using System;
using System.Net;
using System.Net.Sockets;
using System.Text;
using System.Threading;
using System.Threading.Tasks;

namespace DT6 {
    // Client app is the one sending messages to a Server/listener.   
    // Both listener and client can send messages back and forth once a   
    // communication is established.  
    public class SocketClient {
        
        public static int Main(String[] args) {
            Received += (arg) => Console.Write("Received:" + arg);
            Task.Run(() => StartClient());
            Thread.Sleep(1000);
            Console.ReadKey();
            return 0;
        }
        
        public static event Action<string> Received;

        public static void StartClient() {
            try
            {
                using TcpClient client = new("localhost", 8000);
                using Stream stream = client.GetStream();
                using StreamReader reader = new(client.GetStream());
                using StreamWriter writer = new(client.GetStream());
                {
                    string line;
                    writer.WriteLine();

                    while ((line = reader.ReadLine()) != null)
                    {
                        Received?.Invoke(line);
                    }
                }
            }
            catch (Exception e)
            {
                Console.WriteLine(e.ToString());  
            }
        }
    }
}