using System;
using System.Collections.Generic;
using System.Linq;

namespace Ryujinx.Common.Configuration
{
    [Flags]
    public enum DirtyHacks : byte
    {
        Xc2MenuSoftlockFix = 1,
        ShaderCompilationThreadSleep = 2
    }

    public record EnabledDirtyHack(DirtyHacks Hack, int Value)
    {
        private static readonly byte[] _packedFormat = [8, 32];
        
        public ulong Pack() => BitTricks.PackBitFields([(uint)Hack, (uint)Value], _packedFormat);

        public static EnabledDirtyHack FromPacked(ulong packedHack)
        {
            var unpackedFields = BitTricks.UnpackBitFields(packedHack, _packedFormat);
            if (unpackedFields is not [var hack, var value])
                throw new ArgumentException(nameof(packedHack));
            
            return new EnabledDirtyHack((DirtyHacks)hack, (int)value);
        }
    }

    public class DirtyHackCollection : Dictionary<DirtyHacks, int>
    {
        public DirtyHackCollection(EnabledDirtyHack[] hacks)
        {
            foreach ((DirtyHacks dirtyHacks, int value) in hacks)
            {
                Add(dirtyHacks, value);
            }
        }
        
        public DirtyHackCollection(ulong[] packedHacks)
        {
            foreach ((DirtyHacks dirtyHacks, int value) in packedHacks.Select(EnabledDirtyHack.FromPacked))
            {
                Add(dirtyHacks, value);
            }
        }

        public new int this[DirtyHacks hack] => TryGetValue(hack, out var value) ? value : -1;

        public bool IsEnabled(DirtyHacks hack) => ContainsKey(hack);
    }
}