package cache

import (
	"github.com/hashicorp/golang-lru"
	"time"
)

type LruCache struct {
	c *lru.Cache
}

func NewLruCache(size int) (CacheInterface, error) {
	c, err := lru.New(size)

	if err != nil {
		return nil, err
	}

	return &LruCache{c: c}, nil
}

func (mc *LruCache) Has(key string) bool {
	_, exists := mc.c.Get(key)

	return exists
}

func (mc *LruCache) Get(key string, dst ...interface{}) ([]byte, error) {
	item, exists := mc.c.Get(key)

	if !exists {
		return nil, ErrMemoryCacheNotExists
	}

	return memoryCacheGet(item, dst...)
}

func (mc *LruCache) Set(key string, val interface{}, ttl time.Duration) error {
	mc.c.Add(key, val)
	return nil
}

func (mc *LruCache) Del(key string) error {
	mc.c.Remove(key)
	return nil
}