using System;
using System.IO;
using System.Reflection;
using System.Windows.Forms;

namespace CheckEnvironment
{
    public partial class CheckEnvironment : 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 = ((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 CheckEnvironment()
        {
            InitializeComponent();
            SetProgramInfo();
        }

        private void buttonClose_Click(object sender, EventArgs e)
        {
            this.Close();
        }

        private string CheckEnv(string env)
        {
             return Environment.GetEnvironmentVariable(env);
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            string result = "";

            result = CheckEnv("NX_ONLINE");
            if (String.IsNullOrEmpty(result))
            {
                textBoxNxOnline.Text = "";
                labelNxOnlineResult.Text = "MISSING";
            }
            else
            {
                textBoxNxOnline.Text = result;
                labelNxOnlineResult.Text = "OK";
            }

            result = CheckEnv("NX_OFFLINE");
            if (String.IsNullOrEmpty(result))
            {
                textBoxNxOffline.Text = "";
                labelNxOfflineResult.Text = "MISSING";
            }
            else
            {
                textBoxNxOffline.Text = result;
                labelNxOfflineResult.Text = "OK";
            }

            result = CheckEnv("UGII_ENV_FILE");
            if (String.IsNullOrEmpty(result))
            {
                textBoxUgiiEnvFile.Text = "";
                labelUgiiEnvFileResult.Text = "MISSING";
            }
            else
            {
                textBoxUgiiEnvFile.Text = result;
                labelUgiiEnvFileResult.Text = "OK";
            }

            result = CheckEnv("COMPSOLV_MACHINE");
            if (String.IsNullOrEmpty(result))
            {
                textBoxCompsolveMachine.Text = "";
                labelCompsolveMachineResult.Text = "MISSING";
            }
            else
            {
                textBoxCompsolveMachine.Text = result;
                labelCompsolveMachineResult.Text = "OK";
            }

            result = CheckEnv("COMPSOLV_TOOLS");
            if (String.IsNullOrEmpty(result))
            {
                textBoxCompsolvTools.Text = "";
                labelCompsolvToolsResult.Text = "MISSING";
            }
            else
            {
                textBoxCompsolvTools.Text = result;
                labelCompsolvToolsResult.Text = "OK";
            }

            result = CheckEnv("COMPSOLVE_STDLIB");
            if (String.IsNullOrEmpty(result))
            {
                textBoxCompsolvStdLib.Text = "";
                labelCompsolvStdLibResult.Text = "MISSING";
            }
            else
            {
                textBoxCompsolvStdLib.Text = result;
                labelCompsolvStdLibResult.Text = "OK";
            }

            result = CheckEnv("COMPSOLV_UGII_SETTINGS");
            if (String.IsNullOrEmpty(result))
            {
                textBoxCompsolvUgiiSettings.Text = "";
                labelCompsolvUgiiSettingsResult.Text = "MISSING";
            }
            else
            {
                textBoxCompsolvUgiiSettings.Text = result;
                labelCompsolvUgiiSettingsResult.Text = "OK";
            }
        }
    }
}