"""
Base Model with common fields
"""
from datetime import datetime
from sqlalchemy import Column, Integer, DateTime, Boolean
from sqlalchemy.orm import declarative_base

Base = declarative_base()


class TimestampMixin:
    """Mixin for created_at and updated_at timestamps"""
    created_at = Column(DateTime, default=datetime.utcnow, nullable=False)
    updated_at = Column(DateTime, default=datetime.utcnow, onupdate=datetime.utcnow, nullable=False)


class SoftDeleteMixin:
    """Mixin for soft delete functionality"""
    is_deleted = Column(Boolean, default=False, nullable=False)
    deleted_at = Column(DateTime, nullable=True)