///
/// Copyright (c) 2017-2022 Sensus Slovensko a.s.
///
using System;
using System.Collections.Generic;
using log4net;
using Common;
using TBF.Rig.GenericDevices;

namespace TBF.Rig.DataEntry.StandardCamera
{
	public class EntryForm : ComponentBase, IOperation, IDataEntryForCamera, IHasWMStatesForm, IHasCycleBeginForm, IHasCycleEndForm
	{
        private static readonly ILog log = LogManager.GetLogger(typeof(EntryForm));
        public override string ToString() { return string.Format("{0}({1})", ClassName, Cfg.ToString(-1)); }

        const string DfltOcrWorkspaceFolder = "C:\\TBF\\OCR\\";
        const string DfltOcrWorkspaceExt = ".vrws";

        static Dictionary<string, OcrVidi> ocrDictionary = new Dictionary<string, OcrVidi>();


        readonly EntryFormCfg entryFormCfg;

        public string OcrWorkspace
        {
            get { return (entryFormCfg != null && entryFormCfg.ProcParams != null) ? entryFormCfg.ProcParams.OcrWorkspace : string.Empty; }
        }

        public string OcrStream
        {
            get { return (entryFormCfg != null && entryFormCfg.ProcParams != null) ? entryFormCfg.ProcParams.OcrStream : string.Empty; }
        }

		IRegReader[] regReaders;


		public string[] StartImages
		{
			get { return startImages; }
			set
            {
                if (entryFormCfg.DebugLevel == DebugMode.Simulate)
                {
                    startImages = new string[] {             "C:\\TBF\\Images\\Test\\Image1.jpg", "C:\\TBF\\Images\\Test\\Image2.jpg",
                        "C:\\TBF\\Images\\Test\\Image3.jpg", "C:\\TBF\\Images\\Test\\Image4.jpg", "C:\\TBF\\Images\\Test\\Image5.jpg",
                        "C:\\TBF\\Images\\Test\\Image1.jpg", "C:\\TBF\\Images\\Test\\Image2.jpg", "C:\\TBF\\Images\\Test\\Image3.jpg",
                        "C:\\TBF\\Images\\Test\\Image4.jpg", "C:\\TBF\\Images\\Test\\Image5.jpg", "C:\\TBF\\Images\\Test\\Image1.jpg",
                        "C:\\TBF\\Images\\Test\\Image2.jpg", "C:\\TBF\\Images\\Test\\Image3.jpg", "C:\\TBF\\Images\\Test\\Image4.jpg",
                        "C:\\TBF\\Images\\Test\\Image5.jpg", "C:\\TBF\\Images\\Test\\Image1.jpg", "C:\\TBF\\Images\\Test\\Image2.jpg",
                        "C:\\TBF\\Images\\Test\\Image3.jpg", "C:\\TBF\\Images\\Test\\Image4.jpg", "C:\\TBF\\Images\\Test\\Image5.jpg" };  
                }
                else
                {
                    startImages = value;
                }
            }
		}
		string[] startImages;

		public string[] EndImages
		{
			get { return endImages; }
			set { endImages = value; }
		}
		string[] endImages;

		public bool SaveImages
		{
			get { return entryFormCfg.SaveImages; }
		}


		/// <summary>
		/// Properties set by the Begin, End and WMStates form
		/// </summary>
		bool[] disabled;				/// This array is shared between forms

		string[] wmCycleEndState;
		public string WMCycleEndState(int wmNr) { return (wmNr >= 0 && wmNr < wmCycleEndState.Length) ? wmCycleEndState[wmNr] : string.Empty; }

		double[] wmStartState;

		public double WMStartState(int wmNr)
		{
			bool real = (wmNr >= 0 && wmNr < wmStartState.Length);
			log.DebugFormat("WMEndState, wmNr:{0}, wmEndState real: {1}, wmEndState[wmNr]: {2} ",wmNr,real, real ? wmStartState[wmNr] : 0);
			return real ? wmStartState[wmNr] : 0;
		}

		double[] wmEndState;

		public double WMEndState(int wmNr)
		{
			bool real = (wmNr >= 0 && wmNr < wmEndState.Length);
			log.DebugFormat("WMEndState, wmNr:{0}, wmEndState real: {1}, wmEndState[wmNr]: {2} ",wmNr,real, real ? wmEndState[wmNr] : 0);
			return real ? wmEndState[wmNr] : 0;
		}

		string[] wmStartStateStr;
		

        System.Windows.Forms.Form modelessDlg;
        public bool Completed { get { return (modelessDlg is IHasCompleted) ? (modelessDlg as IHasCompleted).Completed : true; } }

		double refVolume;
		double errLimLo;
		double errLimHi;

		bool resultSaved;								/// Set in Run() when results are saved

		IList<Results.Entities.WaterMeter> waterMeters;		/// Reference to ...ProcessData.BatchRslts.WaterMeters[]

        public string TestStartImgName(int wmNr0, string testName)
        {
            if (waterMeters == null || wmNr0 < 0 || wmNr0 >= waterMeters.Count) return string.Empty;

            return string.Format("{0}-start.bmp", testName);
        }

        public string TestEndImgName(int wmNr0, string testName)
        {
            if (waterMeters == null || wmNr0 < 0 || wmNr0 >= waterMeters.Count) return string.Empty;

            return string.Format("{0}-end.bmp", testName);
        }

        public enum CurrentOp
		{
			None,
			ShowFormAtCycleBeginning,
			ShowFormAtCycleEnd,
			TestStartStates,
			TestEndStates,
			DeferredTestEval,
		}

		CurrentOp currentOp;

		public EntryForm() { }

		public EntryForm(Generic.IComponentCfg cfg)
			: base(cfg)
		{
			entryFormCfg = cfg as EntryFormCfg;
        }

        public override void Initialize()
        {
            disabled = new bool[TBF.Data.WMsCount];
            wmStartState = new double[TBF.Data.WMsCount];
            wmStartStateStr = new string[TBF.Data.WMsCount];
            wmEndState = new double[TBF.Data.WMsCount];
            wmCycleEndState = new string[TBF.Data.WMsCount];
            currentOp = CurrentOp.None;
            log.FatalFormat("{0} initialized: {1}", Name, this);
        }


		/// <returns>Reference to the operation</returns>
		public IOperation ShowCycleBeginFormOp()
		{
			if (currentOp != CurrentOp.None) throw new Exception("Sequence error");
			currentOp = CurrentOp.ShowFormAtCycleBeginning;
			this.waterMeters = TBF.Rig.Sequences.ProcessData.BatchRslts.Batch.WaterMeters;
			return this;
		}

		/// <returns>Reference to the operation</returns>
        public IOperation ShowCycleEndFormOp(IList<Results.Entities.WaterMeter> waterMeters)
		{
			if (currentOp != CurrentOp.None) throw new Exception("Sequence error");
			currentOp = CurrentOp.ShowFormAtCycleEnd;
			this.waterMeters = waterMeters;
			return this;
		}

        /// <returns>Reference to the operation</returns>
        public IOperation ShowTestStartFormOp(IRegReader[] regReaders)
        {
			if (currentOp != CurrentOp.None) throw new Exception("Sequence error");
			currentOp = CurrentOp.TestStartStates;
			this.regReaders = regReaders;
			return this;
		}

        /// <returns>null (not implemented)</returns>
        public IOperation ShowAdvancedTestStartFormOp(IRegReader[] regReaders, IList<Results.Entities.WaterMeter> waterMeters, bool isCondOp) { return null; }
        public IOperation ShowTestCollectFormOp(IRegReader[] regReaders, double volumeRef, double errLimLo, double errLimHi) { return null; }

		/// <returns>Reference to the operation</returns>
		public IOperation ShowTestEndFormOp(IRegReader[] regReaders, double refVolume, double errLimLo, double errLimHi)
		{
			if (currentOp != CurrentOp.None) throw new Exception("Sequence error");
			currentOp = CurrentOp.TestEndStates;
			this.regReaders = regReaders;
			this.refVolume = refVolume;
			this.errLimLo = errLimLo;
			this.errLimHi = errLimHi;
			return this;
		}

		/// <returns>Reference to the operation</returns>
		public IOperation ShowDeferredTestEvalFormOp(IRegReader[] regReaders, double refVolume, double errLimLo, double errLimHi)
		{
			if (currentOp != CurrentOp.None) throw new Exception("Sequence error");
			currentOp = CurrentOp.DeferredTestEval;
			this.regReaders = regReaders;
			this.refVolume = refVolume;
			this.errLimLo = errLimLo;
			this.errLimHi = errLimHi;
			return this;
		}

        delegate void EntryFormDlgt(EntryForm myRef);
        /// 
        void OpenBeginningDlg(EntryForm myRef)
        {
            myRef.modelessDlg = new CycleBeginningForm(TBF.Data.WMsCount, entryFormCfg.HideOrder);
            modelessDlg.Show();
        }
        /// 
        void OpenEndDlg(EntryForm myRef)
        {
    		myRef.modelessDlg = new CycleEndForm(TBF.Data.WMsCount, TBF.Data.LineSize);
			modelessDlg.Show();
        }
		///
		void OpenTestStartStatesDlg(EntryForm myRef)
		{
			log.Debug("-- OpenTestStartStatesDlg --");
            string ocrMessage;
            var ocr = GetOcr(myRef.OcrWorkspace, out ocrMessage);
            myRef.modelessDlg = new TestStartEndForm(TBF.Data.WMsCount, myRef.regReaders, ocr, ocrMessage, myRef.OcrStream,
                                                     startImages, disabled);
			modelessDlg.Show();
		}
		///
		void OpenTestEndStatesDlg(EntryForm myRef)
		{
			log.Debug("-- OpenTestEndStatesDlg --");
            string ocrMessage;
            var ocr = GetOcr(myRef.OcrWorkspace, out ocrMessage);
            myRef.modelessDlg = new TestStartEndForm(TBF.Data.WMsCount, myRef.regReaders, ocr, ocrMessage, myRef.OcrStream,
                                                     startImages, wmStartState, wmStartStateStr, endImages, disabled,
                                                     refVolume, errLimLo, errLimHi);
			modelessDlg.Show();
		}
		///
		void OpenDeferredTestEvalDlg(EntryForm myRef)
		{
            string ocrMessage;
            var ocr = GetOcr(myRef.OcrWorkspace, out ocrMessage);
            myRef.modelessDlg = new TestStartEndForm(TBF.Data.WMsCount, myRef.regReaders, ocr, ocrMessage, myRef.OcrStream,
                                                     startImages, endImages, disabled,
                                                     refVolume, errLimLo, errLimHi);
			modelessDlg.Show();
		}
        ///
        OcrVidi GetOcr(string ocrWorkspace, out string message)
        {
            message = string.Empty;
            if (string.IsNullOrEmpty(ocrWorkspace)) return null;        /// No OCR was configured

            string fullPath = (ocrWorkspace.Contains("\\") || ocrWorkspace.Contains("/"))
                            ? ocrWorkspace.Replace('/', '\\')
                            : System.IO.Path.Combine(DfltOcrWorkspaceFolder, ocrWorkspace);
            if (!fullPath.Contains(".")) fullPath = fullPath + DfltOcrWorkspaceExt;

            OcrVidi ocrVidi;
            if (ocrDictionary.TryGetValue(fullPath, out ocrVidi))
            {
                log.InfoFormat("existing OcrVidi({0}) was retrieved from dictionary", fullPath);
                return ocrVidi;
            }

            try
            {
                ocrVidi = new OcrVidi(fullPath);
                ocrDictionary.Add(fullPath, ocrVidi);
                log.WarnFormat("new OcrVidi({0}) was added to dictionary", fullPath);
                return ocrVidi;
            }
            catch (Exception e)
            {
                if (e.InnerException != null)
                {
                    log.ErrorFormat("new OcrVidi({0}) thrown {1}: {2} / {3}",
                        fullPath, e.GetType().ToString(), e.Message,e.InnerException.Message);
                }
                else
                {
                    log.ErrorFormat("new OcrVidi({0}) thrown {1}: {2}",
                        fullPath, e.GetType().ToString(), e.Message);
                }
                log.ErrorFormat("Stack trace:\r\n{0}", e.StackTrace);

                message = string.Format("Cannot load OCR workspace:\r\n{0}\r\nOCR workspace file is {1}", e.Message, fullPath);
                return null;
            }
        }

		/// <summary>Start this operation</summary>
		public void Start()
		{
			resultSaved = false;
			switch (currentOp)
            {
                case CurrentOp.ShowFormAtCycleBeginning:
					if (!entryFormCfg.EnterSerialNrsAtTheEnd)
					{
						Program.MainWnd.Invoke(new EntryFormDlgt(OpenBeginningDlg), this);
					}
                    break;

                case CurrentOp.ShowFormAtCycleEnd:
					if (entryFormCfg.EnterSerialNrsAtTheEnd)
					{
						Program.MainWnd.Invoke(new EntryFormDlgt(OpenBeginningDlg), this);
					}
					else if (entryFormCfg.ShowCycleEndForm)
					{
						Program.MainWnd.Invoke(new EntryFormDlgt(OpenEndDlg), this);
					}
                    break;

				case CurrentOp.TestStartStates:
					Program.MainWnd.Invoke(new EntryFormDlgt(OpenTestStartStatesDlg), this);
					break;

				case CurrentOp.TestEndStates:
					Program.MainWnd.Invoke(new EntryFormDlgt(OpenTestEndStatesDlg), this);
					break;

				case CurrentOp.DeferredTestEval:
					Program.MainWnd.Invoke(new EntryFormDlgt(OpenDeferredTestEvalDlg), this);
					break;
			}
		}

		/// <summary>Run this operation</summary>
		/// <returns>Event.ResultsPrinted</returns>
		public Event Run()
		{
			if ((modelessDlg is IHasCompleted) && !(modelessDlg as IHasCompleted).Completed)
			{
				return Event.ModelessFormIsOpen;
			}

			if (!resultSaved)		/// This is to save the result only once
			{
				if ((!entryFormCfg.EnterSerialNrsAtTheEnd && currentOp == CurrentOp.ShowFormAtCycleBeginning) ||
					 (entryFormCfg.EnterSerialNrsAtTheEnd && currentOp == CurrentOp.ShowFormAtCycleEnd))
				{
					CycleBeginningForm dlg = (modelessDlg as CycleBeginningForm);
					if (dlg != null)
					{
					    for (int i = 0; i < Math.Min(dlg.WaterMetersCount, waterMeters.Count); i++)
					    {
						    if (waterMeters[i] != null)
						    {
                                waterMeters[i].Disabled = disabled[i] = dlg.Disabled[i];
                                waterMeters[i].SerialNr = dlg.SNText[i];
                                if (!entryFormCfg.HideOrder && dlg.PurchaseOrder != null) waterMeters[i].PurchaseOrder = dlg.PurchaseOrder;
                            }
					    }
				    }
				}
				else if (currentOp == CurrentOp.ShowFormAtCycleEnd)
				{
					if (modelessDlg is CycleEndForm)
					{
						CycleEndForm dlg = (modelessDlg as CycleEndForm);
						int count = waterMeters.Count;
						if ((dlg != null) && (count > dlg.WaterMetersCount)) count = dlg.WaterMetersCount;

						for (int i = 0; i < count; i++)
						{
							if (waterMeters[i] != null)
							{
								/// In case entryFormCfg.ShowCycleEndForm == false dlg would be null, values would be string.Empty
								wmCycleEndState[i] = waterMeters[i].EndState = (dlg != null) ? dlg.EndStateText[i] : string.Empty;
							}
						}
					}
				}
                else if (modelessDlg is TestStartEndForm && currentOp == CurrentOp.TestStartStates)
				{
                    /// Fixed start/stop: test start
					TestStartEndForm dlg = (modelessDlg as TestStartEndForm);
                    if (dlg != null)
                    {
                        for (int i = 0; i < dlg.WaterMetersCount; i++)
                        {
                            wmStartState[i] = dlg.WMStartState[i];
                            wmStartStateStr[i] = dlg.WMStartStateStr[i];
                        }
                    }
                }
                else if (modelessDlg is TestStartEndForm && currentOp == CurrentOp.TestEndStates)
                {
                    /// Fixed start/stop: test end
                    TestStartEndForm dlg = (modelessDlg as TestStartEndForm);
                    if (dlg != null)
                    {
                        for (int i = 0; i < dlg.WaterMetersCount; i++)
                        {
                            wmStartState[i] = dlg.WMStartState[i];
                            wmStartStateStr[i] = dlg.WMStartStateStr[i];
                            wmEndState[i] = dlg.WMEndState[i];
                        }
                    }
                }
				else if (modelessDlg is TestStartEndForm && currentOp == CurrentOp.DeferredTestEval)
				{
					/// Fixed start/stop: deferred test evaluation
					TestStartEndForm dlg = (modelessDlg as TestStartEndForm);
					if (dlg != null)
					{
						for (int i = 0; i < dlg.WaterMetersCount; i++)
						{
							wmStartState[i] = dlg.WMStartState[i];
							wmStartStateStr[i] = dlg.WMStartStateStr[i];
							wmEndState[i] = dlg.WMEndState[i];
						}
					}
				}
				resultSaved = true;
				modelessDlg = null;
			}

			return Event.ModelessFormClosed;		/// Form closed
		}

		/// <summary>Stop this operation</summary>
		public void Stop()
		{
			if (modelessDlg is IHasCompleted)
			{
				UiBridge.Bridge.OnCloseModelessForm(this, null);
				modelessDlg = null;
			}
			currentOp = CurrentOp.None;
		}
	}
}