using DotNetty.Buffers;
using DotNetty.Handlers.Timeout;
using DotNetty.Transport.Channels;
using JSMachine.WMS.Infrastructure.Helper;
using JSMachine.WMS.Netty.Common.Util;
using JSMachine.WMS.Netty.NettyAsServer.Transport;
using System;

namespace JSMachine.WMS.Netty.NettyAsServer
{
    public class EchoServerChannelHandler : ChannelHandlerAdapter
    {
        private NettyServerTransport NettyTransport;

        public override void ChannelActive(IChannelHandlerContext context)
        {
            LogHelper.Info($"客户端 {context.ToIPInfo(AddressOnwer.Remote).IP} 已连接");
            NettyTransport = new NettyServerTransport(context);

            base.ChannelActive(context);
        }

        public override void ChannelRead(IChannelHandlerContext context, object message)
        {
            //LogsTool.Default.Info("收到服务端TCP信息");
            if(message is IByteBuffer byteBuffer)
            NettyTransport.ChannelReadHandle(byteBuffer);
        }

        public override void ChannelReadComplete(IChannelHandlerContext context) => context.Flush();

        public override void ExceptionCaught(IChannelHandlerContext context, Exception exception)
        {
            //LogsTool.Default.Error("Exception: " + exception);
            TransportManager.RemoveInActiveChannel(context);
            context.CloseAsync();
        }

        public override void HandlerAdded(IChannelHandlerContext context)
        {
            base.HandlerAdded(context);
        }

        public override void HandlerRemoved(IChannelHandlerContext context)
        {
            LogHelper.Warn($"客户端 {context.ToIPInfo(AddressOnwer.Remote).IP} 下线.");
            TransportManager.RemoveInActiveChannel(context);
            base.HandlerRemoved(context);
        }

        public override void UserEventTriggered(IChannelHandlerContext context, object evt)
        {
            IdleStateEvent eventState = evt as IdleStateEvent;

            if (eventState.State == IdleState.ReaderIdle)
            {
                //没有任何读取
                RemoveInactiveChannel();
            }
            else if (eventState.State == IdleState.WriterIdle)
            {
                //没有任何写入
                RemoveInactiveChannel();
            }
            else
            if (eventState.State == IdleState.AllIdle)
            {
                //没有任何交互
                RemoveInactiveChannel();
            }

            base.UserEventTriggered(context, evt);

            void RemoveInactiveChannel()
            {
                context.CloseAsync();
                TransportManager.RemoveInActiveChannel(context);
            }
        }
    }
}