from django.contrib.auth.base_user import AbstractBaseUser
from django.db import models
from django.contrib.auth.models import AbstractUser, PermissionsMixin
from jokes.models import Joke
from django.utils.translation import ugettext_lazy as _

from django.contrib.auth.models import BaseUserManager


class CustomUserManager(BaseUserManager):
    use_in_migrations = True

    def _create_user(self, email, password, **extra_fields):
        """
        Creates and saves 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):
        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):
        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(AbstractBaseUser, PermissionsMixin):
    likes = models.ManyToManyField(Joke, verbose_name=_('понравившиеся'), related_name='liked')
    favourites = models.ManyToManyField(Joke, verbose_name=_('избранное'), related_name='favoured')

    first_name = models.CharField(_('first name'), max_length=30, blank=True)
    last_name = models.CharField(_('last name'), max_length=30, blank=True)
    email = models.EmailField(_('email address'), unique=True)
    is_staff = models.BooleanField(
        _('staff status'),
        default=False,
        help_text=_('Designates whether the user can log into this admin site.'),
    )

    objects = CustomUserManager()

    USERNAME_FIELD = 'email'
    REQUIRED_FIELDS = []

    class Meta(AbstractBaseUser.Meta):
        swappable = 'AUTH_USER_MODEL'
        verbose_name = _('user')
        verbose_name_plural = _('users')

    def get_full_name(self):
        """
        Returns the first_name plus the last_name, with a space in between.
        """
        full_name = '%s %s' % (self.first_name, self.last_name)
        return full_name.strip()

    def get_short_name(self):
        """Returns the short name for the user."""
        return self.first_name