from django.contrib.auth.base_user import BaseUserManager
from django.utils.translation import ugettext_lazy as _


class CustomUserManager(BaseUserManager):
    """
    Custom user model manager where email is the unique identifiers
    for authentication instead of usernames.
    """

    def create_user(self, zeus_id, username, password=None, **extra_fields):
        """
        Create and save a User with the given email and password.
        """
        if zeus_id is None or username is None:
            raise ValueError(_('The zeus_id and username must be set'))
        user = self.model(zeus_id=zeus_id, username=username, password=password, **extra_fields)
        user.set_password(password)
        user.save()
        return user

    def create_superuser(self, zeus_id, username, 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(zeus_id, username, password, **extra_fields)