class Category(TimeStampedModel):
    name = models.CharField(_("Category name"), max_length=256)

    def __str__(self):
        return self.name

    class Meta:
        verbose_name = _('Category')
        verbose_name_plural = _('Categories')


class QuickLinkDescription(TimeStampedModel):
    description = models.CharField(_("Description"), max_length=256)

    def __str__(self):
        return self.description

    class Meta:
        verbose_name = _('Description')
        verbose_name_plural = _('Descriptions')


class QuickLinkUrl(TimeStampedModel):
    link = models.URLField(_("Link"), max_length=256)

    def __str__(self):
        return self.link

    class Meta:
        verbose_name = _('Link')
        verbose_name_plural = _('Links')


class QuickLinkName(TimeStampedModel):
    name = models.CharField(_("Name"), max_length=256)

    def __str__(self):
        return self.name

    class Meta:
        verbose_name = _('Name')
        verbose_name_plural = _('Names')


class QuickLink(TimeStampedModel):
    name = models.OneToOneField(
        QuickLinkName,
        on_delete=models.CASCADE,
        related_name='quicklink_name',
        null=True
    )
    link = models.OneToOneField(
        QuickLinkUrl,
        on_delete=models.CASCADE,
        related_name='quicklink_link',
        null=True
    )
    category = models.OneToOneField(
        Category,
        on_delete=models.CASCADE,
        related_name='quicklink_category',
        null=True
    )
    description = models.OneToOneField(
        QuickLinkDescription,
        on_delete=models.CASCADE,
        related_name='quicklink_description',
        null=True
    )

    def __str__(self):
        return '{} {} {} {}'.format(
            self.name.name,
            self.link.link,
            self.category.name,
            self.description.description
        )

    class Meta:
        verbose_name = _('Quick link')
        verbose_name_plural = _('Quick links')