// Shows how to assure presence of the own application certificate, and display its thumbprint.
//
// Find all latest examples here: https://opclabs.doc-that.com/files/onlinedocs/OPCLabs-OpcStudio/Latest/examples.html .
// OPC client and subscriber examples in C# on GitHub: https://github.com/OPCLabs/Examples-QuickOPC-CSharp .
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using System;
using OpcLabs.BaseLib.Security.Cryptography.PkiCertificates;
using OpcLabs.EasyOpc.UA.Application;
using OpcLabs.EasyOpc.UA.Application.Extensions;
using OpcLabs.EasyOpc.UA.OperationModel;

namespace UADocExamples.Application._IEasyUAClientServerApplication
{
    class AssureOwnCertificate
    {
        public static void Main1()
        {
            // Obtain the application interface.
            EasyUAApplication application = EasyUAApplication.Instance;
            
            try
            {
                Console.WriteLine("Assuring presence of the own application certificate...");
                bool created = application.AssureOwnCertificate();

                Console.WriteLine(created
                    ? "A new certificate has been created."
                    : "An existing certificate has been found.");

                Console.WriteLine();
                Console.WriteLine("Finding the current application certificate...");
                IPkiCertificate pkiCertificate = application.FindOwnCertificate();

                Console.WriteLine();
                Console.WriteLine($"The thumbprint of the current application certificate is: {pkiCertificate?.Thumbprint}");
            }
            catch (UAException uaException)
            {
                Console.WriteLine("*** Failure: {0}", uaException.GetBaseException().Message);
                return;
            }
        }
    }
}