from django.contrib.auth import get_user_model
from django.contrib import auth
from django.shortcuts import redirect
from rest_framework.views import APIView
from rest_framework.renderers import JSONRenderer
from rest_framework.response import Response

from access.models import Invite
from access.serializers import UserInitSerializer


class TeacherListView(APIView):
    renderer_classes = (JSONRenderer,)
    status_code = 200

    def get(self, request):
        return Response([i.email for i in get_user_model().objects.filter(groups__name='teachers')], self.status_code)


class CheckUserView(APIView):
    renderer_classes = (JSONRenderer,)
    status_code = 200

    def get(self, request):
        if request.user.is_authenticated() and (request.user.is_staff or request.user.is_superuser):
            return Response(True, status=self.status_code)
        return Response(False, status=self.status_code)


class InfoUserView(APIView):
    renderer_classes = (JSONRenderer,)
    status_code = 200

    def get(self, request):
        if request.user.is_authenticated():
            return Response(UserInitSerializer(request.user).data, status=self.status_code)
        return Response('anonymous', status=self.status_code)


class RegistrationView(APIView):
    renderer_classes = (JSONRenderer,)

    @staticmethod
    def get(request):
        try:
            invite = Invite.objects.get(hash=request.GET['hash'])
            invite.owner.is_active = True
            invite.owner.save()
            auth.login(request, invite.owner)
            invite.delete()
            return redirect('/')
        except Invite.DoesNotExist:
            return Response('Приглошения не существует возможно оно сгорело', status=404)

    @staticmethod
    def post(request):
        try:
            get_user_model().objects.get(email=request.JSON['email'].lower())
            return Response('user already exist', status=403)
        except get_user_model().DoesNotExist:
            user = get_user_model().objects.create_student(
                email=request.JSON['email'].lower(),
                password=request.JSON['password']
            )
        return Response(UserInitSerializer(user).data, status=200)


class ChangePasswordView(APIView):
    renderer_classes = (JSONRenderer,)

    @staticmethod
    def post(request):
        if request.user.is_authenticated() and not request.user.check_password(request.JSON['old_password']):
            return Response("Неверный пароль", status=404)
        request.user.set_password(request.JSON['new_password'])
        request.user.save()
        return Response("Пароль был изменён", status=200)


class LoginView(APIView):
    renderer_classes = (JSONRenderer,)

    @staticmethod
    def post(request):
        if not request.user.is_authenticated():
            user = auth.authenticate(email=request.JSON.get('email'), password=request.JSON.get('password'))
            try:
                auth.login(request, user)
            except AttributeError:
                return Response("Неверный пароль", status=404)
        return Response(UserInitSerializer(request.user).data, status=200)


class LogoutView(APIView):
    renderer_classes = (JSONRenderer,)

    @staticmethod
    def post(request):
        if request.user.is_authenticated():
            auth.logout(request)
        return Response(status=204)