using DotNetty.Transport.Bootstrapping;
using DotNetty.Transport.Channels;
using Microsoft.Extensions.Hosting;
using Microsoft.Extensions.Logging;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Text;
using System.Threading.Tasks;

namespace NearCardAttendance.TcpServer
{
    public class Server : BackgroundService
    {
        private readonly ILogger<Server> _logger;
        //private readonly IServiceProvider _serviceProvider;
        private readonly ServerBootstrap _serverBootstrap;
       // private IChannel _serverChannel = default!;
        private CancellationTokenSource _tokenSource = null!;

       
        public Server(
            ILogger<Server> logger,
            ServerBootstrap serverBootstrap,
            IServiceProvider serviceProvider)
        {
            _logger = logger;
            //_serviceProvider = serviceProvider;
            _serverBootstrap = serverBootstrap;
           
        }
        public override Task StartAsync(CancellationToken cancellationToken)
        {
            _logger.LogInformation("------StartAsync");
            _tokenSource = CancellationTokenSource.CreateLinkedTokenSource(cancellationToken);
            return base.StartAsync(cancellationToken);
        }

        public override Task StopAsync(CancellationToken cancellationToken)
        {
            _logger.LogInformation("------StopAsync");
            _tokenSource.Cancel();  //停止工作线程
            return base.StopAsync(cancellationToken);
        }
        protected override async Task ExecuteAsync(CancellationToken stoppingToken)
        {

            _logger.LogInformation("DotNetty server starting...");

            //var address = new IPEndPoint(IPAddress.Any, 12345);

            //IChannel _serverChannel = await _serverBootstrap.BindAsync(address);

            string ipAddress = "0.0.0.0";
            int port = 16662;
            var endPoint = new IPEndPoint(IPAddress.Parse(ipAddress), port);
            IChannel _serverChannel = await _serverBootstrap.BindAsync(endPoint);
            //  _serverChannel.GetAttribute(MessageIdAttribute.Key).Set("SomeRequestId");

            //_logger.LogInformation("DotNetty server started on {0}.", address);
            _logger.LogInformation("DotNetty server started on {0}.", endPoint);
           

            // Wait until the service is stopped
            stoppingToken.WaitHandle.WaitOne();

            _logger.LogInformation("DotNetty server stopping...");

            // Close the server channel and release resources
            await _serverChannel.CloseAsync();
            _logger.LogInformation("DotNetty server stopped.");
        }


    }
}