///
/// Copyright (c) 2013-2018 Sensus Slovensko a.s.
///
using System;
using System.Collections.Generic;
using log4net;
using Config.Entities;
using TBF.Boxes;
using TBF.Resources;

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

		readonly FlowMeterCfg flowMeterCfg;
        readonly ControlBoardDev controlBoard;

        public int Idx1 { get { return flowMeterCfg.Idx1; } }
        public double NominalFlow { get { return flowMeterCfg.NominalFlow; } }
        public double LtrPerPulse { get { return flowMeterCfg.NominalFlow / 7200.0; } } /// Nominal frequency is 2000 Hz

        public double LtrPerPulseCorrected(double flow, int rangeIx)
        {
            if (flow == 0) return LtrPerPulse;      /// To avoid division by zero

            /// Apply correction
            var rangeCorrections = new List<MeasurementCorrection>();
            foreach (var corr in Corrections)
            {
                if (corr.RangeIx == rangeIx) rangeCorrections.Add(corr);
            }
            double correctedFlow = MeasurementCorrection.CorrectedValue(flow, rangeCorrections);
            return (LtrPerPulse * correctedFlow / flow);
        }


        public bool RangeEnabled(int ix) { return flowMeterCfg.RangeEnabled(ix); }
        public double GetTempLo(int ix) { return flowMeterCfg.GetTempLo(ix); }
        public double GetTempHi(int ix) { return flowMeterCfg.GetTempHi(ix); }
        public double GetPressLo(int ix) { return flowMeterCfg.GetPressLo(ix); }
        public double GetPressHi(int ix) { return flowMeterCfg.GetPressHi(ix); }


		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");

			/// Prepare data for SendCalibData() control board component method
            if (Idx1 < controlBoard.EtCalib.Length)
            {
                controlBoard.EtCalib[Idx1] = (float)flowMeterCfg.NominalFlow;
            }
		}

        ///
        /// IDevice interface functions
        ///
        public override void Initialize()
        {
            for (int r = 0; r <= 5; r++)
            {
                if (RangeEnabled(r) && flowMeterCfg.GetCalibValidDate(r) != DateTime.MinValue
                                    && flowMeterCfg.GetCalibValidDate(r).Date < DateTime.Now.Date)
                {
                    throw new Exception(string.Format("{0}/r{1}: {2}", Name, r, Strings.Calibration_certificate_validity_expired));
                }
            }

            log.FatalFormat("{0} initialized: {1}", Name, this);
        }

        public void RunDeviceBefore() { }
        public void RunDeviceAfter() { }
        public void StopDevice() { }
        public void StopDevice2() { }

        /// 
        /// Calendar support
        ///
        public IList<Config.CalendarEvent.ICalendarEvent> GetCalendarEvents()
        {
            DateTime calibrationDue = flowMeterCfg.CalibValidDate;
            IList<Config.CalendarEvent.ICalendarEvent> calendarEvents = new List<Config.CalendarEvent.ICalendarEvent>();

            if (calibrationDue > TBF.UI.Constants.MinDate)
            {
                /// Calibration due date calendar event
                calendarEvents.Add(new TBF.UI.Calendar.CalibrationDueDateEvent(calibrationDue.Date, Name,
                                                                               string.Format(Strings.Calibration_due_date_is_0,
                                                                                             calibrationDue.Date.ToString(TBF.UI.Constants.DateFormat))));
                if (DateTime.Now.Date <= calibrationDue.AddDays(-7))
                {
                    /// Weekly reminders (last 5 weeks)
                    calendarEvents.Add(new TBF.UI.Calendar.CalibrationReminderEvent(calibrationDue.Date.AddDays(-35), Name,
                                                                                    string.Format(Strings.Calibration_due_date_is_0,
                                                                                                  calibrationDue.Date.ToString(TBF.UI.Constants.DateFormat)),
                                                                                    false));
                }
                if (DateTime.Now.Date <= calibrationDue.Date)
                {
                    /// Daily reminders (last 5 days)
                    calendarEvents.Add(new TBF.UI.Calendar.CalibrationReminderEvent(calibrationDue.AddDays(-5), Name,
                                                                                    string.Format(Strings.Calibration_due_date_is_0,
                                                                                                  calibrationDue.Date.ToString(TBF.UI.Constants.DateFormat)),
                                                                                    true));
                }
            }
            return calendarEvents;
        }


        public double ReadFlow()      { return controlBoard.ReferenceFlow; }
        public double ReadFrequency() { return controlBoard.ReferenceFreq; }

		/// <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);
		}
	}
}