import os

from django.conf import settings
from django.db import models
from django.utils.translation import gettext_lazy as _

try:
    from django_scopes import ScopedManager
except ImportError:
    ScopedManager = False


class Token(models.Model):
    key = models.CharField(_('key'), max_length=40, primary_key=True)
    user = models.ForeignKey(
        settings.AUTH_USER_MODEL, related_name='tokens',
        on_delete=models.CASCADE, verbose_name=_('User'),
    )
    creation_date = models.DateTimeField(_('Creation Date'), auto_now_add=True)

    class Meta:
        verbose_name = _('Token')
        verbose_name_plural = _('Tokens')

    def save(self, *args, **kwargs):
        if not self.key:
            self.key = self.gen_key()
        return super().save(*args, **kwargs)

    @classmethod
    def gen_key(cls):
        return os.urandom(20).hex()

    def __str__(self):
        return self.key