using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Drawing.Text;
using System.IO;
using System.Linq;
using System.Reflection;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using Eugen.ESystem;
using static Eugen.ESystem.Registry;

namespace Test_Registry
{
    public partial class Form1 : Form
    {
        #region Version und Copyright
        // Version und Copyright
        string programName = Path.GetFileNameWithoutExtension(System.Reflection.Assembly.GetExecutingAssembly().GetName().CodeBase); //Den Programmnamen auslesen
        string programVersion = System.Reflection.Assembly.GetExecutingAssembly().GetName().Version.ToString();
        static object[] attributes = System.Reflection.Assembly.GetExecutingAssembly().GetCustomAttributes(typeof(AssemblyCopyrightAttribute), false);
        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 = ((AssemblyCopyrightAttribute)attributes[0]).Copyright;
            //return startYear.Remove(0, startYear.LastIndexOf(" ") + 1);
            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 String.Concat(((AssemblyCopyrightAttribute)attributes[0]).Copyright, "-", currentYear);
                return ((AssemblyCopyrightAttribute)attributes[0]).Copyright.Replace(startYear, String.Concat(startYear, "-", currentYear));
            }
        }
        #endregion

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

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

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

        private void SetProgramInfo()
        {
            //Name, Version und Copyright setzen
            ProgramName = programName;
            ProgramVersion = programVersion;
            Copyright = copyright;
        }
        #endregion

        public Form1()
        {
            SetProgramInfo();
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            labelProgramInfo.Text = String.Concat(ProgramName, "\r\n", ProgramVersion, "\r\n", Copyright); // Zeigt die Programm-Information an

            labelDLLInfo.Text = String.Concat(Registry.DllName, "\r\n", Registry.DllVersion, "\r\n", Registry.Copyright); // Zeigt die DLL-Information an
        }

        private void buttonShowInfo_Click(object sender, EventArgs e)
        {
            //
            // Diese Zeilen gehört in das Programm kopiert
            //
            // Aufruf des Informationsfensters

            RegMainKey mainKey = RegMainKey.CurrentUser;
            string subKey = @"SOFTWARE\MySubkey";
            string regKey = "MyRegkey";
            string regValue = "MyValue";

            WriteKey(mainKey, subKey, regKey, regValue); //Werte in die Registry schreiben

            string value = ReadKey(mainKey, subKey, regKey); //Wert aus der Registry lesen

            DeleteKey(mainKey, subKey, regKey); //Subkey löschen

            labelResult.Text = "MainKey: " + mainKey + "\nSubKey:  " + subKey + "\nRegKey:  " + regKey + "\nValue:  " + regValue + "\n\nWert in die Registry schreiben\nGelesener Wert aus der Registry: \'" + value + "\'\nRegistry-Key wieder löschen";
        }

        Registry reg = new Registry();

        private void WriteKey(RegMainKey mainKey, string subKey, string regKey, string regValue)
        {
            reg.MainKey = mainKey;
            reg.SubKey = subKey;
            reg.Key = regKey;
            reg.Value = regValue;

            reg.WriteSubkey(); //Werte in die Registry schreiben
        }

        private string ReadKey(RegMainKey mainKey, string subKey, string regKey)
        {
            reg.MainKey = mainKey;
            reg.SubKey = subKey;
            reg.Key = regKey;

            return reg.ReadSubkey().ToString(); //Wert aus der Registry lesen
        }

        private void DeleteKey(RegMainKey mainKey, string subKey, string regKey)
        {
            reg.MainKey = mainKey;
            reg.SubKey = subKey;
            reg.Key = regKey;

            reg.DeleteSubkey(); //Werte in die Registry schreiben
        }
    }
}