///
/// Copyright (c) 2013-2020 Sensus Slovensko a.s.
///
using System;
using System.Collections.Generic;
using log4net;
using TBF.BenchControl;
using TBF.BenchControl.ControlBoard.Legacy;
using TBF.Boxes;

namespace TBF.BenchControl.Elde.FlowMeterTwins
{
	public class FlowMeter : ComponentBase, GenericDevices.IFlowMeter
	{
		private static readonly ILog log = LogManager.GetLogger(typeof(FlowMeter));
        public override string ToString() { return string.Format("FlowMeterTwins({0})", Cfg.ToString(1)); }

		readonly FlowMeterCfg flowMeterCfg;
        readonly ControlBoardDev controlBoard;
        public readonly Elde.FlowMeter.FlowMeter FlowMeter1;
        public readonly Elde.FlowMeter.FlowMeter FlowMeter2;

        public int Idx1 { get { return 0; } }
        public double NominalFlow { get { return flowMeterCfg.NominalFlow; } }

        /// The nominal flowed of a pair of flow meters is reached at 4000Hz
        public double LtrPerPulse { get { return flowMeterCfg.NominalFlow / 14400.0; } }

        /// Calculates the average of values of two flowmeters. Assumes the flow is divided evenly. 
        public double LtrPerPulseCorrected(double flow, int rangeIx)
        {
            double flow2 = flow / 2.0;
            return (FlowMeter1.LtrPerPulseCorrected(flow2, rangeIx) + FlowMeter2.LtrPerPulseCorrected(flow2, rangeIx)) / 2;
        }
        

        public FlowMeter()
		{
		}

		public FlowMeter(Generic.IComponentCfg cfg, IList<Generic.IComponent> components)
            : base(cfg)
		{
			flowMeterCfg = cfg as FlowMeterCfg;

			controlBoard = (ControlBoardDev)TbfComponents.FindComponent(cfg.ParentName, components);
			if (controlBoard == null) throw new Exception("Cannot find " + Name + " parent");

            FlowMeter1 = TbfComponents.FindComponent(flowMeterCfg.FlowMeter1, components) as Elde.FlowMeter.FlowMeter;
            if (FlowMeter1 == null) throw new Exception("Cannot find FlowMeter1 component");

            FlowMeter2 = TbfComponents.FindComponent(flowMeterCfg.FlowMeter2, components) as Elde.FlowMeter.FlowMeter;
            if (FlowMeter2 == null) throw new Exception("Cannot find FlowMeter2 component");

            controlBoard.EtCalib[Idx1] = (float)flowMeterCfg.NominalFlow;		/// Idx1==0 for FlowMeterTwins

			/// Prepare data for SendCalibData() control board component method

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

        public double ReadFlow()      { return controlBoard.RefFlow; }
        public double ReadFrequency() { return controlBoard.RefFrequency; }

		/// <summary>
		/// Events:  FlowDone, Error
		/// </summary>
		/// <param name="flow">Reference to a variable for the flow in Bar</param>
		/// <returns>ReadFlowOp instance reference casted to IOperaton</returns>
		public IOperation ReadFlowOp(ref DoubleBox flow)
		{
			return new ReadFlowOp(this, controlBoard, ref flow);
		}

		/// <summary>
		/// Events:  flowDone, Error
		/// </summary>
		/// <param name="flow">Reference to a variable for the flow in Bar</param>
		/// <param name="flowDone">Event returned when measurement done</param>
		/// <returns>ReadFlowOp instance reference casted to IOperaton</returns>
		public IOperation ReadFlowOp(ref DoubleBox flow, Event flowDone)
		{
            return new ReadFlowOp(this, controlBoard, ref flow, flowDone);
		}
	}
}