when I drag and drop folder to the file list and new rpa creation its subfolders structure is ignored now and all placed to one folder:
```
using System;
using System.Collections;
using System.Collections.Generic;
using System.Diagnostics;
using System.Drawing;
using System.IO;
using System.Runtime.InteropServices;
using System.Text.RegularExpressions;
using System.Threading;
using System.Threading.Tasks;
using System.Windows.Forms;
using LibVLCSharp.Shared;
using Microsoft.Win32;
using NeoSmart.PrettySize;
using RPA_Parser;

namespace RPA_Explorer
{
    public partial class RpaExplorer : Form
    {
        private RpaParser _rpaParser;
        private RpaParser _rpaParserBak;
        private Thread _operation;
        private bool _operationEnabled = true;
        private bool _archiveChanged;
        private bool _cancelAdd;
        private bool _archiveLoaded;
        private SortedDictionary<string, RpaParser.ArchiveIndex> _fileListBackup = new();
        private readonly Dictionary<string, long> _indexPathSize = new();
        private readonly List<string> _expandedList = new();
        private bool _switchTabs;
        private readonly LibVLC _libVlc; // https://code.videolan.org/mfkl/libvlcsharp-samples
        private MemoryStream _memoryStreamVlc;
        private StreamMediaInput _streamMediaInputVlc;
        private Media _mediaVlc;
        private int _searchStartIndex = 0;
        private static readonly FileInfo _appInfo = new(System.Reflection.Assembly.GetEntryAssembly()?.Location ?? throw new InvalidOperationException());
        private static readonly FileInfo _appName = new(System.Reflection.Assembly.GetEntryAssembly()?.GetName().Name ?? throw new InvalidOperationException());
        private readonly string settingsPath = Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData) + "/" + _appName + @"/settings.ini";

        private static readonly System.ComponentModel.ComponentResourceManager Lang = new(typeof(Lang));

        private static Settings settings;

        public RpaExplorer()
        {
            // Form initiation
            InitializeComponent();

            Directory.CreateDirectory(Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData) + "/" + _appName);

            settings = new Settings(settingsPath);

            // Language initiation
            foreach (Settings.Language lang in settings.LangList)
            {
                toolStripComboBox1.Items.Add(lang.Name);
            }

            toolStripComboBox1.SelectedItem = settings.GetLang().Name;

            LoadTexts();

            // LibVLC initiation
            Core.Initialize();
            _libVlc = new LibVLC("--input-repeat=9999999"); // --input-repeat=X : Loop X times
            videoView1.MediaPlayer = new MediaPlayer(_libVlc);
            videoView1.MediaPlayer.Volume = 50;
            videoView1.MediaPlayer.TimeChanged += videoView1_MediaPlayer_TimeChanged;
            videoView1.BackgroundImage = null;
            SetMediaTimeLabel(0, 0);

            // Initialize the seek bar
            seekBar.Maximum = 1000; // Set maximum value for smooth seeking
            seekBar.Scroll += SeekBar_Scroll; // Handle scroll events for seeking

            // Subscribe to the TabControl's SelectedIndexChanged event
            tabControl1.SelectedIndexChanged += TabControl1_SelectedIndexChanged;

            // Hide the seek bar initially
            seekBar.Visible = false;

            // TreeView styles initiation
            ImageList imageList = new ImageList();
            imageList.Images.Add(Resources.treeView1_Image_folder);
            imageList.Images.Add(Resources.treeView1_Image_file);
            imageList.Images.Add(Resources.treeView1_Image_fileChanged);
            treeView1.ImageList = imageList;

            // Arguments processing
            string[] args = Environment.GetCommandLineArgs();
            if (args.Length >= 2)
            {
                LoadArchive(args[1]);
            }
        }

        private void TabControl1_SelectedIndexChanged(object sender, EventArgs e)
        {
            // Show the seek bar only on the Media tab (tabPage3)
            if (tabControl1.SelectedTab == tabPage3)
            {
                seekBar.Visible = true;
            }
            else
            {
                seekBar.Visible = false;
            }
        }

        // Event handler for the seek bar's Scroll event
        private void SeekBar_Scroll(object sender, EventArgs e)
        {
            if (videoView1.MediaPlayer?.Media != null)
            {
                long duration = videoView1.MediaPlayer.Media.Duration;
                if (duration > 0)
                {
                    // Calculate newTime based on SeekBar position
                    long newTime = (long)((seekBar.Value / (double)seekBar.Maximum) * duration);
                    newTime = Math.Min(newTime, duration - 1); // Ensure newTime does not exceed duration

                    // Update the label3 based on the new time, independent of playback state
                    SetMediaTimeLabel(duration, newTime);

                    // Seek the video. If you want to seek immediately when scrolling, uncomment the line below.
                    videoView1.MediaPlayer.Time = newTime;
                }
            }
        }

        private void videoView1_MediaPlayer_TimeChanged(object sender, MediaPlayerTimeChangedEventArgs e)
        {
            Task.Run(async () =>
            {
                if (videoView1.MediaPlayer?.Media != null)
                {
                    long duration = videoView1.MediaPlayer.Media.Duration;

                    // Retry fetching duration if it seems invalid
                    if (duration <= 0)
                    {
                        await Task.Delay(500);
                        duration = videoView1.MediaPlayer.Media.Duration;
                    }

                    if (duration > 0)
                    {
                        int progress = (int)((e.Time / (double)duration) * seekBar.Maximum);
                        progress = Math.Min(progress, seekBar.Maximum);

                        seekBar.PerformSafely(() => seekBar.Value = progress);
                        SetMediaTimeLabel(duration, e.Time);
                    }
                }
            });
        }

        // Reset the seek bar when a new video is loaded
        private void ResetPreviewFields()
        {
            pictureBox1.Image = null;
            textBox2.Text = String.Empty;
            if (_memoryStreamVlc != null)
            {
                _memoryStreamVlc.Dispose();
                _memoryStreamVlc = null;
            }
            if (_streamMediaInputVlc != null)
            {
                _streamMediaInputVlc.Dispose();
                _streamMediaInputVlc = null;
            }
            if (_mediaVlc != null)
            {
                _mediaVlc.Dispose();
                _mediaVlc = null;
            }
            if (videoView1.MediaPlayer is { IsPlaying: true })
            {
                videoView1.MediaPlayer.Play(null!);
            }
            SetMediaTimeLabel(0, 0);

            // Reset the seek bar
            seekBar.Value = 0;
        }

        private void LoadTexts()
        {
            Text = GetText("Explorer_title");
            toolStripTextBox1.Text = GetText("Language");
            button1.Text = GetText("Load_file");
            button2.Text = GetText("Export_checked");
            statusBar1.Text = GetText("Ready");
            button3.Text = GetText("Cancel_operation");
            tabPage0.Text = GetText("None");
            label2.Text = GetText("Usage_instructions_new");
            tabPage1.Text = GetText("Image");
            tabPage2.Text = GetText("Text");
            tabPage3.Text = GetText("Media");
            button4.Text = GetText("Pause");
            button5.Text = GetText("Create_new_archive");
            label4.Text = GetText("File_list");
            button6.Text = GetText("Remove_checked");
            button7.Text = GetText("Save_archive");
            button8.Text = GetText("Search_next");
            label5.Text = GetText("Search");
            optionsToolStripMenuItem.Text = GetText("Options");
            associateRPARPIExtensionsToolStripMenuItem.Text = GetText("File_association");
            aboutToolStripMenuItem.Text = GetText("About");

            GenerateArchiveInfo();
        }

        internal static string GetText(string name)
        {
            if (Lang.GetObject(settings.GetLang().Abbrev + "_" + name) != null)
            {
                return Lang.GetObject(settings.GetLang().Abbrev + "_" + name)?.ToString();
            }

            return " {!!! MISSING TRANSLATION !!!} ";
        }

        private void ExportFiles(List<string> exportFilesList, FolderBrowserDialog folderBrowserDialog)
        {
            int counter = 0;
            int jobSize = exportFilesList.Count;
            foreach (string file in exportFilesList)
            {
                counter++;
                int pctProcessed = (int)Math.Ceiling((double)counter / jobSize * 100);
                label1.PerformSafely(() => label1.Text = $@"{counter} / {jobSize}");
                progressBar1.PerformSafely(() => progressBar1.Value = pctProcessed);

                statusBar1.PerformSafely(() => statusBar1.Text = GetText("Exporting_file") + file);

                _rpaParser.Extract(file, folderBrowserDialog.SelectedPath);

                if (!_operationEnabled)
                {
                    break;
                }
            }

            button1.PerformSafely(() => button1.Enabled = true);
            button2.PerformSafely(() => button2.Enabled = true);
            button3.PerformSafely(() => button3.Enabled = false);
            progressBar1.PerformSafely(() => progressBar1.Value = 0);
            label1.PerformSafely(() => label1.Text = "");
            statusBar1.PerformSafely(() => statusBar1.Text = GetText("Ready"));

            _operationEnabled = true;
        }

        private void CreateNewArchive()
        {
            if (CheckIfChanged(GetText("Archive_modified_new")))
            {
                return;
            }

            _expandedList.Clear();
            _rpaParser = new RpaParser();

            GenerateTreeView();

            _switchTabs = true;
            tabControl1.SelectedTab = tabPage0;
            _switchTabs = false;
            label2.Text = GetText("Usage_instructions_loaded");

            ResetPreviewFields();

            treeView1.SelectedNode = null;

            button2.Enabled = true;
            button6.Enabled = true;
            button7.Enabled = true;

            statusBar1.Text = GetText("Ready");

            _archiveChanged = true;
        }

        private void SaveArchive()
        {
            if (_rpaParser.Index.Count == 0)
            {
                MessageBox.Show(GetText("Empty_archive_save"), GetText("Empty_archive"), MessageBoxButtons.OK, MessageBoxIcon.Information);
                return;
            }

            statusBar1.Text = GetText("Saving_archive");

            string initPath = _appInfo?.DirectoryName;
            if (_rpaParser.ArchiveInfo?.DirectoryName != null)
            {
                initPath = _rpaParser.ArchiveInfo.DirectoryName;
            }

            SaveFileDialog saveFileDialog = new SaveFileDialog();
            saveFileDialog.Title = GetText("Save_RenPy_Archive");
            saveFileDialog.Filter = GetText("RPA_RPI_files") + @" (*.rpa,*.rpi)|*.rpa;*.rpi";
            saveFileDialog.InitialDirectory = initPath;
            saveFileDialog.CheckFileExists = false;
            saveFileDialog.CheckPathExists = true;

            ArchiveSave options = new ArchiveSave(_rpaParser);
            options.ShowDialog();

            if (!_rpaParser.OptionsConfirmed)
            {
                return;
            }

            if (saveFileDialog.ShowDialog() == DialogResult.OK)
            {
                _rpaParserBak = _rpaParser;
                try
                {
                    string saveName = _rpaParser.SaveArchive(saveFileDialog.FileName);
                    LoadArchive(saveName, true);
                }
                catch (Exception ex)
                {
                    _rpaParser = _rpaParserBak;
                    MessageBox.Show(
                        string.Format(GetText("Save_failed_reason"), ex.Message),
                        GetText("Save_failed"), MessageBoxButtons.OK, MessageBoxIcon.Error);
                }

                GenerateTreeView();

                statusBar1.Text = GetText("Ready");
            }
        }

        private void GenerateArchiveInfo()
        {
            string archiveInfo = String.Empty;

            if (_archiveLoaded)
            {
                string selectedPath = String.Empty;
                foreach (TreeNode node in treeView1.Nodes.All())
                {
                    if (node.IsSelected)
                    {
                        selectedPath = NormalizeTreePath(node.FullPath);
                    }
                }

                long selectedSize = -1;
                int unsavedCount = 0;
                foreach (KeyValuePair<string, RpaParser.ArchiveIndex> kvp in _rpaParser.Index)
                {
                    if (!kvp.Value.InArchive)
                    {
                        unsavedCount++;
                    }

                    if (selectedPath == kvp.Key)
                    {
                        selectedSize = kvp.Value.Length;
                    }
                }

                if (_indexPathSize.ContainsKey(selectedPath))
                {
                    selectedSize = _indexPathSize[selectedPath];
                }

                if (!_rpaParser.CheckVersion(_rpaParser.ArchiveVersion, RpaParser.Version.Unknown))
                {
                    archiveInfo += GetText("Archive_version") + _rpaParser.ArchiveVersion + Environment.NewLine;
                    archiveInfo += GetText("Archive_file_location") + _rpaParser.ArchiveInfo.FullName +
                                   Environment.NewLine;
                    archiveInfo += GetText("Archive_file_size") + PrettySize.Format(_rpaParser.ArchiveInfo.Length) +
                                   Environment.NewLine;
                    if (_rpaParser.IndexInfo != null)
                    {
                        archiveInfo += GetText("Index_file_location") + _rpaParser.IndexInfo.FullName +
                                       Environment.NewLine;
                        archiveInfo += GetText("Index_file_size") + PrettySize.Format(_rpaParser.IndexInfo.Length) +
                                       Environment.NewLine;
                    }
                }

                archiveInfo += GetText("Files_count") + _rpaParser.Index.Count + Environment.NewLine;
                archiveInfo += GetText("Unsaved_files_count") + unsavedCount + Environment.NewLine;

                if (selectedSize != -1)
                {
                    if (selectedPath == String.Empty)
                    {
                        selectedPath = "/";
                    }
                    archiveInfo += GetText("Selected_file_path") + selectedPath +
                                   Environment.NewLine;
                    archiveInfo += GetText("Selected_file_size") + PrettySize.Format(selectedSize) +
                                   Environment.NewLine;
                }
            }

            textBox1.Text = archiveInfo.Trim();
        }

        private void LoadArchive(string openFile, bool ignoreChanges = false)
        {
            if (!ignoreChanges)
            {
                if (CheckIfChanged(GetText("Archive_modified_load")))
                {
                    return;
                }
            }

            using OpenFileDialog openFileDialog = new OpenFileDialog();
            openFileDialog.Title = GetText("Load_RenPy_Archive");
            openFileDialog.Filter = GetText("RPA_RPI_files") + @" (*.rpa,*.rpi)|*.rpa;*.rpi";

            string archivePath = settings.GetArchive();
            if (!string.IsNullOrEmpty(archivePath))
            {
                FileInfo fi = new FileInfo(archivePath);
                openFileDialog.InitialDirectory = fi.DirectoryName;
            }

            DialogResult dialogResult = DialogResult.None;
            if (string.IsNullOrEmpty(openFile))
            {
                dialogResult = openFileDialog.ShowDialog();
            }
            else
            {
                if (openFile.EndsWith(".rpa") || openFile.EndsWith(".rpi"))
                {
                    dialogResult = DialogResult.OK;
                    openFileDialog.FileName = openFile;
                }
                else
                {
                    MessageBox.Show(
                        string.Format(GetText("Load_failed_reason"), GetText("Not_valid_archive_file")),
                        GetText("Load_failed"), MessageBoxButtons.OK, MessageBoxIcon.Error);
                    statusBar1.Text = GetText("Ready");
                    return;
                }
            }

            if (dialogResult == DialogResult.OK)
            {
                if (openFileDialog.CheckFileExists)
                {
                    settings.SetArchive(openFileDialog.FileName);
                    statusBar1.Text = GetText("Loading_file") + openFileDialog.FileName;

                    try
                    {
                        _expandedList.Clear();
                        _rpaParser = new RpaParser();

                        string appFolder = Path.GetDirectoryName(Application.ExecutablePath);
                        _rpaParser.UnrpycLocation = Path.Combine(appFolder, "unrpyc.exe");

                        _rpaParser.LoadArchive(openFileDialog.FileName);
                    }
                    catch (Exception ex)
                    {
                        MessageBox.Show(
                            string.Format(GetText("Load_failed_reason"), ex.Message),
                            GetText("Load_failed"), MessageBoxButtons.OK, MessageBoxIcon.Error);
                        statusBar1.Text = GetText("Ready");
                        return;
                    }

                    GenerateTreeView();

                    _switchTabs = true;
                    tabControl1.SelectedTab = tabPage0;
                    _switchTabs = false;
                    label2.Text = GetText("Usage_instructions_loaded");

                    ResetPreviewFields();

                    treeView1.SelectedNode = null;

                    button2.Enabled = true;
                    button6.Enabled = true;
                    button7.Enabled = true;

                    statusBar1.Text = GetText("Ready");
                }

                _archiveChanged = false;
            }
        }

        private void AddFilesToArchive(string[] pathList)
        {
            // Get the selected tree node (if any)
            string selectedPath = "/";
            if (treeView1.SelectedNode != null)
            {
                selectedPath = NormalizeTreePath(treeView1.SelectedNode.FullPath);
            }

            // Prompt user for target folder with empty default value
            string targetFolder = Prompt.ShowDialog("Enter target folder:", "Insert Files", targetFoldername);

            // Normalize input
            targetFolder = string.IsNullOrWhiteSpace(targetFolder) ? "/" : NormalizeTreePath(targetFolder);

            _fileListBackup.Clear();
            _fileListBackup = _rpaParser.DeepCopyIndex(_rpaParser.Index);
            _cancelAdd = false;

            foreach (string path in pathList)
            {
                if (Directory.Exists(path))
                {
                    bool hasFiles = Directory.GetFiles(path, "*", SearchOption.AllDirectories).Length > 0;
                    if (hasFiles)
                    {
                        AddPathToIndex(path, targetFolder);
                    }
                }
                else if (File.Exists(path))
                {
                    AddPathToIndex(path, targetFolder);
                }
            }

            if (!_cancelAdd)
            {
                _rpaParser.Index = _rpaParser.DeepCopyIndex(_fileListBackup);
            }

            _fileListBackup.Clear();
            GenerateTreeView();
        }

        private void GenerateTreeView()
        {
            _indexPathSize.Clear();
            treeView1.Nodes.Clear();
            TreeNode root = new TreeNode();
            TreeNode node;
            root.Name = "";
            root.Text = @"/";
            root.BackColor = Color.SandyBrown;
            root.ImageIndex = 0;
            treeView1.Nodes.Add(root);
            _indexPathSize.Add("", 0);
            string pathBuild;

            // Folders first
            foreach (KeyValuePair<string, RpaParser.ArchiveIndex> kvp in _rpaParser.Index)
            {
                node = root;
                pathBuild = String.Empty;
                foreach (string pathBits in kvp.Key.Split('/'))
                {
                    if (pathBuild == String.Empty)
                    {
                        pathBuild = pathBits;
                    }
                    else
                    {
                        pathBuild += "/" + pathBits;
                    }

                    if (node.Nodes.ContainsKey(pathBits))
                    {
                        node = node.Nodes[pathBits];
                    }
                    else
                    {
                        if (pathBuild != kvp.Key)
                        {
                            node = node.Nodes.Add(pathBits, pathBits);
                        }
                    }
                }
            }

            // Files second
            foreach (KeyValuePair<string, RpaParser.ArchiveIndex> kvp in _rpaParser.Index)
            {
                node = root;
                pathBuild = String.Empty;
                foreach (string pathBits in kvp.Key.Split('/'))
                {
                    if (pathBuild == String.Empty)
                    {
                        pathBuild = pathBits;
                    }
                    else
                    {
                        pathBuild += "/" + pathBits;
                    }

                    node = node.Nodes.ContainsKey(pathBits) ? node.Nodes[pathBits] : node.Nodes.Add(pathBits, pathBits);

                    if (pathBuild != kvp.Key)
                    {
                        if (!_indexPathSize.ContainsKey(pathBuild))
                        {
                            _indexPathSize.Add(pathBuild, 0);
                        }

                        if (_rpaParser.Index.ContainsKey(kvp.Key))
                        {
                            _indexPathSize[pathBuild] += _rpaParser.Index[kvp.Key].Length;
                        }
                    }
                    else
                    {
                        _indexPathSize[""] += _rpaParser.Index[kvp.Key].Length;
                    }
                }
            }

            foreach (TreeNode nodeVisuals in treeView1.Nodes.All())
            {
                string nodeName = NormalizeTreePath(nodeVisuals.FullPath);

                if (nodeName != String.Empty)
                {
                    if (nodeVisuals.Nodes.Count > 0)
                    {
                        nodeVisuals.BackColor = Color.SandyBrown;
                        nodeVisuals.ImageIndex = 0;
                    }
                    else
                    {
                        nodeVisuals.BackColor = Color.Transparent;
                        nodeVisuals.ImageIndex = 1;
                    }
                }

                if (_rpaParser.Index.ContainsKey(nodeName))
                {
                    if (!_rpaParser.Index[nodeName].InArchive)
                    {
                        nodeVisuals.ForeColor = Color.Green;
                        nodeVisuals.ImageIndex = 2;

                        MarkChanged(nodeVisuals);
                    }
                }

                if (_expandedList.Contains(nodeVisuals.FullPath))
                {
                    nodeVisuals.Expand();
                }
            }

            root.Expand();
            _archiveLoaded = true;

            GenerateArchiveInfo();
        }

        private void MarkChanged(TreeNode node)
        {
            if (node.Parent != null)
            {
                node.Parent.ForeColor = Color.Green;
                MarkChanged(node.Parent);
            }
        }

        private void Search(TextBox tb, string pattern)
        {
            int index;

            tb.Focus();

            if ((index = tb.Text.IndexOf(pattern, _searchStartIndex, StringComparison.Ordinal)) != -1)
            {
                tb.Select(index, pattern.Length);
                _searchStartIndex = tb.SelectionStart + tb.SelectionLength;
            }
            else
            {
                _searchStartIndex = 0;
                if ((index = tb.Text.IndexOf(pattern, _searchStartIndex, StringComparison.Ordinal)) != -1)
                {
                    tb.Select(index, pattern.Length);
                    _searchStartIndex = tb.SelectionStart + tb.SelectionLength;
                }
                else
                {
                    tb.Select(0, 0);
                }
            }

            tb.ScrollToCaret();
        }

        private string NormalizeTreePath(string path)
        {
            return Regex.Replace(path, "^/+", "");
        }

        private async void PreviewSelectedItem()
        {
            TreeNode selectedNode = new TreeNode();
            bool unsupportedFile = true;
            pictureBox1.Image = null;

            foreach (TreeNode node in treeView1.Nodes.All())
            {
                // Reset fields
                ResetPreviewFields();

                if (node.IsSelected)
                {
                    selectedNode = node;
                }

                if (node.IsSelected && _rpaParser.Index.ContainsKey(NormalizeTreePath(node.FullPath)))
                {
                    KeyValuePair<string, object> data = new KeyValuePair<string, object>();
                    try
                    {
                        data = await Task.Run(() => _rpaParser.GetPreview(NormalizeTreePath(node.FullPath)));

                        if (data.Key == RpaParser.PreviewTypes.Image)
                        {
                            pictureBox1.Image = (Image)data.Value;
                            _switchTabs = true;
                            tabControl1.SelectedTab = tabPage1;
                            _switchTabs = false;
                            unsupportedFile = false;
                        }
                        else if (data.Key == RpaParser.PreviewTypes.Text)
                        {
                            _searchStartIndex = 0;
                            textBox2.Text = (string)data.Value;
                            _switchTabs = true;
                            tabControl1.SelectedTab = tabPage2;
                            _switchTabs = false;
                            unsupportedFile = false;
                        }
                        else if (data.Key == RpaParser.PreviewTypes.Audio || data.Key == RpaParser.PreviewTypes.Video)
                        {
                            _memoryStreamVlc = new MemoryStream((byte[])data.Value);
                            _streamMediaInputVlc = new StreamMediaInput(_memoryStreamVlc);
                            _mediaVlc = new Media(_libVlc, _streamMediaInputVlc);

                            // Ensure the media is stopped
                            await Task.Run(() =>
                            {
                                if (videoView1.MediaPlayer != null)
                                {
                                    videoView1.MediaPlayer.Stop();
                                }
                            });

                            // Playback the new media
                            videoView1.MediaPlayer.Play(_mediaVlc);
                            SetMediaTimeLabel(_mediaVlc.Duration, 0);
                            videoView1.BackgroundImage = data.Key == RpaParser.PreviewTypes.Audio ? Resources.videoView1_BackgroundImage : null;
                            _switchTabs = true;
                            tabControl1.SelectedTab = tabPage3;
                            _switchTabs = false;
                            unsupportedFile = false;

                            // Check playback state to update button text
                            button4.Text = "Pause"; // Assuming you want to start playing the new video.
                        }
                    }
                    catch (Exception ex)
                    {
                        MessageBox.Show(string.Format(GetText("Preview_failed_reason"), ex.Message), GetText("Preview_failed"), MessageBoxButtons.OK, MessageBoxIcon.Error);
                    }

                    break;
                }
            }

            if (unsupportedFile)
            {
                _switchTabs = true;
                tabControl1.SelectedTab = tabPage0;
                _switchTabs = false;
                label2.Text = GetText("Preview_is_not_supported");
            }

            treeView1.SelectedNode = selectedNode;
            treeView1.SelectedNode.SelectedImageIndex = selectedNode.ImageIndex;
            treeView1.SelectedNode.EnsureVisible();
            treeView1.Focus();
        }

        private void CheckAllChildNodes(TreeNode node, bool isChecked)
        {
            if (node.Nodes.Count == 0)
            {
                node.Checked = isChecked;
            }
            else
            {
                foreach (TreeNode childNode in node.Nodes)
                {
                    CheckAllChildNodes(childNode, isChecked);
                }
                node.Checked = isChecked;
            }
        }

        private void ParentCheckControl(TreeNode parentNode)
        {
            foreach (TreeNode node in parentNode.Nodes.All())
            {
                if (!node.Checked)
                {
                    parentNode.Checked = false;
                    break;
                }
                parentNode.Checked = true;
            }
            if (parentNode.Parent != null)
            {
                ParentCheckControl(parentNode.Parent);
            }
        }

        private void PlayPauseMedia()
        {
            if (videoView1.MediaPlayer is { IsPlaying: true })
            {
                videoView1.MediaPlayer?.Pause();
                button4.Text = GetText("Play");
            }
            else
            {
                videoView1.MediaPlayer?.Play();
                button4.Text = GetText("Pause");
            }
        }

        private void SetMediaTimeLabel(long totalTimeMillies, long currentTimeMillies)
        {
            TimeSpan totalTime = TimeSpan.FromMilliseconds(totalTimeMillies);
            TimeSpan currentTime = TimeSpan.FromMilliseconds(currentTimeMillies);
            TimeSpan remainingTime = totalTime - currentTime;

            string timeFormat = @"hh\:mm\:ss";
            string timeText = $"{currentTime.ToString(timeFormat)} / {totalTime.ToString(timeFormat)} (-{remainingTime.ToString(timeFormat)})";

            label3.PerformSafely(() => label3.Text = timeText);
        }

        private bool CheckIfChanged(string message)
        {
            if (message != String.Empty && _archiveChanged)
            {
                if (MessageBox.Show(message, GetText("Archive_modified"), MessageBoxButtons.YesNo, MessageBoxIcon.Warning) == DialogResult.No)
                {
                    return true;
                }

                return false;
            }

            return _archiveChanged;
        }

        private void AddPathToIndex(string path, string targetFolder)
        {
            _archiveChanged = true;
            RpaParser.ArchiveIndex index = new RpaParser.ArchiveIndex
            {
                InArchive = false
            };

            if (Directory.Exists(path))
            {
                foreach (string file in Directory.GetFiles(path, "*", SearchOption.AllDirectories))
                {
                    AddPathToIndex(file, targetFolder);
                }
                return;
            }

            if (File.Exists(path) && !_cancelAdd)
            {
                string fileName = Path.GetFileName(path);
                string archivePath = targetFolder == "/" ? fileName : $"{targetFolder}/{fileName}";

                index.FullPath = path.Replace(@"\", "/");
                index.TreePath = archivePath;
                index.ParentPath = Path.GetDirectoryName(archivePath);
                index.Length = new FileInfo(path).Length;
                index.InArchive = false;

                if (_fileListBackup.ContainsKey(index.TreePath))
                {
                    _fileListBackup.Remove(index.TreePath);
                }

                _fileListBackup.Add(index.TreePath, index);
            }
        }

        private void button1_Click(object sender, EventArgs e)
        {
            LoadArchive(String.Empty);
        }

        private void button2_Click(object sender, EventArgs e)
        {
            using FolderBrowserDialog folderBrowserDialog = new FolderBrowserDialog();
            List<string> exportFilesList = new List<string>();
            foreach (TreeNode node in treeView1.Nodes.All())
            {
                if (node.Checked && _rpaParser.Index.ContainsKey(NormalizeTreePath(node.FullPath)))
                {
                    exportFilesList.Add(NormalizeTreePath(node.FullPath));
                }
            }

            if (exportFilesList.Count == 0)
            {
                return;
            }

            folderBrowserDialog.SelectedPath = _rpaParser.ArchiveInfo.DirectoryName;
            if (folderBrowserDialog.ShowDialog() == DialogResult.OK)
            {
                button1.Enabled = false;
                button2.Enabled = false;
                button3.Enabled = true;
                progressBar1.Value = 0;
                label1.PerformSafely(() => label1.Text = "");

                _operation = new Thread(() => ExportFiles(exportFilesList, folderBrowserDialog));
                _operation.Start();
            }
        }

        public class FileAssociation
        {
            public string Extension { get; set; }
            public string ProgId { get; set; }
            public string FileTypeDescription { get; set; }
            public string ExecutableFilePath { get; set; }
        }

        public class FileAssociations
        {
            // needed so that Explorer windows get refreshed after the registry is updated
            [DllImport("Shell32.dll")]
            private static extern int SHChangeNotify(int eventId, int flags, IntPtr item1, IntPtr item2);

            private const int SHCNE_ASSOCCHANGED = 0x8000000;
            private const int SHCNF_FLUSH = 0x1000;


            public static void EnsureAssociationsSet(params FileAssociation[] associations)
            {
                bool madeChanges = false;
                foreach (FileAssociation association in associations)
                {
                    madeChanges |= SetAssociation(
                        association.Extension,
                        association.ProgId,
                        association.FileTypeDescription,
                        association.ExecutableFilePath);
                }

                if (madeChanges)
                {
                    SHChangeNotify(SHCNE_ASSOCCHANGED, SHCNF_FLUSH, IntPtr.Zero, IntPtr.Zero);
                }
            }

            private static bool SetAssociation(string extension, string progId, string fileTypeDescription, string applicationFilePath)
            {
                bool madeChanges = false;
                madeChanges |= SetKeyDefaultValue(@"Software\Classes\" + extension, progId);
                madeChanges |= SetKeyDefaultValue(@"Software\Classes\" + progId, fileTypeDescription);
                madeChanges |= SetKeyDefaultValue($@"Software\Classes\{progId}\shell\open\command", "\"" + applicationFilePath + "\" \"%1\"");
                return madeChanges;
            }

            private static bool SetKeyDefaultValue(string keyPath, string value)
            {
                using var key = Registry.CurrentUser.CreateSubKey(keyPath);
                if (key == null || key.GetValue(null) as string == value) return false;
                key.SetValue(null, value);
                return true;
            }
        }

        private void button3_Click(object sender, EventArgs e)
        {
            _operationEnabled = false;
        }

        private void treeView1_AfterSelect(object sender, EventArgs e)
        {
            PreviewSelectedItem();
            GenerateArchiveInfo();
        }

        private void treeView1_AfterCheck(object sender, TreeViewEventArgs e)
        {
            if (e.Action != TreeViewAction.Unknown)
            {
                Task.Run(async () =>
                {
                    await Task.Delay(50); // Prevent rapid selection from missing updates
                    Application.DoEvents(); // Force UI refresh to process all pending events

                    // Ensure all children are updated
                    if (e.Node.Nodes.Count > 0)
                    {
                        CheckAllChildNodes(e.Node, e.Node.Checked);
                    }

                    // Ensure parents reflect the correct state
                    if (e.Node.Parent != null)
                    {
                        ParentCheckControl(e.Node.Parent);
                    }
                });
            }
        }

        private void tabControl1_Selecting(object sender, TabControlCancelEventArgs e)
        {
            if (!_switchTabs)
            {
                e.Cancel = true;
            }
            _switchTabs = false;
        }

        private void button4_Click(object sender, EventArgs e)
        {
            PlayPauseMedia();
        }

        private void trackBar1_Scroll(object sender, EventArgs e)
        {
            if (videoView1.MediaPlayer?.Media != null)
            {
                videoView1.MediaPlayer.Volume = trackBar1.Value;
            }
        }

        private void RpaExplorer_FormClosing(object sender, FormClosingEventArgs e)
        {
            if (CheckIfChanged(GetText("Archive_modified_close")))
            {
                e.Cancel = true;
            }
        }

        private void button5_Click(object sender, EventArgs e)
        {
            CreateNewArchive();
        }

        private string targetFoldername; // Class-level variable to store the folder name

        private void treeView1_DragDrop(object sender, DragEventArgs e)
        {
            if (e.Data.GetDataPresent(DataFormats.FileDrop))
            {
                string[] droppedFiles = (string[])e.Data.GetData(DataFormats.FileDrop);

                // Initialize the targetFoldername variable
                targetFoldername = string.Empty; // Reset before each drop

                // Check if the first dropped item is a directory
                if (Directory.Exists(droppedFiles[0]))
                {
                    // If it's a folder, set targetFoldername to the name of that folder
                    targetFoldername = Path.GetFileName(droppedFiles[0]);
                }

                if (e.Data.GetDataPresent(DataFormats.FileDrop))
                {
                    AddFilesToArchive((string[])e.Data.GetData(DataFormats.FileDrop));
                }
            }
        }

        private void treeView1_DragEnter(object sender, DragEventArgs e)
        {
            if (e.Data.GetDataPresent(DataFormats.FileDrop) && _archiveLoaded)
            {
                e.Effect = DragDropEffects.Copy;
                return;
            }
            e.Effect = DragDropEffects.None;
        }

        private void tabControl1_DragEnter(object sender, DragEventArgs e)
        {
            if (e.Data.GetDataPresent(DataFormats.FileDrop))
            {
                e.Effect = DragDropEffects.Copy;
                return;
            }
            e.Effect = DragDropEffects.None;
        }

        private void tabControl1_DragDrop(object sender, DragEventArgs e)
        {
            if (e.Data.GetDataPresent(DataFormats.FileDrop))
            {
                LoadArchive(((string[])e.Data.GetData(DataFormats.FileDrop))[0]);
            }
        }

        private void button6_Click(object sender, EventArgs e)
        {
            bool changed = false;
            foreach (TreeNode node in treeView1.Nodes.All())
            {
                if (node.Checked && _rpaParser.Index.ContainsKey(NormalizeTreePath(node.FullPath)))
                {
                    _rpaParser.Index.Remove(NormalizeTreePath(node.FullPath));
                    changed = true;
                }
            }

            if (changed)
            {
                _archiveChanged = true;
                GenerateTreeView();
            }
        }

        private void button7_Click(object sender, EventArgs e)
        {
            SaveArchive();
        }

        private void treeView1_BeforeCollapse(object sender, TreeViewCancelEventArgs e)
        {
            if (_expandedList.Contains(e.Node.FullPath))
            {
                _expandedList.Remove(e.Node.FullPath);
            }
        }

        private void treeView1_BeforeExpand(object sender, TreeViewCancelEventArgs e)
        {
            _expandedList.Add(e.Node.FullPath);
        }

        private void toolStripComboBox1_SelectedIndexChanged(object sender, EventArgs e)
        {
            settings.SetLang(toolStripComboBox1.SelectedItem.ToString());
            LoadTexts();
        }

        private void button8_Click(object sender, EventArgs e)
        {
            if (textBox3.Text.Trim() != String.Empty)
            {
                Search(textBox2, textBox3.Text.Trim());
            }
        }

        private void associateRPARPIExtensionsToolStripMenuItem_Click(object sender, EventArgs e)
        {
            ProcessModule processModule = Process.GetCurrentProcess().MainModule;
            if (processModule != null)
            {
                string filePath = processModule.FileName;
                FileAssociations.EnsureAssociationsSet(
                    new FileAssociation
                    {
                        Extension = ".rpi",
                        ProgId = "RPA Explorer",
                        FileTypeDescription = "RenPy Index File",
                        ExecutableFilePath = filePath
                    },
                    new FileAssociation
                    {
                        Extension = ".rpa",
                        ProgId = "RPA Explorer",
                        FileTypeDescription = "RenPy Archive File",
                        ExecutableFilePath = filePath
                    });
            }
        }

        private void aboutToolStripMenuItem_Click(object sender, EventArgs e)
        {
            new About().ShowDialog();
        }
    }

    public static class Prompt
    {
        public static string ShowDialog(string text, string caption, string defaultValue)
        {
            Form prompt = new Form
            {
                Width = 500,
                Height = 150,
                FormBorderStyle = FormBorderStyle.FixedDialog,
                Text = caption,
                StartPosition = FormStartPosition.CenterScreen,
                MaximizeBox = false,
                MinimizeBox = false,
                TopMost = true
            };
            Label textLabel = new Label { Left = 50, Top = 20, Text = text };
            TextBox textBox = new TextBox { Left = 50, Top = 50, Width = 400, Text = defaultValue };
            Button confirmation = new Button { Text = @"OK", Left = 350, Width = 101, Top = 70, DialogResult = DialogResult.OK };
            confirmation.Click += (sender, e) => { prompt.Close(); };
            prompt.Controls.Add(textBox);
            prompt.Controls.Add(confirmation);
            prompt.Controls.Add(textLabel);
            prompt.AcceptButton = confirmation;

            return prompt.ShowDialog() == DialogResult.OK ? textBox.Text : String.Empty;
        }
    }

    public static class CrossThreadExtensions
    {
        public static void PerformSafely(this Control target, Action action)
        {
            if (target.InvokeRequired)
            {
                target.Invoke(action);
            }
            else
            {
                action();
            }
        }

        public static void PerformSafely<T1>(this Control target, Action<T1> action, T1 parameter)
        {
            if (target.InvokeRequired)
            {
                target.Invoke(action, parameter);
            }
            else
            {
                action(parameter);
            }
        }

        public static void PerformSafely<T1, T2>(this Control target, Action<T1, T2> action, T1 p1, T2 p2)
        {
            if (target.InvokeRequired)
            {
                target.Invoke(action, p1, p2);
            }
            else
            {
                action(p1, p2);
            }
        }
    }


    public static class Extensions
    {
        public static IEnumerable<TreeNode> All(this TreeNodeCollection nodes)
        {
            foreach (TreeNode n in nodes)
            {
                yield return n;
                foreach (TreeNode child in n.Nodes.All())
                    yield return child;
            }
        }
    }
}