import uuid
from datetime import datetime
from sqlalchemy import DateTime, String, func
from sqlalchemy.orm import Mapped, mapped_column
from app.models.types import GUID
class UUIDPrimaryKeyMixin:
    id: Mapped[uuid.UUID] = mapped_column(GUID(), primary_key=True, default=uuid.uuid4)
class TenantMixin:
    tenant_id: Mapped[uuid.UUID] = mapped_column(GUID(), nullable=False, index=True)
class TimestampMixin:
    created_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), server_default=func.now(), nullable=False)
    updated_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), server_default=func.now(), onupdate=func.now(), nullable=False)
class ActorAuditMixin:
    created_by: Mapped[str | None] = mapped_column(String(100))
    updated_by: Mapped[str | None] = mapped_column(String(100))
