using LibationUiBase;
using SixLabors.ImageSharp;
using System;
using System.IO;

namespace WindowsConfigApp
{	
	internal static partial class FolderIcon
	{
		static readonly IcoEncoder IcoEncoder = new();
		public static byte[] ToIcon(this Image img)
		{
			using var ms = new MemoryStream();			
			img.Save(ms, IcoEncoder);			
			return ms.ToArray();
		}

		public static void DeleteIcon(this DirectoryInfo directoryInfo) => DeleteIcon(directoryInfo.FullName);
		public static void DeleteIcon(string dir)
		{
			string[] array = new string[3] { "desktop.ini", "Icon.ico", ".hidden" };
			foreach (string path in array)
			{
				string text = Path.Combine(dir, path);
				if (File.Exists(text))
				{
					File.SetAttributes(text, File.GetAttributes(text) | FileAttributes.Normal);
					new FileInfo(text).IsReadOnly = false;
					File.Delete(text);
				}
			}
		}

		// https://github.com/dimuththarindu/FIC-Folder-Icon-Changer/blob/master/project/FIC/Classes/IconCustomizer.cs

		public static void SetIcon(this DirectoryInfo directoryInfo, byte[] icon, string folderType)
			=> SetIcon(directoryInfo.FullName, icon, folderType);

		public static void SetIcon(string dir, byte[] icon, string folderType)
		{
			var desktop_ini = Path.Combine(dir, "desktop.ini");
			var Icon_ico = Path.Combine(dir, "Icon.ico");

			//deleting existing files
			DeleteIcon(dir);

			//copying Icon file //overwriting
			File.WriteAllBytes(Icon_ico, icon);

			//writing configuration file
			string[] desktopLines = { "[.ShellClassInfo]", "ConfirmFileOp=0", "IconResource=Icon.ico,0", "[ViewState]", "Mode=", "Vid=", $"FolderType={folderType}" };
			File.WriteAllLines(desktop_ini, desktopLines);

			File.SetAttributes(desktop_ini, File.GetAttributes(desktop_ini) | FileAttributes.Hidden | FileAttributes.ReadOnly);
			File.SetAttributes(Icon_ico, File.GetAttributes(Icon_ico) | FileAttributes.Hidden | FileAttributes.ReadOnly);

			//https://learn.microsoft.com/en-us/windows/win32/shell/how-to-customize-folders-with-desktop-ini
			File.SetAttributes(dir, File.GetAttributes(dir) | FileAttributes.System);
		}
	}
}