using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Reflection;
using System.Runtime.CompilerServices;
using System.Runtime.Versioning;
using Microsoft.CodeAnalysis;

[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("evu")]
[assembly: AssemblyConfiguration("Release")]
[assembly: AssemblyCopyright("Copyright (c) 2026 imevul")]
[assembly: AssemblyDescription("Compatibility fixes for other Valheim mods.")]
[assembly: AssemblyFileVersion("0.2.0.0")]
[assembly: AssemblyInformationalVersion("0.2.0+ac059ef239dd58a46c4673283cd7d6ce2d5f5dbe")]
[assembly: AssemblyProduct("EvuMiscCompat")]
[assembly: AssemblyTitle("EvuMiscCompat.Core")]
[assembly: AssemblyMetadata("RepositoryUrl", "https://github.com/EvuMods/EvuMiscCompat")]
[assembly: AssemblyVersion("0.2.0.0")]
[module: RefSafetyRules(11)]
namespace Microsoft.CodeAnalysis
{
	[CompilerGenerated]
	[Embedded]
	internal sealed class EmbeddedAttribute : Attribute
	{
	}
}
namespace System.Runtime.CompilerServices
{
	[CompilerGenerated]
	[Embedded]
	internal sealed class IsReadOnlyAttribute : Attribute
	{
	}
	[CompilerGenerated]
	[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]
	[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]
	[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 EvuMiscCompat.Core
{
	public enum IlOpKind
	{
		Other,
		Ldarg0,
		Ldarg1,
		Ldarg2,
		LdcI4_3,
		BneUn,
		Call,
		Brtrue
	}
	public readonly struct IlOp : IEquatable<IlOp>
	{
		public IlOpKind Kind { get; }

		public string? Name { get; }

		public IlOp(IlOpKind kind, string? name = null)
		{
			Kind = kind;
			Name = name;
		}

		public bool Equals(IlOp other)
		{
			if (Kind == other.Kind)
			{
				return Name == other.Name;
			}
			return false;
		}

		public override bool Equals(object? obj)
		{
			if (obj is IlOp other)
			{
				return Equals(other);
			}
			return false;
		}

		public override int GetHashCode()
		{
			return ((int)Kind * 397) ^ (Name?.GetHashCode() ?? 0);
		}
	}
	public static class DualWieldWindow
	{
		public const string OffhandMethod = "CheckDualOneHandedWeaponEquip";

		public static List<IlOp> Repair(IReadOnlyList<IlOp> code)
		{
			List<IlOp> list = new List<IlOp>(code.Count + 5);
			for (int i = 0; i < code.Count; i++)
			{
				list.Add(code[i]);
				if (IsOneHandedBranch(code, i) && !HasOffhandFallthrough(code, i))
				{
					string name = code[i].Name;
					list.Add(new IlOp(IlOpKind.Ldarg0));
					list.Add(new IlOp(IlOpKind.Ldarg1));
					list.Add(new IlOp(IlOpKind.Ldarg2));
					list.Add(new IlOp(IlOpKind.Call, "CheckDualOneHandedWeaponEquip"));
					list.Add(new IlOp(IlOpKind.Brtrue, name));
				}
			}
			return list;
		}

		private static bool IsOneHandedBranch(IReadOnlyList<IlOp> code, int index)
		{
			if (code[index].Kind != IlOpKind.BneUn)
			{
				return false;
			}
			if (index < 1 || code[index - 1].Kind != IlOpKind.LdcI4_3)
			{
				return false;
			}
			if (!IsVanillaWindow(code, index))
			{
				return IsTrinketsWindow(code, index);
			}
			return true;
		}

		private static bool IsVanillaWindow(IReadOnlyList<IlOp> code, int branch)
		{
			if (branch >= 4 && code[branch - 4].Kind == IlOpKind.Ldarg1 && code[branch - 3].Kind == IlOpKind.Other)
			{
				return code[branch - 2].Kind == IlOpKind.Other;
			}
			return false;
		}

		private static bool IsTrinketsWindow(IReadOnlyList<IlOp> code, int branch)
		{
			if (branch >= 7 && code[branch - 7].Kind == IlOpKind.Ldarg1 && code[branch - 6].Kind == IlOpKind.Other && code[branch - 5].Kind == IlOpKind.Other && code[branch - 4].Kind == IlOpKind.Ldarg0 && code[branch - 3].Kind == IlOpKind.Ldarg1)
			{
				return code[branch - 2].Kind == IlOpKind.Call;
			}
			return false;
		}

		private static bool HasOffhandFallthrough(IReadOnlyList<IlOp> code, int branch)
		{
			if (branch + 5 >= code.Count)
			{
				return false;
			}
			if (code[branch + 1].Kind == IlOpKind.Ldarg0 && code[branch + 2].Kind == IlOpKind.Ldarg1 && code[branch + 3].Kind == IlOpKind.Ldarg2 && code[branch + 4].Kind == IlOpKind.Call && code[branch + 4].Name == "CheckDualOneHandedWeaponEquip" && code[branch + 5].Kind == IlOpKind.Brtrue)
			{
				return code[branch + 5].Name == code[branch].Name;
			}
			return false;
		}
	}
}