using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Net.NetworkInformation;
using System.Net;

namespace Mesnac.Basic
{
    /// <summary>
    /// Windows进程辅助类
    /// </summary>
    public class ProcessHelper
    {
        /// <summary>
        /// 判断是否已经存在运行的实例
        /// </summary>
        /// <returns>存在返回true，不存在返回false</returns>
        public static bool HaveRunningInstance()
        {
            System.Diagnostics.Process current = System.Diagnostics.Process.GetCurrentProcess();
            System.Diagnostics.Process[] processes = System.Diagnostics.Process.GetProcessesByName(current.ProcessName);
            if (processes.Length >= 2)
            {
                return true;
            }
            else
            {
                return false;
            }
        }
        /// <summary>
        /// 查询指定名称的进程是否存在
        /// </summary>
        /// <param name="processName">要查找的进程名称</param>
        /// <returns>存在返回true，不存在返回false</returns>
        public static bool FindByProcessName(string processName)
        {
            System.Diagnostics.Process[] processes = System.Diagnostics.Process.GetProcessesByName(processName);
            if (processes == null || processes.Length == 0)
            {
                return false;
            }
            else
            {
                return true;
            }
        }
        /// <summary>
        /// 检测端口是否被占用
        /// </summary>
        /// <param name="port">要检测的端口号</param>
        /// <returns>占用返回true，未被占用则返回false</returns>
        public static bool PortInUse(int port)
        {
            bool inUse = false;
            IPGlobalProperties ipProperties = IPGlobalProperties.GetIPGlobalProperties();
            IPEndPoint[] ipEndPoints = ipProperties.GetActiveTcpListeners();

            foreach (IPEndPoint endPoint in ipEndPoints)
            {
                if (endPoint.Port == port)
                {
                    inUse = true;
                    break;
                }
            }
            return inUse;
        }
    }
}