using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
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;

namespace Test_DeleteFileFolder
{
    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 = ((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();
        }

        string fileName = "";
        bool allFiles = false;
        bool folders = false;
        bool subFolders = false;
        bool countOnly = false;

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

        private void buttonDelete_Click(object sender, EventArgs e)
        {
            string undeletableFile = "";
            List<string> undeletableFiles = new List<string>();
            string message = "";

            //In diesem Bereich wird das Löschen ausgeführt ---------------------
            DeleteFileFolder Del = new DeleteFileFolder();
            // Hier wird das Event abonniert.
            // Das kann jede Klasse auf die gleiche Weise machen.
            Del.MyEvent += new DeleteFileFolder.EventDelegate(EventHandler);

            if (checkBoxCountOnly.Checked)
            {
                labelDeletableFiles.Text = "Number of deletable Files:          " + Del.CountFiles(textBoxFileName.Text, checkBoxSubdirectories.Checked);
                labelDeletableDirectories.Text = "Number of deletable Directories: \t" + Del.CountDirectories(textBoxFileName.Text);
            }
            else
            {
                if (radioButtonFileOnly.Checked)
                {
                    //Dateien löschen
                    if (radioButtonSingleFile.Checked)
                    {
                        undeletableFile = Del.File(textBoxFileName.Text); //Eine einzelen Datei löschen
                        progressBar.Value = 100;
                    }
                    else
                    {
                        if (!checkBoxSubdirectories.Checked)
                        {
                            undeletableFiles = Del.AllFiles(textBoxFileName.Text); //Alle Dateien eines Verzeichnisses löschen
                        }
                        else
                        {
                            undeletableFiles = Del.AllFiles(textBoxFileName.Text, true); //Alle Dateien eines Verzeichnisses und aller Unterverzeichnisse löschen
                        }
                    }
                }
                else
                {
                    undeletableFiles = Del.AllDirectories(textBoxFileName.Text);
                }
            }

            //Nicht löschbare Dateien und Verzeichnisse anzeigen
            if (undeletableFiles != null & undeletableFiles.Any())
            {
                message = "Undeleteable elements:\n";

                foreach (var element in undeletableFiles)
                {
                    message += element + "\n";
                }
                MessageBox.Show(message);
            }
        }

        private void textBoxFileName_TextChanged(object sender, EventArgs e)
        {
            ClearProgressBar();
            fileName = textBoxFileName.Text;
        }

        private void radioButtonDirectory_CheckedChanged(object sender, EventArgs e)
        {
            ClearProgressBar();
        }

        private void radioButtonFileOnly_CheckedChanged(object sender, EventArgs e)
        {
            ClearProgressBar();
        }

        private void radioButtonSingleFile_CheckedChanged(object sender, EventArgs e)
        {
            ClearProgressBar();
        }

        private void radioButtonAllFiles_CheckedChanged(object sender, EventArgs e)
        {
            ClearProgressBar();
        }

        private void checkBoxSubdirectories_CheckedChanged(object sender, EventArgs e)
        {
            ClearProgressBar();
            subFolders = !subFolders;
        }

        private void checkBoxCountOnly_CheckedChanged(object sender, EventArgs e)
        {
            ClearProgressBar();
            countOnly = !countOnly;
        }

        private void ClearProgressBar()
        {
            //Setzt die Progressbar auf 0% zurück
            progressBar.Value = 0;
            progressBar.Refresh();
        }

        #region Event Handler
        void EventHandler(long value)
        {
            //Die ProgressBar updaten
            progressBar.Value = Convert.ToInt32(value);
            progressBar.Refresh();
        }
        #endregion
    }
}