from django.apps import apps
from django.contrib.auth import get_user_model
from django.contrib.auth.models import Group


class RoleMixin(object):
    def create_user_for_role(self, role_name, password, first_name, last_name):
        group = Group(name=role_name)
        group.save()

        user_model = get_user_model()
        email = '{}@localhost'.format(role_name)
        user_name = email
        user = user_model.objects.create_user(username=user_name, password=password, email=user_name,
                                              first_name=first_name, last_name=last_name)
        user.groups.add(group)

        setting_name = 'groups_{}'.format(role_name)
        app_config = apps.get_app_config('dav_events')
        setattr(app_config.settings, setting_name, [role_name])

        return user