package simulator

import (
	"src.dualinventive.com/go/lib/kv"
)

// Storage for key values
type Storage interface {
	Set(key string, value interface{}) error
	Get(key string) (interface{}, error)
	Del(key string) error
}

// KVStorage wraps a single Storage onto a dinet DeviceUID
type KVStorage struct {
	deviceUID string
	storage   kv.KV
}

// NewKVStorage create a dinet/kv storage bound onto DeviceUID
func NewKVStorage(deviceUID, KVType, KVParam string) (Storage, error) {
	kvstorage, err := kv.New(KVType, KVParam)
	if err != nil {
		return nil, err
	}
	return &KVStorage{deviceUID: deviceUID, storage: kvstorage}, nil
}

// Set a value for key
func (k *KVStorage) Set(key string, value interface{}) error {
	return k.storage.HSet(k.deviceUID, key, value)
}

// Get a value for key
func (k *KVStorage) Get(key string) (interface{}, error) {
	return k.storage.HGet(k.deviceUID, key)
}

// Del a key/value
func (k *KVStorage) Del(key string) error {
	return k.storage.HDel(k.deviceUID, key)
}