"""
系统配置模型
"""
from sqlalchemy import Column, Integer, String, DateTime, Boolean, Text, JSON
from sqlalchemy.sql import func

from .base import Base


class SystemConfig(Base):
    """系统配置表"""
    __tablename__ = "system_configs"
    
    id = Column(Integer, primary_key=True, autoincrement=True, comment="配置 ID")
    
    # 配置键值
    config_key = Column(String(100), unique=True, nullable=False, index=True, comment="配置键")
    config_value = Column(JSON, nullable=False, comment="配置值（JSON 格式）")
    config_type = Column(String(50), comment="配置类型（schedule/limit/probability等）")
    
    # 描述信息
    description = Column(Text, comment="配置描述")
    
    # 状态
    is_active = Column(Boolean, default=True, comment="是否启用")
    
    # 时间戳
    created_at = Column(DateTime, server_default=func.now(), comment="创建时间")
    updated_at = Column(DateTime, server_default=func.now(), onupdate=func.now(), comment="更新时间")
    
    def __repr__(self):
        return f"<SystemConfig(id={self.id}, key='{self.config_key}')>"