// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
 
using System.Buffers;
using System.Diagnostics;
using System.Security.Cryptography;
using System.Text;
using System.Text.RegularExpressions;
 
namespace Aspire;
 
internal static partial class InteractionHelpers
{
    // Chosen to balance between being long enough for most normal use but provides a default limit
    // to prevent possible abuse of interactions API.
    public const int DefaultMaxLength = 8000;
 
    [GeneratedRegex("[^a-z0-9]+")]
    private static partial Regex NonAlphanumericRegex();
 
    public static int GetMaxLength(int? configuredInputLength)
    {
        // An unconfigured max length uses the default.
        if (configuredInputLength is null || configuredInputLength == 0)
        {
            return DefaultMaxLength;
        }
 
        return configuredInputLength.Value;
    }
 
    public static string LabelToName(string label)
    {
        ArgumentNullException.ThrowIfNull(label);
 
        var name = label.ToLowerInvariant();
 
        name = NonAlphanumericRegex().Replace(name, "_");
        name = name.Trim('_');
 
        return name;
    }
}