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

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

		readonly FlowMeterCfg flowMeterCfg;

        public int Idx1 { get { return flowMeterCfg.Idx1; } }
		
		public readonly ControlBoardDev ControlBoard;

        public float NominalFlow { get { return flowMeterCfg.NominalFlow; } }

        public float LtrPerPulse { get { return flowMeterCfg.NominalFlow / 7200.0f; } }

        public float LtrPerPulseCorrected(double flow)
        {
            if (flow < 0.1 * NominalFlow) return LtrPerPulse;     /// No correction for small flow   
            
            /// Apply correction
            double correctedFlow = BenchControl.Formulas.CorrectedValue(flow, Corrections);
            return (float)(LtrPerPulse * correctedFlow / flow);
        }


		public FlowMeter()
		{
		}

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

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

			/// Prepare data for SendCalibData() control board component method
			if (Idx1 >= ControlBoard.EtCalib.Length) throw new Exception("Flowmeter " + Name + " parameter 'Idx1' is out of range");
			ControlBoard.EtCalib[Idx1] = flowMeterCfg.NominalFlow;

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

		/// <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 FloatBox flow)
		{
			return new ReadFlowOp(this, 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 FloatBox flow, Event flowDone)
		{
			return new ReadFlowOp(this, ref flow, flowDone);
		}
	}
}