using System;
using log4net;

namespace TBF.BenchControl.Elde
{
	public class StartMeasurementOp : IOperation
	{
		private static readonly ILog log = LogManager.GetLogger(typeof(StartMeasurementOp));
        public override string ToString() { return string.Format("StartMeasurementOp(ref={0},pulses={1})", flowMeterIdx, refPulses); }

		/// Set by the constructor
		readonly ControlBoardDev controlBoard;
        readonly int flowMeterIdx;
        readonly int refPulses;                 /// Number of reference pulses for a complete test
        readonly TestMethods testMethod;
        readonly float filterConstant;

        bool started = false;

        /// <summary>
        /// Starts the measurement.
        /// Events:  MeasurementStarted
        /// </summary>
        /// <param name="controlBoardDev">Control board component reference</param>
        /// <param name="flowMeter">Flow meter component reference</param>
        /// <param name="readers">Register readers references</param>
        /// <param name="volume">Water volume for the test in liters</param>
        public StartMeasurementOp(ControlBoardDev controlBoardDev, GenericDevices.IFlowMeter flowMeter,
                                  int refPulses, TestMethods method, float filterConstant)
        {
			if (controlBoardDev == null) throw new ArgumentNullException("controlBoardDev");
			this.controlBoard = controlBoardDev;

            if (flowMeter is Elde.FlowMeter.FlowMeter)
            {
                flowMeterIdx = (flowMeter as Elde.FlowMeter.FlowMeter).Idx1;
            }
            else if (flowMeter is Elde.FlowMeterTwins.FlowMeter)
            {
                flowMeterIdx = 0;
            }
            else
            {
                throw new ArgumentException("flowMeter is null or is not Elde");
            }

            this.refPulses = refPulses;
            this.testMethod = method;
            this.filterConstant = filterConstant;

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

		/// <summary>Start this operation</summary>
		public void Start()
        {
            controlBoard.SendCommand(Command.Start, flowMeterIdx, controlBoard.RRoute, refPulses, testMethod,
                                     filterConstant, 20, 0, StopDevs.None);
        }

		/// <summary>Run this operation</summary>
		/// <returns>
		///		Event.FlowInDone or Event.FlowOutDone
		/// </returns>
		public Event Run()
		{
            if (started) return Event.MeasurementStarted;
            StatusP statusP = controlBoard.StatusP;
            log.DebugFormat("statusP = {0} {1} {2} {3}",
                            (((ulong)statusP >> 48) & 0xFFFF).ToString("X4"),
                            (((ulong)statusP >> 32) & 0xFFFF).ToString("X4"),
                            (((ulong)statusP >> 16) & 0xFFFF).ToString("X4"),
                            ((ulong)statusP & 0xFFFF).ToString("X4"));
            if (0 != (statusP & StatusP.TestInProgress))
            {
                log.Info("Test started");
                started = true;
                return Event.MeasurementStarted;
            }
			return Event.None;
		}

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