using qdr.app.tools.qfu.Commands.Aspects;
using Quadarax.Foundation.Core.QConsole;
using Quadarax.Foundation.Core.QConsole.Argument;
using Quadarax.Foundation.Core.QConsole.Attributes;
using Quadarax.Foundation.Core.Value;
using System.Drawing;
using System.Drawing.Imaging;

namespace qdr.app.tools.qfu.Commands
{
    [CommandDefinition]
    internal class ImgListCmd : BaseCmd
    {
        #region *** Constants ***
        private const string CMD_NAME = "img_list";
        private const string CMD_DESCR = "List all image files from source directory with dimensions, resolution and size information.";

        // Common image file extensions
        private static readonly string[] ImageExtensions = {
            ".jpg", ".jpeg", ".png", ".gif", ".bmp", ".tiff", ".tif", 
            ".webp", ".ico", ".svg", ".psd", ".raw", ".cr2", ".nef", ".arw"
        };
        #endregion

        #region *** Properties ***
        public override string Name => CMD_NAME;
        public override string Description => CMD_DESCR;

        protected string Directory { get; private set; } = string.Empty;
        protected bool IncludeSubdirectories { get; private set; } = false;
        protected string[] ExcludePatterns { get; private set; } = Array.Empty<string>();
        #endregion

        #region *** Constructors ***
        public ImgListCmd(Engine engine) : base(engine)
        {
        }
        #endregion

        #region *** Overrides ***
        #region **** EXECUTE ****
        protected override Result OnExecute()
        {
            var subdirText = IncludeSubdirectories ? " and subdirectories" : "";
            var excludeText = ExcludePatterns.Length > 0 ? $" (excluding: {string.Join(", ", ExcludePatterns)})" : "";
            
            WriteCaption($"Listing image files from '{Directory}'{subdirText}{excludeText}...");
            WriteInfo($"{"Dimensions",-12}\t{"Resolution",-15}\t{"Size",-10}\t{"File Path"}");
            WriteInfo($"{new string('-', 12)}\t{new string('-', 15)}\t{new string('-', 10)}\t{new string('-', 50)}");

            var totalFiles = 0;
            var processedFiles = 0;
            var errors = new List<string>();

            try
            {
                var searchOption = IncludeSubdirectories ? SearchOption.AllDirectories : SearchOption.TopDirectoryOnly;
                var allImageFiles = new List<string>();

                // Get all files with image extensions
                foreach (var extension in ImageExtensions)
                {
                    try
                    {
                        var files = FileSystem.Directory.GetFiles(Directory, $"*{extension}", searchOption);
                        allImageFiles.AddRange(files);
                    }
                    catch (Exception ex)
                    {
                        WriteWarning($"Failed to search for {extension} files: {ex.Message}");
                    }
                }

                // Remove duplicates and apply exclusion filters
                var uniqueFiles = allImageFiles.Distinct().ToList();
                var filteredFiles = ApplyExcludeFilters(uniqueFiles);

                totalFiles = filteredFiles.Count;

                foreach (var filePath in filteredFiles.OrderBy(f => f))
                {
                    processedFiles++;
                    
                    try
                    {
                        var relativePath = Path.GetRelativePath(Directory, filePath);
                        var imageInfo = GetImageInfo(filePath);
                        
                        if (imageInfo != null)
                        {
                            WriteInfo($"{imageInfo.Dimensions,-12}\t{imageInfo.Resolution,-15}\t{imageInfo.Size,-10}\t{relativePath}");
                        }
                        else
                        {
                            WriteWarning($"{"N/A",-12}\t{"N/A",-15}\t{GetFileSize(filePath),-10}\t{relativePath} (unsupported format)");
                        }
                    }
                    catch (Exception ex)
                    {
                        var relativePath = Path.GetRelativePath(Directory, filePath);
                        var errorMsg = $"Failed to process '{relativePath}': {ex.Message}";
                        errors.Add(errorMsg);
                        WriteError($"{"ERROR",-12}\t{"ERROR",-15}\t{GetFileSize(filePath),-10}\t{relativePath}");
                    }
                }

                WriteCaption($"Successfully processed: {processedFiles} of {totalFiles} image files.");
                
                if (errors.Count > 0)
                {
                    WriteWarning($"Encountered {errors.Count} errors during operation.");
                }

                return errors.Count == 0 ? new Result() : new Result(new Exception($"Failed to process {errors.Count} files."));
            }
            catch (Exception ex)
            {
                WriteError($"Critical error during operation: {ex.Message}");
                return new Result(ex);
            }
        }
        #endregion

        #region **** Arguments ****
        protected override void OnValidateArguments()
        {
            base.OnValidateArguments();

            // Get and validate directory (using Source from BaseCmd)
            Directory = Source;
            if (!FileSystem.Directory.Exists(Directory))
                throw new ArgumentException($"Directory '{Directory}' does not exist.", SourceAspect.ARG_SRC_NAME);

            // Get flags
            IncludeSubdirectories = GetArgumentValueOrDefault<bool>(SubdirsAspect.ARG_SUBDIRS_NAME, false);

            // Get exclude patterns
            ExcludePatterns = ExcludeAspect.GetExcludePatterns(this);
        }

        protected override IEnumerable<AbstractArgument> OnSetupArguments()
        {
            var list = base.OnSetupArguments().ToList();
            
            // Add our specific arguments
            list.AddRange(SubdirsAspect.SetupArguments());
            list.AddRange(ExcludeAspect.SetupArguments());
            
            return list;
        }
        #endregion

        #region **** Private Operations ****
        private ImageInfo? GetImageInfo(string filePath)
        {
            try
            {
                using var fileStream = FileSystem.File.OpenRead(filePath);
                using var image = Image.FromStream(fileStream, false, false);
                
                var width = image.Width;
                var height = image.Height;
                var dimensions = $"{width}x{height}";
                
                // Get resolution (DPI)
                var horizontalRes = image.HorizontalResolution;
                var verticalRes = image.VerticalResolution;
                var resolution = $"{horizontalRes:F0}x{verticalRes:F0} DPI";
                
                // Get file size
                var size = GetFileSize(filePath);
                
                return new ImageInfo(dimensions, resolution, size);
            }
            catch
            {
                // If System.Drawing can't handle the image, try to at least get basic info
                return null;
            }
        }

        private string GetFileSize(string filePath)
        {
            try
            {
                var fileInfo = FileSystem.FileInfo.New(filePath);
                var bytes = fileInfo.Length;
                
                return bytes switch
                {
                    < 1024 => $"{bytes} B",
                    < 1024 * 1024 => $"{bytes / 1024.0:F1} KB",
                    < 1024 * 1024 * 1024 => $"{bytes / (1024.0 * 1024.0):F1} MB",
                    _ => $"{bytes / (1024.0 * 1024.0 * 1024.0):F1} GB"
                };
            }
            catch
            {
                return "N/A";
            }
        }

        private List<string> ApplyExcludeFilters(List<string> files)
        {
            if (ExcludePatterns.Length == 0)
                return files;

            var filteredFiles = new List<string>();

            foreach (var file in files)
            {
                var fileName = Path.GetFileName(file);
                var shouldExclude = false;

                foreach (var pattern in ExcludePatterns)
                {
                    if (IsMatch(fileName, pattern) || IsMatch(file, pattern))
                    {
                        shouldExclude = true;
                        break;
                    }
                }

                if (!shouldExclude)
                {
                    filteredFiles.Add(file);
                }
            }

            return filteredFiles;
        }

        private bool IsMatch(string input, string pattern)
        {
            // Simple pattern matching - supports * wildcards
            if (string.IsNullOrEmpty(pattern))
                return false;

            if (pattern == "*")
                return true;

            // Convert pattern to regex-like matching
            var regexPattern = "^" + pattern.Replace("*", ".*").Replace("?", ".") + "$";
            return System.Text.RegularExpressions.Regex.IsMatch(input, regexPattern, System.Text.RegularExpressions.RegexOptions.IgnoreCase);
        }
        #endregion
        #endregion

        #region *** Helper Classes ***
        private record ImageInfo(string Dimensions, string Resolution, string Size);
        #endregion
    }
}