using System.IO.Hashing;
using System.Runtime.InteropServices;

namespace ContentProxy;

public sealed class CacheKeyComparer : StringComparer
{
	internal static readonly CacheKeyComparer Instance = new();

	private CacheKeyComparer()
	{ }

	public override int Compare(string? x, string? y) => string.CompareOrdinal(x, y);

	public override bool Equals(string? x, string? y) => string.Equals(x, y);

	public override int GetHashCode(string obj)
	{
		ArgumentException.ThrowIfNullOrWhiteSpace(obj);

		return unchecked((int)XxHash32.HashToUInt32(MemoryMarshal.AsBytes<char>(obj)));
	}
}