from __future__ import unicode_literals

from django.contrib.auth.models import (AbstractBaseUser,
                                        BaseUserManager,
                                        PermissionsMixin,)
from django.core.mail import send_mail
from django.db import models
from django.utils import timezone
from django.utils.translation import ugettext_lazy as _

# Create your models here.


class UserManager(BaseUserManager):

  def _create_user(self, email, password,
                   is_staff, is_superuser,
                   **extra_fields):

    # Timestamp for the "date_joined" field
    now = timezone.now()
    # Ensure that an email has been provided
    if not email:
      raise ValueError('Email must be set')

    # This just makes sure email domain is lowercased
    email = self.normalize_email(email)

    # reads the is_active parameter if provided, or defaults to True.  This could be set to default to False
    # if you prefer to implement email verification to activate users
    is_active = extra_fields.pop("is_active", True)

    # create the user in the DB using the passed parameters and/or default values
    user = self.model(email=email, is_staff=is_staff, is_active=is_active, is_superuser=is_superuser,
                      date_joined=now, **extra_fields)

    # Sets the password using django's hashing/encryption
    user.set_password(password)

    # Save the user to the DB
    user.save(using=self._db)

    # returns the user instance
    return user

    def create_user(self, email, password=None, **extra_fields):
        is_staff = extra_fields.pop("is_staff", False)
        return self._create_user(email, password, is_staff, False,
                                 **extra_fields)

    def create_superuser(self, email, password, **extra_fields):
        # set is_staff and is_superuser to True for superuser
        return self._create_user(email, password, True, True,
                                 **extra_fields)


class User(AbstractBaseUser, PermissionsMixin):
    email = models.EmailField(_('email address'), max_length=255, unique=True, db_index=True)
    is_staff = models.BooleanField(_('staff status'), default=False, help_text=_('Designates whether the user can log into this admin site.'))
    is_active = models.BooleanField(_('active'), default=True, help_text=_('Designates whether this user should be treated as active. Unselect this instead of deleting accounts.'))
    date_joined = models.DateTimeField(_('date joined'),default=timezone.now)

    objects = UserManager()

    USERNAME_FIELD = 'email'
    REQUIRED_FIELDS = []

    class Meta:
        verbose_name = _('user')
        verbose_name_plural = _('users')

    def get_full_name(self):
        """Return the email."""
        return self.email

    def get_short_name(self):
        """Return the email."""
        return self.email

    def email_user(self, subject, message, from_email=None, **kwargs):
        """Send an email to this User."""
        send_mail(subject, message, from_email, [self.email], **kwargs)