from datetime import datetime

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


class TimestampMixin:
    """Mixin for common timestamp fields"""

    created_at: Mapped[datetime] = mapped_column(
        DateTime, nullable=False, default=func.now()
    )
    updated_at: Mapped[datetime] = mapped_column(
        DateTime, nullable=False, default=func.now(), onupdate=func.now()
    )
    deleted_at: Mapped[datetime | None] = mapped_column(DateTime, nullable=True)


class TenantScopedMixin:
    """Mixin for tenant and company scoped entities"""

    tenant_id: Mapped[int] = mapped_column(Integer, nullable=False, index=True)
    company_id: Mapped[int] = mapped_column(Integer, nullable=False, index=True)


class PedimentoRelatedMixin(TenantScopedMixin):
    """Mixin for entities related to pedimentos"""

    pedimento_id: Mapped[int] = mapped_column(Integer, nullable=False)