using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Net;
using System.Net.NetworkInformation;
using System.Net.Sockets;
using System.Threading;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Mvc.RazorPages;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.Localization;
using webapp_shared;

namespace webapp_local.Pages.InfoTech
{
    public class ServerLoginsModel : _LayoutModel
    {


        public string TextToBeWritten { get; set; }
        public ServerLoginsModel(IStringLocalizer<_LayoutModel> _localizer, IConfiguration _config) : base(_localizer, _config)
        {
        }

        public override void OnGet()
        {
            base.OnGet();

            if (!Permissions.CanViewVisitorsRegister)
            {
                // Redirect a 404
                Response.Redirect("/Error");
            }

            TextToBeWritten = "<div>Pinging... <br></div>";

            //ip da teneresott'occhio 172.16.94.1-254
            string ipBase = "172.16.94.";
            for (int i = 30; i < 40; i++)
            {
                string ip = ipBase + i.ToString();

                Ping p = new Ping();
                var pingReply = p.Send(ip, 50);




                if (pingReply.Status != IPStatus.Success)
                    TextToBeWritten += "<hr class=\"solid\">" + "<div>" + "<span class=\"host-offline\">● </span>Offline " + ip + "<br>Host: Disconnesso" + "<br><br></div>";
                else
                {
                    //Machine is alive
                    TextToBeWritten += "<hr class=\"solid\">" + "<div>" + "<span class=\"host-online\">● </span>Online " + ip + "</div>";

                    IPAddress hostIPAddress = IPAddress.Parse(ip);
                    TextToBeWritten += "<div>";

                    //DNS hostbyaddress
                    try
                    {
                        IPHostEntry hostInfo = Dns.GetHostByAddress(hostIPAddress);
                        IPAddress[] address = hostInfo.AddressList;
                        String[] alias = hostInfo.Aliases;

                        TextToBeWritten += "Host: " + hostInfo.HostName + "<br>";


                        String CmdText = @"/c quser /server:" + ip;

                        Process proc = new Process
                        {
                            StartInfo = new ProcessStartInfo
                            {
                                FileName = "cmd.exe",
                                Arguments = CmdText,
                                UseShellExecute = false,
                                RedirectStandardOutput = true,
                                CreateNoWindow = true
                            }
                        };

                        proc.Start();
                        String line = proc.StandardOutput.ReadToEnd();

                        line = line.Replace("\r\n", "<br>" + System.Environment.NewLine);

                        line = line.Replace("NOMEUTENTE", "UTENTE");
                        line = line.Replace("NOMESESSIONE", "SESSIONE");

                        line = line.Replace("                   ", "&ensp;&ensp;");
                        line = line.Replace("             ", "&ensp;&ensp;");
                        line = line.Replace("            ", "&ensp;&ensp;");
                        line = line.Replace("       ", "&ensp;&ensp;");
                        line = line.Replace("   ", "&ensp;&ensp;");
                        line = line.Replace("  ", "&ensp;&ensp;");
                        line = line.Replace(" ", "&ensp;&ensp;");

                        TextToBeWritten += "User Actualy Logged:<br>" + line;


                    }
                    catch (Exception e)
                    {
                        TextToBeWritten += "DNS Resolution Error: " + e.Message;
                    }

                    TextToBeWritten += "</div>";

                }
            }
        }
    }
}