using System;
using System.Collections.Generic;
using System.IO;
using Sys = Cosmos.System;

namespace CMLeonOS
{
    public class Shell
    {
        private string prompt = "/";
        private List<string> commandHistory = new List<string>();
        private FileSystem fileSystem;
        private UserSystem userSystem;
        private bool fixMode;

        public Shell()
        {
            fileSystem = new FileSystem();
            userSystem = new UserSystem();
            fixMode = Kernel.FixMode;
        }

        public void Run()
        {
            bool shouldExit = false;
            while (true)
            {
                // 显示当前文件夹路径作为提示符（彩色）
                string currentPath = fileSystem.CurrentDirectory;
                ConsoleColor originalColor = Console.ForegroundColor;
                Console.ForegroundColor = ConsoleColor.Cyan;
                Console.Write($"{currentPath} | /");
                Console.ForegroundColor = originalColor;
                var input = Console.ReadLine();
                
                // 检查是否为退出命令
                if (input != null && input.ToLower().Trim() == "exit")
                {
                    Console.WriteLine("Exiting system...");
                    shouldExit = true;
                    break;
                }
                
                commandHistory.Add(input);
                var parts = input.Split(' ', StringSplitOptions.RemoveEmptyEntries);
                if (parts.Length > 0)
                {
                    var command = parts[0].ToLower();
                    var args = parts.Length > 1 ? string.Join(" ", parts, 1, parts.Length - 1) : "";
                    ProcessCommand(command, args);
                }
                
                // 如果需要退出，返回到登录页面
                if (shouldExit)
                {
                    return;
                }
            }
        }

        public void ExecuteCommand(string commandLine)
        {
            var parts = commandLine.Split(' ', StringSplitOptions.RemoveEmptyEntries);
            if (parts.Length > 0)
            {
                var command = parts[0].ToLower();
                var args = parts.Length > 1 ? string.Join(" ", parts, 1, parts.Length - 1) : "";
                ProcessCommand(command, args);
            }
        }

        private void ProcessCommand(string command, string args)
        {
            switch (command)
            {
                case "echo":
                    ProcessEcho(args);
                    break;
                case "clear":
                case "cls":
                    Console.Clear();
                    break;
                case "restart":
                    Console.WriteLine("Restarting system...");
                    Sys.Power.Reboot();
                    break;
                case "shutdown":
                    Console.WriteLine("Shutting down system...");
                    Sys.Power.Shutdown();
                    break;
                case "help":
                    Console.WriteLine("Available commands:");
                    Console.WriteLine("  echo <text>      - Display text (supports \\n for newline)");
                    Console.WriteLine("  clear/cls        - Clear the screen");
                    Console.WriteLine("  restart          - Restart the system");
                    Console.WriteLine("  shutdown         - Shutdown the system");
                    Console.WriteLine("  time             - Display current time");
                    Console.WriteLine("  date             - Display current date");
                    Console.WriteLine("  prompt <text>    - Change command prompt");
                    Console.WriteLine("  calc <expr>      - Simple calculator");
                    Console.WriteLine("  history          - Show command history");
                    Console.WriteLine("  background <hex> - Change background color");
                    Console.WriteLine("  cuitest          - Test CUI framework");
                    Console.WriteLine("  edit <file>      - Simple code editor");
                    Console.WriteLine("  ls <dir>         - List files and directories");
                    Console.WriteLine("  cd <dir>         - Change directory");
                    Console.WriteLine("                     cd ..              - Go to parent directory");
                    Console.WriteLine("                     cd dir1/dir2/dir3 - Go to numbered directory");
                    Console.WriteLine("  pwd              - Show current directory");
                    Console.WriteLine("  mkdir <dir>      - Create directory");
                    Console.WriteLine("  rm <file>        - Remove file");
                    Console.WriteLine("                     Use -norisk to delete files in sys folder");
                    Console.WriteLine("  rmdir <dir>      - Remove directory");
                    Console.WriteLine("  cat <file>       - Display file content");
                    Console.WriteLine("  echo <text> > <file> - Write text to file");
                    Console.WriteLine("  head <file>      - Display first lines of file");
                    Console.WriteLine("                     Usage: head <file> <lines>");
                    Console.WriteLine("  tail <file>      - Display last lines of file");
                    Console.WriteLine("                     Usage: tail <file> <lines>");
                    Console.WriteLine("  wc <file>        - Count lines, words, characters");
                    Console.WriteLine("  cp <src> <dst>   - Copy file");
                    Console.WriteLine("  mv <src> <dst>   - Move/rename file");
                    Console.WriteLine("  touch <file>     - Create empty file");
                    Console.WriteLine("  find <name>      - Find file");
                    Console.WriteLine("  getdisk          - Show disk information");
                    Console.WriteLine("  user <cmd>       - User management");
                    Console.WriteLine("                     user add admin <username> <password>    - Add admin user");
                    Console.WriteLine("                     user add user <username> <password>     - Add regular user");
                    Console.WriteLine("                     user delete <username>                  - Delete user");
                    Console.WriteLine("                     user list                               - List all users");
                    Console.WriteLine("  cpass            - Change password");
                    Console.WriteLine("  beep             - Play beep sound");
                    Console.WriteLine("  branswe <filename> - Execute Branswe code file");
                    Console.WriteLine("  version          - Show OS version");
                    Console.WriteLine("  about            - Show about information");
                    Console.WriteLine("  help             - Show this help message");
                    Console.WriteLine();
                    Console.WriteLine("Startup Script: sys\\startup.cm");
                    Console.WriteLine("  Commands in this file will be executed on startup");
                    Console.WriteLine("  Each line should contain one command");
                    Console.WriteLine("  Lines starting with # are treated as comments");
                    break;
                case "time":
                    Console.WriteLine(DateTime.Now.ToString());
                    break;
                case "date":
                    Console.WriteLine(DateTime.Now.ToShortDateString());
                    break;
                case "prompt":
                    ChangePrompt(args);
                    break;
                case "calc":
                    Calculate(args);
                    break;
                case "history":
                    ShowHistory();
                    break;
                case "background":
                    ChangeBackground(args);
                    break;
                case "cuitest":
                    TestCUI();
                    break;
                case "edit":
                    EditFile(args);
                    break;
                case "ls":
                    fileSystem.ListFiles(args);
                    break;
                case "cd":
                    fileSystem.ChangeDirectory(args);
                    break;
                case "pwd":
                    Console.WriteLine(fileSystem.CurrentDirectory);
                    break;
                case "mkdir":
                    if (string.IsNullOrEmpty(args))
                    {
                        Console.WriteLine("Error: Please specify a directory name");
                    }
                    else
                    {
                        fileSystem.MakeDirectory(args);
                    }
                    break;
                case "rm":
                    if (string.IsNullOrEmpty(args))
                    {
                        Console.WriteLine("Error: Please specify a file name");
                    }
                    else
                    {
                        // 检查是否在sys文件夹中（修复模式下绕过检测）
                        bool isInSysFolder = (args.Contains(@"\system\") || args.Contains(@"/sys/")) && !fixMode;
                        
                        if (isInSysFolder)
                        {
                            // 检查是否有-norisk参数
                            string[] parts = args.Split(new char[] { ' ' }, StringSplitOptions.RemoveEmptyEntries);
                            bool hasNorisk = false;
                            string filePath = args;
                            
                            if (parts.Length > 1)
                            {
                                hasNorisk = Array.IndexOf(parts, "-norisk") >= 0;
                                filePath = parts[0];
                            }
                            
                            if (!hasNorisk)
                            {
                                Console.WriteLine("Error: Cannot delete files in sys folder without -norisk parameter");
                                Console.WriteLine("Usage: rm <file> -norisk");
                            }
                            else
                            {
                                fileSystem.DeleteFile(filePath);
                            }
                        }
                        else
                        {
                            fileSystem.DeleteFile(args);
                        }
                    }
                    break;
                case "rmdir":
                    if (string.IsNullOrEmpty(args))
                    {
                        Console.WriteLine("Error: Please specify a directory name");
                    }
                    else
                    {
                        // 检查是否在sys文件夹中（修复模式下绕过检测）
                        bool isInSysFolder = (args.Contains(@"\system\") || args.Contains(@"/sys/")) && !fixMode;
                        
                        if (isInSysFolder)
                        {
                            Console.WriteLine("Error: Cannot delete directories in sys folder");
                            Console.WriteLine("Use fix mode to bypass this restriction");
                        }
                        else
                        {
                            fileSystem.DeleteDirectory(args);
                        }
                    }
                    break;
                case "cat":
                    if (string.IsNullOrEmpty(args))
                    {
                        Console.WriteLine("Error: Please specify a file name");
                    }
                    else
                    {
                        Console.WriteLine(fileSystem.ReadFile(args));
                    }
                    break;
                case "version":
                    Console.WriteLine("CMLeonOS v1.0");
                    break;
                case "about":
                    Console.WriteLine("CMLeonOS Test Project");
                    Console.WriteLine("By LeonOS 2 Developement Team");
                    break;
                case "head":
                    HeadFile(args);
                    break;
                case "tail":
                    TailFile(args);
                    break;
                case "wc":
                    WordCount(args);
                    break;
                case "cp":
                    CopyFile(args);
                    break;
                case "mv":
                    MoveFile(args);
                    break;
                case "touch":
                    CreateEmptyFile(args);
                    break;
                case "find":
                    FindFile(args);
                    break;
                case "getdisk":
                    GetDiskInfo();
                    break;
                case "user":
                    ProcessUserCommand(args);
                    break;
                case "cpass":
                    userSystem.ChangePassword();
                    break;
                case "beep":
                    Console.Beep();
                    break;
                case "branswe":
                    ProcessBransweCommand(args);
                    break;
                default:
                    Console.WriteLine($"Unknown command: {command}");
                    break;
            }
        }

        private void ProcessEcho(string args)
        {
            // 支持基本的转义字符
            var processedArgs = args.Replace("\\n", "\n");
            Console.WriteLine(processedArgs);
        }

        private void ChangePrompt(string args)
        {
            if (!string.IsNullOrEmpty(args))
            {
                prompt = args;
            }
            else
            {
                prompt = "/";
            }
        }

        private void Calculate(string expression)
        {
            try
            {
                // 简单的计算器，只支持加减乘除
                var parts = expression.Split(' ');
                if (parts.Length == 3)
                {
                    double num1 = double.Parse(parts[0]);
                    string op = parts[1];
                    double num2 = double.Parse(parts[2]);
                    double result = 0;

                    switch (op)
                    {
                        case "+":
                            result = num1 + num2;
                            break;
                        case "-":
                            result = num1 - num2;
                            break;
                        case "*":
                            result = num1 * num2;
                            break;
                        case "/":
                            if (num2 != 0)
                            {
                                result = num1 / num2;
                            }
                            else
                            {
                                Console.WriteLine("Error: Division by zero");
                                return;
                            }
                            break;
                        default:
                            Console.WriteLine("Error: Invalid operator. Use +, -, *, /");
                            return;
                    }

                    Console.WriteLine($"Result: {result}");
                }
                else
                {
                    Console.WriteLine("Error: Invalid expression. Use format: calc <num> <op> <num>");
                }
            }
            catch (Exception ex)
            {
                Console.WriteLine($"Error: {ex.Message}");
            }
        }

        private void ShowHistory()
        {
            for (int i = 0; i < commandHistory.Count; i++)
            {
                Console.WriteLine($"{i + 1}: {commandHistory[i]}");
            }
        }

        private void ChangeBackground(string hexColor)
        {
            try
            {
                // 移除#前缀（如果有）
                hexColor = hexColor.TrimStart('#');

                // 解析16进制颜色代码
                if (hexColor.Length == 6)
                {
                    int r = Convert.ToInt32(hexColor.Substring(0, 2), 16);
                    int g = Convert.ToInt32(hexColor.Substring(2, 2), 16);
                    int b = Convert.ToInt32(hexColor.Substring(4, 2), 16);

                    // 简单的颜色映射，将RGB值映射到最接近的ConsoleColor
                    ConsoleColor color = GetClosestConsoleColor(r, g, b);
                    Console.BackgroundColor = color;
                    Console.Clear();
                    Console.WriteLine($"Background color changed to: #{hexColor}");
                }
                else
                {
                    Console.WriteLine("Error: Invalid hex color format. Use format: #RRGGBB or RRGGBB");
                }
            }
            catch (Exception ex)
            {
                Console.WriteLine($"Error changing background color: {ex.Message}");
            }
        }

        private ConsoleColor GetClosestConsoleColor(int r, int g, int b)
        {
            // 简单的颜色映射逻辑
            // 将RGB值映射到最接近的ConsoleColor
            ConsoleColor[] colors = new ConsoleColor[]
            {
                ConsoleColor.Black,
                ConsoleColor.DarkBlue,
                ConsoleColor.DarkGreen,
                ConsoleColor.DarkCyan,
                ConsoleColor.DarkRed,
                ConsoleColor.DarkMagenta,
                ConsoleColor.DarkYellow,
                ConsoleColor.Gray,
                ConsoleColor.DarkGray,
                ConsoleColor.Blue,
                ConsoleColor.Green,
                ConsoleColor.Cyan,
                ConsoleColor.Red,
                ConsoleColor.Magenta,
                ConsoleColor.Yellow,
                ConsoleColor.White
            };
            ConsoleColor closestColor = ConsoleColor.Black;
            double smallestDistance = double.MaxValue;

            foreach (ConsoleColor color in colors)
            {
                // 为每个ConsoleColor计算RGB值
                // 这里使用简单的映射，实际效果可能不是很准确
                int cr, cg, cb;
                GetRGBFromConsoleColor(color, out cr, out cg, out cb);

                // 计算欧几里得距离
                double distance = Math.Sqrt(Math.Pow(r - cr, 2) + Math.Pow(g - cg, 2) + Math.Pow(b - cb, 2));
                if (distance < smallestDistance)
                {
                    smallestDistance = distance;
                    closestColor = color;
                }
            }

            return closestColor;
        }

        private void GetRGBFromConsoleColor(ConsoleColor color, out int r, out int g, out int b)
        {
            // 简单的ConsoleColor到RGB的映射
            switch (color)
            {
                case ConsoleColor.Black:
                    r = 0; g = 0; b = 0; break;
                case ConsoleColor.DarkBlue:
                    r = 0; g = 0; b = 128; break;
                case ConsoleColor.DarkGreen:
                    r = 0; g = 128; b = 0; break;
                case ConsoleColor.DarkCyan:
                    r = 0; g = 128; b = 128; break;
                case ConsoleColor.DarkRed:
                    r = 128; g = 0; b = 0; break;
                case ConsoleColor.DarkMagenta:
                    r = 128; g = 0; b = 128; break;
                case ConsoleColor.DarkYellow:
                    r = 128; g = 128; b = 0; break;
                case ConsoleColor.Gray:
                    r = 192; g = 192; b = 192; break;
                case ConsoleColor.DarkGray:
                    r = 128; g = 128; b = 128; break;
                case ConsoleColor.Blue:
                    r = 0; g = 0; b = 255; break;
                case ConsoleColor.Green:
                    r = 0; g = 255; b = 0; break;
                case ConsoleColor.Cyan:
                    r = 0; g = 255; b = 255; break;
                case ConsoleColor.Red:
                    r = 255; g = 0; b = 0; break;
                case ConsoleColor.Magenta:
                    r = 255; g = 0; b = 255; break;
                case ConsoleColor.Yellow:
                    r = 255; g = 255; b = 0; break;
                case ConsoleColor.White:
                    r = 255; g = 255; b = 255; break;
                default:
                    r = 0; g = 0; b = 0; break;
            }
        }

        private void TestCUI()
        {
            // 创建CUI实例
            var cui = new CUI("CMLeonOS CUI Test");
            
            // 设置状态
            cui.SetStatus("Testing CUI...");
            
            // 渲染CUI界面（只渲染顶栏）
            cui.Render();
            
            // 显示测试消息
            Console.WriteLine();
            Console.WriteLine("CUI Framework Test");
            Console.WriteLine("-------------------");
            Console.WriteLine("Testing CUI functionality...");
            Console.WriteLine();
            
            // 测试不同类型的消息
            Console.ForegroundColor = ConsoleColor.Green;
            Console.WriteLine("Success: Success message test");
            Console.ResetColor();
            
            Console.ForegroundColor = ConsoleColor.Red;
            Console.WriteLine("Error: Error message test");
            Console.ResetColor();
            
            Console.WriteLine("Normal message test");
            Console.WriteLine();
            
            // 测试用户输入
            Console.Write("Enter your name: ");
            var input = Console.ReadLine();
            Console.WriteLine();
            Console.WriteLine($"Hello, {input}!");
            Console.WriteLine();
            
            // 渲染底栏
            cui.RenderBottomBar();
            
            // 等待用户按任意键返回
            Console.WriteLine();
            Console.WriteLine("Press any key to return to shell...");
            Console.ReadKey(true);
            
            // 重置控制台
            Console.Clear();
        }

        private void EditFile(string fileName)
        {
            if (string.IsNullOrEmpty(fileName))
            {
                Console.WriteLine("Error: Please specify a file name");
                return;
            }
            
            try
            {
                var editor = new Editor(fileName, fileSystem);
                editor.Run();
            }
            catch (Exception ex)
            {
                Console.WriteLine($"Error starting editor: {ex.Message}");
            }
        }

        private void HeadFile(string args)
        {
            if (string.IsNullOrEmpty(args))
            {
                Console.WriteLine("Error: Please specify a file name");
                return;
            }
            
            try
            {
                string[] parts = args.Split(new char[] { ' ' }, StringSplitOptions.RemoveEmptyEntries);
                string fileName = parts[0];
                int lineCount = 10; // 默认显示10行
                
                if (parts.Length > 1)
                {
                    if (int.TryParse(parts[1], out int count))
                    {
                        lineCount = count;
                    }
                }
                
                string content = fileSystem.ReadFile(fileName);
                if (string.IsNullOrEmpty(content))
                {
                    Console.WriteLine("File is empty");
                    return;
                }
                
                string[] lines = content.Split(new string[] { "\r\n", "\n" }, StringSplitOptions.None);
                int displayLines = Math.Min(lineCount, lines.Length);
                
                Console.WriteLine($"First {displayLines} lines of {fileName}:");
                Console.WriteLine("--------------------------------");
                
                for (int i = 0; i < displayLines; i++)
                {
                    Console.WriteLine($"{i + 1}: {lines[i]}");
                }
            }
            catch (Exception ex)
            {
                Console.WriteLine($"Error reading file: {ex.Message}");
            }
        }

        private void TailFile(string args)
        {
            if (string.IsNullOrEmpty(args))
            {
                Console.WriteLine("Error: Please specify a file name");
                return;
            }
            
            try
            {
                string[] parts = args.Split(new char[] { ' ' }, StringSplitOptions.RemoveEmptyEntries);
                string fileName = parts[0];
                int lineCount = 10; // 默认显示10行
                
                if (parts.Length > 1)
                {
                    if (int.TryParse(parts[1], out int count))
                    {
                        lineCount = count;
                    }
                }
                
                string content = fileSystem.ReadFile(fileName);
                if (string.IsNullOrEmpty(content))
                {
                    Console.WriteLine("File is empty");
                    return;
                }
                
                string[] lines = content.Split(new string[] { "\r\n", "\n" }, StringSplitOptions.None);
                int displayLines = Math.Min(lineCount, lines.Length);
                int startLine = Math.Max(0, lines.Length - displayLines);
                
                Console.WriteLine($"Last {displayLines} lines of {fileName}:");
                Console.WriteLine("--------------------------------");
                
                for (int i = startLine; i < lines.Length; i++)
                {
                    Console.WriteLine($"{i + 1}: {lines[i]}");
                }
            }
            catch (Exception ex)
            {
                Console.WriteLine($"Error reading file: {ex.Message}");
            }
        }

        private void WordCount(string args)
        {
            if (string.IsNullOrEmpty(args))
            {
                Console.WriteLine("Error: Please specify a file name");
                return;
            }
            
            try
            {
                string content = fileSystem.ReadFile(args);
                if (string.IsNullOrEmpty(content))
                {
                    Console.WriteLine("File is empty");
                    return;
                }
                
                string[] lines = content.Split(new string[] { "\r\n", "\n" }, StringSplitOptions.None);
                int lineCount = lines.Length;
                int wordCount = 0;
                int charCount = content.Length;
                
                foreach (string line in lines)
                {
                    if (!string.IsNullOrWhiteSpace(line))
                    {
                        string[] words = line.Split(new char[] { ' ', '\t' }, StringSplitOptions.RemoveEmptyEntries);
                        wordCount += words.Length;
                    }
                }
                
                Console.WriteLine($"Word count for {args}:");
                Console.WriteLine("--------------------------------");
                Console.WriteLine($"Lines: {lineCount}");
                Console.WriteLine($"Words: {wordCount}");
                Console.WriteLine($"Characters: {charCount}");
            }
            catch (Exception ex)
            {
                Console.WriteLine($"Error reading file: {ex.Message}");
            }
        }

        private void CopyFile(string args)
        {
            if (string.IsNullOrEmpty(args))
            {
                Console.WriteLine("Error: Please specify source and destination files");
                Console.WriteLine("Usage: cp <source> <destination>");
                return;
            }
            
            try
            {
                string[] parts = args.Split(new char[] { ' ' }, StringSplitOptions.RemoveEmptyEntries);
                if (parts.Length < 2)
                {
                    Console.WriteLine("Error: Please specify both source and destination");
                    Console.WriteLine("Usage: cp <source> <destination>");
                    return;
                }
                
                string sourceFile = parts[0];
                string destFile = parts[1];
                
                // 使用FileSystem读取源文件内容
                string content = fileSystem.ReadFile(sourceFile);
                if (content == null)
                {
                    Console.WriteLine($"Error: Source file '{sourceFile}' does not exist");
                    return;
                }
                
                // 使用FileSystem写入目标文件
                fileSystem.WriteFile(destFile, content);
                Console.WriteLine($"File copied successfully from '{sourceFile}' to '{destFile}'");
            }
            catch (Exception ex)
            {
                Console.WriteLine($"Error copying file: {ex.Message}");
            }
        }

        private void MoveFile(string args)
        {
            if (string.IsNullOrEmpty(args))
            {
                Console.WriteLine("Error: Please specify source and destination files");
                Console.WriteLine("Usage: mv <source> <destination>");
                return;
            }
            
            try
            {
                string[] parts = args.Split(new char[] { ' ' }, StringSplitOptions.RemoveEmptyEntries);
                if (parts.Length < 2)
                {
                    Console.WriteLine("Error: Please specify both source and destination");
                    Console.WriteLine("Usage: mv <source> <destination>");
                    return;
                }
                
                string sourceFile = parts[0];
                string destFile = parts[1];
                
                // 使用FileSystem读取源文件内容
                string content = fileSystem.ReadFile(sourceFile);
                if (content == null)
                {
                    Console.WriteLine($"Error: Source file '{sourceFile}' does not exist");
                    return;
                }
                
                // 使用FileSystem写入目标文件
                fileSystem.WriteFile(destFile, content);
                
                // 删除源文件
                fileSystem.DeleteFile(sourceFile);
                
                Console.WriteLine($"File moved/renamed successfully from '{sourceFile}' to '{destFile}'");
            }
            catch (Exception ex)
            {
                Console.WriteLine($"Error moving file: {ex.Message}");
            }
        }

        private void CreateEmptyFile(string args)
        {
            if (string.IsNullOrEmpty(args))
            {
                Console.WriteLine("Error: Please specify a file name");
                Console.WriteLine("Usage: touch <filename>");
                return;
            }
            
            try
            {
                // 使用FileSystem创建空文件
                fileSystem.WriteFile(args, "");
                Console.WriteLine($"Empty file '{args}' created successfully");
            }
            catch (Exception ex)
            {
                Console.WriteLine($"Error creating file: {ex.Message}");
            }
        }

        private void FindFile(string args)
        {
            if (string.IsNullOrEmpty(args))
            {
                Console.WriteLine("Error: Please specify a file name to search");
                Console.WriteLine("Usage: find <filename>");
                return;
            }
            
            try
            {
                // 使用FileSystem获取当前目录的文件列表
                var files = fileSystem.GetFileList(".");
                bool found = false;
                
                foreach (var file in files)
                {
                    // 检查文件名是否包含搜索字符串
                    if (file.ToLower().Contains(args.ToLower()))
                    {
                        Console.WriteLine($"Found: {file}");
                        found = true;
                    }
                }
                
                if (!found)
                {
                    Console.WriteLine($"No files found matching '{args}'");
                }
            }
            catch (Exception ex)
            {
                Console.WriteLine($"Error finding file: {ex.Message}");
            }
        }

        private void GetDiskInfo()
        {
            Console.WriteLine("====================================");
            Console.WriteLine("        Disk Information");
            Console.WriteLine("====================================");
            
            try
            {
                // 使用VFSManager获取所有磁盘
                var disks = Sys.FileSystem.VFS.VFSManager.GetDisks();
                
                if (disks == null || disks.Count == 0)
                {
                    Console.WriteLine("No disks found.");
                    return;
                }
                
                Console.WriteLine($"Total Disks: {disks.Count}");
            }
            catch (Exception ex)
            {
                Console.WriteLine($"Error getting disk info: {ex.Message}");
            }
        }

        private string FormatBytes(long bytes)
        {
            string[] units = { "B", "KB", "MB", "GB", "TB" };
            int unitIndex = 0;
            double size = bytes;
            
            while (size >= 1024 && unitIndex < units.Length - 1)
            {
                size /= 1024;
                unitIndex++;
            }
            
            return $"{size:F2} {units[unitIndex]}";
        }

        private void ProcessUserCommand(string args)
        {
            if (string.IsNullOrEmpty(args))
            {
                Console.WriteLine("Error: Please specify a user command");
                Console.WriteLine("Usage: user <add|delete> [args]");
                Console.WriteLine("  user add admin <username> <password>  - Add admin user");
                Console.WriteLine("  user add user <username> <password>      - Add regular user");
                Console.WriteLine("  user delete <username>                    - Delete user");
                Console.WriteLine("  user list                                    - List all users");
                return;
            }
            
            string[] parts = args.Split(new char[] { ' ' }, StringSplitOptions.RemoveEmptyEntries);
            if (parts.Length < 1)
            {
                Console.WriteLine("Error: Please specify a user command");
                Console.WriteLine("Usage: user <add|delete> [args]");
                return;
            }
            
            string subCommand = parts[0].ToLower();
            
            if (subCommand == "add")
            {
                if (parts.Length < 4)
                {
                    Console.WriteLine("Error: Please specify user type and username and password");
                    Console.WriteLine("Usage: user add admin <username> <password>");
                    Console.WriteLine("Usage: user add user <username> <password>");
                    return;
                }
                
                string userType = parts[1].ToLower();
                string username = parts[2];
                string password = parts[3];
                bool isAdmin = userType == "admin";
                
                userSystem.AddUser($"{username} {password}", isAdmin);
            }
            else if (subCommand == "delete")
            {
                if (parts.Length < 2)
                {
                    Console.WriteLine("Error: Please specify username");
                    Console.WriteLine("Usage: user delete <username>");
                    return;
                }
                
                string username = parts[1];
                userSystem.DeleteUser(username);
            }
            else if (subCommand == "list")
            {
                userSystem.ListUsers();
            }
            else
            {
                Console.WriteLine($"Error: Unknown user command '{subCommand}'");
                Console.WriteLine("Available commands: add, delete, list");
            }
        }

        private void ProcessBransweCommand(string args)
        {
            if (string.IsNullOrEmpty(args))
            {
                Console.WriteLine("Error: Please specify file name");
                Console.WriteLine("Usage: branswe <filename>");
                return;
            }
            
            string filePath = fileSystem.GetFullPath(args);
            
            if (!File.Exists(filePath))
            {
                Console.WriteLine($"Error: File not found: {args}");
                return;
            }
            
            try
            {
                string fileContent = File.ReadAllText(filePath);
                // Console.WriteLine($"Executing Branswe code from: {args}");
                Branswe.Run(fileContent);
                // Console.WriteLine("Branswe execution completed.");
            }
            catch (Exception ex)
            {
                Console.WriteLine($"Error executing Branswe: {ex.Message}");
            }
        }
    }
}