package system

import "time"

type SysParamChangeAction string

const (
	SysParamChangeActionCreate SysParamChangeAction = "create"
	SysParamChangeActionUpdate SysParamChangeAction = "update"
	SysParamChangeActionDelete SysParamChangeAction = "delete"
)

// SysParamChangeLog 参数变更审计（策略/开关等都落在 sys_params）
type SysParamChangeLog struct {
	ID             uint                 `json:"id" gorm:"primaryKey"`
	ParamID        uint                 `json:"paramId" gorm:"index;not null"`
	Key            string               `json:"key" gorm:"index;size:191;not null"`
	Action         SysParamChangeAction `json:"action" gorm:"type:varchar(16);index;not null"`
	OldValue       string               `json:"oldValue" gorm:"type:text"`
	NewValue       string               `json:"newValue" gorm:"type:text"`
	OperatorUserID uint                 `json:"operatorUserId" gorm:"index;not null"`
	CreatedAt      time.Time            `json:"createdAt" gorm:"index"`
}

func (SysParamChangeLog) TableName() string { return "sys_param_change_logs" }