from django.dispatch import receiver
from django.db.models.signals import pre_save, post_save
from django.template.defaultfilters import slugify
from django.utils.crypto import get_random_string

from .models import Profile
from adhesions.models import User


@receiver(pre_save, sender=User, dispatch_uid='set_unusable_password')
def set_unusable_password(sender, instance, **kwargs):
    if not instance.password:
        instance.set_password(get_random_string(length=32))


@receiver(pre_save, sender=User, dispatch_uid='set_default_username')
def set_default_username(sender, instance, **kwargs):
    if not instance.username:
        instance.username = slugify(instance.get_full_name())


@receiver(post_save, sender=User, dispatch_uid='create_profile')
def create_profile(sender, instance, created, **kwargs):
    if created:
        Profile.objects.create(user=instance)