//-----------------------------------------------------------------------
// -----------------------------------------------------------------------
// file="M128"
// Project: StgSharp
// AuthorGroup: Nitload Space
// Copyright (c) Nitload Space. All rights reserved.
//     
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
//     
// -----------------------------------------------------------------------
// -----------------------------------------------------------------------
using System;
using System.Collections.Generic;
using System.Diagnostics.CodeAnalysis;
using System.Numerics;
using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;
using System.Runtime.Intrinsics;
using System.Runtime.Intrinsics.X86;

using System.Text;

namespace StgSharp.Mathematics
{
    [StructLayout(LayoutKind.Explicit, Pack = 16)]
    public unsafe struct M128 : IRegisterPresentation
    {

        [FieldOffset(0)] internal fixed byte Buffer[16];
        [FieldOffset(0)] internal Vector128<float> Vec;

        internal M128(Vector4 v)
        {
            Unsafe.SkipInit(out this);
            Unsafe.SkipInit(out Vec);
            Vec = v.AsVector128();
        }

        internal M128(Vector128<float> v)
        {
            Unsafe.SkipInit(out this);
            Vec = v;
        }

        public ref T AsRef<T>() where T: unmanaged, INumber<T>
        {
            return ref Unsafe.As<byte, T>(ref Buffer[0]);
        }

        [MethodImpl(MethodImplOptions.AggressiveInlining)]
        public readonly Vector4 AsVector4()
        {
            return Vec.AsVector4();
        }

        public void BroadCastFrom<T>(T value) where T: unmanaged, INumber<T>
        {
            Vec = Vector128.Create<T>(value).AsSingle();
        }

        public override readonly bool Equals([NotNullWhen(true)] object obj)
        {
            return obj is M128 other && this == other;
        }

        public override readonly int GetHashCode()
        {
            return Vec.GetHashCode();
        }

        [MethodImpl(MethodImplOptions.AggressiveInlining)]
        public ref T Member<T>(int index) where T: unmanaged, INumber<T>
        {
            return ref Unsafe.Add(ref AsRef<T>(), index);
        }

        public override string ToString()
        {
            return string.Empty;
        }

        public string ToString(int sample)
        {
            string str = string.Empty;
            for (int i = 15; i >= 0; i--) {
                str += $"{Convert.ToString(Buffer[i], sample)} ";
            }
            return str;
        }

        [MethodImpl(MethodImplOptions.AggressiveInlining)]
        public static bool operator !=(M128 left, M128 right)
        {
            return left.Vec != right.Vec;
        }

        [MethodImpl(MethodImplOptions.AggressiveInlining)]
        public static bool operator ==(M128 left, M128 right)
        {
            return left.Vec == right.Vec;
        }

    }
}