from django.contrib.auth import logout
from django.http import JsonResponse
from django.middleware.csrf import get_token
from django.shortcuts import redirect
from rest_framework.authentication import SessionAuthentication, BasicAuthentication
from rest_framework.permissions import IsAuthenticated
from rest_framework.views import APIView

from gregui import mailutils


def get_csrf(request):
    response = JsonResponse({"detail": "CSRF cookie set"})
    response["X-CSRFToken"] = get_token(request)
    return response


def logout_view(request):
    if not request.user.is_authenticated:
        return JsonResponse({"detail": "You're not logged in."}, status=400)

    logout(request)
    return JsonResponse({"detail": "Successfully logged out."})


def login_view(request):
    """
    View for pointing login links to

    Sesame will take the query string automatically and use it to create a session for
    the user, so all this needs to do is redirect the user wherever they're supposed to
    go after successfully logging in.
    """
    # TODO: redirect to whatever path the frontend ends up living at (prob '/')
    return redirect("/api/ui/v1/whoami/")


def send_test_email(request):
    mailutils.send_registration_mail("test@example.no", "Foo Bar")
    return JsonResponse({"detail": "Created task to send test mail."})


class SessionView(APIView):
    authentication_classes = [SessionAuthentication, BasicAuthentication]
    permission_classes = [IsAuthenticated]

    @staticmethod
    # pylint: disable=W0622
    def get(request, format=None):
        return JsonResponse({"isAuthenticated": True})


class WhoAmIView(APIView):
    authentication_classes = [SessionAuthentication, BasicAuthentication]
    permission_classes = [IsAuthenticated]

    @staticmethod
    # pylint: disable=W0622
    def get(request, format=None):
        return JsonResponse({"username": request.user.username})