using Admin.Core.Common;
using Microsoft.Extensions.DependencyInjection;
using StackExchange.Redis;
using System;

namespace Admin.Core.Extensions
{
    /// <summary>
    /// Redis缓存 启动服务
    /// </summary>
    public static class RedisCacheSetup
    {
        public static void AddRedisCacheSetup(this IServiceCollection services)
        {
            if (services == null) throw new ArgumentNullException(nameof(services));

            services.AddTransient<IRedisBasketRepository, RedisBasketRepository>();

            // 配置启动Redis服务，虽然可能影响项目启动速度，但是不能在运行的时候报错，所以是合理的
            services.AddSingleton<ConnectionMultiplexer>(sp =>
               {
                   //获取连接字符串
                   string redisConfiguration = Appsettings.app(new string[] { "Redis", "ConnectionString" });

                   var configuration = ConfigurationOptions.Parse(redisConfiguration, true);

                   configuration.ResolveDns = true;

                   return ConnectionMultiplexer.Connect(configuration);
                   //return GetRedisConnection();
               });

        }

        /// <summary>
        /// 核心代码，获取连接实例
        /// 通过双if 加lock的方式，实现单例模式
        /// </summary>
        /// <returns></returns>
        public static ConnectionMultiplexer GetRedisConnection()
        {
            try
            {
                //获取连接字符串
                string redisConfiguration = Appsettings.app(new string[] { "Redis", "ConnectionString" });

                var config = new ConfigurationOptions
                {
                    AbortOnConnectFail = false,
                    AllowAdmin = true,
                    ConnectTimeout = 15000,//改成15s
                    SyncTimeout = 5000,
                    //Password = "Pwd",//Redis数据库密码
                    EndPoints = { redisConfiguration }// connectionString 为IP:Port 如”192.168.2.110:6379”
                };
                return ConnectionMultiplexer.Connect(config);
            }
            catch (Exception)
            {
                throw new Exception("Redis服务未启用，请开启该服务，并且请注意端口号，本项目使用的的6319，而且我的是没有设置密码。");
            }
        }

    }
}