using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Diagnostics;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Reflection;
using System.Resources;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace Eugen.ESystem
{
    public class StartStopExtProgram
    {
        #region Version und Copyright
        // Version und Copyright
        static string dllName = Path.GetFileNameWithoutExtension(System.Reflection.Assembly.GetExecutingAssembly().GetName().CodeBase); //Den Programmnamen auslesen
        static string dllVersion = System.Reflection.Assembly.GetExecutingAssembly().GetName().Version.ToString();
        static object[] attributes = Assembly.GetExecutingAssembly().GetCustomAttributes(typeof(AssemblyCopyrightAttribute), false);
        static string copyright = GenerateCopyright();
        string icon = Application.StartupPath + "\\Info.bmp";
        //Assembly Datum und Zeit
        static DateTime value = AssemblyDateTime();
        string date = value.ToShortDateString();
        string time = value.ToLongTimeString();
        private static DateTime AssemblyDateTime()
        {
            var version = System.Reflection.Assembly.GetExecutingAssembly().GetName().Version;
            var buildDateTime = new DateTime(2000, 1, 1).Add(new TimeSpan(TimeSpan.TicksPerDay * version.Build + TimeSpan.TicksPerSecond * 2 * version.Revision));
            //Tage seit dem 1. Januar 2000 und Sekunden seit Mitternacht, (multiplizier mit 2 ergibt das Original)
            return buildDateTime;
        }

        private static string CurrentYear()
        {
            DateTime dtn = DateTime.Now;
            return dtn.Year.ToString();
        }

        private static string StartYear()
        {
            string startYear = "";
            if (((AssemblyCopyrightAttribute)attributes[0]).Copyright.Contains("Copyright © "))
            {
                startYear = ((AssemblyCopyrightAttribute)attributes[0]).Copyright.Replace("Copyright © ", "");
                while (startYear.StartsWith(" "))
                {
                    startYear = startYear.Remove(0, 1);
                }
                startYear = startYear.Remove(startYear.IndexOf(" "));
                return startYear;
            }
            else
            {
                DateTime dtn = DateTime.Now;
                return dtn.Year.ToString();
            }
        }

        private static string GenerateCopyright()
        {
            string startYear = StartYear();
            string currentYear = CurrentYear();

            if (startYear == currentYear)
            {
                return ((AssemblyCopyrightAttribute)attributes[0]).Copyright;
            }
            else
            {
                return ((AssemblyCopyrightAttribute)attributes[0]).Copyright.Replace(startYear, String.Concat(startYear, "-", currentYear));
            }
        }
        #endregion

        #region DLL-Info
        /// <summary>
        /// Contains the name of the program file
        /// </summary>
        public static string DllName { set; get; }

        /// <summary>
        /// Contains the version of the program file
        /// </summary>
        public static string DllVersion { set; get; }

        /// <summary>
        /// Contains the copyright notice
        /// </summary>
        public static string Copyright { set; get; }

        private static void SetDllInfo()
        {
            //Name, Version und Copyright setzen
            DllName = dllName;
            DllVersion = dllVersion;
            Copyright = copyright;
        }
        #endregion

        /// <summary>
        /// Starts or stops an external program.
        /// </summary>
        /// <param name="program">A valid program name with path and extension.</param>
        static StartStopExtProgram()
        {
            SetDllInfo(); //Name, Version und Copyright der DLL setzen
        }

        /// <summary>
        /// Starts or stops an external program.
        /// </summary>
        /// <param name="program">A valid program name with path and extension.</param>
        public StartStopExtProgram(string program)
        {
            SetDllInfo(); //Name, Version und Copyright der DLL setzen

            SetBaseValues(program);
            StartStop(String.Concat(ProgramPath, "\\", Program), Arg, WinStyleMinimized, ProcessName);
        }

        /// <summary>
        /// Starts or stops an external program in declared window style.
        /// </summary>
        /// <param name="program">A valid program name with path and extension.</param>
        /// <param name="winStyleMinimized">Window style: false=visible, true=minimized.</param>
        public StartStopExtProgram(string program, bool winStyleMinimized)
        {
            SetDllInfo(); //Name, Version und Copyright der DLL setzen

            SetBaseValues(program, winStyleMinimized);
            StartStop(String.Concat(ProgramPath, "\\", Program), Arg, WinStyleMinimized, ProcessName);
        }

        /// <summary>
        /// Starts or stops an external program in declared window style and transfer parameter.
        /// </summary>
        /// <param name="program">A valid program name with path and extension.</param>
        /// <param name="arg">A valid transfer parameter.</param>
        /// <param name="winStyleMinimized">Window style: false=visible, true=minimized.</param>
        public StartStopExtProgram(string program, string arg, bool winStyleMinimized)
        {
            SetDllInfo(); //Name, Version und Copyright der DLL setzen

            SetBaseValues(program, arg, winStyleMinimized);
            StartStop(String.Concat(ProgramPath, "\\", Program), Arg, WinStyleMinimized, ProcessName);
        }

        /// <summary>
        /// Starts or stops an external program in declared window style and transfer parameter.
        /// </summary>
        /// <param name="programPath">A valid program path.</param>
        /// <param name="programName">A valid program name with extension.</param>
        /// <param name="arg">A valid transfer parameter.</param>
        /// <param name="winStyleMinimized">Window style: false=visible, true=minimized.</param>
        public StartStopExtProgram(string programPath, string programName, string arg, bool winStyleMinimized)
        {
            SetDllInfo(); //Name, Version und Copyright der DLL setzen

            SetBaseValues(programPath, programName, arg, winStyleMinimized);
            StartStop(String.Concat(ProgramPath, "\\", Program), Arg, WinStyleMinimized, ProcessName);
        }

        protected string ProgramPath { set; get; }
        protected string Program { set; get; }
        protected string Arg { set; get; }
        protected bool WinStyleMinimized { set; get; }
        protected string ProcessName { set; get; }

        private void SetBaseValues(string program)
        {
            if (File.Exists(program))
            {
                Program = Path.GetFileName(program);
                ProgramPath = Path.GetDirectoryName(program);
            }
            else
            {
                throw new NoValidProgramNameException(Language.message001);
            }

            Arg = "";
            WinStyleMinimized = false;

            ProcessName = SetProcessName(program);
        }

        private void SetBaseValues(string program, bool winStyleMinimized)
        {
            if (File.Exists(program))
            {
                Program = Path.GetFileName(program);
                ProgramPath = Path.GetDirectoryName(program);
            }
            else
            {
                throw new NoValidProgramNameException(Language.message001);
            }

            Arg = "";
            WinStyleMinimized = winStyleMinimized;

            ProcessName = SetProcessName(program);
        }

        private void SetBaseValues(string program, string arg, bool winStyleMinimized)
        {
            if (File.Exists(program))
            {
                Program = Path.GetFileName(program);
                ProgramPath = Path.GetDirectoryName(program);
            }
            else
            {
                throw new NoValidProgramNameException(Language.message001);
            }

            Arg = arg;
            WinStyleMinimized = winStyleMinimized;

            ProcessName = SetProcessName(program);
        }

        private void SetBaseValues(string programPath, string programName, string arg, bool winStyleMinimized)
        {
            if (Directory.Exists(programPath))
            {
                ProgramPath = programPath;
            }
            else
            {
                throw new NoValidFolderStructureException(Language.message003);
            }

            if (File.Exists(String.Concat(programPath, "\\", programName)))
            {
                Program = programName;
            }
            else
            {
                throw new NoValidProgramNameException(Language.message002);
            }

            Arg = arg;
            WinStyleMinimized = winStyleMinimized;

            ProcessName = SetProcessName(programName);
        }

        private string SetProcessName(string program)
        {
            if (!String.IsNullOrEmpty(program))
            {
                System.Text.StringBuilder sb = new System.Text.StringBuilder();
                sb.Append(program.Substring(0, 1).ToUpper() + program.Substring(1));
                return Path.GetFileNameWithoutExtension(sb.ToString());
            }
            else
            {
                throw new UnableToGenerateProcessNameException(Language.message002);
            }
        }

        private void StartStop(string program, string arg, bool winStyle, string processName)
        {
            if (!CheckProcessIsRun(processName))
            {
                Start(program, arg, winStyle);
            }
            else
            {
                Stop(program);
            }
        }

        private static bool CheckProcessIsRun(string processName)
        {
            //Prüfen ob der Prozess läuft
            return (Process.GetProcessesByName(processName).Length > 0);
        }

        public bool CheckProcessIsRun()
        {
            //Prüfen ob der Prozess läuft
            return (Process.GetProcessesByName(ProcessName).Length > 0);
        }

        private void Start(string program, string arg, bool winStyle)
        {
            try
            {
                ProcessStartInfo startProgram = new ProcessStartInfo(program);
                startProgram.Arguments = arg;
                if (winStyle)
                {
                    startProgram.WindowStyle = ProcessWindowStyle.Minimized;
                }
                Process.Start(startProgram);
            }
            catch (Exception)
            {
                throw new UnableToRunProgramException(Language.message005);
            }
        }

        private void Stop(string program)
        {
            try
            {
                string process = program.Remove(0, program.LastIndexOf(@"\") + 1);
                process = process.Remove(process.Length - 4);

                Process[] close = Process.GetProcessesByName(process);
                close[0].CloseMainWindow();
                close[0].Kill();

                while (CheckProcessIsRun(process))
                {
                    //Warten bis der Prozess beendet ist
                }
            }
            catch (Exception ex)
            {
                throw new UnableToStopProgramException("Programm konnte nicht beendet werden!\n\n" + ex);
            }
        }
    }

    #region Exceptions
    class NoValidFolderStructureException : ApplicationException
    {
        public NoValidFolderStructureException()
        {
        }

        public NoValidFolderStructureException(string message)
            : base(message)
        {
        }

        public NoValidFolderStructureException(string message, Exception inner)
            : base(message, inner)
        {
        }
    }

    class NoValidProgramNameException : ApplicationException
    {
        public NoValidProgramNameException()
        {
        }

        public NoValidProgramNameException(string message)
            : base(message)
        {
        }

        public NoValidProgramNameException(string message, Exception inner)
            : base(message, inner)
        {
        }
    }

    class UnknownErrorException : ApplicationException
    {
        public UnknownErrorException()
        {
        }

        public UnknownErrorException(string message)
            : base(message)
        {
        }

        public UnknownErrorException(string message, Exception inner)
            : base(message, inner)
        {
        }
    }

    class UnableToRunProgramException : ApplicationException
    {
        public UnableToRunProgramException()
        {
        }

        public UnableToRunProgramException(string message)
            : base(message)
        {
        }

        public UnableToRunProgramException(string message, Exception inner)
            : base(message, inner)
        {
        }
    }

    class UnableToStopProgramException : ApplicationException
    {
        public UnableToStopProgramException()
        {
        }

        public UnableToStopProgramException(string message)
            : base(message)
        {
        }

        public UnableToStopProgramException(string message, Exception inner)
            : base(message, inner)
        {
        }
    }

    class UnableToGenerateProcessNameException : ApplicationException
    {
        public UnableToGenerateProcessNameException()
        {
        }

        public UnableToGenerateProcessNameException(string message)
            : base(message)
        {
        }

        public UnableToGenerateProcessNameException(string message, Exception inner)
            : base(message, inner)
        {
        }
    }
    #endregion
}