
from django.shortcuts import get_object_or_404

from api.serializers.event import EventSerializer
from common.build_response import build_response
from web.models import Event, EventDivision


class EventView(APIView):
    def get(self, request, event_id):
        try:
            event = get_object_or_404(Event, pk=event_id)
        except Exception:
            return build_response(404)

        try:
            event_serializer = EventSerializer(event)
        except Exception:
            return build_response(422)

        return build_response(data=event_serializer.data)

    def post(self, request):
        data = request.POST

        try:
            division = get_object_or_404(EventDivision, pk=data.get('division'))
        except Exception:
            return build_response(500, message="Unable to retrieve division info")

        try:
            user = User.objects.filter(email=data.get('created_by')).first()
        except Exception:
            return build_response(500, message="Could not find user!")

        try:
            new_event = Event(
                name=data.get("name"),
                description=data.get("description"),
                division=division,
                start_date=data.get('start_date'),
                end_date=data.get('end_date'),
                submit_by_date=data.get('submit_by_date'),
                chosen_date=None,
                created_by=user
            )

            new_event.save()
        except Exception:
            return build_response(500, message="Unable to create new event!")

        try:
            event_serializer = EventSerializer(new_event)
        except Exception:
            return build_response(422)

        return build_response(200, data=event_serializer.data)

    def put(self,request, event_id):
        try:
            event = get_object_or_404(Event, pk=event_id)
        except Exception:
            return build_response(404)

        data = request.POST

        try:
            division = get_object_or_404(EventDivision, pk=data.get('division'))
        except Exception:
            return build_response(500, message="Unable to retrieve division info")
        
        try:
            event.name = data.get('name', event.name)
            event.description = data.get('description', event.description)
            event.division = None
            event.start_date = data.get('start_date', event.start_date)
            event.end_date = data.get('end_date', event.end_date)
            event.submit_by_date = data.get('submit_by_date', event.submit_by_date)
            event.chosen_date = data.get('chosen_date', event.chosen_date)
            event.created_by = data.get('created_by', event.created_by)

            event.save()

        except Exception:
            build_response(500, message='Unable to update event')

        try:
            event_serializer = EventSerializer(event)
        except Exception:
            return build_response(422)

        return build_response(200, data=event_serializer.data)

    def delete(self, request, event_id):
        try:
            event = get_object_or_404(Event, pk=event_id)
        except Exception:
            return build_response(404)

        try:
            event.active = False
            event.save()
        except Exception:
            return build_response(500, message="Unable to deactivate event")

        try:
            event_serializer = EventSerializer(event)
        except Exception:
            return build_response(422)

        return build_response(204, data=event_serializer)