namespace UADocExamples.AlarmsAndConditions
{

    class Acknowledge
    {
        public static void Main1()
        {
            // Define which server we will work with.
            UAEndpointDescriptor endpointDescriptor =
                "opc.tcp://141.29.81.224:4840";

            int numevents = 0;

            // Instantiate the client objects
            var client = new EasyUAClient();
            IEasyUAAlarmsAndConditionsClient alarmsAndConditionsClient = client.AsAlarmsAndConditionsClient();

            // To handle more than one event
            List<UANodeId> nodeId = new List<UANodeId>();
            List<byte[]> eventId = new List<byte[]>();

            var anEvent = new ManualResetEvent(initialState: false);

            Console.WriteLine("Subscribing...");
            client.SubscribeEvent(
                endpointDescriptor,
                new UANodeDescriptor("ns=2;s=opcua/events.useralarms"), //user alarms node in SIMOTION
                1000,
                (sender, eventArgs) =>
                {
                    
                    if (!eventArgs.Succeeded)
                    {
                        Console.WriteLine("*** Failure: {0}", eventArgs.ErrorMessageBrief);
                        return;
                    }
                    if (eventArgs.EventData != null)
                    {
                        UABaseEventObject baseEventObject = eventArgs.EventData.BaseEvent;
                        Console.WriteLine(baseEventObject);

                        nodeId.Add(baseEventObject.NodeId); //add the NodeId to the list
                        eventId.Add(baseEventObject.EventId); //add the EventId to the list

                        anEvent.Set();

                        numevents++;
                    }
                },
                state:null);

            Console.WriteLine("Waiting for an event for 30 seconds...");
            if (!anEvent.WaitOne(30*1000))
            {
                Console.WriteLine("Event not received.");
                return;
            }

            Console.WriteLine("Acknowledging all events...");
            try
            {
                for (int i = 0; i < numevents; i++)
                {
                    alarmsAndConditionsClient.Acknowledge(
                        endpointDescriptor,
                        nodeId[i],
                        eventId[i],
                        "Acknowledged by an automated example code."); //comment

                    Console.WriteLine("Acknowledged event = {0}", i);
                }
            }
            catch (UAException uaException)
            {
                Console.WriteLine("*** Failure: {0}", uaException.GetBaseException().Message);
            }

            Console.WriteLine("Waiting for 5 seconds...");
            Thread.Sleep(5 * 1000);

            Console.WriteLine("Unsubscribing...");
            client.UnsubscribeAllMonitoredItems();

            Console.WriteLine("Waiting for 5 seconds...");
            Thread.Sleep(5 * 1000);
        }
    }
}