import uuid
from datetime import datetime

from sqlalchemy import DateTime, func
from sqlalchemy.orm import DeclarativeBase, Mapped, mapped_column

from app.models.types import GUID


class Base(DeclarativeBase):
    pass


class BaseModel(Base):
    """Common columns shared by every table: UUID id and timestamps."""

    __abstract__ = True

    id: Mapped[uuid.UUID] = mapped_column(
        GUID, primary_key=True, default=uuid.uuid4
    )
    created_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), server_default=func.now(), nullable=False, index=True
    )
    updated_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), server_default=func.now(), onupdate=func.now(), nullable=False
    )