using System.Collections.Concurrent;
using System.Threading.Channels;
using DotNetty.Buffers;
using DotNetty.Handlers.Logging;
using DotNetty.Handlers.Timeout;
using DotNetty.Transport.Bootstrapping;
using DotNetty.Transport.Channels;
using DotNetty.Transport.Channels.Sockets;
using log4net;
using Module.Socket.Tool;

namespace HybirdFrameworkServices.Netty
{
    /// <summary>
    /// netty server
    /// </summary>
    public class Server : IDisposable
    {
        private readonly ILog Log = LogManager.GetLogger(typeof(Server));
        /// <summary>
        /// 接受客户端的连接
        /// </summary>
        static MultithreadEventLoopGroup? bossGroup;
        /// <summary>
        /// 处理已经被接受的连接
        /// </summary>
        static MultithreadEventLoopGroup? workerGroup;
        /// <summary>
        /// Netty服务器的启动辅助类，用于配置和启动服务器
        /// </summary>
        static ServerBootstrap? bootstrap;

        /// <summary>
        ///  是一个线程安全的字典，用于存储与客户端连接的通道（IChannel）。
        /// </summary>
        static ConcurrentDictionary<IChannelId, IChannel> _container = ServerListenerHandler.Container;

        private int _port = 9000;

        public Server(int port)
        {
            _port = port;
            IByteBuffer delimiter = Unpooled.CopiedBuffer(new byte[] { 0xAA, 0xF5 });

            bossGroup = new MultithreadEventLoopGroup();
            workerGroup = new MultithreadEventLoopGroup();
            bootstrap = new ServerBootstrap();
            bootstrap
                .Group(bossGroup, workerGroup) // 设置主和工作线程组
                .Channel<TcpServerSocketChannel>() // 设置通道模式为TcpSocket
                .Option(ChannelOption.SoKeepalive, true) //设置TCP连接socket,保持连接
                .Handler(new LoggingHandler())//添加log处理日志
                .ChildHandler(new ActionChannelInitializer<ISocketChannel>(channel =>
                {
                    var serverListenerHandler = new ServerListenerHandler();

                    IChannelPipeline pipeline = channel.Pipeline;
                    pipeline.AddLast(new LoggingHandler(""));
                    pipeline.AddLast(serverListenerHandler);
                    //pipeline.AddLast(new FixedLengthFrameDecoder(12)); //定长数据，12byte
                    pipeline.AddLast(new IdleStateHandler(0, 0, 180));//检测空闲连接
                                                                      //pipeline.AddLast(msgHandler);
                                                                      //业务handler ，这里是实际处理业务的Handler

                    pipeline.AddLast(new CustomFrameDecoder4(new IByteBuffer[] { delimiter }, false, false));

                    pipeline.AddLast("idleStateHandler", new IdleStateHandler(30, 0, 0)); // 触发读取超时
                                                                                          //pipeline.AddLast(new ReconnectHandler(this));
                                                                                          //pipeline.AddLast(new ClientHandler(this));
                }));

            Begin(_port);
        }


        private void Begin(int port)
        {
            _port = port;
            Log.Info(" Start Listen");
            Task<IChannel>? channel = bootstrap?.BindAsync(_port);
            Log.Info($"netty success listen {_port}");
        }

        public static void Send(byte[] bytes)
        {
            foreach (IChannel channel in _container.Values)
            {
                channel.WriteAndFlushAsync(bytes);
            }
        }



        /// <summary>
        /// ??netty   释放资源
        /// </summary>
        public void Dispose()
        {
            Log.Info(this + " Dispose");
            bossGroup?.ShutdownGracefullyAsync();
        }
    }
}