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.Runtime.InteropServices;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace Test_ShowUsedDll
{
    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 = 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 = "";
            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 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)
        {
            string dlls = "";

            foreach (var item in ShowUsedDll())
            {
                dlls += item + Environment.NewLine + Environment.NewLine;
            }

            textBoxDllInfo.Text = dlls.Remove(dlls.LastIndexOf("\r\n\r\n"));
        }

        private List<string> ShowUsedDll()
        {
            List<string> dlls = new List<string>();
            string name = "";
            string dllInfos = "";
            string dllName = "";
            string dllVersion = "";

            foreach (ProcessModule module in Process.GetCurrentProcess().Modules)
            {
                dlls.Add(module.ModuleName + Environment.NewLine + module.FileVersionInfo.ProductVersion + Environment.NewLine + module.FileName);
            }

            DirectoryInfo ParentDirectory = new DirectoryInfo(Application.StartupPath);
            foreach (FileInfo fi in ParentDirectory.GetFiles())
            {
                if (fi.Extension.ToLower() == ".dll")
                {
                    name = fi.FullName.Remove(0, fi.FullName.LastIndexOf("\\") + 1);

                    Assembly assembly = Assembly.LoadFrom(name);

                    dllName = String.Concat(assembly.ToString().Remove(assembly.ToString().IndexOf(",")), ".dll");
                    dllVersion = assembly.ToString().Remove(0, assembly.ToString().IndexOf("Version=") + 8);
                    dllVersion = dllVersion.Remove(dllVersion.IndexOf(","));

                    dllInfos = String.Concat(dllInfos, dllName, "\r\n", dllVersion, "\r\n\r\n");

                    dlls.Add(fi.FullName.Remove(0, fi.FullName.LastIndexOf("\\") + 1) + Environment.NewLine + dllVersion + Environment.NewLine + ParentDirectory + Environment.NewLine + dllName);
                }
            }

            dlls.Sort();
            
            return dlls;
        }

        
    }
}