#!/usr/local/bin/perl


use IO::Socket;
use IO::Select;
use Win32::API;
use win32;
#use strict;
#use warnings;

my $server = IO::Socket::INET->new(
                                   LocalPort => 2005,
                                   type =>SOCK_STREAM,
                                   Reuse => 1,
                                   Listen => 10
                                   ) or die "Server läuft nicht: $@\n";
my $select = IO::Select->new($server);
while(my @readable = $select->can_read) 
       {
       foreach my $socket (@readable) 
                {
                if($socket == $server) 
                       {
                        my $client = $socket->accept;
                        print "New client connects\n";
                        $select->add($client);
                        $client->print("Welcome\n");
                       }
                else 
                       {
                        my $computername = $socket->getline;
                        if (defined $computername)
                                {
                                chomp $computername;
                                my $WindowAvailable ="";
                                $WindowAvailable = FindWindow("$computername");
                                print "$WindowAvailable\n";
               
 
                                if ($WindowAvailable == 0)
                                       {
                                       #$client->print ("Window ist nicht vorhanden\n");
                                        my $programmpfad = $0; 
                                        $programmpfad =~ s/[^\\]*?$//;
                                        system "start \"$computername\" cmd.exe";
                                        $socket->print("reconnect\n");
                                        $socket->print("port=12346\n");
                                        #delete_socket($select, $socket);
                                        }
                                else
                                        {
                                        $socket->print ("Window ist vorhanden\n");
                                        $socket->print("process still running\n");
                                        $socket->print("port=2005\n");
                                        }
                                }
                          else
                                {
                                print "Client says: [$computername]\n";
                                }
                      } 
        
                 }
        }


sub FindWindow
    {
    my $WindowName = shift(@_);
    chomp $WindowName;
    print "$WindowName";
    my $FindWindow = new Win32::API('user32', 'FindWindow', [P,P], N);# or die print "$!";
    my $name = 'Telnet 127.0.0.1';
    my $class = 0;
    my $topHwnd = $FindWindow->Call($class, $WindowName);
    print "$topHwnd\n";
    return $topHwnd;
    }

sub delete_socket 
    {
    my ($sel, $sock) = @_;
    $sel->remove($sock);
    $sock->close;
    }