using System;
using System.ComponentModel;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Net.NetworkInformation;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace EncryptPad
{
    public partial class MainWindow : Form
    {
        [DllImport("user32.dll")]
        static extern int SendMessage(IntPtr hWnd, uint wMsg, UIntPtr wParam, IntPtr lParam);
        public static string filename = "Unnamed.enp";
        public static string key = "";
        public static int textSave = 0;
        public static string[] args = Environment.GetCommandLineArgs();
        Properties.Settings ps = Properties.Settings.Default;

        public MainWindow() 
        {
            InitializeComponent();
        }

        void SaltMAC()
        {
            var networkInterfaces = NetworkInterface.GetAllNetworkInterfaces();
            foreach (var networkInterface in networkInterfaces)
            {
                if (networkInterface.NetworkInterfaceType == NetworkInterfaceType.Ethernet)
                {
                    var address = networkInterface.GetPhysicalAddress().ToString();

                    if (ps.FirstLaunch == false)
                    {
                        DialogResult res = new DialogResult();
                        MessageBoxCenter.PrepToCenterMessageBoxOnForm(this);
                        res = MessageBox.Show("Get The Salt from mac address? (You can edit it by himself in Settings)", "The Salt",
                        MessageBoxButtons.YesNo, MessageBoxIcon.Question);

                        if (res == DialogResult.Yes)
                        {
                            ps.TheSalt = address;
                            ps.FirstLaunch = true;
                            ps.Save();
                        }

                    }
                }
            }
        }

        private void открытьToolStripMenuItem_Click(object sender, EventArgs e)
        {          
            int Cikil = 0;
            try
            {
                if (OpenFile.ShowDialog() != DialogResult.OK) return;
                {
                    string NameWithotPath = Path.GetFileName(OpenFile.FileName);
                    string opnfile = File.ReadAllText(OpenFile.FileName);
                    Form2 f2 = new Form2();
                    f2.ShowDialog();
                    if (Form2.formClosing == true)
                    {
                        return;
                    }

                    string de = AES.Decrypt(opnfile, key, ps.TheSalt, ps.HashAlgorithm, ps.PasswordIterations, "16CHARSLONG12345", ps.KeySize);

                    customRTB.Text = de;
                    toolStripStatusLabel1.Text = NameWithotPath;
                    toolStripStatusLabel1.ToolTipText = (OpenFile.FileName);

                }
            }
            catch
            {
                string NameWithotPath = Path.GetFileName(OpenFile.FileName);
                string opnfile = File.ReadAllText(OpenFile.FileName, Encoding.Default);
                toolStripStatusLabel1.Text = NameWithotPath;
                toolStripStatusLabel1.ToolTipText = (OpenFile.FileName);

                do
                {
                    Cikil = 0;

                    MessageBoxCenter.PrepToCenterMessageBoxOnForm(this);
                    DialogResult dialogResult = MessageBox.Show("Wrong key!", "", MessageBoxButtons.RetryCancel, MessageBoxIcon.Error);
                    if (dialogResult == DialogResult.Retry)
                    {
                        Form2 Form2 = new Form2();
                        Form2.ShowDialog();
                        try
                        {
                            string de = AES.Decrypt(opnfile, key, ps.TheSalt, ps.HashAlgorithm, ps.PasswordIterations, "16CHARSLONG12345", ps.KeySize);

                            customRTB.Text = de;
                            toolStripStatusLabel1.Text = NameWithotPath;
                            toolStripStatusLabel1.ToolTipText = (OpenFile.FileName);
                        }
                        catch
                        {
                            Cikil = 1;
                        }
                    }

                    if (dialogResult == DialogResult.Cancel)
                    {
                        toolStripStatusLabel1.Text = "Ready";
                    }

                } while (Cikil == 1);

                filename = OpenFile.FileName;
                textSave = 0;
                customRTB.Select(0, 0);

                return;

            }

            filename = OpenFile.FileName;
            textSave = 0;
            customRTB.Select(0, 0);
        }

        private void openAsotiations()
        {
            Form2 Form2 = new Form2();
            Form2.StartPosition = FormStartPosition.CenterScreen;

            try
            {
                string NameWithotPath = Path.GetFileName(args[1]);
                string opnfile = File.ReadAllText(args[1]);
                Form2.ShowDialog();
                if (Form2.formClosing == true)
                {
                    return;
                }
                string de = AES.Decrypt(opnfile, key, ps.TheSalt, ps.HashAlgorithm, ps.PasswordIterations, "16CHARSLONG12345", ps.KeySize);

                customRTB.Text = de;
                toolStripStatusLabel1.Text = NameWithotPath;
                toolStripStatusLabel1.ToolTipText = (args[1]);
            }

            catch
            {
                string NameWithotPath = Path.GetFileName(args[1]);
                string opnfile = File.ReadAllText(args[1]);
                toolStripStatusLabel1.Text = NameWithotPath;
                toolStripStatusLabel1.ToolTipText = (args[1]);
            ComeHere:
                DialogResult dialogResult = MessageBox.Show("Wrong key!", "", MessageBoxButtons.RetryCancel, MessageBoxIcon.Error);
                if (dialogResult == DialogResult.Retry)
                {
                    Form2.ShowDialog();
                    try
                    {
                        string de = AES.Decrypt(opnfile, key, ps.TheSalt, ps.HashAlgorithm, ps.PasswordIterations, "16CHARSLONG12345", ps.KeySize);

                        customRTB.Text = de;
                        toolStripStatusLabel1.Text = NameWithotPath;
                        toolStripStatusLabel1.ToolTipText = (args[1]);
                    }
                    catch
                    {
                        goto ComeHere;
                    }
                }

                if (dialogResult == DialogResult.Cancel)
                {
                    Application.Exit();
                }

            }

            filename = args[1];
            textSave = 0;
            customRTB.Select(0, 0);
        }


        private void новыйToolStripMenuItem_Click_1(object sender, EventArgs e)
        {
            customRTB.Clear();
            Form2 Form2 = new Form2();
            Form2.ShowDialog();
            if (SaveFile.ShowDialog() != DialogResult.OK) return;
            StreamWriter sw = new StreamWriter(SaveFile.FileName);
            string NameWithotPath = Path.GetFileName(SaveFile.FileName);
            toolStripStatusLabel1.Text =  NameWithotPath;
            toolStripStatusLabel1.ToolTipText = (SaveFile.FileName);
            filename = SaveFile.FileName;
            sw.Close();
        }

        private async void сохранитьToolStripMenuItem_Click(object sender, EventArgs e)
        {
            string NameWithotPath = Path.GetFileName(OpenFile.FileName);

            if (string.IsNullOrEmpty(key))
            {
                Form2 Form2 = new Form2();
                Form2.ShowDialog();
            }

            if (SaveFile.ShowDialog() != DialogResult.OK) return;
            filename = SaveFile.FileName;

            string noenc = customRTB.Text;
            string en = AES.Encrypt(customRTB.Text, key, ps.TheSalt, ps.HashAlgorithm, ps.PasswordIterations, "16CHARSLONG12345", ps.KeySize);
            customRTB.Text = en;
            StreamWriter sw = new StreamWriter(filename);
            int i = customRTB.Lines.Count();
            int j = 0;
            i = i - 1;
            while (j <= i)
            {
                sw.WriteLine(customRTB.Lines.GetValue(j).ToString());
                j = j + 1;
            }
            sw.Close();
            customRTB.Text = noenc;
            toolStripStatusLabel1.Text = "Saved in: " + filename;
            textSave = 0;
            await Task.Delay(4000);
            toolStripStatusLabel1.Text = "Ready";

        }

        private void MainWindow_FormClosing(object sender, FormClosingEventArgs e)
        {
            ps.TopPosition = this.Top;
            ps.LeftPosition = this.Left;
            ps.FormWidth = this.Width;
            ps.FormHeight = this.Height;
            ps.MenuWrap = переносПоСловамToolStripMenuItem.Checked;
            ps.RichWrap = customRTB.WordWrap;
            ps.Save();

            if (textSave == 1)
            {
                string f = "Unnamed.enp";
                if (customRTB.Text != "")
                {
                    DialogResult res = new DialogResult();
                    MessageBoxCenter.PrepToCenterMessageBoxOnForm(this);
                    res = MessageBox.Show("Save changes in:\n" + filename + " ?",
                                                     "",
                                                     MessageBoxButtons.YesNoCancel,
                                                     MessageBoxIcon.Question);
                    if (res == DialogResult.Yes)
                    {
                        if (filename == f)
                        {
                            SaveFile.FileName = f;
                            сохранитьToolStripMenuItem_Click(this, new EventArgs());
                        }

                        if (filename != f)
                        {
                            сохранитьToolStripMenuItem1_Click_1(this, new EventArgs());
                        }
                        Environment.Exit(0);
                    }

                    try
                    {        
                    if (res == DialogResult.No)
                    {

                        Environment.Exit(0);
                    }

                    if (res == DialogResult.Cancel)
                    {

                        e.Cancel = true;
                    }

                    }
                    catch (Exception)
                    {

                    }

                }
            }
        }

        void LineAndColumn()
        {
            int line = customRTB.GetLineFromCharIndex(customRTB.SelectionStart);
            int column = customRTB.SelectionStart - customRTB.GetFirstCharIndexFromLine(line);
            line += 1;
            column += 1;

            lineStripStatusLabel.Text = "Line: " + line.ToString();
            columnStripStatusLabel.Text = "Column: " + column.ToString();
        }

        private void MainWindow_Load(object sender, EventArgs e)
        {
            this.Top = ps.TopPosition;
            this.Left = ps.LeftPosition;
            this.Width = ps.FormWidth;
            this.Height = ps.FormHeight;
            customRTB.Font = new Font(ps.RichTextFont, ps.RichTextSize);
            customRTB.ForeColor = ps.RichForeColor;
            customRTB.BackColor = ps.RichBackColor;
            переносПоСловамToolStripMenuItem.Checked = ps.MenuWrap;
            customRTB.WordWrap = ps.RichWrap;

            customRTB.SelectionIndent += 6;
            customRTB.SelectionRightIndent += 7;

            LineAndColumn();
            
            if (args.Length > 1)
            {
              openAsotiations();
            }

            SaltMAC();
        }

        private void очиститьToolStripMenuItem_Click(object sender, EventArgs e)
        {
            customRTB.Clear();
        }

        private async void сохранитьToolStripMenuItem1_Click_1(object sender, EventArgs e)
        {
            string f = "Unnamed.enp";
            string NameWithotPath = Path.GetFileName(OpenFile.FileName);

            if (filename == f)
            {
                SaveFile.FileName = f;
                сохранитьToolStripMenuItem_Click(this, new EventArgs());
            }

            string noenc = customRTB.Text;
            string en = AES.Encrypt(customRTB.Text, key, ps.TheSalt, ps.HashAlgorithm, ps.PasswordIterations, "16CHARSLONG12345", ps.KeySize);
            customRTB.Text = en;
            StreamWriter sw = new StreamWriter(filename);
            int i = customRTB.Lines.Count();
            int j = 0;
            i = i - 1;

            while (j <= i)
            {
                sw.WriteLine(customRTB.Lines.GetValue(j).ToString());
                j = j + 1;
            }

            sw.Close();
            customRTB.Text = noenc;
            toolStripStatusLabel1.Text = "Saved in: " + filename;
            await Task.Delay(4000);
            toolStripStatusLabel1.Text = "Ready";
            textSave = 0;
        }

        private void выходToolStripMenuItem_Click(object sender, EventArgs e)
        {
            Application.Exit();
        }

        private void выделитьВсеToolStripMenuItem_Click(object sender, EventArgs e)
        {
            if (customRTB.Focused == true)
            customRTB.SelectAll();
            else searchTextBox.SelectAll();
        }

        private void вырезатьToolStripMenuItem_Click(object sender, EventArgs e)
        {
            if (customRTB.Focused == true)
                customRTB.Cut();
            else
                searchTextBox.Cut();         
        }

        private void копироватьToolStripMenuItem_Click(object sender, EventArgs e)
        {
            if (customRTB.Focused == true)
                customRTB.Copy();
            else
                searchTextBox.Copy();
        }

        private void вставитьToolStripMenuItem_Click(object sender, EventArgs e)
        {
            if (customRTB.Focused == true)
                customRTB.Paste(DataFormats.GetFormat(DataFormats.Text));
            else
                searchTextBox.Paste();
        }

        private void правкаToolStripMenuItem_MouseDown(object sender, MouseEventArgs e)
        {
            if (customRTB.SelectionLength != 0)
            {
                вырезатьToolStripMenuItem.Enabled = true;
                копироватьToolStripMenuItem.Enabled = true;
                удалитьToolStripMenuItem.Enabled = true;
            }
            if (customRTB.SelectionLength == 0)
            {
                вырезатьToolStripMenuItem.Enabled = false;
                копироватьToolStripMenuItem.Enabled = false;
                удалитьToolStripMenuItem.Enabled = false;
            }         
        }

        private void УдалитьФайлToolStripMenuItem_Click_1(object sender, EventArgs e)
        {
            if (filename != "Unnamed.enp")
            {
                MessageBoxCenter.PrepToCenterMessageBoxOnForm(this);
                if (MessageBox.Show("Delete file: " + filename + " ?", "", MessageBoxButtons.YesNo, MessageBoxIcon.Question) == DialogResult.Yes)
                {
                    File.Delete(filename);
                    toolStripStatusLabel1.Text =  filename + " deleted";
                    customRTB.Clear();
                }
            }
            if (filename == "Unnamed.enp")
            {
                MessageBoxCenter.PrepToCenterMessageBoxOnForm(this);
                MessageBox.Show("No open files", "", MessageBoxButtons.OK, MessageBoxIcon.Question);
            }
        }

        private void открытьРасположениеФайлаToolStripMenuItem_Click(object sender, EventArgs e)
        {
            if (filename != "Unnamed.enp")
            {
                System.Diagnostics.Process.Start("explorer.exe", @"/select, " + filename);
            }
            if (filename == "Unnamed.enp")
            {
                MessageBoxCenter.PrepToCenterMessageBoxOnForm(this);
                MessageBox.Show("No open files", "", MessageBoxButtons.OK, MessageBoxIcon.Question);
            }

        }

        private void переносПоСловамToolStripMenuItem_Click(object sender, EventArgs e)
        {
            if (переносПоСловамToolStripMenuItem.Checked == true)
            {
                customRTB.WordWrap = true;
            }
            if (переносПоСловамToolStripMenuItem.Checked == false)
            {
                customRTB.WordWrap = false;
            }
        }

        private void отменитьToolStripMenuItem_Click(object sender, EventArgs e)
        {
            отменаToolStripMenuItem_Click(this, new EventArgs());
        }

        public void отменаToolStripMenuItem_Click(object sender, EventArgs e)
        {
            if (customRTB.CanUndo == true)
            {
                customRTB.Undo();
            }
            else customRTB.Redo();
        }

        private void вырезатьToolStripMenuItem1_Click(object sender, EventArgs e)
        {
            customRTB.Cut();
        }

        private void копироватьToolStripMenuItem1_Click(object sender, EventArgs e)
        {
            customRTB.Copy();
        }

        private void вставитьToolStripMenuItem1_Click(object sender, EventArgs e)
        {
            customRTB.Paste(DataFormats.GetFormat(DataFormats.Text));
        }

        private void contextMenuStrip1_Opening(object sender, CancelEventArgs e)
        {
            if (customRTB.SelectionLength != 0)
            {
                вырезатьToolStripMenuItem1.Enabled = true;
                копироватьToolStripMenuItem1.Enabled = true;
                удалитьToolStripMenuItem1.Enabled = true;
            }
            if (customRTB.SelectionLength == 0)
            {
                вырезатьToolStripMenuItem1.Enabled = false;
                копироватьToolStripMenuItem1.Enabled = false;
                удалитьToolStripMenuItem1.Enabled = false;
            }
        }

        private void удалитьToolStripMenuItem_Click(object sender, EventArgs e)
        {
            customRTB.SelectedText = "";
        }

        private void удалитьToolStripMenuItem1_Click(object sender, EventArgs e)
        {
            customRTB.SelectedText = "";
        }

        private void порядокЧтенияСправаНалевоToolStripMenuItem_Click(object sender, EventArgs e)
        {
            if (порядокЧтенияСправаНалевоToolStripMenuItem.Checked == true)
            {
                customRTB.RightToLeft = RightToLeft.Yes;
            }
            if (порядокЧтенияСправаНалевоToolStripMenuItem.Checked == false)
            {
                customRTB.RightToLeft = RightToLeft.No;
            }           
        }

        private void очиститьToolStripMenuItem1_Click(object sender, EventArgs e)
        {
            customRTB.Clear();
        }

        private void оПрограммеToolStripMenuItem_Click(object sender, EventArgs e)
        {
            AboutFrom a = new AboutFrom();
            a.ShowDialog(this);
        }

        private void выделитьВсеToolStripMenuItem1_Click(object sender, EventArgs e)
        {
            customRTB.SelectAll();
        }      
       

        private void changeKeyToolStripMenuItem_Click(object sender, EventArgs e)
        {
           
        }

        public int FindMyTextNext(string text, int start)
        {
            int returnValue = -1;
            if (text.Length > 0 && start >= 0)
            {
                int indexToText = customRTB.Find(text, start, RichTextBoxFinds.MatchCase);
                if (indexToText >= 0)
                {
                    returnValue = indexToText;
                }
            }
            return returnValue;
        }

        private void textBox1_TextChanged(object sender, EventArgs e)
        {
            bool isexist = customRTB.Highlight(searchTextBox.Text, ps.HighlightsColor, chkMatchCase.Checked, chkMatchWholeWord.Checked);
        }

        private void searchTextBox_KeyDown(object sender, KeyEventArgs e)
        {
            if (e.KeyCode == Keys.Escape)
            {
                searchTextBox.Text = "";
                panel1.Visible = false;
                customRTB.Height = customRTB.Height += 27;
                customRTB.Focus();
                customRTB.DeselectAll();
                e.Handled = e.SuppressKeyPress = true;
            }
        }

        private void customRTB_SelectionChanged_1(object sender, EventArgs e)
        {
            LineAndColumn();
        }

        private void customRTB_TextChanged(object sender, EventArgs e)
        {
            textSave = 1;
            LineAndColumn();
        }

        private void settingsToolStripMenuItem_Click(object sender, EventArgs e)
        {
            SettingsForm sf = new SettingsForm();

            sf.StartPosition = FormStartPosition.Manual;
            sf.Location = new Point(this.Location.X + (this.Width - sf.Width) / 2, this.Location.Y + (this.Height - sf.Height) / 2);
            sf.ShowDialog(this);
        }

        private void MainWindow_Activated(object sender, EventArgs e)
        {
            customRTB.Font = new Font(ps.RichTextFont, ps.RichTextSize);
            customRTB.ForeColor = ps.RichForeColor;
            customRTB.BackColor = ps.RichBackColor;
        }

        private void chkMatchCase_CheckedChanged(object sender, EventArgs e)
        {
            bool isexist = customRTB.Highlight(searchTextBox.Text, ps.HighlightsColor, chkMatchCase.Checked, chkMatchWholeWord.Checked);
        }

        private void chkMatchWholeWord_CheckedChanged(object sender, EventArgs e)
        {
            bool isexist = customRTB.Highlight(searchTextBox.Text, ps.HighlightsColor, chkMatchCase.Checked, chkMatchWholeWord.Checked);
        }

        private void pictureBox1_Click(object sender, EventArgs e)
        {
            searchTextBox.Text = "";
            panel1.Visible = false;
            customRTB.Height = customRTB.Height += 27;
            customRTB.Focus();
            SendMessage(customRTB.Handle, (uint)0x00B6, (UIntPtr)0, (IntPtr)(1));
            customRTB.DeselectAll();
        }

        private void findToolStripMenuItem2_Click(object sender, EventArgs e)
        {
            if (panel1.Visible == false)
            {
                panel1.Visible = true;
                searchTextBox.Focus();
                SendMessage(customRTB.Handle, (uint)0x00B6, (UIntPtr)0, (IntPtr)(-1));
                customRTB.Height = customRTB.Height - 27;
                return;
            }

            if (panel1.Visible == true)
            {
                searchTextBox.Text = "";
                panel1.Visible = false;
                customRTB.Height = customRTB.Height += 27;
                customRTB.Focus();
                SendMessage(customRTB.Handle, (uint)0x00B6, (UIntPtr)0, (IntPtr)(1));
                customRTB.DeselectAll();
            }
        }

        private void documentationToolStripMenuItem_Click(object sender, EventArgs e)
        {

        }
    }
}