using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.IO;
using System.Linq;
using System.Reflection;
using System.Runtime.CompilerServices;
using System.Runtime.Versioning;
using BepInEx.Logging;
using Mono.Cecil;
using Mono.Cecil.Cil;
using Mono.Collections.Generic;
using MonoMod.Utils;

[assembly: CompilationRelaxations(8)]
[assembly: RuntimeCompatibility(WrapNonExceptionThrows = true)]
[assembly: Debuggable(DebuggableAttribute.DebuggingModes.IgnoreSymbolStoreSequencePoints)]
[assembly: TargetFramework(".NETStandard,Version=v2.0", FrameworkDisplayName = ".NET Standard 2.0")]
[assembly: AssemblyCompany("PAMultiplayer.Preloader")]
[assembly: AssemblyConfiguration("Release")]
[assembly: AssemblyFileVersion("1.0.0.0")]
[assembly: AssemblyInformationalVersion("1.0.0+2449a663dd6a8aa20bf6670ef118ae704f14f34d")]
[assembly: AssemblyProduct("PAMultiplayer.Preloader")]
[assembly: AssemblyTitle("PAMultiplayer.Preloader")]
[assembly: AssemblyVersion("1.0.0.0")]
namespace PAMultiplayer.Preloader;

public static class Patcher
{
	public static IEnumerable<string> TargetDLLs { get; } = new string[2] { "Facepunch.Steamworks.Win64.dll", "DiscordRPC.dll" };


	public static void Patch(ref AssemblyDefinition assembly)
	{
		string name = ((AssemblyNameReference)assembly.Name).Name;
		if (!(name == "DiscordRPC"))
		{
			if (name == "Facepunch.Steamworks.Win64")
			{
				assembly = AssemblyDefinition.ReadAssembly(Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location) + "\\Facepunch.Steamworks.Win64.dll");
				PatchFacepunch(assembly);
			}
		}
		else
		{
			assembly = AssemblyDefinition.ReadAssembly(Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location) + "\\DiscordRPC.dll");
		}
	}

	private static void PatchFacepunch(AssemblyDefinition assembly)
	{
		//IL_002b: Unknown result type (might be due to invalid IL or missing references)
		//IL_0030: Unknown result type (might be due to invalid IL or missing references)
		//IL_0043: Unknown result type (might be due to invalid IL or missing references)
		//IL_0048: Unknown result type (might be due to invalid IL or missing references)
		//IL_0177: Unknown result type (might be due to invalid IL or missing references)
		//IL_0182: Unknown result type (might be due to invalid IL or missing references)
		//IL_018d: Unknown result type (might be due to invalid IL or missing references)
		//IL_0198: Unknown result type (might be due to invalid IL or missing references)
		//IL_01ae: Unknown result type (might be due to invalid IL or missing references)
		//IL_005b: Unknown result type (might be due to invalid IL or missing references)
		//IL_0060: Unknown result type (might be due to invalid IL or missing references)
		ManualLogSource val = Logger.CreateLogSource("me.ytarame.multiplayer.preloader2");
		try
		{
			string name = Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location) + "\\steam_api64.dll";
			Enumerator<ModuleDefinition> enumerator = assembly.Modules.GetEnumerator();
			try
			{
				while (enumerator.MoveNext())
				{
					Enumerator<TypeDefinition> enumerator2 = enumerator.Current.Types.GetEnumerator();
					try
					{
						while (enumerator2.MoveNext())
						{
							Enumerator<MethodDefinition> enumerator3 = enumerator2.Current.Methods.GetEnumerator();
							try
							{
								while (enumerator3.MoveNext())
								{
									MethodDefinition current = enumerator3.Current;
									if (current.IsPInvokeImpl && current.PInvokeInfo != null && !(current.PInvokeInfo.Module.Name != "steam_api64"))
									{
										val.LogInfo((object)"Found steam_api64 import");
										current.PInvokeInfo.Module.Name = name;
										break;
									}
								}
							}
							finally
							{
								((IDisposable)enumerator3).Dispose();
							}
						}
					}
					finally
					{
						((IDisposable)enumerator2).Dispose();
					}
				}
			}
			finally
			{
				((IDisposable)enumerator).Dispose();
			}
			TypeDefinition type = assembly.MainModule.GetType("Steamworks.Ugc.Editor");
			MethodDefinition val2 = ((IEnumerable<MethodDefinition>)type.Methods).First((MethodDefinition m) => ((MemberReference)m).Name == "SubmitAsync");
			MethodDefinition val3 = Extensions.Clone(val2, (MethodDefinition)null);
			val3.Body.Instructions.Clear();
			((MethodReference)val3).Parameters.RemoveAt(1);
			ILProcessor iLProcessor = val3.Body.GetILProcessor();
			iLProcessor.Emit(OpCodes.Ldarg_0);
			iLProcessor.Emit(OpCodes.Ldarg_1);
			iLProcessor.Emit(OpCodes.Ldnull);
			iLProcessor.Emit(OpCodes.Call, assembly.MainModule.ImportReference((MethodReference)(object)val2));
			iLProcessor.Emit(OpCodes.Ret);
			type.Methods.Add(val3);
		}
		finally
		{
			((IDisposable)val)?.Dispose();
		}
	}
}