using System;
using CacheManager.Core;
using CacheManager.Core.Internal;
using Kreta.Framework.Security;

namespace Kreta.Framework.Caching
{
    public sealed class LoginInfoCache : GenericCache<LoginInfo>
    {
        private static readonly string LoginInfoCacheKeyPrefix = $"{nameof(Kreta)}_{nameof(LoginInfoCache)}_";

        private static string GetCacheKey(string sessionId)
        {
            return $"{LoginInfoCacheKeyPrefix}{sessionId}";
        }

        public LoginInfoCache(CacheManager cacheManager) : base(cacheManager, nameof(LoginInfoCache))
        {
        }

        public int SessionTimeout { get; set; }

        public void PutLoginInfo(LoginInfo loginInfo)
        {
            Put(GetCacheKey(loginInfo.SessionID), loginInfo);
        }

        public void UpdateLoginInfo(LoginInfo loginInfo)
        {
            Update(GetCacheKey(loginInfo.SessionID), _ => loginInfo);
        }

        public void RemoveLoginInfo(string sessionId)
        {
            Remove(GetCacheKey(sessionId));
        }

        protected override void Cache_OnRemoveByHandle(object sender, CacheItemRemovedEventArgs e)
        {
            if (e.Key.StartsWith(LoginInfoCacheKeyPrefix, StringComparison.Ordinal) && e.Reason == CacheItemRemovedReason.Expired)
            {
                SDAServer.Instance.SessionManager.DeleteSession((LoginInfo)e.Value);
            }
        }

        public LoginInfo GetLoginInfo(string sessionId)
        {
            return Get(GetCacheKey(sessionId));
        }

        public bool IsExistsLoginInfo(string sessionId)
        {
            return Exists(GetCacheKey(sessionId));
        }

        public void Ping(string sessionId)
        {
            Expire(GetCacheKey(sessionId), ExpirationMode.Sliding, new TimeSpan(0, SessionTimeout, 0));
        }
    }
}