///
/// Copyright (c) 2017-2021 Sensus Metering Systems
///
using System;
using System.Collections.Generic;
using System.Text;
using log4net;
using Common;
using Config.Entities;
using NHibernate.Util;
using TBF.Rig.Generic;
using TBF.Rig.GenericDevices;

namespace TBF.Rig.Network.Camera.RoiForFixedStartKeyence
{
	public class Roi : ComponentBase, GenericDevices.IRegReaderStillCamera
	{
		/// 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})", ClassName, Cfg.ToString(-1)); }

		readonly RoiCfg roiCfg;

		///
		/// Camera and ICamera 
		///
		public readonly KeyenceIV3G120.Camera FtpCamera;
		public GenericDevices.ICamera Camera { get { return FtpCamera as GenericDevices.ICamera; } }

        public int Position
        {
            get
            {
                int firstDigitPos = Name.IndexOfAny(new char[] { '1', '2', '3', '4', '5', '6', '7', '8', '9', '0' });
                int position;
                return (firstDigitPos < 0) ? 0 : (int.TryParse(Name.Substring(firstDigitPos), out position) ? position : 0);
            }
        }
        public RegisterReaderType RegisterReaderType { get { return RegisterReaderType.Manual; } }
        public double PulsesPerLtr
        {
            get { return roiCfg.ProcParams.PulsesPerLtr; }
            set { roiCfg.ProcParams.PulsesPerLtr = value; }
        }
        public double LtrsPerPulse { get { return (PulsesPerLtr <= float.Epsilon) ? 1.0 : (1 / PulsesPerLtr); } }
        public string QuantityUnits { get; set; }


        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); } }

        public int WMRefPulses { get { return StateMachine.ControlBoardMain.RefPulses; ; } }


		public Roi() { }

		public Roi(Generic.IComponentCfg cfg, IList<Generic.IComponent> components)
            : base(cfg)
        {
			roiCfg = cfg as RoiCfg;
			FtpCamera = TbfComponents.FindComponent(cfg.ParentName, components) as KeyenceIV3G120.Camera;
            log.Warn(this.ToString());
		}

        public override void Initialize()
        {
            Clear();
        }

        #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.TriggerName = tmpcfg.TriggerName;
					}
                }
            };
        }

        #endregion Configuration Change Handling

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

		public static IValve Valve(string name)
		{
			/// Load the list of components from the database
			var session = TBF.DB.CreateSession(DBKind.Config);
			var cmptnEntities = session.QueryOver<Component>().OrderBy(x => x.ItemNr).Asc.List();
			IList<IComponent> TbfComponents = Rig.TbfComponents.LoadComponentsFromDB(cmptnEntities);

			IList<IValve> valves = Rig.BuiltIn.ValveBase.AllValves(TbfComponents);
			if (valves.Count == 0)
			{
				return null;
			}

			foreach (var valve in valves)
			{
				if (valve.Name == name)
				{
					return valve;
				}
			}
			return valves[0];
		}

		public IOperation GrabImageOp(string imageFileName)	
		{
			return GrabImageOp(imageFileName, true, true, ImageRotation.None);
		}

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

		public IValve GetValve()
		{
			if (roiCfg?.TriggerName != null)
			{
				IValve valve = Valve(roiCfg.TriggerName);
				if (valve != null)
				{
					return valve;
				}
			}

			return null;
		}
	}
}