using bzit.bomg.Models;
using ICSharpCode.SharpZipLib.Zip;
using Newtonsoft.Json;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.IO;
using System.Text;
using System.Windows.Forms;
using System.Xml;
using static RyzStudio.Windows.Forms.BookmarkTreeView;
using TextBoxForm = RyzStudio.Windows.ThemedForms.TextBoxForm;
using Resources = bzit.bomg.Properties.Resources;

namespace bzit.bomg
{
    public partial class MainForm : Form
    {
        public enum AppMode
        {
            Clear = 0,
            Open,
            New
        }

        public enum LoadFileType
        {
            None = 0,
            Jsnx,
            Ryz
        }

        protected BackgroundWorker loadFileThread = null;
        protected LoadFileType loadFileType = LoadFileType.None;

        protected AppMode appMode = AppMode.Clear;
        protected string sessionFilename = null;
        protected string sessionPassword = null;
        protected bool usePassword = false;

        public MainForm()
        {
            InitializeComponent();

            if (loadFileThread == null)
            {
                loadFileThread = new BackgroundWorker();
                loadFileThread.WorkerReportsProgress = loadFileThread.WorkerSupportsCancellation = true;
            }

            loadFileThread.DoWork += loadFileThread_DoWork;
            loadFileThread.RunWorkerCompleted += loadFileThread_RunWorkerCompleted;

            treeView1.OnNodeChanged += treeView1_OnNodeChanged;
        }

        protected override void OnLoad(EventArgs e)
        {
            base.OnLoad(e);

            bool rv = false;
            string iconDBFilename = Path.ChangeExtension(Application.ExecutablePath, ".db");

            string errorMessage;
            rv = treeView1.InitialiseIconDatabase(out errorMessage, iconDBFilename);
            if (!rv)
            {
                MessageBox.Show("Can not find icon database. [" + errorMessage + "]");
                this.Close();
            }

            this.ApplicationMode = AppMode.Clear;

            sessionFilename = sessionPassword = null;
            usePassword = false;
        }

        protected override void OnShown(EventArgs e)
        {
            base.OnShown(e);

            this.Height = Screen.PrimaryScreen.WorkingArea.Height;
            this.Location = Screen.PrimaryScreen.WorkingArea.Location;

            // command line
            string[] args = Environment.GetCommandLineArgs();

            if (args.Length > 1)
            {
                int i = 1;
                while (true)
                {
                    if (i > (args.Length - 1))
                    {
                        break;
                    }

                    switch (args[i].Trim().ToLower())
                    {
                        case "-o":
                        case "-open":
                            if ((i + 1) > (args.Length - 1)) break;

                            string openFilename = args[(i + 1)];
                            if (string.IsNullOrWhiteSpace(openFilename)) break;
                            if (!File.Exists(openFilename)) break;

                            string openExtension = Path.GetExtension(openFilename).Trim('.');
                            if (openExtension.Equals("jsnx", StringComparison.CurrentCultureIgnoreCase))
                            {
                                loadBookmarkFile(openFilename, 1);
                            }
                            else if (openExtension.Equals("ryz", StringComparison.CurrentCultureIgnoreCase))
                            {
                                loadBookmarkFile(openFilename, 2);
                            }

                            i++;
                            break;
                    }

                    i++;
                }
            }
        }

        protected override void OnFormClosing(FormClosingEventArgs e)
        {
            if (this.IsBusy)
            {
                e.Cancel = true;
                return;
            }

            if (this.ApplicationMode == AppMode.Clear)
            {
                // do later
            }
            else
            {
                if (treeView1.HasChanged)
                {
                    if (this.ApplicationMode == AppMode.New)
                    {
                        DialogResult response = MessageBox.Show("Save bookmarks", "Save?", MessageBoxButtons.YesNoCancel, MessageBoxIcon.Question);
                        if (response == DialogResult.Yes)
                        {
                            bool hasSaved = saveAsBookmarkFile();
                            if (!hasSaved)
                            {
                                e.Cancel = true;
                                return;
                            }
                        }
                        else if (response == DialogResult.No)
                        {
                            // do later
                        }
                        else if (response == DialogResult.Cancel)
                        {
                            e.Cancel = true;
                            return;
                        }
                    }
                    else if (this.ApplicationMode == AppMode.Open)
                    {
                        DialogResult response = MessageBox.Show("Save changes to open bookmarks", "Save?", MessageBoxButtons.YesNoCancel, MessageBoxIcon.Question);
                        if (response == DialogResult.Yes)
                        {
                            if (usePassword)
                            {
                                if (string.IsNullOrWhiteSpace(sessionPassword))
                                {
                                    TextBoxForm passwordForm = new TextBoxForm("Password", "Password", true);
                                    sessionPassword = passwordForm.ShowDialog();
                                }
                            }

                            saveBookmarkFile_ForJSNX(sessionFilename, sessionPassword ?? string.Empty);
                        }
                        else if (response == DialogResult.No)
                        {
                            // do later
                        }
                        else if (response == DialogResult.Cancel)
                        {
                            e.Cancel = true;
                            return;
                        }
                    }
                }
                else
                {
                    // do later
                }
            }

            treeView1.CloseIconDatabase();

            treeView1.Clear();
            this.ApplicationMode = AppMode.Clear;
            sessionFilename = sessionPassword = null;

            Application.Exit();
        }

        protected AppMode ApplicationMode
        {
            get => appMode;
            set
            {
                appMode = value;

                switch (value)
                {
                    case AppMode.Clear:
                        this.Text = Properties.Resources.app_name;

                        closeFileMenuItem.Enabled = false;
                        saveFileMenuItem.Enabled = saveMenuBarItem.Enabled = false;
                        saveAsFileMenuItem.Enabled = false;
                        findEditMenuItem.Enabled = false;
                        expandAllViewMenuItem.Enabled = collapseAllViewMenuItem.Enabled = false;
                        optionsToolMenuItem.Enabled = false;

                        break;
                    case AppMode.Open:
                        closeFileMenuItem.Enabled = true;
                        saveFileMenuItem.Enabled = saveMenuBarItem.Enabled = true;
                        saveAsFileMenuItem.Enabled = true;
                        findEditMenuItem.Enabled = true;
                        expandAllViewMenuItem.Enabled = collapseAllViewMenuItem.Enabled = true;
                        optionsToolMenuItem.Enabled = true;

                        break;
                    case AppMode.New:
                        this.Text = Properties.Resources.app_name;

                        closeFileMenuItem.Enabled = true;
                        saveFileMenuItem.Enabled = saveMenuBarItem.Enabled = true;
                        saveAsFileMenuItem.Enabled = true;
                        findEditMenuItem.Enabled = true;
                        expandAllViewMenuItem.Enabled = collapseAllViewMenuItem.Enabled = true;
                        optionsToolMenuItem.Enabled = true;

                        break;
                }
            }
        }

        protected bool IsBusy
        {
            get
            {
                return loadFileThread.IsBusy;
            }
            set
            {
                treeView1.Enabled = !value;
            }
        }

        #region toolbar

        private void fileNewMenuItem_Click(object sender, EventArgs e)
        {
            if (this.IsBusy)
            {
                return;
            }

            if (this.ApplicationMode == AppMode.Clear)
            {
                // do later
            }
            else
            {
                if (treeView1.HasChanged)
                {
                    if (this.ApplicationMode == AppMode.New)
                    {
                        DialogResult response = MessageBox.Show("Save bookmarks", "Save?", MessageBoxButtons.YesNoCancel, MessageBoxIcon.Question);
                        if (response == DialogResult.Yes)
                        {
                            bool hasSaved = saveAsBookmarkFile();
                            if (!hasSaved)
                            {
                                return;
                            }
                        }
                        else if (response == DialogResult.No)
                        {
                            // do later
                        }
                        else if (response == DialogResult.Cancel)
                        {
                            return;
                        }
                    }
                    else if (this.ApplicationMode == AppMode.Open)
                    {
                        DialogResult response = MessageBox.Show("Save changes to open bookmarks", "Save?", MessageBoxButtons.YesNoCancel, MessageBoxIcon.Question);
                        if (response == DialogResult.Yes)
                        {
                            if (usePassword)
                            {
                                if (string.IsNullOrWhiteSpace(sessionPassword))
                                {
                                    TextBoxForm passwordForm = new TextBoxForm("Password", "Password", true);
                                    sessionPassword = passwordForm.ShowDialog();
                                }
                            }

                            saveBookmarkFile_ForJSNX(sessionFilename, sessionPassword ?? string.Empty);
                        }
                        else if (response == DialogResult.No)
                        {
                            // do later
                        }
                        else if (response == DialogResult.Cancel)
                        {
                            return;
                        }
                    }
                }
                else
                {
                    // do later
                }
            }

            TextBoxForm newSessionForm = new TextBoxForm("New Session", "Name");
            string rv = newSessionForm.ShowDialog();
            if (string.IsNullOrWhiteSpace(rv))
            {
                return;
            }

            treeView1.Clear(rv);

            this.ApplicationMode = AppMode.New;
            sessionFilename = sessionPassword = null;
        }

        private void fileOpenMenuItem_Click(object sender, EventArgs e)
        {
            if (this.IsBusy)
            {
                return;
            }

            if (this.ApplicationMode == AppMode.Clear)
            {
                // do later
            }
            else
            {
                if (treeView1.HasChanged)
                {
                    if (this.ApplicationMode == AppMode.New)
                    {
                        DialogResult response = MessageBox.Show("Save bookmarks", "Save?", MessageBoxButtons.YesNoCancel, MessageBoxIcon.Question);
                        if (response == DialogResult.Yes)
                        {
                            bool hasSaved = saveAsBookmarkFile();
                            if (!hasSaved)
                            {
                                return;
                            }
                        }
                        else if (response == DialogResult.No)
                        {
                            // do later
                        }
                        else if (response == DialogResult.Cancel)
                        {
                            return;
                        }
                    }
                    else if (this.ApplicationMode == AppMode.Open)
                    {
                        DialogResult response = MessageBox.Show("Save changes to open bookmarks", "Save?", MessageBoxButtons.YesNoCancel, MessageBoxIcon.Question);
                        if (response == DialogResult.Yes)
                        {
                            if (usePassword)
                            {
                                if (string.IsNullOrWhiteSpace(sessionPassword))
                                {
                                    TextBoxForm passwordForm = new TextBoxForm("Password", "Password", true);
                                    sessionPassword = passwordForm.ShowDialog();
                                }
                            }

                            saveBookmarkFile_ForJSNX(sessionFilename, sessionPassword ?? string.Empty);
                        }
                        else if (response == DialogResult.No)
                        {
                            // do later
                        }
                        else if (response == DialogResult.Cancel)
                        {
                            return;
                        }
                    }
                }
                else
                {
                    // do later
                }
            }

            if (openFileDialog.ShowDialog() == DialogResult.OK)
            {
                loadBookmarkFile(openFileDialog.FileName, openFileDialog.FilterIndex);
            }
        }

        private void fileCloseMenuItem_Click(object sender, EventArgs e)
        {
            if (this.IsBusy)
            {
                return;
            }

            if (this.ApplicationMode == AppMode.Clear)
            {
                // do later
            }
            else
            {
                if (treeView1.HasChanged)
                {
                    if (this.ApplicationMode == AppMode.New)
                    {
                        DialogResult response = MessageBox.Show("Save bookmarks", "Save?", MessageBoxButtons.YesNoCancel, MessageBoxIcon.Question);
                        if (response == DialogResult.Yes)
                        {
                            bool hasSaved = saveAsBookmarkFile();
                            if (!hasSaved)
                            {
                                return;
                            }
                        }
                        else if (response == DialogResult.No)
                        {
                            // do later
                        }
                        else if (response == DialogResult.Cancel)
                        {
                            return;
                        }
                    }
                    else if (this.ApplicationMode == AppMode.Open)
                    {
                        DialogResult response = MessageBox.Show("Save changes to open bookmarks", "Save?", MessageBoxButtons.YesNoCancel, MessageBoxIcon.Question);
                        if (response == DialogResult.Yes)
                        {
                            if (usePassword)
                            {
                                if (string.IsNullOrWhiteSpace(sessionPassword))
                                {
                                    TextBoxForm passwordForm = new TextBoxForm("Password", "Password", true);
                                    sessionPassword = passwordForm.ShowDialog();
                                }
                            }

                            saveBookmarkFile_ForJSNX(sessionFilename, sessionPassword ?? string.Empty);
                        }
                        else if (response == DialogResult.No)
                        {
                            // do later
                        }
                        else if (response == DialogResult.Cancel)
                        {
                            return;
                        }
                    }
                }
                else
                {
                    // do later
                }
            }

            treeView1.Clear();
            this.ApplicationMode = AppMode.Clear;
            sessionFilename = sessionPassword = null;
        }

        private void fileSaveMenuItem_Click(object sender, EventArgs e)
        {
            if (this.IsBusy)
            {
                return;
            }

            if (this.ApplicationMode == AppMode.New)
            {
                DialogResult response = MessageBox.Show("Save bookmarks", "Save?", MessageBoxButtons.YesNoCancel, MessageBoxIcon.Question);
                if (response == DialogResult.Yes)
                {
                    bool hasSaved = saveAsBookmarkFile();
                    if (!hasSaved)
                    {
                        return;
                    }
                }
                else if (response == DialogResult.No)
                {
                    return;
                }
                else if (response == DialogResult.Cancel)
                {
                    return;
                }
            }
            else if (this.ApplicationMode == AppMode.Open)
            {
                if (usePassword)
                {
                    if (string.IsNullOrWhiteSpace(sessionPassword))
                    {
                        TextBoxForm passwordForm = new TextBoxForm("Password", "Password", true);
                        sessionPassword = passwordForm.ShowDialog();
                    }
                }

                saveBookmarkFile_ForJSNX(sessionFilename, sessionPassword ?? string.Empty);
            }
        }

        private void fileSaveAsMenuItem_Click(object sender, EventArgs e)
        {
            if (this.IsBusy)
            {
                return;
            }

            if (this.ApplicationMode == AppMode.Clear)
            {
                return;
            }

            bool hasSaved = saveAsBookmarkFile();
            if (!hasSaved)
            {
                return;
            }
        }

        private void fileExitMenuItem_Click(object sender, EventArgs e)
        {
            if (this.IsBusy)
            {
                return;
            }

            this.Close();
        }

        private void editFindMenuItem_Click(object sender, EventArgs e)
        {
            if (this.IsBusy)
            {
                return;
            }

            FindForm findForm = new FindForm(this);
            findForm.Show();
        }

        private void viewExpandAllMenuItem_Click(object sender, EventArgs e)
        {
            if (this.IsBusy)
            {
                return;
            }

            if (this.ApplicationMode == AppMode.Clear)
            {
                return;
            }

            if (treeView1.SelectedNode == null)
            {
                treeView1.ExpandAll();
            }
            else
            {
                treeView1.SelectedNode.ExpandAll();
            }
        }

        private void viewCollapseAllMenuItem_Click(object sender, EventArgs e)
        {
            if (this.IsBusy)
            {
                return;
            }

            if (this.ApplicationMode == AppMode.Clear)
            {
                return;
            }

            if (treeView1.SelectedNode == null)
            {
                treeView1.CollapseAll();
            }
            else
            {
                treeView1.SelectedNode.Collapse(false);
            }
        }

        private void viewAlwaysOnTopMenuItem_Click(object sender, EventArgs e)
        {
            this.TopMost = !this.TopMost;

            alwaysOnTopToolStripMenuItem1.Checked = this.TopMost;
        }

        private void toolsOptionsMenuItem_Click(object sender, EventArgs e)
        {
            if (this.IsBusy)
            {
                return;
            }

            OptionForm optionForm = new OptionForm(this);
            optionForm.ShowDialog();
        }

        private void helpViewHelpMenuItem_Click(object sender, EventArgs e)
        {
            try
            {
                System.Diagnostics.Process.Start(Resources.url_help);
            }
            catch
            {
                // do nothing
            }
        }

        private void helpAboutMenuItem_Click(object sender, EventArgs e)
        {
            try
            {
                System.Diagnostics.Process.Start(Resources.url_about);
            }
            catch
            {
                // do nothing
            }
        }

        #endregion

        protected void loadBookmarkFile(string filename, int filterIndex)
        {
            switch (filterIndex)
            {
                case 1:
                    if (RyzStudio.IO.SharpZipLib.IsZipEncrypted(filename))
                    {
                        TextBoxForm passwordForm = new TextBoxForm("Password", "Password", true);
                        string password = string.Empty;

                        while (true)
                        {
                            password = passwordForm.ShowDialog();
                            if (string.IsNullOrWhiteSpace(password))
                            {
                                break;
                            }

                            if (RyzStudio.IO.SharpZipLib.TestZipEncrypted(filename, password))
                            {
                                sessionFilename = filename;
                                sessionPassword = password;
                                usePassword = true;

                                loadFileType = LoadFileType.Jsnx;

                                break;
                            }
                        }
                    }
                    else
                    {
                        sessionFilename = filename;
                        sessionPassword = null;
                        usePassword = false;

                        loadFileType = LoadFileType.Jsnx;
                    }

                    break;
                case 2:
                    if (RyzStudio.IO.SharpZipLib.IsZipEncrypted(filename))
                    {
                        TextBoxForm passwordForm = new TextBoxForm("Password", "Password", true);
                        string password = string.Empty;

                        while (true)
                        {
                            password = passwordForm.ShowDialog();
                            if (string.IsNullOrWhiteSpace(password))
                            {
                                break;
                            }

                            if (RyzStudio.IO.SharpZipLib.TestZipEncrypted(filename, password))
                            {
                                sessionFilename = filename;
                                sessionPassword = password;
                                usePassword = true;

                                loadFileType = LoadFileType.Ryz;

                                break;
                            }
                        }
                    }
                    else
                    {
                        sessionFilename = filename;
                        sessionPassword = null;
                        usePassword = false;

                        loadFileType = LoadFileType.Ryz;
                    }

                    break;
                default:
                    sessionFilename = sessionPassword = null;
                    usePassword = false;
                    break;
            }

            if (string.IsNullOrWhiteSpace(sessionFilename))
            {
                return;
            }

            this.IsBusy = true;

            loadFileThread.RunWorkerAsync();
        }

        protected void loadBookmarkFile_ForJSNX(string filename, string password = "")
        {
            int size = 2048;
            byte[] buffer = new byte[size];
            int bufferSize = 0;

            List<BookmarkItemViewModel> rs = null;

            ZipEntry readEntry = null;
            ZipInputStream readStream = new ZipInputStream(File.OpenRead(filename));
            readStream.Password = password;

            while (true)
            {
                readEntry = readStream.GetNextEntry();
                if (readEntry == null)
                {
                    break;
                }

                if (string.IsNullOrWhiteSpace(readEntry.Name))
                {
                    continue;
                }

                if (!readEntry.IsFile)
                {
                    continue;
                }

                if (!readEntry.Name.Equals("bookmarks.json"))
                {
                    continue;
                }

                MemoryStream ms = new MemoryStream();
                buffer = new byte[size];
                bufferSize = 0;

                do
                {
                    bufferSize = readStream.Read(buffer, 0, buffer.Length);
                    ms.Write(buffer, 0, bufferSize);
                }
                while (bufferSize > 0);

                ms.Position = 0;

                StreamReader sr = new StreamReader(ms);
                rs = JsonConvert.DeserializeObject<List<BookmarkItemViewModel>>(sr.ReadToEnd());

                break;
            }

            readStream.Flush();
            readStream.Close();
            readStream.Dispose();
            readStream = null;

            treeView1.AddItem(rs);

            if (this.InvokeRequired)
            {
                this.Invoke(new MethodInvoker(() =>
                {
                    this.ApplicationMode = AppMode.Open;
                }));
            }
            else
            {
                this.ApplicationMode = AppMode.Open;
            }

            RyzStudio.Windows.Forms.ThreadControl.SetText(this, Path.GetFileNameWithoutExtension(filename) + " - " + Resources.app_name);
        }

        protected void loadBookmarkFile_ForRYZ(string filename, string password = "")
        {
            int size = 2048;
            byte[] buffer = new byte[size];
            int bufferSize = 0;

            List<BookmarkItemViewModel> rs = new List<BookmarkItemViewModel>();

            ZipEntry readEntry = null;
            ZipInputStream readStream = new ZipInputStream(File.OpenRead(filename));
            readStream.Password = password;

            while (true)
            {
                readEntry = readStream.GetNextEntry();
                if (readEntry == null)
                {
                    break;
                }

                if (string.IsNullOrWhiteSpace(readEntry.Name))
                {
                    continue;
                }

                if (!readEntry.IsFile)
                {
                    continue;
                }

                if (!readEntry.Name.Equals("bookmarks.xml"))
                {
                    continue;
                }

                MemoryStream ms = new MemoryStream();
                buffer = new byte[size];
                bufferSize = 0;

                do
                {
                    bufferSize = readStream.Read(buffer, 0, buffer.Length);
                    ms.Write(buffer, 0, bufferSize);
                }
                while (bufferSize > 0);

                ms.Position = 0;

                // read stream
                StreamReader sr = new StreamReader(ms);

                // load xml
                XmlDocument xmlDocument = new XmlDocument();
                xmlDocument.LoadXml(sr.ReadToEnd());

                // parse
                XmlNode xnl = xmlDocument.SelectSingleNode("bomg/b/g");
                if (xnl == null)
                {
                    break;
                }

                string rootName = (xnl.Attributes["name"] == null) ? "Bookmarks" : (string.IsNullOrWhiteSpace(xnl.Attributes["name"].InnerText) ? "Bookmarks" : xnl.Attributes["name"].InnerText.Trim());

                foreach (XmlNode xn in xnl.ChildNodes)
                {
                    BookmarkItemViewModel viewModel = new BookmarkItemViewModel();

                    foreach (XmlNode xn2 in xn.ChildNodes)
                    {
                        switch (xn2.LocalName)
                        {
                            case "name":
                                viewModel.SiteName = xn2.InnerText?.Trim();
                                break;
                            case "address":
                                viewModel.SiteAddress = xn2.InnerText?.Trim();
                                break;
                            case "description":
                                viewModel.SiteDescription = xn2.InnerText?.Trim();
                                break;
                            //case "created":
                            //    bi.Created = xn2.InnerText?.Trim();
                            //    break;
                            default:
                                break;
                        }
                    }

                    // fix fullpath and name
                    if (viewModel.SiteName.Contains("|"))
                    {
                        StringBuilder sb = new StringBuilder();
                        sb.Append("\\");
                        sb.Append(System.Web.HttpUtility.UrlEncode(rootName));
                        sb.Append("\\");

                        string[] pathParts = viewModel.SiteName.Split('|');
                        for (int i = 0; i < (pathParts.Length - 1); i++)
                        {
                            sb.Append(pathParts[i]);
                            //sb.Append(System.Web.HttpUtility.UrlDecode(pathParts[i]));
                            sb.Append("\\");
                        }

                        viewModel.SiteName = System.Web.HttpUtility.UrlDecode(pathParts[(pathParts.Length - 1)] ?? string.Empty);
                        viewModel.TreeviewPath = sb.ToString();
                    }
                    else
                    {
                        viewModel.SiteName = System.Web.HttpUtility.UrlDecode(viewModel.SiteName);
                        viewModel.TreeviewPath = string.Format("\\{0}\\", System.Web.HttpUtility.UrlEncode(rootName));
                    }

                    rs.Add(viewModel);
                }

                break;
            }

            readStream.Flush();
            readStream.Close();
            readStream.Dispose();
            readStream = null;

            treeView1.AddItem(rs);

            sessionFilename = sessionPassword = null;
            usePassword = !string.IsNullOrWhiteSpace(password);

            if (this.InvokeRequired)
            {
                this.Invoke(new MethodInvoker(() =>
                {
                    this.ApplicationMode = AppMode.New;
                }));
            }
            else
            {
                this.ApplicationMode = AppMode.New;
            }

            RyzStudio.Windows.Forms.ThreadControl.SetText(this, Path.GetFileNameWithoutExtension(filename) + " - " + Resources.app_name);
        }

        protected void openBookmark(TreeNode node)
        {
            if (treeView1.GetNodeType(node) != RyzStudio.Windows.Forms.BookmarkTreeView.NodeType.Page)
            {
                return;
            }

            BookmarkItemViewModel viewModel = (BookmarkItemViewModel)node.Tag;
            if (viewModel == null)
            {
                return;
            }

            if (string.IsNullOrWhiteSpace(viewModel.SiteAddress))
            {
                return;
            }

            try
            {
                System.Diagnostics.Process.Start(viewModel.SiteAddress);
            }
            catch
            {
                // do nothing
            }
        }

        protected bool saveAsBookmarkFile()
        {
            if (saveFileDialog.ShowDialog() == DialogResult.OK)
            {
                switch (saveFileDialog.FilterIndex)
                {
                    case 1:
                        saveBookmarkFile_ForJSNX(saveFileDialog.FileName);

                        this.Text = Path.GetFileNameWithoutExtension(saveFileDialog.FileName) + " - " + Properties.Resources.app_name;

                        sessionFilename = saveFileDialog.FileName;
                        usePassword = false;
                        this.ApplicationMode = AppMode.Open;
                        treeView1.HasChanged = false;
                        break;
                    case 2:
                        TextBoxForm passwordForm = new TextBoxForm("Password", "Password", true);
                        string password = passwordForm.ShowDialog();

                        saveBookmarkFile_ForJSNX(saveFileDialog.FileName, password ?? string.Empty);

                        this.Text = Path.GetFileNameWithoutExtension(saveFileDialog.FileName) + " - " + Properties.Resources.app_name;

                        sessionFilename = saveFileDialog.FileName;
                        sessionPassword = password;
                        usePassword = true;
                        this.ApplicationMode = AppMode.Open;
                        treeView1.HasChanged = false;
                        break;
                    default: break;
                }

                return true;
            }
            else
            {
                return false;
            }
        }

        protected void saveBookmarkFile_ForJSNX(string filename, string password = "")
        {
            List<BookmarkItemViewModel> rs = treeView1.GetBookmarkList();

            int size = 2048;
            byte[] buffer = new byte[size];
            int bufferSize = 0;

            ZipOutputStream zipStream = new ZipOutputStream(File.Create(filename));
            zipStream.SetLevel(9);
            zipStream.Password = password;

            // stream
            MemoryStream ms = new MemoryStream(System.Text.Encoding.UTF8.GetBytes(JsonConvert.SerializeObject(rs)));
            ms.Position = 0;

            // write file entry
            zipStream.PutNextEntry(new ZipEntry("bookmarks.json"));

            buffer = new byte[size];
            bufferSize = 0;

            do
            {
                bufferSize = ms.Read(buffer, 0, buffer.Length);
                zipStream.Write(buffer, 0, bufferSize);
            }
            while (bufferSize > 0);

            ms.Flush();
            ms.Close();
            ms.Dispose();
            ms = null;

            zipStream.Finish();
            zipStream.Flush();
            zipStream.Close();
            zipStream.Dispose();
            zipStream = null;

            treeView1.HasChanged = false;
        }

        protected void treeView1_NodeMouseClick(object sender, TreeNodeMouseClickEventArgs e)
        {
            if (e.Button != MouseButtons.Right)
            {
                return;
            }

            switch (treeView1.SNode.GetNodeType())
            {
                case RyzStudio.Windows.Forms.BookmarkTreeView.NodeType.Root:
                    rootTreeNodeMenu.Show(e.Node.TreeView, e.X, e.Y);
                    break;
                case RyzStudio.Windows.Forms.BookmarkTreeView.NodeType.Folder:
                    folderTreeNodeMenu.Show(e.Node.TreeView, e.X, e.Y);
                    break;
                case RyzStudio.Windows.Forms.BookmarkTreeView.NodeType.Page:
                    pageTreeNodeMenu.Show(e.Node.TreeView, e.X, e.Y);
                    break;
                default:
                    break;
            }
        }

        protected void treeView1_NodeMouseDoubleClick(object sender, TreeNodeMouseClickEventArgs e) => openBookmark(e.Node);

        protected void treeView1_PreviewKeyDown(object sender, PreviewKeyDownEventArgs e)
        {
            TreeNode tn = treeView1.SelectedNode;
            if (tn == null)
            {
                return;
            }

            NodeType nodeType = treeView1.SNode.GetNodeType();

            switch (e.KeyCode)
            {
                case Keys.Apps:
                    treeView1_NodeMouseClick(sender, new TreeNodeMouseClickEventArgs(tn, MouseButtons.Right, 1, tn.Bounds.X, tn.Bounds.Y));
                    return;
                case Keys.Enter:
                    openBookmark(tn);
                    break;
                case Keys.F2:
                    if (nodeType == NodeType.Page)
                    {
                        (new BookmarkEditForm(treeView1)).ShowDialog();
                    }

                    break;
                case Keys.Insert:
                    if (e.Modifiers != Keys.Shift)
                    {
                        if ((nodeType == NodeType.Root) || (nodeType == NodeType.Folder))
                        {
                            (new BookmarkEditForm(treeView1)).ShowDialog();
                        }
                        else if (nodeType == NodeType.Page)
                        {
                            treeView1.SelectedNode = tn.Parent;

                            (new BookmarkEditForm(treeView1)).ShowDialog();
                        }
                    }

                    break;
                default: break;
            }
        }

        #region root context menu

        private void addPageContextMenu_Click(object sender, EventArgs e) => (new BookmarkEditForm(treeView1)).ShowDialog();

        private void addFolderContextMenu_Click(object sender, EventArgs e) => treeView1.SelectedNode = treeView1.SNode.AddFolder();

        private void editContextMenu_Click(object sender, EventArgs e) => treeView1.SNode.Edit();

        private void sortContextMenu_Click(object sender, EventArgs e) => treeView1.SNode.Sort();

        #endregion

        #region folder context menu

        private void addPageContextMenu2_Click(object sender, EventArgs e) => (new BookmarkEditForm(treeView1)).ShowDialog();

        private void addFolderContextMenu2_Click(object sender, EventArgs e) => treeView1.SelectedNode = treeView1.SNode.AddFolder();

        private void openAllContextMenu_Click(object sender, EventArgs e)
        {
            if (treeView1.SelectedNode == null)
            {
                return;
            }

            if (treeView1.SelectedNode.Nodes.Count <= 0)
            {
                return;
            }

            foreach (TreeNode item in treeView1.SelectedNode.Nodes)
            {
                openBookmark(item);
            }
        }

        private void editContextMenu2_Click(object sender, EventArgs e) => treeView1.SNode.Edit();

        private void deleteContextMenu_Click(object sender, EventArgs e) => treeView1.SNode.Delete();

        private void sortContextMenu2_Click(object sender, EventArgs e) => treeView1.SNode.Sort();

        private void moveUpContextMenu_Click(object sender, EventArgs e) => treeView1.SNode.MoveUp();

        private void moveDownContextMenu_Click(object sender, EventArgs e) => treeView1.SNode.MoveDown();

        #endregion

        #region page context menu

        private void openContextMenu_Click(object sender, EventArgs e) => openBookmark(treeView1.SelectedNode);

        private void editContextMenu3_Click(object sender, EventArgs e) => (new BookmarkEditForm(treeView1)).ShowDialog();

        private void deleteContextMenu2_Click(object sender, EventArgs e) => treeView1.SNode.Delete();

        private void moveUpContextMenu2_Click(object sender, EventArgs e) => treeView1.SNode.MoveUp();

        private void moveDownContextMenu2_Click(object sender, EventArgs e) => treeView1.SNode.MoveDown();

        #endregion

        protected void treeView1_OnNodeChanged(object sender, EventArgs e)
        {
            if (this.InvokeRequired)
            {
                this.Invoke(new MethodInvoker(() => {
                    saveMenuBarItem.Enabled = saveFileMenuItem.Enabled = treeView1.HasChanged;
                }));
            }
            else
            {
                saveMenuBarItem.Enabled = saveFileMenuItem.Enabled = treeView1.HasChanged;
            }
        }

        private void loadFileThread_DoWork(object sender, DoWorkEventArgs e)
        {
            if (loadFileType == LoadFileType.Jsnx)
            {
                loadBookmarkFile_ForJSNX(sessionFilename, sessionPassword ?? string.Empty);
            }
            else if (loadFileType == LoadFileType.Ryz)
            {
                loadBookmarkFile_ForRYZ(sessionFilename, sessionPassword ?? string.Empty);
            }
        }

        private void loadFileThread_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
        {
            this.IsBusy = false;
            saveMenuBarItem.Enabled = saveFileMenuItem.Enabled = false;
        }

    }
}