"""
Base model with common fields
"""
from sqlalchemy import Column, DateTime, String, event
from sqlalchemy.sql import func
from app.database.base import Base


class TimestampMixin:
    """Mixin for created_at and updated_at timestamps"""
    created_at = Column(DateTime(timezone=True), server_default=func.now())
    updated_at = Column(DateTime(timezone=True), onupdate=func.now())


class BaseModel(Base, TimestampMixin):
    """Base model class"""
    __abstract__ = True


# Event listeners for adaptive cache integration
@event.listens_for(BaseModel, 'after_update', propagate=True)
def record_update(mapper, connection, target):
    """Record data updates for adaptive cache TTL calculation"""
    try:
        from app.services.adaptive_cache import record_data_update
        table_name = target.__tablename__
        record_data_update(table_name)
    except Exception:
        # Don't fail database operations if cache tracking fails
        pass


@event.listens_for(BaseModel, 'after_insert', propagate=True)
def record_insert(mapper, connection, target):
    """Record data inserts for adaptive cache TTL calculation"""
    try:
        from app.services.adaptive_cache import record_data_update
        table_name = target.__tablename__
        record_data_update(table_name)
    except Exception:
        # Don't fail database operations if cache tracking fails
        pass


@event.listens_for(BaseModel, 'after_delete', propagate=True)
def record_delete(mapper, connection, target):
    """Record data deletions for adaptive cache TTL calculation"""
    try:
        from app.services.adaptive_cache import record_data_update
        table_name = target.__tablename__
        record_data_update(table_name)
    except Exception:
        # Don't fail database operations if cache tracking fails
        pass