from rest_framework.authtoken.views import ObtainAuthToken
from rest_framework.authtoken.models import Token
from rest_framework.response import Response
from rest_framework.request import Request
from rest_framework.views import APIView
from django.contrib.auth.models import User

class CustomAuthToken(ObtainAuthToken):

    def post(self, request: Request, *args, **kwargs):
        serializer = self.serializer_class(data=request.data,
                                           context={'request': request})
        serializer.is_valid(raise_exception=True)
        user = serializer.validated_data['user']
        token, created = Token.objects.get_or_create(user=user)
        return Response({
            'token': token.key,
            'user_id': user.pk,
            'username': user.username
        })


class RegisterView(APIView):

    def get(self, request: Request, *args, **kwargs):
        username = request.data.get("username", None)
        if not username:
            return Response({"message": "Username must not be empty"}, status=406)
        if User.objects.filter(username=username).exists():
            return Response({"message": "Username already taken"}, status=409)
        return Response({"message": "Username availiable"}, status=200)

    def post(self, request: Request, *args, **kwargs):
        username = request.data.get("username")
        if not username:
            return Response({"message": "Username must not be empty"}, status=406)
        if User.objects.filter(username=username).exists():
            return Response({"message": "Username already taken"}, status=409)
        password = request.data.get("password", None)
        if not password:
            return Response({"message": "Password must not be empty"}, status=406)
        try:
            user = User.objects.create_user(
                is_superuser=False,
                username=username,
                password=password
            )
            token, created = Token.objects.get_or_create(user=user)
            return Response({
                'token': token.key,
                'user_id': user.pk,
                'username': user.username
            }, status=200)
        except Exception as e:
            return Response({"message": "Something went wrong, registration is not completed", "error": e}, status=500)