package myRedis

import (
	"fmt"
	"time"
)

const (
	AttrExpr = "expr"
	AttrNx   = "nx"
	AttrXx   = "xx"
)

type empty struct {
}

type OperationAttr struct {
	Name  string
	Value interface{}
}

type OperationAttrs []*OperationAttr

func (t OperationAttrs) Find(name string) *InterfaceResult {
	for _, attr := range t {
		if attr.Name == name {
			return NewInterfaceResult(attr.Value, nil)
		}
	}
	return NewInterfaceResult(nil, fmt.Errorf("OperationAttrs found error:%s", name))
}

func WithExpire(t time.Duration) *OperationAttr {
	return &OperationAttr{
		Name:  AttrExpr,
		Value: t,
	}
}

func WithNX() *OperationAttr {
	return &OperationAttr{
		Name:  AttrNx,
		Value: empty{},
	}
}

func WithXX() *OperationAttr {
	return &OperationAttr{
		Name:  AttrXx,
		Value: empty{},
	}
}