using System.Reflection;
using Autofac;
using Autofac.Core;
using DotNetty.Codecs;
using DotNetty.Common.Internal.Logging;
using DotNetty.Handlers.Logging;
using DotNetty.Handlers.Timeout;
using DotNetty.Transport.Bootstrapping;
using DotNetty.Transport.Channels;
using DotNetty.Transport.Channels.Sockets;
using HybirdFrameworkCore.Autofac;
using HybirdFrameworkCore.Autofac.Attribute;
using log4net;
using Microsoft.Extensions.Logging;
using LogLevel = DotNetty.Handlers.Logging.LogLevel;

namespace HybirdFrameworkDriver.TcpClient;

public class TcpClient<TH, TD, TE> : IDisposable where TH : IChannelHandler
    where TD : ByteToMessageDecoder, new()
    where TE : ChannelHandlerAdapter, new()
{
    private static readonly ILog Log = LogManager.GetLogger(typeof(TcpClient<TH, TD, TE>));
    
    private Bootstrap? _bootstrap;
    private IEventLoopGroup? _eventLoopGroup;
    public IChannel? Channel { get; set; }

    public bool Connected { get; set; }

    public string Host { get; set; }
    public int Port { get; set; }
    
    public bool AutoReconnect { get; set; }
    public LogLevel? LogLevel { get; set; }
    

    public void InitBootstrap(string host, int port, Action? channelInactiveHandler = null)
    {
        Host = host;
        Port = port;

        if (LogLevel != null)
        {
            InternalLoggerFactory.DefaultFactory.AddProvider(new Log4NetProvider());
        }
       
        _bootstrap = new Bootstrap();
        _eventLoopGroup = new MultithreadEventLoopGroup();
        _bootstrap
            .Group(_eventLoopGroup)
            .Channel<TcpSocketChannel>()
            .Option(ChannelOption.TcpNodelay, true)
            .Handler(new ActionChannelInitializer<ISocketChannel>(channel =>
            {
                var clientListenerHandler = new ClientListenerHandler<TH, TD, TE>(this, AutoReconnect);

                var pipeline = channel.Pipeline;
                if (LogLevel != null)
                {
                    pipeline.AddLast(new LoggingHandler(LogLevel.Value));
                }
                // 监听器
                pipeline.AddLast(clientListenerHandler);
                pipeline.AddLast("idleStateHandler", new IdleStateHandler(30, 0, 0)); // 触发读取超时


                // 可以添加编解码器等
                ResolveDecode(pipeline);
                ResolveEncode(pipeline);

                ResolveHandler(pipeline);
            }));
    }


    private void ResolveEncode(IChannelPipeline pipeline)
    {
        pipeline.AddLast(new TE());
    }

    private void ResolveDecode(IChannelPipeline pipeline)
    {
        pipeline.AddLast(new TD());
    }

    private void ResolveHandler(IChannelPipeline pipeline)
    {
        var list = new List<Type>();

        foreach (var reg in AppInfo.Container.ComponentRegistry.Registrations)
        foreach (var service in reg.Services)
            if (service is TypedService ts)
                if (MatchHandlers(ts))
                    list.Add(ts.ServiceType);

        var handlers = new List<TH>();
        foreach (var type in list)
        {
            var resolve = AppInfo.Container.Resolve(type);
            handlers.Add((TH)resolve);
        }

        handlers.Sort((handler, msgHandler) =>
        {
            var orderAttribute1 = handler.GetType().GetCustomAttribute<OrderAttribute>();
            var orderAttribute2 = msgHandler.GetType().GetCustomAttribute<OrderAttribute>();
            var h1Order = orderAttribute1?.Order ?? 0;
            var h2Order = orderAttribute2?.Order ?? 0;
            return h1Order.CompareTo(h2Order);
        });
        foreach (var msgHandler in handlers) pipeline.AddLast(msgHandler);
    }

    private bool MatchHandlers(TypedService ts)
    {
        var interfaces = ts.ServiceType.GetInterfaces();
        if (interfaces.Length > 0)
            foreach (var type in interfaces)
                if (type == typeof(TH))
                    return true;

        return false;
    }


    public void BaseConnect()
    {
        Connected = false;
        Log.Info($"begin to connect {Host}:{Port}");

        while (!Connected)
        {
            try
            {
                Task<IChannel> task = _bootstrap!.ConnectAsync(Host, Port);
                Channel = task.Result;
                Connected = Channel.Open;
            }
            catch (Exception e)
            {
                Log.Info($"connect {Host}:{Port} {e}");
            }

            Log.Info($"connect {Host}:{Port} {Connected}");
            Thread.Sleep(1000);
        }
    }
    
    public void Close()
    {
        this.Channel?.CloseAsync().Wait();
        this.Channel?.CloseCompletion.Wait();
        _eventLoopGroup?.ShutdownGracefullyAsync().Wait();
    }

    public void Dispose()
    {
        this.Close();
        this.Connected = false;
    }
}