from django.shortcuts import render
from django.shortcuts import redirect
from django.contrib.auth import login
from django.utils.encoding import force_text
from django.utils.http import urlsafe_base64_decode
from .tokens import account_activation_token
from django.contrib.auth.models import User


def activate(request, uidb64, token):
    try:
        uid = force_text(urlsafe_base64_decode(uidb64))
        user = User.objects.get(pk=uid)
    except(TypeError, ValueError, OverflowError, User.DoesNotExist):
        user = None
    if user is not None and account_activation_token.check_token(user, token):
        user.is_active = True
        user.save()
        login(request=request, user=user,
              backend='django.contrib.auth.backends.ModelBackend')
        return redirect('projects')
    else:
        return render(request, 'validate_mail_address_invalid.html')