from django.db import models
from django.utils import timezone
from django.contrib.auth.base_user import AbstractBaseUser
from django.contrib.auth.models import PermissionsMixin, UserManager
from django.contrib.auth.hashers import make_password
from django.utils.translation import gettext_lazy as _


INDUSTRY_UNKNOWN = "Unknown"


class LabsUserManager(UserManager):
    def _create_user(self, email, password, **extra_fields):
        """
        Create and save 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.password = make_password(password)
        user.save(using=self._db)
        return user

    def create_user(self, email=None, 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=None, password=None, **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):
    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."),
    )
    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)
    updated_at = models.DateTimeField(auto_now=True)
    name = models.CharField(max_length=100, null=True, blank=True)
    first_name = models.CharField(max_length=100, null=True, blank=True)
    last_name = models.CharField(max_length=100, null=True, blank=True)
    language_code = models.CharField(max_length=2, default="en")
    last_lab_code = models.CharField(max_length=20, null=True, blank=True)
    last_region_name = models.CharField(max_length=40, null=True, blank=True)
    last_tidb_version = models.CharField(max_length=20, null=True, blank=True)
    organization = models.CharField(max_length=100, null=True, blank=True)
    job_role = models.CharField(max_length=60, null=True, blank=True)
    country = models.CharField(max_length=60, null=True, blank=True)
    industry = models.CharField(
        max_length=60,
        default=INDUSTRY_UNKNOWN,
    )

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

    objects = LabsUserManager()

    class Meta:
        db_table = "auth_user"

    def __str__(self):
        return f"User: {self.email}"

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

    def get_full_name(self):
        """
        Return the first_name plus the last_name, with a space in between.
        """
        return self.name

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

    @property
    def is_pingcap_employee(self) -> bool:
        return self.email.strip().lower().endswith("@pingcap.com")