using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;
using System.Threading;

using OpcLabs.EasyOpc;
using OpcLabs.EasyOpc.DataAccess;

namespace ConsoleApplication1
{
    class Program
    {
        static string filePath;
        static ulong counter = 0;	// Counter how many times EasyDAclient has been instantiated

        static void Main(string[] args)
        {
            filePath = Environment.GetFolderPath(Environment.SpecialFolder.CommonApplicationData);	// Get file path to C:\ProgramData\
            filePath = filePath + @"\Counter.txt";

            ServerDescriptor server = new ServerDescriptor("", "OPCLabs.KitServer.2");
            DAItemDescriptor item = new DAItemDescriptor("Demo.Ramp");

            EasyDAClient.SharedParameters.Topic.SlowdownWeight = 0.0f;
            EasyDAClient.SharedParameters.Topic.SpeedupWeight = 0.0f;

            while (true)
            {
                EasyDAClient client = new EasyDAClient();
                client.InstanceParameters.UpdateRates.ReadAutomatic = Timeout.Infinite;
                client.InstanceParameters.UpdateRates.WriteAutomatic = Timeout.Infinite;

                counter++;	// Count how many times EasyDAClient has been instantiated
                Write();	// Write counter to file

                DAVtq vtq = client.ReadItem(server, item);
                Console.WriteLine("{0}   {1}   {2}", vtq.Timestamp.ToString("yyyy:mm:dd HH:MM:ss.fff"), vtq.Value, vtq.Quality.QualityChoiceBitField);

                client.Dispose();
                Thread.Sleep(500);
            }
        }

        static void Write()
        {
            try
            {
                StreamWriter sw = new StreamWriter(filePath);
                sw.WriteLine("{0}\t\t{1}", DateTime.Now.ToString("yyyy:mm:dd HH:MM:ss.fff"), counter);
                sw.Close();
            }
            catch
            {
                // Ignore exception. Couldn't write to file.
            }
        }
    }
}