///
/// Copyright (c) 2013-2015 Sensus Metering Systems
///
using System;
using log4net;
using TBF.Boxes;

namespace TBF.BenchControl.Elde.PressureMeter
{
	public class ReadPressureOp : IOperation
	{
		private static readonly ILog log = LogManager.GetLogger(typeof(ReadPressureOp));
		public override string ToString() { return string.Format("ReadPressureOp(.,{0},{1},.)", eventDone, pressureMeter.Idx0); }

		/// Set by the constructor
        readonly PressureMeter pressureMeter;
		readonly Event eventDone;

        /// Measured value
        FloatBox pressure;

		/// <summary>
		/// Events:  PressureInDone, PressureOutDone or Error
		/// </summary>
		/// <param name="pressureMeter">Pressure meter reference</param>
		/// <param name="pressure">Reference to the measured pressure variable, value is in bar</param>
		/// <param name="eventDone">Event to be returned by Run() when completed OK</param>
		public ReadPressureOp(PressureMeter pressureMeter, ref FloatBox pressure, Event eventDone)
        {
			if (pressureMeter == null) throw new ArgumentNullException("pressureMeter");
            this.pressureMeter = pressureMeter;
            this.pressure = pressure;
            this.eventDone = eventDone;

			log.Debug(this.ToString());
        }
        public ReadPressureOp(PressureMeter pressureMeter, ref FloatBox pressure)
			: this(pressureMeter, ref pressure, Event.PressureDone)
		{
		}


		/// <summary>Start this operation</summary>
		public void Start()
        {
            pressure.Val = pressureMeter.ReadPressure();
        }

		/// <summary>Run this operation</summary>
		/// <returns>
		///		Event.PressureInDone or Event.PressureOutDone
		/// </returns>
		public Event Run()
		{
            pressure.Val = pressureMeter.ReadPressure();
			return eventDone;
		}

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