public string Play()
        {
            List <PlayerInfo> players = profile.PlayerData;

            Screen[] all = Screen.AllScreens;

            string backupDir  = GameManager.Instance.GetBackupFolder(this.userGame.Game);
            string binFolder  = Path.GetDirectoryName(userGame.ExePath);
            string rootFolder = ReplaceCaseInsensitive(binFolder, gen.BinariesFolder, "");

            int gamePadId = 0;

            for (int i = 0; i < players.Count; i++)
            {
                PlayerInfo player = players[i];
                if (i > 0 && gen.KillMutex.Length > 0)
                {
                    PlayerInfo before = players[i - 1];
                    for (;;)
                    {
                        if (exited > 0)
                        {
                            return("");
                        }
                        Thread.Sleep(100);
                        if (before.screenData.KilledMutexes)
                        {
                            break;
                        }
                    }
                }

                Rectangle playerBounds = player.monitorBounds;

                // find the monitor that has this screen
                Screen owner = null;
                for (int j = 0; j < all.Length; j++)
                {
                    Screen s = all[j];
                    if (s.Bounds.Contains(playerBounds))
                    {
                        owner = s;
                        break;
                    }
                }

                int  width        = playerBounds.Width;
                int  height       = playerBounds.Height;
                bool isFullscreen = false;

                if (owner != null)
                {
                    Rectangle ob = owner.Bounds;
                    if (playerBounds.X == ob.X &&
                        playerBounds.Y == ob.Y &&
                        playerBounds.Width == ob.Width &&
                        playerBounds.Height == ob.Height)
                    {
                        isFullscreen = true;
                    }
                }

                engine.SetValue("Id", i.ToString(CultureInfo.InvariantCulture));
                engine.SetValue("Width", width.ToString(CultureInfo.InvariantCulture));
                engine.SetValue("Height", height.ToString(CultureInfo.InvariantCulture));
                engine.SetValue("IsFullscreen", isFullscreen);

                // symlink the game folder
                // find out the folder that contains the game executable
                string root = GetRootFolder(gen.BinariesFolder);

                string linkFolder = Path.Combine(backupDir, "Instance" + i);
                Directory.CreateDirectory(linkFolder);
                int exitCode;
                CmdUtil.LinkDirectories(rootFolder, linkFolder, out exitCode, root.ToLower());

                string linkBin = Path.Combine(linkFolder, gen.BinariesFolder);

                if (!string.IsNullOrEmpty(gen.BinariesFolder))
                {
                    // this needs fixing, if there are several folder to the exe and they have important files inside, this won't work! TODO
                    Directory.CreateDirectory(linkBin);
                    CmdUtil.LinkDirectories(binFolder, linkBin, out exitCode);
                }

                string exePath = Path.Combine(linkBin, this.userGame.Game.ExecutableName);

                if (gen.SymlinkExe)
                {
                    CmdUtil.LinkFiles(binFolder, linkBin, out exitCode, "xinput");
                }
                else
                {
                    CmdUtil.LinkFiles(binFolder, linkBin, out exitCode, "xinput", Path.GetFileNameWithoutExtension(gen.ExecutableName.ToLower()));
                    File.Copy(userGame.ExePath, exePath, true);
                }


                // some games have save files inside their game folder, so we need to access them inside the loop
                this.data[NucleusFolderEnum.GameFolder.ToString()] = linkFolder;

                string  saveFile = ProcessPath(gen.SavePath);
                IniFile file     = new IniFile(saveFile);

                switch (gen.SaveType)
                {
                case GenericGameSaveType.INI:
                    foreach (var modPair in gen.ModifySave)
                    {
                        string   key  = modPair.Key;
                        string[] keys = key.Split('/');

                        engine.Execute(modPair.Value);
                        string val = engine.GetCompletionValue().ToString();

                        file.IniWriteValue(keys[0], keys[1], val);
                    }
                    break;
                }

                string startArgs = gen.StartArguments;

                byte[] xdata = null;

                if (gen.SupportsKeyboard && i == (int)profile.Options["KeyboardPlayer"])
                {
                    engine.SetValue("Keyboard", true);

                    // need to make an xinput that answers to no gamepad?
                    xdata = Properties.Resources.xinput4;
                }
                else
                {
                    engine.SetValue("Keyboard", false);

                    switch (gamePadId)
                    {
                    case 0:
                        xdata = Properties.Resources.xinput1;
                        break;

                    case 1:
                        xdata = Properties.Resources.xinput2;
                        break;

                    case 2:
                        xdata = Properties.Resources.xinput3;
                        break;

                    case 3:
                        xdata = Properties.Resources.xinput4;
                        break;

                    default:
                        xdata = Properties.Resources.xinput4;
                        break;
                    }
                    gamePadId++;
                }

                using (Stream str = File.OpenWrite(Path.Combine(linkBin, "xinput1_3.dll")))
                {
                    str.Write(xdata, 0, xdata.Length);
                }

                if (!string.IsNullOrEmpty(startArgs))
                {
                    startArgs = engine.Execute(startArgs).GetCompletionValue().AsString();
                }

                if (gen.NeedsSteamEmulation)
                {
                    string steamEmu = GameManager.Instance.ExtractSteamEmu();
                    string emuExe   = Path.Combine(steamEmu, "SmartSteamLoader.exe");

                    string  emuIni = Path.Combine(steamEmu, "SmartSteamEmu.ini");
                    IniFile emu    = new IniFile(emuIni);

                    emu.IniWriteValue("Launcher", "Target", exePath);
                    emu.IniWriteValue("Launcher", "StartIn", Path.GetDirectoryName(exePath));
                    emu.IniWriteValue("Launcher", "CommandLine", startArgs);
                    emu.IniWriteValue("Launcher", "SteamClientPath", Path.Combine(steamEmu, "SmartSteamEmu.dll"));
                    emu.IniWriteValue("Launcher", "SteamClientPath64", Path.Combine(steamEmu, "SmartSteamEmu64.dll"));
                    emu.IniWriteValue("Launcher", "InjectDll", "0");
                    emu.IniWriteValue("SmartSteamEmu", "AppId", gen.SteamID);

                    Process proc;
                    if (gen.KillMutex.Length > 0)
                    {
                        // to kill the mutexes we need to orphanize the process
                        proc = ProcessUtil.RunOrphanProcess(emuExe);
                    }
                    else
                    {
                        ProcessStartInfo startInfo = new ProcessStartInfo();
                        startInfo.FileName = emuExe;
                        proc = Process.Start(startInfo);
                    }

                    player.Process  = proc;
                    player.SteamEmu = true;
                }
                else
                {
                    Process proc;
                    if (gen.KillMutex.Length > 0)
                    {
                        proc = Process.GetProcessById(StartGameUtil.StartGame(exePath, startArgs));
                    }
                    else
                    {
                        ProcessStartInfo startInfo = new ProcessStartInfo();
                        startInfo.FileName         = exePath;
                        startInfo.WindowStyle      = ProcessWindowStyle.Hidden;
                        startInfo.Arguments        = startArgs;
                        startInfo.UseShellExecute  = true;
                        startInfo.WorkingDirectory = Path.GetDirectoryName(exePath);
                        proc = Process.Start(startInfo);
                    }
                    if (proc == null)
                    {
                        for (int times = 0; times < 200; times++)
                        {
                            Thread.Sleep(50);

                            Process[] procs        = Process.GetProcesses();
                            string    proceName    = Path.GetFileNameWithoutExtension(gen.ExecutableName).ToLower();
                            string    launcherName = Path.GetFileNameWithoutExtension(gen.LauncherExe).ToLower();

                            for (int j = 0; j < procs.Length; j++)
                            {
                                Process p      = procs[j];
                                string  lowerP = p.ProcessName.ToLower();
                                if (((lowerP == proceName) || lowerP == launcherName) &&
                                    !attached.Contains(p))
                                {
                                    attached.Add(p);
                                    proc = p;
                                    break;
                                }
                            }

                            if (proc != null)
                            {
                                break;
                            }
                        }
                    }
                    else
                    {
                        attached.Add(proc);
                    }
                    player.Process = proc;
                }

                ScreenData data = new ScreenData();
                data.Position      = new Point(playerBounds.X, playerBounds.Y);
                data.Size          = new Size(playerBounds.Width, playerBounds.Height);
                data.KilledMutexes = gen.KillMutex.Length == 0;
                player.screenData  = data;
            }

            return(string.Empty);
        }
        public string Play()
        {
            ForceFinish();

            List <PlayerInfo> players = profile.PlayerData;

            for (int i = 0; i < players.Count; i++)
            {
                players[i].PlayerID = i;
            }

            UserScreen[] all = ScreensUtil.AllScreens();

            string tempDir       = GameManager.Instance.GempTempFolder(gen);
            string exeFolder     = Path.GetDirectoryName(userGame.ExePath).ToLower();
            string rootFolder    = exeFolder;
            string workingFolder = exeFolder;

            if (!string.IsNullOrEmpty(gen.BinariesFolder))
            {
                rootFolder = ReplaceCaseInsensitive(exeFolder, gen.BinariesFolder.ToLower(), "");
            }
            if (!string.IsNullOrEmpty(gen.WorkingFolder))
            {
                workingFolder = Path.Combine(exeFolder, gen.WorkingFolder.ToLower());
            }

            bool first    = true;
            bool keyboard = false;

            //if (gen.SupportsKeyboard)
            //{
            //    // make sure the keyboard player is the last to be started,
            //    // so it will get the focus by default
            //    KeyboardPlayer player = (KeyboardPlayer)profile.Options["KeyboardPlayer"];
            //    if (player.Value != -1)
            //    {
            //        keyboard = true;
            //        List<PlayerInfo> newPlayers = new List<PlayerInfo>();

            //        for (int i = 0; i < players.Count; i++)
            //        {
            //            PlayerInfo p = players[i];
            //            if (i == player.Value)
            //            {
            //                continue;
            //            }

            //            newPlayers.Add(p);
            //        }
            //        newPlayers.Add(players[player.Value]);
            //        players = newPlayers;
            //    }
            //}

            for (int i = 0; i < players.Count; i++)
            {
                PlayerInfo  player    = players[i];
                ProcessData procData  = player.ProcessData;
                bool        hasSetted = procData != null && procData.Setted;

                if (i > 0 && (gen.KillMutex?.Length > 0 || !hasSetted))
                {
                    PlayerInfo before = players[i - 1];
                    for (;;)
                    {
                        if (exited > 0)
                        {
                            return("");
                        }
                        Thread.Sleep(1000);

                        if (gen.KillMutex != null)
                        {
                            if (gen.KillMutex.Length > 0 && !before.ProcessData.KilledMutexes)
                            {
                                // check for the existence of the mutexes
                                // before invoking our StartGame app to kill them
                                ProcessData pdata = before.ProcessData;

                                if (StartGameUtil.MutexExists(pdata.Process, gen.KillMutex))
                                {
                                    // mutexes still exist, must kill
                                    StartGameUtil.KillMutex(pdata.Process, gen.KillMutex);
                                    pdata.KilledMutexes = true;
                                    break;
                                }
                                else
                                {
                                    // mutexes dont exist anymore
                                    break;
                                }
                            }
                        }
                        else
                        {
                            break;
                        }
                    }
                }

                Rectangle  playerBounds = player.MonitorBounds;
                UserScreen owner        = player.Owner;

                int  width        = playerBounds.Width;
                int  height       = playerBounds.Height;
                bool isFullscreen = owner.Type == UserScreenType.FullScreen;

                List <string> dirExclusions  = new List <string>();
                List <string> fileExclusions = new List <string>();

                // symlink the game folder (and not the bin folder, if we have one)
                string linkFolder = Path.Combine(tempDir, "Instance" + i);
                Directory.CreateDirectory(linkFolder);

                string linkBinFolder = linkFolder;
                if (!string.IsNullOrEmpty(gen.BinariesFolder))
                {
                    linkBinFolder = Path.Combine(linkFolder, gen.BinariesFolder);
                    dirExclusions.Add(gen.BinariesFolder);
                }
                string exePath = Path.Combine(linkBinFolder, this.userGame.Game.ExecutableName);

                if (!string.IsNullOrEmpty(gen.WorkingFolder))
                {
                    linkBinFolder = Path.Combine(linkFolder, gen.WorkingFolder);
                    dirExclusions.Add(gen.WorkingFolder);
                }

                // some games have save files inside their game folder, so we need to access them inside the loop
                jsData[Folder.InstancedGameFolder.ToString()] = linkFolder;

                if (gen.Hook.CustomDllEnabled)
                {
                    fileExclusions.Add("xinput1_3.dll");
                    fileExclusions.Add("ncoop.ini");
                }
                if (!gen.SymlinkExe)
                {
                    fileExclusions.Add(gen.ExecutableName.ToLower());
                }

                // additional ignored files by the generic info
                if (gen.FileSymlinkExclusions != null)
                {
                    string[] symlinkExclusions = gen.FileSymlinkExclusions;
                    for (int k = 0; k < symlinkExclusions.Length; k++)
                    {
                        string s = symlinkExclusions[k];
                        // make sure it's lower case
                        fileExclusions.Add(s.ToLower());
                    }
                }
                if (gen.DirSymlinkExclusions != null)
                {
                    string[] symlinkExclusions = gen.DirSymlinkExclusions;
                    for (int k = 0; k < symlinkExclusions.Length; k++)
                    {
                        string s = symlinkExclusions[k];
                        // make sure it's lower case
                        dirExclusions.Add(s.ToLower());
                    }
                }

                string[] fileExclusionsArr = fileExclusions.ToArray();

                int exitCode;
                CmdUtil.LinkDirectory(rootFolder, new DirectoryInfo(rootFolder), linkFolder, out exitCode, dirExclusions.ToArray(), fileExclusionsArr, true);

                if (!gen.SymlinkExe)
                {
                    File.Copy(userGame.ExePath, exePath, true);
                }

                GenericContext context = gen.CreateContext(profile, player, this);
                context.PlayerID     = player.PlayerID;
                context.IsFullscreen = isFullscreen;

                context.ExePath           = exePath;
                context.RootInstallFolder = exeFolder;
                context.RootFolder        = linkFolder;

                gen.PrePlay(context, this, player);

                string startArgs = context.StartArguments;

                if (context.Hook.CustomDllEnabled)
                {
                    byte[] xdata = Properties.Resources.xinput1_3;
                    using (Stream str = File.OpenWrite(Path.Combine(linkBinFolder, "xinput1_3.dll")))
                    {
                        str.Write(xdata, 0, xdata.Length);
                    }

                    string ncoopIni = Path.Combine(linkBinFolder, "ncoop.ini");
                    using (Stream str = File.OpenWrite(ncoopIni))
                    {
                        byte[] ini = Properties.Resources.ncoop;
                        str.Write(ini, 0, ini.Length);
                    }

                    IniFile x360 = new IniFile(ncoopIni);
                    x360.IniWriteValue("Options", "ForceFocus", gen.Hook.ForceFocus.ToString(CultureInfo.InvariantCulture));
                    x360.IniWriteValue("Options", "ForceFocusWindowName", gen.Hook.ForceFocusWindowName.ToString(CultureInfo.InvariantCulture));

                    x360.IniWriteValue("Options", "WindowX", playerBounds.X.ToString(CultureInfo.InvariantCulture));
                    x360.IniWriteValue("Options", "WindowY", playerBounds.Y.ToString(CultureInfo.InvariantCulture));

                    if (context.Hook.SetWindowSize)
                    {
                        x360.IniWriteValue("Options", "ResWidth", context.Width.ToString(CultureInfo.InvariantCulture));
                        x360.IniWriteValue("Options", "ResHeight", context.Height.ToString(CultureInfo.InvariantCulture));
                    }
                    else
                    {
                        x360.IniWriteValue("Options", "ResWidth", "0");
                        x360.IniWriteValue("Options", "ResHeight", "0");
                    }

                    x360.IniWriteValue("Options", "RerouteInput", context.Hook.XInputReroute.ToString(CultureInfo.InvariantCulture));
                    x360.IniWriteValue("Options", "RerouteJoystickTemplate", JoystickDatabase.GetID(player.GamepadProductGuid.ToString()).ToString(CultureInfo.InvariantCulture));

                    x360.IniWriteValue("Options", "EnableMKBInput", player.IsKeyboardPlayer.ToString(CultureInfo.InvariantCulture));

                    // windows events
                    x360.IniWriteValue("Options", "BlockMouseEvents", context.Hook.BlockMouseEvents.ToString(CultureInfo.InvariantCulture));
                    x360.IniWriteValue("Options", "BlockKeyboardEvents", context.Hook.BlockKeyboardEvents.ToString(CultureInfo.InvariantCulture));

                    // xinput
                    x360.IniWriteValue("Options", "XInputEnabled", context.Hook.XInputEnabled.ToString(CultureInfo.InvariantCulture));
                    x360.IniWriteValue("Options", "XInputPlayerID", player.GamepadId.ToString(CultureInfo.InvariantCulture));

                    // dinput
                    x360.IniWriteValue("Options", "DInputEnabled", context.Hook.DInputEnabled.ToString(CultureInfo.InvariantCulture));
                    x360.IniWriteValue("Options", "DInputGuid", player.GamepadGuid.ToString().ToUpper());
                    x360.IniWriteValue("Options", "DInputForceDisable", context.Hook.DInputForceDisable.ToString());
                }

                Process proc;
                if (context.NeedsSteamEmulation)
                {
                    string steamEmu = GameManager.Instance.ExtractSteamEmu(Path.Combine(linkFolder, "SmartSteamLoader"));
                    //string steamEmu = GameManager.Instance.ExtractSteamEmu();
                    if (string.IsNullOrEmpty(steamEmu))
                    {
                        return("Extraction of SmartSteamEmu failed!");
                    }

                    string  emuExe = Path.Combine(steamEmu, "SmartSteamLoader.exe");
                    string  emuIni = Path.Combine(steamEmu, "SmartSteamEmu.ini");
                    IniFile emu    = new IniFile(emuIni);

                    emu.IniWriteValue("Launcher", "Target", exePath);
                    emu.IniWriteValue("Launcher", "StartIn", Path.GetDirectoryName(exePath));
                    emu.IniWriteValue("Launcher", "CommandLine", startArgs);
                    emu.IniWriteValue("Launcher", "SteamClientPath", Path.Combine(steamEmu, "SmartSteamEmu.dll"));
                    emu.IniWriteValue("Launcher", "SteamClientPath64", Path.Combine(steamEmu, "SmartSteamEmu64.dll"));
                    emu.IniWriteValue("Launcher", "InjectDll", "1");

                    emu.IniWriteValue("SmartSteamEmu", "AppId", context.SteamID);
                    //emu.IniWriteValue("SmartSteamEmu", "SteamIdGeneration", "Static");

                    //string userName = $"Player { context.PlayerID }";

                    //emu.IniWriteValue("SmartSteamEmu", "PersonaName", userName);
                    //emu.IniWriteValue("SmartSteamEmu", "ManualSteamId", userName);

                    //emu.IniWriteValue("SmartSteamEmu", "Offline", "False");
                    //emu.IniWriteValue("SmartSteamEmu", "MasterServer", "");
                    //emu.IniWriteValue("SmartSteamEmu", "MasterServerGoldSrc", "");

                    gen.SetupSse?.Invoke();

                    if (context.KillMutex?.Length > 0)
                    {
                        // to kill the mutexes we need to orphanize the process
                        proc = ProcessUtil.RunOrphanProcess(emuExe);
                    }
                    else
                    {
                        ProcessStartInfo startInfo = new ProcessStartInfo();
                        startInfo.FileName = emuExe;
                        proc = Process.Start(startInfo);
                    }

                    player.SteamEmu = true;
                }
                else
                {
                    if (context.KillMutex?.Length > 0)
                    {
                        proc = Process.GetProcessById(StartGameUtil.StartGame(exePath, startArgs));
                    }
                    else
                    {
                        ProcessStartInfo startInfo = new ProcessStartInfo();
                        startInfo.FileName         = exePath;
                        startInfo.WindowStyle      = ProcessWindowStyle.Hidden;
                        startInfo.Arguments        = startArgs;
                        startInfo.UseShellExecute  = true;
                        startInfo.WorkingDirectory = Path.GetDirectoryName(exePath);
                        proc = Process.Start(startInfo);
                    }

                    if (proc == null)
                    {
                        for (int times = 0; times < 200; times++)
                        {
                            Thread.Sleep(50);

                            Process[] procs        = Process.GetProcesses();
                            string    proceName    = Path.GetFileNameWithoutExtension(context.ExecutableName).ToLower();
                            string    launcherName = Path.GetFileNameWithoutExtension(context.LauncherExe).ToLower();

                            for (int j = 0; j < procs.Length; j++)
                            {
                                Process p      = procs[j];
                                string  lowerP = p.ProcessName.ToLower();
                                if (((lowerP == proceName) || lowerP == launcherName) &&
                                    !attached.Contains(p))
                                {
                                    attached.Add(p);
                                    proc = p;
                                    break;
                                }
                            }

                            if (proc != null)
                            {
                                break;
                            }
                        }
                    }
                    else
                    {
                        attached.Add(proc);
                    }
                }

                ProcessData data = new ProcessData(proc);

                data.Position      = new Point(playerBounds.X, playerBounds.Y);
                data.Size          = new Size(playerBounds.Width, playerBounds.Height);
                data.KilledMutexes = context.KillMutex?.Length == 0;
                player.ProcessData = data;

                first = false;

                Thread.Sleep(TimeSpan.FromSeconds(gen.PauseBetweenStarts));
            }

            return(string.Empty);
        }