using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Net.Sockets;
using System.Threading;

namespace SocketProcess
{
    public class SocketBusness
    {
        public delegate void delRecive(string barcode, object o);
        public delRecive ReciveEvent;
        public SocketBusness()
        {
            SocketServer.Instance.AcceptCallback += NewClient;
            SocketServer.Instance.ReadCallback += RecieveAfter;
            SocketServer.Instance.SendCallback += SendAfter;
        }
        public void Start()
        {
            SocketServer.Instance.StartService(8000);
        }

        public void Send(StateObject state, string msg)
        {
            SocketServer.Instance.Send(state.workSocket,msg);
        }

        public void BeginRecieve(StateObject state)
        {
            SocketServer.Instance.Recieve(state);
        }

        public void NewClient(IAsyncResult ar)
        {
            // Signal the main thread to continue.     
            SocketServer.Instance.allDone.Set();
            // Get the socket that handles the client request.     
            Socket listener = (Socket)ar.AsyncState;

            Socket handler = listener.EndAccept(ar);

            // Create the state object.     
            StateObject state = new StateObject();
            state.workSocket = handler;
            SocketServer.Instance.ListenerList.Add(state);
            BeginRecieve(state);
            Console.WriteLine("One Client Connection : ");
        }

        public void RecieveAfter(IAsyncResult ar)
        {
            String content = String.Empty;
            // Retrieve the state object and the handler socket     
            // from the asynchronous state object.     
            StateObject state = (StateObject)ar.AsyncState;
            Socket handler = state.workSocket;
            try
            {
                // Read data from the client socket.     
                int bytesRead = handler.EndReceive(ar);
                if (bytesRead > 0)
                {
                    // There might be more data, so store the data received so far.    
                    state.sb.Remove(0, state.sb.Length);
                    state.sb.Append(Encoding.ASCII.GetString(state.buffer, 0, bytesRead));
                    Console.WriteLine("Recieve Data: {0}", state.sb.ToString());
                    foreach (StateObject so in SocketServer.Instance.ListenerList)
                    {
                        if (so.workSocket == handler)
                        {
                            so.connectFlag = true;
                        }
                    }
                    if (ReciveEvent != null)
                    {
                        ReciveEvent(state.sb.ToString(), state);
                    }

                }
            }
            catch
            {

            }
            finally
            {
                BeginRecieve(state);
            }
            
        }

        public void SendAfter(IAsyncResult ar)
        {
            try
            {
                Socket handler = (Socket)ar.AsyncState;
                //int bytesSent = handler.EndSend(ar);
                //Console.WriteLine("Sent {0} bytes to client.", bytesSent);

                //handler.Shutdown(SocketShutdown.Both);
                //handler.Close();
            }
            catch (Exception e)
            {
                Console.WriteLine(e.ToString());
            }
        }

        public void HeartBeat()
        {
            foreach (StateObject so in SocketServer.Instance.ListenerList)
            {
                Send(so, "heartBeat");
                so.connectFlag = false;
                BeginRecieve(so);
            }
        }

    }
}