from django.db import models
from django.db.models import JSONField

from django.utils.translation import gettext_lazy as _

class UncloudModel(models.Model):
    """
    This class extends the standard model with an
    extra_data field that can be used to include public,
    but internal information.

    For instance if you migrate from an existing virtualisation
    framework to uncloud.

    The extra_data attribute should be considered a hack and whenever
    data is necessary for running uncloud, it should **not** be stored
    in there.

    """

    extra_data = JSONField(editable=False, blank=True, null=True)

    class Meta:
        abstract = True

# See https://docs.djangoproject.com/en/dev/ref/models/fields/#field-choices-enum-types
class UncloudStatus(models.TextChoices):
    PENDING          = 'PENDING', _('Pending')
    AWAITING_PAYMENT = 'AWAITING_PAYMENT', _('Awaiting payment')
    BEING_CREATED    = 'BEING_CREATED', _('Being created')
    SCHEDULED        = 'SCHEDULED', _('Scheduled') # resource selected, waiting for dispatching
    ACTIVE           = 'ACTIVE', _('Active')
    MODIFYING        = 'MODIFYING', _('Modifying') # Resource is being changed
    DELETED          = 'DELETED', _('Deleted')     # Resource has been deleted
    DISABLED         = 'DISABLED', _('Disabled')   # Is usable, but cannot be used for new things
    UNUSABLE         = 'UNUSABLE', _('Unusable'),  # Has some kind of error