"""留存清理审计记录（仅保存脱敏标识）。"""
from sqlalchemy import BigInteger, Column, Index, Integer, String, Text, TIMESTAMP, func

from insurance.db.compat import db


AUDIT_ID_TYPE = BigInteger().with_variant(Integer, "sqlite")


class RetentionCleanupAudit(db.Model):
    __tablename__ = "insurance_retention_cleanup_audits"
    __table_args__ = (
        Index("idx_retention_audits_created", "created_at"),
        Index("idx_retention_audits_category_action", "category", "action"),
    )

    id = Column(AUDIT_ID_TYPE, primary_key=True, autoincrement=True)
    category = Column(String(30), nullable=False)
    target_type = Column(String(50), nullable=False)
    target_id_hash = Column(String(64), nullable=False)
    user_id_hash = Column(String(64), nullable=True)
    action = Column(String(20), nullable=False)
    reason = Column(String(200), nullable=False)
    metadata_json = Column(Text, nullable=True)
    created_at = Column(TIMESTAMP, server_default=func.now())

    def to_public_dict(self):
        import json
        try:
            metadata = json.loads(self.metadata_json) if self.metadata_json else {}
        except (TypeError, ValueError):
            metadata = {}
        return {
            "id": self.id, "category": self.category, "targetType": self.target_type,
            "targetIdHash": self.target_id_hash, "action": self.action,
            "reason": self.reason, "metadata": metadata,
            "createdAt": self.created_at.isoformat() if self.created_at else None,
        }