using Newtonsoft.Json;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Net.Sockets;
using System.Text;
using System.Threading.Tasks;

namespace WindowsFormsApp2
{
    /// <summary>
    /// 发送接收消息帮助类
    /// </summary>
    public  class UDP_CLIENT_HELPER
    {
        static Socket client;
        private  string _ip_server = string.Empty;
        private  int _port_server = 6001;
        private string _ip_client = string.Empty;
        private int _port_client = 6000;
        public UDP_CLIENT_HELPER(string _Ip_server, int _Port_server, string _Ip_client, int _Port_client)
        {
            this._ip_server = _Ip_server;
            this._port_server = _Port_server;
            this._ip_client = _Ip_client;
            this._port_client = _Port_client;
            if (client == null)
            {
                client = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
                client.Bind(new IPEndPoint(IPAddress.Parse(_ip_client), _port_client));
            }
        }

        /// <summary>
        /// 发送消息
        /// </summary>
        /// <param name="message"></param>
        public void sendMsg(string message)
        {
            //绑定服务器端口和ip并发送
            EndPoint point = new IPEndPoint(IPAddress.Parse(_ip_server), _port_server);
            client.SendTo(Encoding.UTF8.GetBytes(message), point);
        }

        /// <summary>
        /// 接收消息
        /// </summary>
        public void ReciveMsg()
        {
            while (true)
            {
                //循环接收服务器发来的消息  并返回JObject对象
                EndPoint point = new IPEndPoint(IPAddress.Any, 0);
                byte[] buffer = new byte[1024];
                int length = client.ReceiveFrom(buffer, ref point);//接收数据报
                string message = Encoding.UTF8.GetString(buffer, 0, length);
                Newtonsoft.Json.Linq.JObject obj = (Newtonsoft.Json.Linq.JObject)JsonConvert.DeserializeObject(message);
                string type = obj["message"]["type"].ToString();
            }
        } 
    }
}