using System;
using Nancy;
using Nancy.LightningCache.Projection;
using Newtonsoft.Json;
using Sony.Filtr.DistributedCaching;

namespace Sony.Filtr.AdminAPI.Config
{
    public class DistributedCacheStore : Nancy.LightningCache.CacheStore.ICacheStore
    {
        private const string Prefix = "LightningCacheStore-1.6";
        private readonly DistributedCacheHandler _distributedCacheHandler;

        public DistributedCacheStore(DistributedCacheHandler distributedCacheHandler)
        {
            _distributedCacheHandler = distributedCacheHandler;
        }

        public CachedResponse Get(string key)
        {
            var responseString = _distributedCacheHandler.Get(Prefix + key) as string;
            if (responseString != null)
            {
                var response = JsonConvert.DeserializeObject<SerializableResponse>(responseString);
                if (response != null)
                { 
                    return new CachedResponse(response);
                }
            }
                
            return null;
        }

        public void Remove(string key)
        {
            _distributedCacheHandler.Remove(Prefix + key);
        }

        public void Set(string key, NancyContext context, DateTime absoluteExpiration)
        {
            var objectJson = Newtonsoft.Json.JsonConvert.SerializeObject(new SerializableResponse(context.Response, absoluteExpiration));
            _distributedCacheHandler.Put(Prefix + key, objectJson, absoluteExpiration);
        }
    }
}