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.Text.RegularExpressions;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace Test_SearchAndFind
{
    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);
        }

        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);
            }
        }
        #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)
        {
            this.Text = String.Concat("Test_Search, Find and Replace     -     Version: ", ProgramVersion, "  -  ", Copyright, " by E. Höglinger");
            textBoxText.Focus();
            textBoxText.Select(0, 0);

            //textBoxSearchstring.Focus();
            //textBoxSearchstring.Text = "";
            this.ActiveControl = textBoxSearchstring;
        }

        Search search = new Search();

        private void SearchAndSelect()
        {
            try
            {
                search.StartSearch(textBoxText.Text, textBoxSearchstring.Text, checkBoxCase.Checked, checkBoxFullword.Checked);
                if (!search.Error)
                {
                    SelectSearchString(search.CurrentCursorPosition, textBoxSearchstring.Text.Length);
                }
            }
            catch (StringNotMatchException)
            {
                MessageBox.Show("Suchstring wurde nicht gefunden!");
            }
            catch (Exception)
            {
                MessageBox.Show("Unbekannter Fehler passiert!");
            }
        }

        private void SelectSearchString(int position, int length)
        {
            textBoxText.Focus();
            textBoxText.Select(position, length);
            textBoxText.Refresh();
        }

        private void NextPosition()
        {
            search.NextPosition();
            SelectSearchString(search.CurrentCursorPosition, textBoxSearchstring.Text.Length);
        }

        private void PreviousPosition()
        {
            search.PreviousPosition();
            SelectSearchString(search.CurrentCursorPosition, textBoxSearchstring.Text.Length);
        }

        private void SelectAll()
        {
            //TODO: Select All
        }

        Replace replace = new Replace();
        private void ReplaceString()
        {
            textBoxText.Text = replace.ReplaceString(textBoxText.Text, textBoxSearchstring.Text, textBoxReplacementString.Text, search.CurrentCursorPosition);
            textBoxText.Refresh();

            SearchAndSelect();
        }

        private void ReplaceAll()
        {
            List<int> newList = new List<int>();
            newList = search.AllPositions;
            newList.Reverse();

            foreach (var item in newList)
            {
                textBoxText.Text = replace.ReplaceString(textBoxText.Text, textBoxSearchstring.Text, textBoxReplacementString.Text, item);
                textBoxText.Refresh();
            }
        }

        private void textBoxSearchstring_KeyDown(object sender, KeyEventArgs e)
        {
            if (e.KeyCode == Keys.Enter)
            {
                SearchAndSelect();
            }
        }

        private void textBoxSearchstring_TextChanged(object sender, EventArgs e)
        {
            //TODO: Nichts tun
        }

        private void checkBoxCase_CheckedChanged(object sender, EventArgs e)
        {
            if (!String.IsNullOrEmpty(textBoxSearchstring.Text))
            {
                SearchAndSelect();
            }
        }

        private void checkBoxFullword_CheckedChanged(object sender, EventArgs e)
        {
            if (!String.IsNullOrEmpty(textBoxSearchstring.Text))
            {
                SearchAndSelect();
            }
        }

        private void buttonPrevious_Click(object sender, EventArgs e)
        {
            PreviousPosition();
        }

        private void buttonNext_Click(object sender, EventArgs e)
        {
            NextPosition();
        }

        private void buttonSelectAll_Click(object sender, EventArgs e)
        {
            SelectAll();
        }

        private void textBoxReplaceText_KeyDown(object sender, KeyEventArgs e)
        {
            if (e.KeyCode == Keys.Enter)
            {
                textBoxText.Focus();
            }
        }

        private void buttonReplace_Click(object sender, EventArgs e)
        {
            ReplaceString();
        }

        private void buttonReplaceAll_Click(object sender, EventArgs e)
        {
            ReplaceAll();
        }
    }
}