from django.shortcuts import render
from django.http import JsonResponse
from rest_framework.views import APIView
from rest_framework.generics import ListAPIView
from rest_framework import status
from rest_framework.response import Response
from .serializers import RoomSerializer, CreateRoomSerializer, UpdateRoomSerializer
from .models import Room

# Create your views here.

class RoomView(ListAPIView):
    queryset = Room.objects.all()
    serializer_class = RoomSerializer

class GetRoom(APIView):
    serializer_class = RoomSerializer
    lookup_url_kwarg = 'code'

    def get(self, request, format=None):
        code = request.GET.get(self.lookup_url_kwarg)
        if code != None:
            room = Room.objects.filter(code=code)
            if room.exists():
                data = RoomSerializer(room[0]).data
                data['is_host'] = self.request.session.session_key == room[0].host
                return Response(data, status=status.HTTP_200_OK)
            else:
                return Response({'Room Not Found': 'Invalid Room Code.'}, status=status.HTTP_400_BAD_REQUEST)

class JoinRoom(APIView):
    lookup_url_kwarg = 'code'

    def post(self, request, format=None):
        if not self.request.session.exists(self.request.session.session_key):
            self.request.session.create()
        
        code = request.data.get(self.lookup_url_kwarg)
        if code != None:
            room_set = Room.objects.filter(code=code)
            if room_set.exists():
                room = room_set[0]
                self.request.session['code'] = code
                return Response({'message': 'Room Joined.'}, status=status.HTTP_200_OK)
            else:
                return Response({'Bad Request': 'Invalid room code'}, status=status.HTTP_400_BAD_REQUEST)
        else:
            return Response({'Bad Request': 'Invalid data, did not find code'}, status=status.HTTP_400_BAD_REQUEST)

class LeaveRoom(APIView):
    def patch(self, request, format=None):
        if 'code' in self.request.session:
            self.request.session.pop('code')
            host = self.request.session.session_key
            room_set = Room.objects.filter(host=host)
            if room_set.exists():
                room = room_set[0]
                room.delete()
        
        return Response({'message': 'Success'}, status=status.HTTP_200_OK)

class CreateRoomView(APIView):
    serializer_class = CreateRoomSerializer

    def post(self, request, format=None):
        if not self.request.session.exists(self.request.session.session_key):
            self.request.session.create()
        
        serializer = self.serializer_class(data=request.data)
        if serializer.is_valid():
            guest_can_pause = serializer.data.get("guest_can_pause")
            votes_to_skip = serializer.data.get("votes_to_skip")
            host = self.request.session.session_key
            queryset = Room.objects.filter(host=host)
            if queryset.exists():
                room = queryset[0]
                room.guest_can_pause = guest_can_pause
                room.votes_to_skip = votes_to_skip
                room.save(update_fields=['guest_can_pause', 'votes_to_skip'])
                self.request.session['code'] = room.code
                return Response(RoomSerializer(room).data, status=status.HTTP_200_OK)
            else:
                room = Room(host=host, guest_can_pause=guest_can_pause, votes_to_skip=votes_to_skip)
                room.save()
                self.request.session['code'] = room.code
                return Response(RoomSerializer(room).data, status=status.HTTP_201_CREATED)
        else:
            return Response({'Bad Request': 'Invalid data...'}, status=status.HTTP_400_BAD_REQUEST)

class UpdateRoomView(APIView):
    serializer_class = UpdateRoomSerializer
    def patch(self, request, format=None):
        serializer = self.serializer_class(data=request.data)
        if serializer.is_valid():
            guest_can_pause = serializer.data.get('guest_can_pause')
            votes_to_skip = serializer.data.get('votes_to_skip')
            code = serializer.data.get('code')

            room_set = Room.objects.filter(code=code)
            if room_set.exists():
                room = room_set[0]
                user_id = self.request.session.session_key
                if room.host != user_id:
                    return Response({'message': 'You are not the host of this room.'}, status = status.HTTP_403_FORBIDDEN)
                
                room.guest_can_pause = guest_can_pause
                room.votes_to_skip = votes_to_skip
                room.code = code
                room.save(update_fields=['guest_can_pause', 'votes_to_skip'])
                return Response(RoomSerializer(room).data, status=status.HTTP_200_OK)
            else:
                return Response({'Bad Request': 'No room was found'}, status=status.HTTP_404_NOT_FOUND)

        return Response({'Bad Request': 'Invalid data'}, status=status.HTTP_400_BAD_REQUEST)
        

class UserDetails(APIView):
    def get(self, request, format=None):
        if not self.request.session.exists(self.request.session.session_key):
            self.request.session.create()
        data = {
            'code': self.request.session.get('code')
        }
        return JsonResponse(data, status=status.HTTP_200_OK)