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


class User(AbstractUser):
    """Custom User model using email as the unique identifier."""

    email = models.EmailField(
        unique=True,
        max_length=254,
        help_text="Email address used for authentication.",
    )
    username = models.CharField(
        max_length=150,
        blank=True,
        null=True,
        help_text="Optional display name. Not used for authentication.",
    )

    USERNAME_FIELD = "email"
    REQUIRED_FIELDS: list[str] = []

    class Meta:
        db_table = "accounts_user"
        verbose_name = "User"
        verbose_name_plural = "Users"

    def __str__(self) -> str:
        return self.email