import uuid
from datetime import datetime, timezone

from sqlalchemy import Column, DateTime
from sqlalchemy.dialects.postgresql import UUID

# noinspection PyUnresolvedReferences
from app.core.database import Base


class TimestampMixin:
    """Mixin to add created_at and updated_at timestamps to models"""
    created_at = Column(DateTime(timezone=True), default=lambda: datetime.now(timezone.utc), nullable=False)
    updated_at = Column(DateTime(timezone=True), default=lambda: datetime.now(timezone.utc),
                        onupdate=lambda: datetime.now(timezone.utc), nullable=False)


class UUIDMixin:
    """Mixin to add UUID primary keys to models"""
    id = Column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)