from __future__ import annotations

from datetime import datetime
from typing import ClassVar

from sqlalchemy import BigInteger, DateTime, Integer, func
from sqlalchemy.orm import Mapped, mapped_column

from app.extensions import db

ID_TYPE = BigInteger().with_variant(Integer, "sqlite")


class TimestampMixin:
    created_at: Mapped[datetime] = mapped_column(
        DateTime,
        nullable=False,
        server_default=func.now(),
    )
    updated_at: Mapped[datetime] = mapped_column(
        DateTime,
        nullable=False,
        server_default=func.now(),
        onupdate=func.now(),
    )


class BaseModel(db.Model):
    __abstract__: ClassVar[bool] = True