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


class NelUserManager(BaseUserManager):
    use_in_migrations = True

    def _create_user(self, email, password, **extra_fields):
        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()
        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)
        extra_fields.setdefault("is_active", 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 NelUser(AbstractBaseUser, PermissionsMixin):
    email = models.EmailField(_("email"), unique=True, null=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=False,
        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)
    nsfw_allowed = models.BooleanField(
        _("NSFW flag"),
        default=False,
        help_text=_(
            "Indicate whether or not adult or sensitive content should " "be displayed."
        ),
    )

    objects = NelUserManager()

    EMAIL_FIELD = "email"
    USERNAME_FIELD = "email"
    REQUIRED_FIELDS = []

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

    def __str__(self):
        return self.email.strip()

    def clean(self):
        super().clean()
        self.email = self.__class__.objects.normalize_email(self.email)

    def get_full_name(self):
        return self.email.strip()

    def get_short_name(self):
        return self.email.strip()

    def email_user(self, subject, message, from_email=None, **kwargs):
        send_mail(subject, message, from_email, [self.email], **kwargs)