using System.Security.Cryptography;
using AuditPackRecord = StellaOps.AuditPack.Models.AuditPack;

namespace StellaOps.AuditPack.Services;

public sealed partial class AuditPackBuilder
{
    private static AuditPackRecord WithDigest(AuditPackRecord pack)
    {
        var json = CanonicalJson.Serialize(pack with { PackDigest = null, Signature = null });
        var digest = ComputeDigest(json);
        return pack with { PackDigest = digest };
    }

    private static string ComputeDigest(byte[] content)
    {
        var hash = SHA256.HashData(content);
        return Convert.ToHexString(hash).ToLowerInvariant();
    }
}