"""

auth module that defines irinotes' users and group

"""

from django.contrib.auth.models import AbstractUser, Group

from django.db import models

from django.utils.translation import ugettext_lazy as _

class User(AbstractUser):

    class Meta:

        verbose_name = _('User')

        verbose_name_plural = _('Users')

class UserProfile(models.Model):

    user = models.OneToOneField(User, on_delete=models.CASCADE, related_name='profile')

    # TODO:

    default_group = models.ForeignKey(

        Group,

        null=False,

        verbose_name=_("UserProfile|default_group"))

    class Meta:

        verbose_name = _('UserProfile')

        verbose_name_plural = _('UserProfiles')

class GroupProfile(models.Model):

    group = models.OneToOneField(

        Group, unique=True, on_delete=models.CASCADE, related_name='profile')

    description = models.TextField(null=True, blank=True)

    # TODO: manage when user is deleted: put first user as owner. delete group if empty

    owner = models.ForeignKey(User, on_delete=models.SET_NULL, null=True)

    # TODO: can not delete group when user is not deleted.

    # TODO: other users cannot set as owner

    # TODO: delete personal group when user is deleted

    # TODO: change group name when user change name

    # indicate that this group is a personal group.

    # used this instead of a boolean because it allows to easily enforce that a user has only one personal group

    owner_personal = models.OneToOneField(User, on_delete=models.CASCADE, null=True, related_name='personal_group')

    @property

    def is_personal(self):

        return self.owner == self.owner_personal

    class Meta:

        verbose_name = _('GroupProfile')

        verbose_name_plural = _('GroupProfiles')