from datetime import datetime, timezone

from sqlalchemy import DateTime, Numeric
from sqlalchemy.orm import Mapped, mapped_column


class IdMixin:
    id: Mapped[int] = mapped_column(primary_key=True)


class SoftDeleteMixin:
    is_deleted: Mapped[bool] = mapped_column(
        default=False,
        nullable=False,
    )


class CreatedAtMixin:
    created_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True),
        default=lambda: datetime.now(timezone.utc),
        nullable=False,
    )


class LastModifiedAtMixin:
    last_modified_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True),
        default=lambda: datetime.now(timezone.utc),
        nullable=False,
    )


class PriceMixin:
    price: Mapped[float] = mapped_column(Numeric(12, 2), comment="Стоимость")


class CostMixin:
    cost: Mapped[float] = mapped_column(Numeric(12, 2), comment="Себестоимость")