using System;
using System.Collections.Generic;
using System.Globalization;
using System.IO;
using System.Windows;
using System.Windows.Data;
using System.Windows.Media.Imaging;

namespace Crysome.Server.Converters;

public class OSIconConverter : IValueConverter
{
	private static readonly Dictionary<string, BitmapImage> Cache = new Dictionary<string, BitmapImage>(StringComparer.OrdinalIgnoreCase);

	private static bool _loaded;

	public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
	{
		if (value == null)
		{
			return null;
		}
		string text = value.ToString().Trim().ToLower();
		if (string.IsNullOrEmpty(text))
		{
			return null;
		}
		if (!_loaded)
		{
			LoadAll();
		}
		if (text.Contains("windows 11") || text.Contains("server 2022"))
		{
			return GetCached("windows11");
		}
		if (text.Contains("windows 10") || text.Contains("server 2019") || text.Contains("server 2016"))
		{
			return GetCached("windows10");
		}
		if (text.Contains("8.1") || text.Contains("server 2012"))
		{
			return GetCached("windows81");
		}
		if (text.Contains("windows 8"))
		{
			return GetCached("windows81");
		}
		if (text.Contains("windows 7") || text.Contains("vista") || text.Contains("server 2008"))
		{
			return GetCached("windows7");
		}
		if (text.Contains("xp") || text.Contains("server 2003"))
		{
			return GetCached("windowsxp");
		}
		if (text.Contains("linux"))
		{
			return GetCached("linux");
		}
		if (text.Contains("windows"))
		{
			return GetCached("windows10");
		}
		return null;
	}

	public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
	{
		return DependencyProperty.UnsetValue;
	}

	private static BitmapImage GetCached(string key)
	{
		if (Cache.TryGetValue(key, out var value))
		{
			return value;
		}
		return null;
	}

	private static void LoadAll()
	{
		_loaded = true;
		string baseDirectory = AppDomain.CurrentDomain.BaseDirectory;
		string[] array = new string[2]
		{
			baseDirectory,
			Path.Combine(baseDirectory, "icons")
		};
		string[] array2 = new string[6] { "windows7", "windows81", "windows10", "windows11", "windowsxp", "linux" };
		string[] array3 = array;
		foreach (string text in array3)
		{
			if (!Directory.Exists(text))
			{
				continue;
			}
			string[] array4 = array2;
			foreach (string text2 in array4)
			{
				if (Cache.ContainsKey(text2))
				{
					continue;
				}
				string text3 = Path.Combine(text, text2 + ".png");
				if (File.Exists(text3))
				{
					try
					{
						BitmapImage bitmapImage = new BitmapImage();
						bitmapImage.BeginInit();
						bitmapImage.UriSource = new Uri(text3);
						bitmapImage.DecodePixelHeight = 16;
						bitmapImage.CacheOption = BitmapCacheOption.OnLoad;
						bitmapImage.EndInit();
						((Freezable)bitmapImage).Freeze();
						Cache[text2] = bitmapImage;
					}
					catch
					{
					}
				}
			}
		}
	}
}