from django.db import models
from django.contrib.auth.models import AbstractBaseUser, BaseUserManager, PermissionsMixin

class UserManager(BaseUserManager):
    """
    Custom user manager for authentication
    """
    def create_user(self, email, password=None, **extra_fields):
        if not email:
            raise ValueError('The email field is required.')
        email = self.normalize_email(email)
        user = self.model(email=email, **extra_fields)
        user.set_password(password)
        user.save(using=self._db)
        return user

class User(AbstractBaseUser, PermissionsMixin):
    """
    Custom user model with email as the unique identifier
    """
    email = models.EmailField(unique=True, max_length=255)
    is_active = models.BooleanField(default=True)
    is_staff = models.BooleanField(default=False)
    is_superuser = models.BooleanField(default=False)

    objects = UserManager()

    USERNAME_FIELD = 'email'
    REQUIRED_FIELDS = []

    def __str__(self):
        return self.email