using FSI.BT.Tools.Settings;
using FSI.Lib;
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.IO;
using System.Linq;
using System.Windows;

namespace FSI.BT.Tools.Commands
{
    /// <summary>
    /// Shows the main window.
    /// </summary>
    public class OpenAppCommand : CommandBase<OpenAppCommand>
    {
        public override void Execute(object parameter)
        {
            IEnumerable<Settings.Exe.IExe> files = new List<Settings.Exe.IExe>();
            (string ExePath, string Path, string Arguments) selectedFile = (string.Empty, string.Empty, string.Empty);

            switch ((string)parameter)
            {
                case "SimaticManager":
                    files = Global.AppSettings.Apps.SieSimaticManager;
                    break;

                case "TIAv13":
                    files = Global.AppSettings.Apps.SieTiaV13;
                    break;

                case "TIAv14":
                    files = Global.AppSettings.Apps.SieTiaV14;
                    break;

                case "TIAv15":
                    files = Global.AppSettings.Apps.SieTiaV15;
                    break;

                case "TIAv16":
                    files = Global.AppSettings.Apps.SieTiaV16;
                    break;

                case "TIAv17":
                    files = Global.AppSettings.Apps.SieTiaV17;
                    break;

                case "Starter":
                    files = Global.AppSettings.Apps.SieTiaVStarter;
                    break;

                case "Epl":
                    files = Global.AppSettings.Apps.Epl;
                    break;

                case "EplPrj":
                    selectedFile = GetApp(Global.AppSettings.Apps.Epl);
                    Lib.Guis.Prj.Mgt.FrmMain frmMainEplPrj = new Lib.Guis.Prj.Mgt.FrmMain()
                    {
                        ShowPdf = false,
                        CloseAtLostFocus = true,
                        WindowStartupLocation = WindowStartupLocation.CenterScreen,
                        Path = FSI.BT.Tools.Settings.AppSettings.GetFolderByName(Global.AppSettings.Folders, "EplPrj").path,
                        EplExe = selectedFile.ExePath,
                    };
                    frmMainEplPrj.Show();
                    return;

                case "EplPdf":
                    Lib.Guis.Prj.Mgt.FrmMain frmMainEplPdf = new Lib.Guis.Prj.Mgt.FrmMain()
                    {
                        ShowPdf = true,
                        CloseAtLostFocus = true,
                        WindowStartupLocation = WindowStartupLocation.CenterScreen,
                        Path = FSI.BT.Tools.Settings.AppSettings.GetFolderByName(Global.AppSettings.Folders, "EplPdf").path
                    };
                    frmMainEplPdf.Show();
                    return;

                case "EplPdfMgt":
                    Lib.Guis.Pdf.Mgt.FrmMain frmMainEplPdfMgt = new Lib.Guis.Pdf.Mgt.FrmMain()
                    {
                        CloseAtLostFocus = true
                    };
                    frmMainEplPdfMgt.Show();
                    return;

                case "Npp":
                    files = Global.AppSettings.Apps.Npp;
                    break;

                case "TotalCmd":
                    files = Global.AppSettings.Apps.TotalCmd;
                    break;

                case "TeXstudio":
                    files = Global.AppSettings.Apps.TeXstudio;
                    break;

                case "VS":
                    files = Global.AppSettings.Apps.Vs;
                    break;

                case "VS.Code":
                    files = Global.AppSettings.Apps.VsCode;
                    break;


                case "Rdp":
                    files = Global.AppSettings.Apps.Rdp;
                    break;

                case "DeEncrypt":
                    Lib.Guis.DeEncryptMessage.FrmMain frmMainDeEnCrypt = new Lib.Guis.DeEncryptMessage.FrmMain()
                    {
                        Password = GetType().Namespace.ToString(),
                        CloseAtLostFocus = true,
                        WindowStartupLocation = WindowStartupLocation.CenterScreen,
                    };
                    frmMainDeEnCrypt.Show();
                    return;

                case "StarterCsvExporter":
                    Lib.Guis.SieStarterCsvExporter.FrmMain frmMain = new Lib.Guis.SieStarterCsvExporter.FrmMain();
                    frmMain.Show();
                    return;

                case "Admin":
                    Gui.FrmAdmin frmAdmin = new Gui.FrmAdmin()
                    {
                        Admins = Global.Settings.Admins,
                        Users = Global.Settings.Users,
                    };
                    frmAdmin.ShowDialog();

                    if (frmAdmin.DialogResult.HasValue && frmAdmin.DialogResult.Value)
                    {
                        Global.Settings.Admins = frmAdmin.Admins;
                        Global.Settings.Users = frmAdmin.Users;
                    }
                    return;

                case "Folder":
                    Lib.Guis.Folder.Mgt.FrmMain frmFolderMgtMain = new Lib.Guis.Folder.Mgt.FrmMain()
                    {
                        CloseAtLostFocus = true,
                        Data = Global.AppSettings.Folders
                    };
                    frmFolderMgtMain.Show();
                    return;

                //case "TxtToClip":
                //    Lib.Guis.TxtToClip.Mgt.FrmMain frmTxtToClipMain = new Lib.Guis.TxtToClip.Mgt.FrmMain()
                //    {
                //        CloseAtLostFocus = false,
                //        Data = Global.AppSettings.TxtToClip
                //    };
                //    frmTxtToClipMain.Show();
                //    return;

                case "Outlook":
                    files = Global.AppSettings.Apps.Outlook;
                    break;

                case "Teams":
                    files = Global.AppSettings.Apps.Teams;
                    break;

                case "Excel":
                    files = Global.AppSettings.Apps.Excel;
                    break;

                case "Word":
                    files = Global.AppSettings.Apps.Word;
                    break;

                case "PaintNet":
                    files = Global.AppSettings.Apps.PaintNet;
                    break;

                case "Gimp":
                    files = Global.AppSettings.Apps.Gimp;
                    break;

                case "Vnc":
                    files = Global.AppSettings.Apps.Vnc;
                    break;

                case "VncAdrBook":
                    files = Global.AppSettings.Apps.VncAdrBook;
                    break;

                case "IbaAnalyzer":
                    files = Global.AppSettings.Apps.IbaAnalyzer;
                    break;
            }

            selectedFile = GetApp(files);

            if (ProgramIsRunning(selectedFile.ExePath))
            {
                ProgramToFront(selectedFile.ExePath);
                Global.Log.Info("Anwendung \"{0}\" wurde in den Vordergrund gebracht", selectedFile.ExePath);
            }
            else
            {
                Process process = new Process();
                process.StartInfo.FileName = selectedFile.ExePath;
                process.StartInfo.WorkingDirectory = selectedFile.Path;
                process.StartInfo.Arguments = selectedFile.Arguments;

                try
                {

                    process.Start();
                    Global.Log.Info("Anwendung \"{0}\" wurde gestartet", selectedFile.ExePath);
                }
                catch (System.ComponentModel.Win32Exception ex) when (ex.NativeErrorCode == 740)
                {
                    try
                    {
                        process.StartInfo.UseShellExecute = true;
                        process.StartInfo.Verb = "runas";
                        process.Start();
                        Global.Log.Info("Anwendung \"{0}\" wurde als Admin gestartet", selectedFile.ExePath);
                    }
                    catch (Exception ex2)
                    {
                        Global.Log.Info("Anwendung konnte durch folgenden Fehler \"{0}\" nicht gestartet werden.", ex2.Message);
                    }
                }
            }
        }

        public override bool CanExecute(object parameter)
        {
            IEnumerable<Settings.Exe.IExe> files = new List<Settings.Exe.IExe>();
            switch ((string)parameter)
            {
                case "SimaticManager":
                    files = Global.AppSettings.Apps.SieSimaticManager;
                    break;

                case "TIAv13":
                    files = Global.AppSettings.Apps.SieTiaV13;
                    break;

                case "TIAv14":
                    files = Global.AppSettings.Apps.SieTiaV14;
                    break;

                case "TIAv15":
                    files = Global.AppSettings.Apps.SieTiaV15;
                    break;

                case "TIAv16":
                    files = Global.AppSettings.Apps.SieTiaV16;
                    break;

                case "TIAv17":
                    files = Global.AppSettings.Apps.SieTiaV17;
                    break;

                case "Starter":
                    files = Global.AppSettings.Apps.SieTiaVStarter;
                    break;

                case "Epl":
                    files = Global.AppSettings.Apps.Epl;
                    break;

                case "EplPrj":
                    return true;

                case "EplPdf":
                    return true;

                case "EplPdfMgt":
                    return Global.AdminRights;

                case "Npp":
                    files = Global.AppSettings.Apps.Npp;
                    break;

                case "TotalCmd":
                    files = Global.AppSettings.Apps.TotalCmd;
                    break;

                case "TeXstudio":
                    files = Global.AppSettings.Apps.TeXstudio;
                    break;

                case "VS":
                    files = Global.AppSettings.Apps.Vs;
                    break;

                case "VS.Code":
                    files = Global.AppSettings.Apps.VsCode;
                    break;

                case "Rdp":
                    files = Global.AppSettings.Apps.Rdp;
                    break;

                case "DeEncrypt":
                    return Global.AdminRights;

                case "StarterCsvExporter":
                    return Global.AdminRights;

                case "Admin":
                    return Global.SuperAdminRights;

                case "Folder":
                    return Global.AppSettings.Folders != null;

                //case "TxtToClip":
                //    return Global.AppSettings.TxtToClip != null;

                case "Outlook":
                    files = Global.AppSettings.Apps.Outlook;
                    break;

                case "Teams":
                    files = Global.AppSettings.Apps.Teams;
                    break;

                case "Excel":
                    files = Global.AppSettings.Apps.Excel;
                    break;

                case "Word":
                    files = Global.AppSettings.Apps.Word;
                    break;

                case "PaintNet":
                    files = Global.AppSettings.Apps.PaintNet;
                    break;

                case "Gimp":
                    files = Global.AppSettings.Apps.Gimp;
                    break;

                case "Vnc":
                    files = Global.AppSettings.Apps.Vnc;
                    break;

                case "VncAdrBook":
                    files = Global.AppSettings.Apps.VncAdrBook;
                    break;

                case "IbaAnalyzer":
                    files = Global.AppSettings.Apps.IbaAnalyzer;
                    break;

                default: return false;

            }

            foreach (var file in files)
            {
                if (File.Exists(Environment.ExpandEnvironmentVariables(file.ExePath.Trim())))
                {
                    return true;
                }
            }

            return false;
        }

        private bool ProgramIsRunning(string FullPath)
        {
            string FilePath = Path.GetDirectoryName(FullPath);
            string FileName = Path.GetFileNameWithoutExtension(FullPath).ToLower();
            bool isRunning = false;

            Process[] pList = Process.GetProcessesByName(FileName);

            foreach (Process p in pList)
            {
                if (p.MainModule.FileName.StartsWith(FilePath, StringComparison.InvariantCultureIgnoreCase))
                {
                    isRunning = true;
                    break;
                }
            }

            return isRunning;
        }

        private (string ExePath, string Path, string Arguments) GetApp(IEnumerable<Settings.Exe.IExe> files)
        {
            (string ExePath, string Path, string Arguments) selectedFile = (string.Empty, string.Empty, string.Empty);

            for (int i = 0; i < files.ToList().Count; i++)
            {
                if (File.Exists(Environment.ExpandEnvironmentVariables(files.ToList()[i].ExePath.Trim())))
                {
                    selectedFile.ExePath = Environment.ExpandEnvironmentVariables(files.ToList()[i].ExePath.Trim());
                    selectedFile.Arguments = files.ToList()[i].Arguments;
                }
                else
                {
                    continue;
                }

                if (selectedFile.Path == String.Empty)
                {
                    selectedFile.Path = Path.GetDirectoryName(selectedFile.ExePath);
                }
                else
                {
                    selectedFile.Path = Path.GetDirectoryName(files.ToList()[i].ExePath.Trim());
                    //selectedFile.Path = Environment.ExpandEnvironmentVariables(files.ToList()[i].ExePath.Trim());
                }
            }

            return selectedFile;
        }

        [System.Runtime.InteropServices.DllImport("User32.dll")]
        private static extern bool SetForegroundWindow(IntPtr handle);
        [System.Runtime.InteropServices.DllImport("User32.dll")]
        private static extern bool ShowWindow(IntPtr handle, int nCmdShow);
        [System.Runtime.InteropServices.DllImport("User32.dll")]
        private static extern bool IsIconic(IntPtr handle);

        private void ProgramToFront(string FullPath)
        {
            string FilePath = Path.GetDirectoryName(FullPath);
            string FileName = Path.GetFileNameWithoutExtension(FullPath).ToLower();

            Process[] pList = Process.GetProcessesByName(FileName);

            foreach (Process p in pList)
            {
                if (p.MainModule.FileName.StartsWith(FilePath, StringComparison.InvariantCultureIgnoreCase))
                {
                    IntPtr handle = p.MainWindowHandle;
                    if (IsIconic(handle))
                    {
                        ShowWindow(handle, 9);
                    }
                    SetForegroundWindow(handle);
                    break;
                }
            }
        }
    }
}