///
/// Copyright (c) 2016 Sensus Metering Systems
///
using System;
using System.Collections.Generic;
using log4net;
using TBF.Boxes;
using TBF.BenchControl.Keithley.Multimeter_2010_RS232;

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

		readonly TempMeterCfg tempMtrCfg;       /// configuration

        public readonly Multimeter Multimeter;         /// parent component

		public int Channel { get { return tempMtrCfg.Channel; } }		/// 1..5


		/// Dictionaries to maintain separate operations for each FloatBox argument
		Dictionary<DoubleBox, IOperation> operations;
		Dictionary<DoubleBox, IOperation> operations2;


		public TempMeter()
		{
		}

		public TempMeter(Generic.IComponentCfg cfg, IList<Generic.IComponent> components)
			: base(cfg)
		{
			tempMtrCfg = cfg as TempMeterCfg;

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

			operations  = new Dictionary<DoubleBox, IOperation>();
			operations2 = new Dictionary<DoubleBox, IOperation>();

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

        public double ReadTemperature()
        {
			double resistance = Multimeter.ReadResistance(tempMtrCfg.Channel);

			double temperature = 0;
			if (resistance > 0 && resistance < 2000)
			{
                if (tempMtrCfg.UseITS90)
                {
                    temperature = Formulas.PlatinumResistanceTM_ITS90_R2T(resistance,
                                                                          tempMtrCfg.R001C,
                                                                          tempMtrCfg.a7,
                                                                          tempMtrCfg.b7,
                                                                          tempMtrCfg.c7);
                }
                else
                {
                    temperature = Formulas.PlatinumResistanceTM_ITS27_R2T(resistance,
                                                                          tempMtrCfg.R0,
                                                                          tempMtrCfg.A,
                                                                          tempMtrCfg.B);
                }

				log.DebugFormat("Ch = {0}, R = {1} Ohm, T = {2} °C", Channel, resistance.ToString("F3"), temperature.ToString("F3"));
			}

			return temperature;
        }

		/// <summary>
		/// Events:  TempDone, Error
		/// </summary>
		/// <param name="temp">Reference to a variable for the temperature in Celsius</param>
		/// <returns>ReadTempOp instance reference casted to IOperaton</returns>
		public IOperation ReadTempOp(ref DoubleBox temp)
		{
			IOperation operation;
			if (operations.TryGetValue(temp, out operation))
			{
				return operation;		/// Operation already available
			}
			else
			{
				/// Create a new operation and store it in the dictionary
				operation = new ReadTempOp(this, ref temp);
				operations.Add(temp, operation);
				return operation;
			}
		}

		/// <summary>
		/// Events:  tempDone, Error
		/// </summary>
		/// <param name="temp">Reference to a variable for the temperature in Celsius</param>
		/// <param name="tempDone">Event returned when measurement done</param>
		/// <returns>ReadTempOp instance reference casted to IOperaton</returns>
		public IOperation ReadTempOp(ref DoubleBox temp, Event tempDone)
		{
			IOperation operation;
			if (operations2.TryGetValue(temp, out operation))
			{
				return operation;		/// Operation already available
			}
			else
			{
				/// Create a new operation and store it in the dictionary
				operation = new ReadTempOp(this, ref temp, tempDone);
				operations2.Add(temp, operation);
				return operation;
			}
		}
	}
}