from django.db import models
from django.contrib.auth.models import User
from django.contrib.auth.models import AbstractUser
from django.contrib.auth.models import AbstractUser, BaseUserManager ## A new class is imported. ##
from django.db import models
from django.utils.translation import ugettext_lazy as _


class UserManager(BaseUserManager):
    """Define a model manager for User model with no username field."""

    use_in_migrations = True

    def _create_user(self, email, password, **extra_fields):
        """Create and save a User with the given email and password."""
        if not email:
            raise ValueError('The given email must be set')
        email = self.normalize_email(email)
        user = self.model(email=email, **extra_fields)
        user.set_password(password)
        user.save(using=self._db)
        return user

    def create_user(self, email, password=None, **extra_fields):
        """Create and save a regular User with the given email and password."""
        extra_fields.setdefault('is_staff', False)
        extra_fields.setdefault('is_superuser', False)
        return self._create_user(email, password, **extra_fields)

    def create_superuser(self, email, password, **extra_fields):
        """Create and save a SuperUser with the given email and password."""
        extra_fields.setdefault('is_staff', True)
        extra_fields.setdefault('is_superuser', True)

        if extra_fields.get('is_staff') is not True:
            raise ValueError('Superuser must have is_staff=True.')
        if extra_fields.get('is_superuser') is not True:
            raise ValueError('Superuser must have is_superuser=True.')

        return self._create_user(email, password, **extra_fields)


class User(AbstractUser):
    username           = None
    fortnox_external_id = models.IntegerField()
    gpg_public_key      = models.CharField(null=True, max_length=4096)
    ssh_public_key      = models.CharField(null=True, max_length=4096)
    last_login          = models.DateField(null=True)
    cos_id              = models.CharField(null=True, max_length=4096)
    cos_contractid      = models.CharField(null=True, max_length=4096)
    cos_anlaggningsid   = models.CharField(null=True, max_length=4096)
    USERNAME_FIELD = 'email'
    REQUIRED_FIELDS = ['fortnox_external_id']
    objects = UserManager() ## This is the new line in the User model. ##

class vps(models.Model):
    user = models.ForeignKey(to=User, on_delete=models.CASCADE)
    uuid = models.CharField(max_length=4096)
    
class physical_server(models.Model):
    user = models.ForeignKey(to=User, on_delete=models.CASCADE)
    rack = models.CharField(max_length=4096)
    unit = models.IntegerField()

class IP(models.Model):
    user = models.ForeignKey(to=User, on_delete=models.CASCADE)
    cidr = models.CharField(max_length=4096)


# graph resources
#  port on device (realtime) autodetect on description(Cust: fortnox_external_id)
#  cpu
#  memory
#  disks
#