///
/// Copyright (c) 2013-2020 Sensus Slovensko a.s.
///
using System;
using log4net;
using TBF.Rig.GenericDevices;

namespace TBF.Rig.ControlBoard.Legacy
{
	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})", flowMeterNr, totalRefPulses); }

		/// Set by the constructor
		readonly CBoard controlBoard;
		readonly IRegValve regulValve;
        readonly int regulValveNr;
        readonly int regulValveStableTime;
		readonly int flowMeterNr;
        readonly double nominalFlow;
        readonly double maximalFlow;
        readonly double reqFlowLo;
        readonly double reqFlowHi;
		readonly int totalRefPulses;            /// Number of reference pulses for a complete test
        readonly int massRefPulses;             /// Number of reference pulses for mass collection
        readonly int delayBeforeFlowRegulation; /// Delay before flow control starts in seconds
        readonly TestMethods testMethod;
        readonly int diverterNr;

		///
		///  Internal states of this operation
		///
		enum OpState
		{
			StartingTest,
            ResendCommand,
            WaitingBeforeValveMove,
			StartingFlowRegulation,
			OpCompleted,
		}
		OpState opState;


        int delayStartTime;                     /// StateMachine.Time snapshot when delay before flow regulation starts


        /// <summary>
        /// Starts the measurement.
        /// Events:  MeasurementStarted
        /// </summary>
        /// <param name="controlBoard">Control board component reference</param>
		/// <param name="outputPath">Specifies used components</param>
		/// <param name="method">Test method</param>
		/// <param name="totalRefPulses">Test duration in number of reference flowmeter pulses</param>
		/// <param name="filterConstant">Specifies filter for watermeter pulses</param>
        public StartMeasurementOp(CBoard controlBoard, OutputPath outputPath, TestMethods method,
                                  double requiredFlowLo, double requiredFlowHi, int refPulses, int delayBeforeFlowRegulation = 0)
            : this(controlBoard, outputPath, method, requiredFlowLo, requiredFlowHi, refPulses, refPulses, delayBeforeFlowRegulation)
        {
        }

        /// <summary>
        /// Starts the measurement.
        /// Events:  MeasurementStarted
        /// </summary>
        /// <param name="controlBoard">Control board component reference</param>
		/// <param name="outputPath">Specifies used components</param>
		/// <param name="method">Test method</param>
		/// <param name="refPulses">Test duration in number of reference flowmeter pulses</param>
		/// <param name="filterConstant">Specifies filter for watermeter pulses</param>
		public StartMeasurementOp(CBoard controlBoard, OutputPath outputPath, TestMethods method,
                                  double requiredFlowLo, double requiredFlowHi, int totalRefPulses, int massRefPulses, int delayBeforeFlowRegulation = 0)
        {
			if (controlBoard == null) throw new ArgumentNullException("controlBoardDev");
			this.controlBoard = controlBoard;

            if (outputPath.FlowMeter == null) throw new ArgumentNullException("Flow meter is missing");
			flowMeterNr = outputPath.FlowMeter.Idx1;

			this.regulValve = outputPath.RegValve;
            regulValveNr = 0;
            regulValveStableTime = 0;

			if (outputPath.Diverter is TBF.Rig.Uni.Diverter.Diverter)
            {
                diverterNr = (outputPath.Diverter as TBF.Rig.Uni.Diverter.Diverter).DiverterNr;
            }

            nominalFlow = outputPath.FlowMeter.NominalFlow;
            maximalFlow = 1.25 * nominalFlow;

            this.testMethod = method;
            this.reqFlowLo = requiredFlowLo;
			this.reqFlowHi = requiredFlowHi;
            this.totalRefPulses = totalRefPulses;
            this.massRefPulses = massRefPulses;
            this.delayBeforeFlowRegulation = delayBeforeFlowRegulation;

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

        void SendStartCommand()
        {
            controlBoard.SyncRoute();
#if TURA_IPERL || TURA_IPERL_NEW || TURA_SPECIAL || BADGER_VELKA_TRAT || SLM_50
			int flowMeterIdxAndDiv = flowMeterNr + 16 * diverterNr;
#elif BADGER_STREDNA_TRAT
			int flowMeterIdxAndDiv = flowMeterNr + 8 * (diverterNr - 1);
#elif FILIPINY_50
            int flowMeterIdxAndDiv = flowMeterNr + ((flowMeterNr == 3) ? (4 * (diverterNr - 1)) : 0);
#elif GELSENWASSER
            int flowMeterIdxAndDiv = flowMeterNr + ((diverterNr == 2) ? 16 : 0);
#else
            int flowMeterIdxAndDiv = flowMeterNr;
#endif
            log.InfoFormat("Start() : SendCommand(Cmd.Start, {0}, route, {1}, {1}, {2}, Stop.None)",
                            flowMeterIdxAndDiv, totalRefPulses, testMethod);

            controlBoard.SendCommand(Command.Start, flowMeterIdxAndDiv, totalRefPulses, massRefPulses, testMethod, StopDevs.None);
        }

		/// <summary>Start this operation</summary>
		public void Start()
        {
            SendStartCommand();
			opState = OpState.StartingTest;
        }

		/// <summary>Run this operation</summary>
		/// <returns>
		///		Event.FlowInDone or Event.FlowOutDone
		/// </returns>
		public Event Run()
		{
			if (opState == OpState.StartingTest)
			{
				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 ((statusP & StatusP.TestInProgress) != 0)
                {
                    log.Info("Test started");
                    if (delayBeforeFlowRegulation > 0)
                    {
                        delayStartTime = StateMachine.Time;
                        opState = OpState.WaitingBeforeValveMove;
                    }
                    else
                    {
                        opState = OpState.StartingFlowRegulation;
                    }
                }
                else
                {
                    //opState = OpState.ResendCommand;
                }

				return Event.None;
			}
            else if (opState == OpState.ResendCommand)
            {
                SendStartCommand();
                opState = OpState.StartingTest;
                return Event.None;
            }
            else if (opState == OpState.WaitingBeforeValveMove)
            {
                if (StateMachine.Time - delayStartTime >= delayBeforeFlowRegulation)
                {
                    opState = OpState.StartingFlowRegulation;
                }
                return Event.None;
            }
            else if (opState == OpState.StartingFlowRegulation)
            {
                ///
                /// Done once, issues an appropriate ValveMove(...) command
                ///
                if ((reqFlowLo >= reqFlowHi) || (reqFlowLo > maximalFlow) || (reqFlowHi <= 0))
                {
                    return Event.OpArgumentError;
                }

                log.InfoFormat("Run(): rv#={0} flowMtr#={1} TARGET: flowLo={2} flowHi={3}",
                                regulValveNr, flowMeterNr, reqFlowLo, reqFlowHi);

                double freqLo = 2000.0 * reqFlowLo / nominalFlow;
                double freqHi = 2000.0 * reqFlowHi / nominalFlow;
                if (regulValve.IsCoax)
                {
                    controlBoard.ValveMove(regulValveNr, RegulValveMode.TargetFrequency,
                                           new double[2] { (freqLo + freqHi) / 2, (freqLo + freqHi) / 2 },
                                           regulValveStableTime);
                }
                else
                {
                    controlBoard.ValveMove(regulValveNr, RegulValveMode.TargetFrequency,
                                           new double[2] { freqLo, freqHi },
                                           regulValveStableTime);
                }

                opState = OpState.OpCompleted;
                return Event.None;
            }
            else if (opState == OpState.OpCompleted)
            {
                return Event.TestInProgress;
            }

			return Event.None;
		}

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