from django.db import models
from django.contrib.auth.models import AbstractUser, BaseUserManager


class UserManager(BaseUserManager):
    def create_user(self, email, password=None, **extra_fields):
        if not email:
            raise ValueError('O email é obrigatório')
        user = self.model(email=email, **extra_fields)
        user.set_password(password)
        user.save(using=self._db)
        return user

    def create_superuser(self, email, 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 precisa ter is_staff=True.')
        if extra_fields.get('is_superuser') is not True:
            raise ValueError('Superuser precisa ter is_superuser=True.')

        return self.create_user(email, password, **extra_fields)

def avatar_upload_to(instance, filename):
    return f'usuarios/avatar/{instance.id}/{filename}'

class Usuario(AbstractUser):
    avatar = models.ImageField(upload_to=avatar_upload_to, blank=True, null=True)
    bio = models.TextField(blank=True, null=True)
    email = models.EmailField(unique=True)
    is_escritor = models.BooleanField(default=False)
    is_leitor_especial = models.BooleanField(default=False)

    username = None
    USERNAME_FIELD = 'email'
    REQUIRED_FIELDS = []


    objects = UserManager()

    class Meta:
        verbose_name = 'Usuario'
        verbose_name_plural = 'Usuarios'

    def __str__(self):
        return self.email