// This example shows how to subscribe to changes of a monitored item with absolute deadband.

using System;
using OpcLabs.EasyOpc.UA;
using OpcLabs.EasyOpc.UA.OperationModel;

namespace UADocExamples._EasyUAClient
{
    partial class SubscribeDataChange
    {
        public static void AbsoluteDeadband()
        {
            UAEndpointDescriptor endpointDescriptor =
                "opc.tcp://opcua.demo-this.com:51210/UA/SampleServer";
            // or "http://opcua.demo-this.com:51211/UA/SampleServer" (currently not supported)
            // or "https://opcua.demo-this.com:51212/UA/SampleServer/"

            // Instantiate the client object and hook events
            var client = new EasyUAClient();
            client.DataChangeNotification += client_DataChangeNotification_AbsoluteDeadband;

            const double absoluteDeadband = 50;
            Console.WriteLine($"Subscribing with absolute deadband {absoluteDeadband}...");
            // The UADataChangeFilter has an implicit conversion from Double, which creates a filter with the specified
            // absolute deadband.
            client.SubscribeDataChange(endpointDescriptor, 
                "nsu=http://test.org/UA/Data/ ;i=11194",    // /Data.Dynamic.AnalogScalar.Int32Value
                samplingInterval:1000, 
                dataChangeFilter: absoluteDeadband);

            Console.WriteLine("Processing data change events for 20 seconds...");
            System.Threading.Thread.Sleep(20 * 1000);

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

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

        static void client_DataChangeNotification_AbsoluteDeadband(object sender, EasyUADataChangeNotificationEventArgs e)
        {
            // Display value
            if (e.Succeeded)
                Console.WriteLine("Value: {0}", e.AttributeData.Value);
            else
                Console.WriteLine("*** Failure: {0}", e.ErrorMessageBrief);
        }
    }
}

// This example shows how to subscribe to changes of multiple monitored items with absolute deadband.

using System;
using OpcLabs.EasyOpc.UA;
using OpcLabs.EasyOpc.UA.OperationModel;

namespace UADocExamples._EasyUAClient
{
    partial class SubscribeMultipleMonitoredItems
    {
        public static void AbsoluteDeadband()
        {
            UAEndpointDescriptor endpointDescriptor =
                "opc.tcp://opcua.demo-this.com:51210/UA/SampleServer";
            // or "http://opcua.demo-this.com:51211/UA/SampleServer" (currently not supported)
            // or "https://opcua.demo-this.com:51212/UA/SampleServer/"

            // Instantiate the client object and hook events
            var client = new EasyUAClient();
            client.DataChangeNotification += client_DataChangeNotification_AbsoluteDeadband;

            Console.WriteLine("Subscribing with different absolute deadbands...");
            // The UADataChangeFilter has an implicit conversion from Double, which creates a filter with the specified
            // absolute deadband.
            client.SubscribeMultipleMonitoredItems(new[]
                {
                    new EasyUAMonitoredItemArguments(null, endpointDescriptor,
                        "nsu=http://test.org/UA/Data/ ;i=11194",    // /Data.Dynamic.AnalogScalar.Int32Value
                        new UAMonitoringParameters(samplingInterval:100, dataChangeFilter:50)),
                    new EasyUAMonitoredItemArguments(null, endpointDescriptor,
                        "nsu=http://test.org/UA/Data/ ;i=11218",    // /Data.Dynamic.AnalogScalar.FloatValue
                        new UAMonitoringParameters(samplingInterval:100, dataChangeFilter:20))
                });

            Console.WriteLine("Processing monitored item changed events for 10 seconds...");
            System.Threading.Thread.Sleep(10 * 1000);

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

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

        static void client_DataChangeNotification_AbsoluteDeadband(object sender, EasyUADataChangeNotificationEventArgs e)
        {
            // Display value
            if (e.Succeeded)
                Console.WriteLine("{0}: {1}", e.Arguments.NodeDescriptor, e.AttributeData.Value);
            else
                Console.WriteLine("{0} *** Failure: {1}", e.Arguments.NodeDescriptor, e.ErrorMessageBrief);
        }
    }
}

// Shows how to observe OPC UA data changes with a specified absolute deadband.

using OpcLabs.EasyOpc.UA.Reactive;
using System;
using System.Threading;
using OpcLabs.EasyOpc.UA;
using OpcLabs.EasyOpc.UA.OperationModel;

namespace ReactiveDocExamples
{
    namespace _UADataChangeNotificationObservable
    {
        partial class Subscribe
        {
            public static void AbsoluteDeadband()
            {
                // Define which server we will work with.
                UAEndpointDescriptor endpointDescriptor =
                    "opc.tcp://opcua.demo-this.com:51210/UA/SampleServer";
                // or "http://opcua.demo-this.com:51211/UA/SampleServer" (currently not supported)
                // or "https://opcua.demo-this.com:51212/UA/SampleServer/"

                const double absoluteDeadband = 50;
                Console.WriteLine($"Creating observable with absolute deadband {absoluteDeadband}...");
                var attributeArguments = new UAAttributeArguments(
                    endpointDescriptor,
                    "nsu=http://test.org/UA/Data/ ;i=11194");    // /Data.Dynamic.AnalogScalar.Int32Value
                var monitoredItemArguments = new UAMonitoredItemArguments(
                    attributeArguments,
                    new UAMonitoringParameters(samplingInterval: 1000, dataChangeFilter: absoluteDeadband));
                UADataChangeNotificationObservable<int> observable =
                    UADataChangeNotificationObservable.Create<int>(monitoredItemArguments);

                Console.WriteLine("Subscribing...");
                using (observable.Subscribe(e => Console.WriteLine(
                    (e.Exception is null) ? e.AttributeData.ToString() : e.Exception.GetBaseException().ToString())))
                {
                    Console.WriteLine("Waiting for 10 seconds...");
                    Thread.Sleep(10*1000);

                    Console.WriteLine("Unsubscribing...");
                }

                Console.WriteLine("Waiting for 2 seconds...");
                Thread.Sleep(2 * 1000);
            }
        }
    }
}