using Microsoft.Extensions.Caching.Memory;
using System;
using System.Collections.Generic;



namespace Admin.Core.Common
{
    public class CacheUtil : ICaching
    {
        //引用Microsoft.Extensions.Caching.Memory;这个和.net 还是不一样，没有了Httpruntime了
        private readonly IMemoryCache _cache;
        //还是通过构造函数的方法，获取
        public CacheUtil(IMemoryCache cache)
        {
            _cache = cache;
        }

        /// <summary>
        /// 取缓存项，如果不存在则返回空
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="cacheKey"></param>
        /// <returns></returns>
        public T Get<T>(string cacheKey)
        {
            try
            {
                return (T)_cache.Get(cacheKey);
            }
            catch
            {
                return default;
            }
        }

        /// <summary>
        /// 使用键和值将某个缓存项插入缓存中，并指定基于时间的过期详细信息
        /// </summary>
        /// <param name="cacheKey"></param>
        /// <param name="cacheValue"></param>
        /// <param name="timeSpan"></param>
        public void Set(string cacheKey, object cacheValue, int timeSpan)
        {
            // 缓存过期时间：分钟
            var cacheTimeOut = Appsettings.app(new string[] { "AppSettings", "CacheTimeOut" }).ObjToInt();
            _cache.Set(cacheKey, cacheValue, TimeSpan.FromSeconds(timeSpan == 0 ? cacheTimeOut : timeSpan * 60));
        }

        /// <summary>
        /// 移除指定键的缓存项
        /// </summary>
        /// <param name="key"></param>
        public void Remove(string key)
        {
            _cache.Remove(key);
        }
               
    }
}