"""Base model and mixins for all CartSnitch ORM models."""

import uuid
from datetime import datetime

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


class Base(DeclarativeBase):
    """Base class for all CartSnitch models."""


class TimestampMixin:
    """Mixin providing created_at / updated_at columns."""

    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 UUIDPrimaryKeyMixin:
    """Mixin providing a UUID primary key."""

    id: Mapped[uuid.UUID] = mapped_column(
        primary_key=True, default=uuid.uuid4, server_default=func.gen_random_uuid()
    )