using MQTTnet;
using System.Security.Cryptography.X509Certificates;

namespace RobotNet10.MqttConnection;

public class MQTTClientCertificatesProvider(string? CerPath, string? KeyPath) : IMqttClientCertificatesProvider
{
    public X509CertificateCollection? GetCertificates()
    {
        if (!string.IsNullOrEmpty(CerPath) && !string.IsNullOrEmpty(KeyPath))
        {
                if (File.Exists(CerPath) && File.Exists(KeyPath))
                {
                    var cert = X509Certificate2.CreateFromPem(File.ReadAllText(CerPath), File.ReadAllText(KeyPath));
                    var pfxBytes = cert.Export(X509ContentType.Pfx);
                    var pfxCert = X509CertificateLoader.LoadPkcs12(pfxBytes, "", X509KeyStorageFlags.Exportable | X509KeyStorageFlags.PersistKeySet);
                    return [pfxCert];
                }
        }
        return null;
    }
}