from django.db import models
from django.contrib.auth.models import User, Group
from django.db.models.signals import post_save
from django.dispatch import receiver


class SchoolProfile(models.Model):
    """Ajoute un champ pour distinguer les groupes écoles des autres."""
    group = models.OneToOneField(Group, on_delete=models.CASCADE)

    def __str__(self):
        return self.group.name


class UserProfile(models.Model):
    """Profil d'un utilisateur"""
    school = models.ForeignKey(SchoolProfile, on_delete=models.SET_NULL, null=True, blank=True)
    user = models.OneToOneField(User, on_delete=models.CASCADE)


@receiver(post_save, sender=UserProfile)
def update_groups(sender, instance, **kwargs):
    instance.user.groups.add(instance.school.group)