from .models import QuizUser


class LazyAuthMiddleware:
    """
    Middleware that automatically creates and authenticates users based on session key.
    No login required - users are created transparently on first visit.
    """
    def __init__(self, get_response):
        self.get_response = get_response

    def __call__(self, request):
        if not request.session.session_key:
            request.session.create()

        session_key = request.session.session_key
        user, created = QuizUser.objects.get_or_create(session_key=session_key)
        request.quiz_user = user

        return self.get_response(request)