///
/// Copyright (c) 2013-2015 Sensus Metering Systems
/// Author: Milan Hanajik
///
using System;
using log4net;

namespace TBF.BenchControl.MettlerToledo.Standard
{
	public class GetBalanceSNOp : IOperation
	{
		private static readonly ILog log = LogManager.GetLogger(typeof(GetBalanceSNOp));
		public override string ToString() { return string.Format("GetBalanceSNOp(.,.)"); }

		/// Set by the constructor
		BalanceNewDev balanceDev;
		string serialNumber;

		/// <summary>
		/// Events:  BalanceDone, Error
		/// </summary>
		/// <param name="balanceDev">Balance device instance</param>
		/// <param name="serialNumber">Reference to the serialNumber</param>
		public GetBalanceSNOp(BalanceNewDev balanceDev, ref string serialNumber)
        {
			if (balanceDev == null) throw new ArgumentNullException("balanceDev");
			this.balanceDev = balanceDev;

			this.serialNumber = serialNumber;

			log.Debug(this.ToString());
        }

		/// <summary>Start this operation</summary>
		public void Start()
        {
			log.DebugFormat("{0} - Start()", balanceDev.Name);
			balanceDev.GetSerialNumber();
		}

		/// <summary>Run this operation</summary>
		/// <returns>
		///		Event.None
		///		Event.BalanceDone
		/// </returns>
		public Event Run()
		{
			if (balanceDev.MsrmntState == MsrmntState.Valid)
			{
				serialNumber = balanceDev.SerialNumber;
				return Event.BalanceDone;													/// S/N read successful
			}
			if (balanceDev.MsrmntState == MsrmntState.Failed) return Event.Error;	/// S/N read failed
			return Event.None;														/// No result yet
		}

		/// <summary>Stop this operation</summary>
		public void Stop()
		{
			log.DebugFormat("{0} - Stop()", balanceDev.Name);
		}
	}
}