from rest_framework import viewsets
from rest_framework.response import Response
from rest_framework import permissions, status
from rest_framework.authentication import SessionAuthentication

from django.http import HttpRequest
from django.contrib.auth import login
from django.db.models import QuerySet

from matchmaking.models import in_matchmaking
from .models import TournamentModel
from .serializers import TournamentSerializer

# Create your views here.
class TournamentViewSet(viewsets.ModelViewSet):
    
	queryset = TournamentModel.objects.all
	serializer_class = TournamentSerializer
	permission_classes = (permissions.IsAuthenticated,)
	authentication_classes = (SessionAuthentication,)

	def perform_create(self, request: HttpRequest):

		data: dict = request.data

		nb_players_by_game = data.get("nb_players_by_game")
		if (nb_players_by_game is None):
			return Response("nb_player_by_game is required.", status=status.HTTP_400_BAD_REQUEST)

		nb_players = data.get("nb_players")
		if (nb_players is None):
			return Response("nb_players is required.", status=status.HTTP_400_BAD_REQUEST)

		tournament_id: int = TournamentModel().create(nb_players=nb_players, nb_players_by_game=nb_players_by_game)
		
		return Response({"tournament_id": tournament_id}, status=status.HTTP_201_CREATED)
	
	def list(self, request: HttpRequest, state: str = ""):
		query: QuerySet
		match state:
			case "started":
				query = TournamentModel.objects.filter(started=True, finished=False)
			case "finished":
				query = TournamentModel.objects.filter(finished=True)
			case "currently":
				query = TournamentModel.objects.filter(started=False, finished=False)
			case _:
				query = TournamentModel.objects.all()
		serializer = TournamentSerializer(query, many=True)	
		return Response(serializer.data)

	def retrieve(self, request: HttpRequest, pk):

		if (not TournamentModel.objects.filter(pk=pk).exists()):
			return Response({"detail": "Tournament not found."}, status=status.HTTP_404_NOT_FOUND)
		
		tournament = TournamentModel.objects.get(pk=pk)

		return Response(self.serializer_class(tournament).data, status=status.HTTP_200_OK)