/********************************************************************************
 *	文件名：SocketAPI.cs
 *	全路径：	\NetWork\SocketAPI\SocketAPI.cs
 *	创建人：	王华
 *	创建时间：2013-11-29
 *
 *	功能说明： SocketAPI类，提供了连接，收，发几个接口
 *	       
 *	修改记录：王迪 2014.02.14 注释掉ClientSocket.Disconnect(false);
*********************************************************************************/

using System.Net.Sockets;
using System;
using System.Net;
using System.Security;
using Module.Log;


namespace SPacket.Socket_API
{
    public class SocketAPI
    {
        public static Socket Connect(string serverIp, int nPort, ref string result)
        {
            try
            {
                IPAddress ipaddr;
                if (IPAddress.TryParse(serverIp, out ipaddr))
                {
                }
                else
                {
                    //var ipAddrs = Dns.GetHostAddresses(ServerIP);
                    var ipAddrs = Dns.GetHostAddresses(serverIp);
                    if (ipAddrs.Length > 0) ipaddr = ipAddrs[0];
                }
                LogModule.DebugLog("ipaddr:" + ipaddr);
                var socket = new Socket(ipaddr.AddressFamily, SocketType.Stream, ProtocolType.Tcp);
                var tempRemoteIP = new IPEndPoint(ipaddr, nPort);
                var epTemp = tempRemoteIP;
                socket.Connect(epTemp);
                return socket;
            }
            catch (SocketException e)
            {
                result = e.ToString();
            }
            catch (ArgumentOutOfRangeException e)
            {
                result = e.ToString();
            }
            catch (ArgumentNullException e)
            {
                result = e.ToString();
            }
            catch (ObjectDisposedException e)
            {
                result = e.ToString();
            }
            catch (InvalidOperationException e)
            {
                result = e.ToString();
            }
            catch (SecurityException e)
            {
                result = e.ToString();
            }
            catch (Exception e)
            {
                result = e.ToString();
            }

            return null;
        }

        public static uint Send(Socket client, byte[] buff, uint nLen, SocketFlags flags = SocketFlags.None)
        {
            try
            {
                // Byte[] bytesSent = Encoding.ASCII.GetBytes(buff);
                return (uint) client.Send(buff, (int) nLen, flags);
            }
            catch (SocketException e)
            {
                Console.WriteLine(e.ToString());
                //LogModule.ErrorLog(e.ToString());
            }

            return 0xFFFFFFFF;
        }

        public static void Close(Socket ClientSocket)
        {
            try
            {
                if (ClientSocket.Connected) ClientSocket.Shutdown(SocketShutdown.Both);
            }
            catch (SocketException e)
            {
                LogModule.ErrorLog(e.ToString());
            }

            try
            {
                ClientSocket.Close();
            }
            catch (SocketException e)
            {
                LogModule.ErrorLog(e.ToString());
            }
        }

        public static uint Recv(Socket client, byte[] buff, uint nLen, uint flags = 0)
        {
            try
            {
                uint bytes = 0;

                bytes = (uint) client.Receive(buff, (int) nLen, (SocketFlags) flags);
                // buff += Encoding.ASCII.GetString(bytesReceived, 0, bytes);

                return bytes;
            }
            catch (SocketException e)
            {
                //Console.WriteLine(e.ToString());
                LogModule.ErrorLog(e.ToString());
            }

            return 0xFFFFFFFF;
        }

        public static uint available(Socket client)
        {
            return (uint) client.Available;
        }
    }
}