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.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using Eugen.ESystem;
using Eugen.ESystem.IO;
using Eugen.ESystem.Windows.Forms;

namespace CorrectDateInCopyright
{
    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);
                }

                if (startYear.Contains("-"))
                {
                    startYear = startYear.Remove(startYear.IndexOf("-"));
                }
                else
                {
                    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
            {
                string temp = ((AssemblyCopyrightAttribute)attributes[0]).Copyright;
                string start = temp.Remove(temp.IndexOf(startYear) - 1);
                string end = (temp.Remove(0, temp.IndexOf(" by")));

                return String.Concat(start, " ", startYear, "-", currentYear, end);
            }
        }
        #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 startToolStripMenuItem_Click(object sender, EventArgs e)
        {
            Start(); //Programmablauf starten
        }

        #region Surface
        private void hilfeToolStripMenuItem1_Click(object sender, EventArgs e)
        {
            //Hilfedatei aufrufen
            try
            {
                OpenHelpFile.Open("german"); //Hier die Sprache übergeben in der die Hilfe aufgerufen werden soll
            }
            catch (FileNotFoundException)
            {
                MessageBox.Show("Die Hilfe wurde nicht gefunden.", "Warnung", MessageBoxButtons.OK, MessageBoxIcon.Warning);
            }
            catch (CannotShowHelpFileException)
            {
                MessageBox.Show("Die Hilfe kann nicht angezeigt werden.", "Warnung", MessageBoxButtons.OK, MessageBoxIcon.Warning);
            }
            catch (Exception)
            {
                MessageBox.Show("Es ist ein unbekannter Fehler passiert!", "Fehler", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
        }

        private void überToolStripMenuItem_Click(object sender, EventArgs e)
        {
            //Programminformation aufrufen
            var about = new AboutBox(ProgramName, ProgramVersion, Copyright, true, 530, 420);
            about.ShowDialog();
        }

        private void buttonStartupDir_Click(object sender, EventArgs e)
        {
            //Startverzeichnis auswählen
            buttonShowLogfile.Enabled = false;

            ClearStatus();

            using (var sud = new FolderBrowserDialog())
            {
                DialogResult result = sud.ShowDialog();

                if (result == DialogResult.OK && !string.IsNullOrWhiteSpace(sud.SelectedPath))
                {
                    textBoxStartupfolder.Text = sud.SelectedPath;
                    StartupFolder = sud.SelectedPath;
                }
            }

            SetStartButtonDisplay();
        }

        private void textBoxStartupfolder_TextChanged(object sender, EventArgs e)
        {
            StartupFolder = textBoxStartupfolder.Text; //Startverzeichnis

            SetStartButtonDisplay();
        }

        private void textBoxStartupfolder_MouseClick(object sender, MouseEventArgs e)
        {
            ClearStatus();
        }

        private void buttonLogfileName_Click(object sender, EventArgs e)
        {
            //Logdatei auswählen
            buttonShowLogfile.Enabled = false;

            ClearStatus();

            using (SaveFileDialog sfd = new SaveFileDialog())
            {
                sfd.Filter = "log Datei (All files (*.*)|*.*|*.log)|*.log";
                sfd.FilterIndex = 2;
                sfd.RestoreDirectory = true;
                //sfd.OverwritePrompt = false;

                if (sfd.ShowDialog() == DialogResult.OK)
                {
                    LogFile = sfd.FileName;
                    textBoxLogfileName.Text = sfd.FileName;
                }
            }

            LogPath = String.Concat(System.IO.Path.GetDirectoryName(LogFile), "\\");
            FileName = System.IO.Path.GetFileName(LogFile);

            SetStartButtonDisplay();
        }

        private void textBoxLogfileName_TextChanged(object sender, EventArgs e)
        {
            LogFile = textBoxLogfileName.Text; //Logdatei
            LogPath = String.Concat(System.IO.Path.GetDirectoryName(LogFile), "\\");
            FileName = System.IO.Path.GetFileName(LogFile);

            SetStartButtonDisplay();
        }

        private void textBoxLogfileName_MouseClick(object sender, MouseEventArgs e)
        {
            ClearStatus();
        }

        private void buttonStart_Click(object sender, EventArgs e)
        {
            Start(); //Programmablauf starten
        }

        private void buttonShowLogfile_Click(object sender, EventArgs e)
        {
            ClearStatus(); //Statusbar zurücksetzen

            ShowLogfile(); //Logdatei anzeigen
        }

        private void buttonCancel_Click(object sender, EventArgs e)
        {
            this.Close();
        }
        #endregion

        private string StartupFolder { set; get; }
        private string LogFile { set; get; }
        private string LogPath { set; get; }
        private string FileName { set; get; }
        private List<string> Files { set; get; }
        private int NumberOfFiles { set; get; }

        private void Start()
        {
            //Alle 'AssemblyInfo.cs'aus dem Startverzeichnis einlesen
            toolStripProgressBar.Style = ProgressBarStyle.Marquee;
            toolStripProgressBar.MarqueeAnimationSpeed = 30;

            toolStripStatusLabel.Text = "Suche nach Vorkommen von AssemblyInfo.cs";
            statusStrip.Refresh();

            //Startknopf deaktivieren
            buttonStart.Enabled = false;

            //Alle 'AssemblyInfo.cs' suchen und bearbeiten
            backgroundWorkerSearch.WorkerSupportsCancellation = true;

            backgroundWorkerSearch.RunWorkerAsync();
        }

        private void backgroundWorkerSearch_DoWork(object sender, DoWorkEventArgs e)
        {
            Files = ReadAllFiles(StartupFolder);
            NumberOfFiles = Files.Count;

            toolStripStatusLabel.Text = String.Concat(NumberOfFiles, " Vorkommen von AssemblyInfo.cs wurden gefunden");

            //Existierende Logdatei löschen
            if (File.Exists(LogFile))
            {
                File.Delete(LogFile);
            }
            //Logdatei anlegen
            string header = "--------------------------------------------------------------------------------\n---                        Correct date in Copyright                         ---\n--------------------------------------------------------------------------------";
            var log = new LogWriter(LogPath, FileName);
            log.WriteMessage(header, LogWriter.Time.NoWrite);
            log.WriteMessage(String.Concat("Zu bearbeitende Dateien: ", NumberOfFiles.ToString()));

            for (int i = 0; i < NumberOfFiles; i++)
            {
                toolStripStatusLabel.Text = String.Concat("Vorkommen ", i + 1, " von ", NumberOfFiles, " wird bearbeitet");

                log.WriteMessage(String.Concat("Bearbeite Datei: ", Files[i]));

                //Copyright korrigieren
                CorrectDateInLine.LogFile = LogFile;
                CorrectDateInLine.Correct(Files[i]);
                

                backgroundWorkerSearch.ReportProgress((int)100 / NumberOfFiles * (i + 1)); //Fortschrittsbalken aktualisieren

                log.WriteMessage("  Datei erfolgreich bearbeitet"); //Logdatei schreiben
            }

            backgroundWorkerSearch.CancelAsync();
        }

        private void backgroundWorkerSearch_ProgressChanged(object sender, ProgressChangedEventArgs e)
        {
            //ProgressBar.Style von Laufbalken auf Prozentanzeige umschalten
            if (toolStripProgressBar.Style != ProgressBarStyle.Continuous)
            {
                toolStripProgressBar.Style = ProgressBarStyle.Continuous;
                toolStripProgressBar.Value = 0;
                statusStrip.Refresh();
            }

            toolStripProgressBar.Value = e.ProgressPercentage;
            statusStrip.Refresh();
        }

        private void backgroundWorkerSearch_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
        {
            toolStripStatusLabel.Text = String.Concat(NumberOfFiles, " Dateien wurden erfolgreich bearbeitet");

            buttonStart.Enabled = true;
            buttonShowLogfile.Enabled = true;
        }

        private List<string> ReadAllFiles(string startupfolder)
        {
            List<string> files = new List<string>();
            
            foreach (var item in Directory.GetFiles(StartupFolder, "AssemblyInfo.cs", SearchOption.AllDirectories))
            {
                files.Add(item);
            }

            return files;
        }

        private void SetStartButtonDisplay()
        {
            if (!String.IsNullOrEmpty(StartupFolder) & !String.IsNullOrEmpty(LogFile))
            {
                buttonStart.Enabled = true;
                startToolStripMenuItem.Enabled = true;
            }
            else
            {
                buttonStart.Enabled = false;
                startToolStripMenuItem.Enabled = false;
            }
        }

        private void ClearStatus()
        {
            toolStripProgressBar.Style = ProgressBarStyle.Marquee;
            toolStripProgressBar.MarqueeAnimationSpeed = 0;
            statusStrip.Refresh();

            toolStripStatusLabel.Text = "Startverzeichnis und Logdatei definieren";
        }

        private void ShowLogfile()
        {
            //Logdatei anzeigen
            if (!ShowTextFile.Show(LogFile))
            {
                MessageBox.Show("Es wurde keine Logdatei gefunden", "Fehler", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
        }
    }
}