"""
充值记录历史模型
用于记录充值记录的变更历史，支持审计和追溯
"""
from datetime import datetime
from app.utils.timezone import beijing_now_naive
from sqlalchemy import Column, Integer, String, DateTime, Text
from app.database import Base


class RechargeRecordHis(Base):
    """
    充值记录历史表
    用于记录 recharge_records 表的变更历史，支持：
    - 记录每次充值操作的详细信息
    - 追踪充值金额、天数变化
    - 安全审计和异常检测
    """
    __tablename__ = "recharge_records_his"

    id = Column(Integer, primary_key=True, autoincrement=True, comment="主键ID")
    user_id = Column(Integer, nullable=False, comment="用户ID")
    card_id = Column(Integer, nullable=False, comment="卡密ID")
    software_code = Column(String(50), nullable=False, comment="软件特征码")
    days = Column(Integer, nullable=False, comment="充值天数")
    expire_time_before = Column(DateTime, nullable=True, comment="充值前到期时间")
    expire_time_after = Column(DateTime, nullable=True, comment="充值后到期时间")
    created_at = Column(DateTime, default=beijing_now_naive, comment="创建时间")
    
    # 历史记录字段
    action_type = Column(String(20), nullable=False, comment="操作类型: INSERT/UPDATE/DELETE")
    changed_fields = Column(Text, nullable=True, comment="变更字段(JSON格式)")
    operator = Column(String(100), nullable=True, comment="操作者: system/user_id")
    record_id = Column(Integer, nullable=False, comment="原始记录ID")
    created_at_his = Column(DateTime, default=beijing_now_naive, comment="历史记录创建时间")

    def __repr__(self):
        return f"<RechargeRecordHis(id={self.id}, user_id={self.user_id}, action_type='{self.action_type}', created_at={self.created_at})>"