from django.contrib.auth.models import BaseUserManager 
from django.utils.translation import gettext_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)