from sqlalchemy import Column, String, DateTime, ForeignKey, JSON
from sqlalchemy.sql import func
from app.core.database.db_session import Base

class AuditLog(Base):
    __tablename__ = "audit_logs"

    audit_id = Column(String(26), primary_key=True)
    request_id = Column(String(50), nullable=False)
    user_id = Column(String(26), ForeignKey("users.user_id", ondelete="SET NULL"), nullable=True)
    entity_type = Column(String(50), nullable=False)
    entity_id = Column(String(50), nullable=False)
    action = Column(String(30), nullable=False)
    old_value = Column(JSON, nullable=True)
    new_value = Column(JSON, nullable=True)
    ip_address = Column(String(45), nullable=False)
    user_agent = Column(String(255), nullable=True)
    created_at = Column(DateTime, server_default=func.now())