"""Shared SQLModel base: UTC timestamps, no copy-paste across models."""

from datetime import UTC, datetime

from sqlalchemy import Column, DateTime
from sqlmodel import Field


def utcnow() -> datetime:
    return datetime.now(UTC)


def ts_column() -> Column:
    return Column(DateTime(timezone=True))


def ts_field(*, default_factory=utcnow) -> datetime:  # type: ignore[no-untyped-def]
    return Field(default_factory=default_factory, sa_column=ts_column())