using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.IO;
using System.Reflection;
using System.Runtime.CompilerServices;
using System.Runtime.Versioning;
using System.Security;
using System.Security.Permissions;
using System.Text;
using BepInEx;
using BepInEx.Logging;
using Microsoft.CodeAnalysis;
using Mono.Cecil;

[assembly: CompilationRelaxations(8)]
[assembly: RuntimeCompatibility(WrapNonExceptionThrows = true)]
[assembly: Debuggable(DebuggableAttribute.DebuggingModes.IgnoreSymbolStoreSequencePoints)]
[assembly: TargetFramework(".NETStandard,Version=v2.1", FrameworkDisplayName = ".NET Standard 2.1")]
[assembly: AssemblyCompany("DaXcess")]
[assembly: AssemblyConfiguration("Release")]
[assembly: AssemblyCopyright("Copyright (c) DaXcess 2026")]
[assembly: AssemblyDescription("RepoXR Preloader")]
[assembly: AssemblyFileVersion("1.2.2.0")]
[assembly: AssemblyInformationalVersion("1.2.2+b9a820e6a3701d416b6134275db93f484314aa13")]
[assembly: AssemblyProduct("RepoXR.Preload")]
[assembly: AssemblyTitle("RepoXR.Preload")]
[assembly: AssemblyMetadata("RepositoryUrl", "https://github.com/DaXcess/RepoXR")]
[assembly: SecurityPermission(SecurityAction.RequestMinimum, SkipVerification = true)]
[assembly: AssemblyVersion("1.2.2.0")]
[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.Class | AttributeTargets.Property | AttributeTargets.Field | AttributeTargets.Event | AttributeTargets.Parameter | AttributeTargets.ReturnValue | AttributeTargets.GenericParameter, AllowMultiple = false, Inherited = false)]
	internal sealed class NullableAttribute : Attribute
	{
		public readonly byte[] NullableFlags;

		public NullableAttribute(byte P_0)
		{
			NullableFlags = new byte[1] { P_0 };
		}

		public NullableAttribute(byte[] P_0)
		{
			NullableFlags = P_0;
		}
	}
	[CompilerGenerated]
	[Microsoft.CodeAnalysis.Embedded]
	[AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct | AttributeTargets.Method | AttributeTargets.Interface | AttributeTargets.Delegate, AllowMultiple = false, Inherited = false)]
	internal sealed class NullableContextAttribute : Attribute
	{
		public readonly byte Flag;

		public NullableContextAttribute(byte P_0)
		{
			Flag = P_0;
		}
	}
	[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 RepoXR.Preload
{
	public static class Preload
	{
		private const string VR_MANIFEST = "{\n  \"name\": \"OpenXR XR Plugin\",\n  \"version\": \"1.10.0\",\n  \"libraryName\": \"UnityOpenXR\",\n  \"displays\": [\n    {\n      \"id\": \"OpenXR Display\"\n    }\n  ],\n  \"inputs\": [\n    {\n      \"id\": \"OpenXR Input\"\n    }\n  ]\n}";

		private static readonly ManualLogSource Logger = Logger.CreateLogSource("RepoXR.Preload");

		public static IEnumerable<string> TargetDLLs { get; } = Array.Empty<string>();


		public static void Initialize()
		{
			SetupRuntimeAssets();
			DiscoverGameVersion();
			Logger.LogInfo((object)"We're done here. Goodbye!");
		}

		private static void SetupRuntimeAssets()
		{
			Logger.LogInfo((object)"Setting up VR runtime assets");
			string path = Path.Combine(Paths.GameRootPath, "REPO_Data");
			string text = Path.Combine(path, "UnitySubsystems");
			if (!Directory.Exists(text))
			{
				Directory.CreateDirectory(text);
			}
			string text2 = Path.Combine(text, "UnityOpenXR");
			if (!Directory.Exists(text2))
			{
				Directory.CreateDirectory(text2);
			}
			string path2 = Path.Combine(text2, "UnitySubsystemsManifest.json");
			if (!File.Exists(path2))
			{
				File.WriteAllText(path2, "{\n  \"name\": \"OpenXR XR Plugin\",\n  \"version\": \"1.10.0\",\n  \"libraryName\": \"UnityOpenXR\",\n  \"displays\": [\n    {\n      \"id\": \"OpenXR Display\"\n    }\n  ],\n  \"inputs\": [\n    {\n      \"id\": \"OpenXR Input\"\n    }\n  ]\n}");
			}
			string path3 = Path.Combine(path, "Plugins");
			string destFileName = Path.Combine(path3, "UnityOpenXR.dll");
			string destFileName2 = Path.Combine(path3, "openxr_loader.dll");
			string? directoryName = Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location);
			string sourceFileName = Path.Combine(directoryName, "RuntimeDeps/UnityOpenXR.dll");
			string sourceFileName2 = Path.Combine(directoryName, "RuntimeDeps/openxr_loader.dll");
			File.Copy(sourceFileName, destFileName, overwrite: true);
			File.Copy(sourceFileName2, destFileName2, overwrite: true);
		}

		private static void DiscoverGameVersion()
		{
			using (FileStream fileStream = File.OpenRead(Path.Combine(Paths.GameRootPath, "REPO_Data/sharedassets0.assets")))
			{
				int num = FindOffset(fileStream) - 4;
				if (num < 0)
				{
					throw new ApplicationException("Unknown application version");
				}
				fileStream.Seek(num, SeekOrigin.Begin);
				using BinaryReader binaryReader = new BinaryReader(fileStream, Encoding.ASCII);
				int count = binaryReader.ReadInt32();
				string @string = Encoding.ASCII.GetString(binaryReader.ReadBytes(count));
				if (!@string.StartsWith("Version - "))
				{
					throw new ApplicationException("Unknown application version");
				}
				fileStream.Position = checked(fileStream.Position + 3) & -4;
				count = binaryReader.ReadInt32();
				string string2 = Encoding.ASCII.GetString(binaryReader.ReadBytes(count));
				string text = @string.Split(" - ")[1];
				Logger.LogInfo((object)("Version: " + text + " " + string2));
				Environment.SetEnvironmentVariable("REPO_VERSION", string2);
				Environment.SetEnvironmentVariable("REPO_BRANCH", text);
			}
			static int FindOffset(FileStream stream)
			{
				byte[] bytes = Encoding.ASCII.GetBytes("Version - ");
				long num3 = stream.Length;
				Span<byte> span = stackalloc byte[4160];
				Span<byte> destination = stackalloc byte[64];
				int num4 = 0;
				while (num3 > 0)
				{
					int num5 = (int)Math.Min(4096L, num3);
					num3 -= num5;
					stream.Seek(num3, SeekOrigin.Begin);
					Span<byte> span2 = span.Slice(0, num5);
					stream.Read(span2);
					if (num4 > 0)
					{
						destination.Slice(0, num4).CopyTo(span.Slice(num5));
						span2 = span.Slice(0, num5 + num4);
					}
					int num6 = LastIndexOf(span2, bytes);
					if (num6 >= 0)
					{
						return (int)num3 + num6;
					}
					num4 = Math.Min(bytes.Length - 1, num5);
					span2.Slice(0, num4).CopyTo(destination);
				}
				return -1;
			}
			static int LastIndexOf(ReadOnlySpan<byte> haystack, ReadOnlySpan<byte> needle)
			{
				if (needle.Length == 0)
				{
					return 0;
				}
				for (int num2 = haystack.Length - needle.Length; num2 >= 0; num2--)
				{
					while (num2 >= 0)
					{
						if (haystack[num2 + needle.Length - 1] == needle[needle.Length - 1])
						{
							break;
						}
						num2--;
					}
					if (num2 < 0)
					{
						break;
					}
					if (haystack.Slice(num2, needle.Length).SequenceEqual(needle))
					{
						return num2;
					}
				}
				return -1;
			}
		}

		public static void Patch(AssemblyDefinition assembly)
		{
		}
	}
}