///
/// Copyright (c) 2017 Sensus Metering Systems
///
using System;
using System.Collections.Generic;
using System.Text;
using log4net;
using Config.Entities;

namespace TBF.BenchControl.Network.Camera.RoiForFixedStart
{
	public class Roi : ComponentBase, GenericDevices.IRoiForFixedStart, IOperation
	{
		/// TODO: Implement support for sharing one camera by multiple ROI-s

		private static readonly ILog log = LogManager.GetLogger(typeof(Roi));
		public override string ToString()
		{
			return string.Format("{0}({1})", this.GetType().Namespace.Substring(17), Cfg.ToString(1));
		}

		///
		/// Cfg 
		///
		readonly RoiCfg roiCfg;

		///
		/// Camera and ICamera 
		///
		public readonly CLP1611.Camera NetCamera;
		public GenericDevices.ICamera Camera { get { return NetCamera as GenericDevices.ICamera; } }

        public Config.Entities.RegisterReaderType RegisterReaderType { get { return Config.Entities.RegisterReaderType.Manual; } }
        public double PulsesPerLtr { get { return roiCfg.ProcParams.PulsesPerLtr; } }
		public double LtrsPerPulse { get { return (PulsesPerLtr <= float.Epsilon) ? 1.0 : (1 / PulsesPerLtr); } }


		double beginWMState;
		public double BeginWMState
		{
			get { return beginWMState; }
			set { beginWMState = value; }
		}

		double endWMState;
		public double EndWMState
		{
			get { return endWMState; }
			set { endWMState = value; }
		}

		public double WMVolume { get { return endWMState - beginWMState; } }

		public int WMPulses { get { return (int)(WMVolume / LtrsPerPulse); } }

		int wmRefPulses;
		public int WMRefPulses { get { return wmRefPulses; } }


		public Roi()
		{
		}

		public Roi(Generic.IComponentCfg cfg, IList<Generic.IComponent> components)
            : base(cfg)
        {
			roiCfg = cfg as RoiCfg;
			NetCamera = TbfComponents.FindComponent(cfg.ParentName, components) as CLP1611.Camera;

			Clear();

			StartChangeHandler();

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


        #region Configuration Change Handling

        public static void OnCfgChange(object sender, CfgChangeArgs args)
        {
            if (CfgChangeHandler == null) return;
            try { CfgChangeHandler(sender, args); }
            catch (Exception e) { log.Error("CfgChangeHandler(...) failed", e); }
        }

        public static event EventHandler<CfgChangeArgs> CfgChangeHandler;

        public override void StartChangeHandler()
        {
            CfgChangeHandler += delegate(object sender, CfgChangeArgs args)
            {
                RoiCfg tmpcfg = args.Cfg as RoiCfg;
                if (tmpcfg != null && tmpcfg.Name.Equals(Name))
                {
                    if (args.Command == CfgChangeCmd.CfgChange)
                    {
						roiCfg.BlackAndWhite = tmpcfg.BlackAndWhite;
						roiCfg.LowResolution = tmpcfg.LowResolution;
						roiCfg.ImageRotation = tmpcfg.ImageRotation;
					}
                }
            };
        }

        #endregion Configuration Change Handling

		public void Clear()
		{
			log.DebugFormat("{0}:Clear()", Name);
			beginWMState = 0;
			endWMState = 0;
			wmRefPulses = 0;
		}

		public void TestCompleted()
		{
			log.DebugFormat("{0}:TestCompleted()", Name);
			ReadPulses();
		}

		private void ReadPulses()
		{
			wmRefPulses = (int)StateMachine.ControlBoard.EtPulses(0);
		}


		public IOperation GrabImageOp(string imageFileName)
		{
			return GrabImageOp(imageFileName, roiCfg.BlackAndWhite, roiCfg.LowResolution, roiCfg.ImageRotation);
		}

		public IOperation GrabImageOp(string imageFileName,
                                      bool blackAndWhite, bool lowResolution, Config.Entities.ImageRotation imageRotation)
		{
			if (NetCamera != null)
			{
				/// TODO: Implement support for sharing one camera by multiple ROI-s
				return NetCamera.GrabImagesOp(new string[] { imageFileName }, blackAndWhite, lowResolution, imageRotation);
			}
			else
				return null;
		}


		/// <summary>
		/// Events:  Event.ReadRegisterDone
		/// </summary>
		/// <returns>ReadWaterMeter instance reference casted to IOperaton</returns>
		public IOperation ReadRegisterOp()
		{
			return this;
		}

		/// <summary>Start this operation</summary>
		public void Start()
		{
			ReadPulses();
		}

		/// <summary>Run this operation</summary>
		/// <returns>eventDone</returns>
		public Event Run()
		{
			ReadPulses();
			return Event.ReadRegisterDone;
		}

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