package cache

import (
	"fmt"
	"time"
)

const (
	ATTR_EXPIRE = "expire"
	ATTR_MGOLOG = "mgolog"
	ATTR_INSERT = "insert"

	OpenMgoLog = false //true表示不禁用Mgolog，即不传入WithDisabledMgoLog()时也表示禁用
)

type empty struct {
}

type OperationAttr struct {
	Name  string
	Value interface{}
}

type OperationAttrs []*OperationAttr

func (this OperationAttrs) Find(name string) *InterfaceResult {
	for _, v := range this {
		if v.Name == name {
			return NewInterfaceResult(v.Value, nil)
		}
	}

	if OpenMgoLog {
		return NewInterfaceResult(ATTR_MGOLOG, nil)
	}
	return NewInterfaceResult(nil, fmt.Errorf("Operationattrs not found err: %v", name))
}

//缓存过期时间设置
func WithExpire(t time.Duration) *OperationAttr {
	return &OperationAttr{
		Name:  ATTR_EXPIRE,
		Value: t,
	}
}

//禁用Mgolog操作
func WithDisabledMgoLog() *OperationAttr {
	return &OperationAttr{
		Name:  ATTR_MGOLOG,
		Value: empty{},
	}
}

//新记录插入操作
func WithND() *OperationAttr {
	return &OperationAttr{
		Name:  ATTR_INSERT,
		Value: empty{},
	}
}