#define TRACE
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Reflection;
using System.Reflection.Emit;
using System.Runtime.CompilerServices;
using System.Runtime.Versioning;
using System.Security;
using System.Security.Permissions;
using BepInEx.Bootstrap;
using HarmonyLib;
using HarmonyLib.Internal.Patching;
using Microsoft.CodeAnalysis;
using Mono.Cecil;
using Mono.Cecil.Cil;
using MonoMod.Utils;

[assembly: CompilationRelaxations(8)]
[assembly: RuntimeCompatibility(WrapNonExceptionThrows = true)]
[assembly: Debuggable(DebuggableAttribute.DebuggingModes.IgnoreSymbolStoreSequencePoints)]
[assembly: IgnoresAccessChecksTo("0Harmony")]
[assembly: TargetFramework(".NETStandard,Version=v2.1", FrameworkDisplayName = ".NET Standard 2.1")]
[assembly: AssemblyCompany("LethalLevelLoader.Patcher")]
[assembly: AssemblyConfiguration("Release")]
[assembly: AssemblyFileVersion("1.0.0.0")]
[assembly: AssemblyInformationalVersion("1.0.0+91ce948550bf16502208ab52512cca78b892665c")]
[assembly: AssemblyProduct("LethalLevelLoader.Patcher")]
[assembly: AssemblyTitle("LethalLevelLoader.Patcher")]
[assembly: AssemblyMetadata("RepositoryUrl", "https://github.com/IAmBatby/LethalLevelLoader/")]
[assembly: SecurityPermission(SecurityAction.RequestMinimum, SkipVerification = true)]
[assembly: AssemblyVersion("1.0.0.0")]
[module: UnverifiableCode]
[module: RefSafetyRules(11)]
namespace Microsoft.CodeAnalysis
{
	[CompilerGenerated]
	[Microsoft.CodeAnalysis.Embedded]
	internal sealed class EmbeddedAttribute : Attribute
	{
	}
}
namespace System.Runtime.CompilerServices
{
	[CompilerGenerated]
	[Microsoft.CodeAnalysis.Embedded]
	[AttributeUsage(AttributeTargets.Module, AllowMultiple = false, Inherited = false)]
	internal sealed class RefSafetyRulesAttribute : Attribute
	{
		public readonly int Version;

		public RefSafetyRulesAttribute(int P_0)
		{
			Version = P_0;
		}
	}
}
namespace LethalLevelLoader.Patcher
{
	public class LethalLevelLoaderPatcher
	{
		public static IEnumerable<string> TargetDLLs { get; } = Array.Empty<string>();


		internal static Harmony Harmony { get; } = new Harmony("imabatby.lethallevelloader.patcher");


		public static event Action onChainloaderFinish;

		private static void Initialize()
		{
			Trace.TraceInformation("[LethalLevelLoader.Patcher] Initializing...");
		}

		private static void Finish()
		{
			Trace.TraceInformation("[LethalLevelLoader.Patcher] Patching...");
			Harmony.PatchAll(typeof(ChainloaderEventPatch));
			Harmony.PatchAll(typeof(CursedHarmonyPatch));
			Trace.TraceInformation("[LethalLevelLoader.Patcher] Done!");
		}

		private static void ChainloaderFinish()
		{
			try
			{
				LethalLevelLoaderPatcher.onChainloaderFinish?.Invoke();
				LethalLevelLoaderPatcher.onChainloaderFinish = null;
			}
			catch (Exception ex)
			{
				Trace.TraceError("[LethalLevelLoader.Patcher] Error during Chainloader event invokation: " + ex);
			}
		}

		public static void Patch(AssemblyDefinition _)
		{
		}
	}
	[HarmonyPatch]
	internal static class ChainloaderEventPatch
	{
		[HarmonyPatch(typeof(Chainloader), "Initialize")]
		[HarmonyPostfix]
		[HarmonyPriority(0)]
		private static void ChainloaderInitialize_Postfix()
		{
			//IL_0036: Unknown result type (might be due to invalid IL or missing references)
			//IL_0043: Expected O, but got Unknown
			MethodInfo method = typeof(Chainloader).GetMethod("Start", BindingFlags.Static | BindingFlags.Public);
			MethodInfo method2 = typeof(LethalLevelLoaderPatcher).GetMethod("ChainloaderFinish", BindingFlags.Static | BindingFlags.NonPublic);
			LethalLevelLoaderPatcher.Harmony.Patch((MethodBase)method, (HarmonyMethod)null, new HarmonyMethod(method2), (HarmonyMethod)null, (HarmonyMethod)null, (HarmonyMethod)null);
		}
	}
	internal static class CursedHarmonyPatch
	{
		private static void ReadInstruction_Prefix(Instruction ins)
		{
			//IL_002c: Unknown result type (might be due to invalid IL or missing references)
			//IL_0036: Expected O, but got Unknown
			if (ins.Operand is DynamicMethod dynamicMethod)
			{
				ModuleDefinition val = ModuleDefinition.ReadModule(typeof(object).Module.FullyQualifiedName);
				ins.Operand = (object)new DynamicMethodReference(val, (MethodInfo)dynamicMethod);
				Trace.TraceInformation("[LethalLevelLoader.Patcher] DynamicMethod '" + dynamicMethod.Name + "' replaced!");
			}
		}

		[HarmonyPatch(typeof(Chainloader), "Initialize")]
		[HarmonyPostfix]
		[HarmonyPriority(800)]
		private static void ChainloaderInitialize_Postfix()
		{
			//IL_00ef: Unknown result type (might be due to invalid IL or missing references)
			//IL_00f6: Expected O, but got Unknown
			string environmentVariable = Environment.GetEnvironmentVariable("MONOMOD_DMD_TYPE");
			if (!string.IsNullOrEmpty(environmentVariable) && !string.Equals(environmentVariable, "dynamicmethod", StringComparison.Ordinal))
			{
				return;
			}
			Type type = null;
			MethodInfo methodInfo = null;
			Assembly assembly = Assembly.GetAssembly(typeof(ILManipulator));
			Type[] types = assembly.GetTypes();
			for (int num = types.Length - 1; num >= 0; num--)
			{
				type = types[num];
				MethodInfo[] methods = type.GetMethods(BindingFlags.Instance | BindingFlags.NonPublic);
				methodInfo = Array.Find(methods, (MethodInfo method) => method.Name.Contains("ReadInstruction", StringComparison.Ordinal));
				if (methodInfo != null)
				{
					Trace.TraceInformation("[LethalLevelLoader.Patcher] Found Method '" + type.FullName + "/" + methodInfo.Name + "'!");
					break;
				}
			}
			if (!(methodInfo == null))
			{
				HarmonyMethod val = new HarmonyMethod(typeof(CursedHarmonyPatch), "ReadInstruction_Prefix", (Type[])null);
				LethalLevelLoaderPatcher.Harmony.Patch((MethodBase)methodInfo, val, (HarmonyMethod)null, (HarmonyMethod)null, (HarmonyMethod)null, (HarmonyMethod)null);
			}
		}
	}
}
namespace System.Runtime.CompilerServices
{
	[AttributeUsage(AttributeTargets.Assembly, AllowMultiple = true)]
	internal sealed class IgnoresAccessChecksToAttribute : Attribute
	{
		public IgnoresAccessChecksToAttribute(string assemblyName)
		{
		}
	}
}