///
/// Copyright (c) 2017 Sensus Slovensko a.s.
///
using System;
using log4net;
using TBF.Boxes;

namespace TBF.BenchControl.Elde
{
	public class ReadFlowOp : IOperation
	{
		private static readonly ILog log = LogManager.GetLogger(typeof(ReadFlowOp));
        public override string ToString() { return string.Format("ReadFlowOp({0},.,.,{1})", flowMeter.Idx1, eventDone); }

		/// Set by the constructor
        readonly GenericDevices.IFlowMeter flowMeter;
		readonly ControlBoardDev controlBoard;
		readonly DoubleBox flowBox;
		readonly Event eventDone;

		/// <summary>
		/// Events:  FlowInDone, FlowOutDone or Error
		/// </summary>
		/// <param name="flowMeter">Flow meter reference</param>
		/// <param name="flowBox">Reference to the measured flow variable, value is in bar</param>
		/// <param name="eventDone">Event to be returned by Run() when completed OK</param>
        public ReadFlowOp(GenericDevices.IFlowMeter flowMeter, ControlBoardDev controlBoard, ref DoubleBox flowBox, Event eventDone)
        {
            if (flowMeter == null || controlBoard == null) throw new ArgumentNullException();

            this.flowMeter = flowMeter;
			this.controlBoard = controlBoard;
			this.eventDone = eventDone;
			this.flowBox = flowBox;

			log.Debug(this.ToString());
        }
        public ReadFlowOp(GenericDevices.IFlowMeter flowMeter, ControlBoardDev controlBoard, ref DoubleBox flowBox)
			: this(flowMeter, controlBoard, ref flowBox, Event.FlowMeasurementDone)
		{
		}

		/// <summary>Start this operation</summary>
		public void Start()
        {
		}

		/// <summary>Run this operation</summary>
		/// <returns>
		///		Event.FlowInDone or Event.FlowOutDone
		/// </returns>
		public Event Run()
		{
			if ((int)(controlBoard.StatusP & StatusP.RefFlowMeterMask) == flowMeter.Idx1)
			{
                flowBox.Val = flowMeter.ReadFlow();
				return eventDone;
			}
			else
			{
				return Event.Error;
			}
		}

		/// <summary>Stop this operation</summary>
		public void Stop()
		{
		}
	}
}