using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;
using System.Xml;
using VEPROMS.CSLA.Library;

namespace VEPROMS
{
    //C2025-024 Electronic Procedures - Phase 2 (PROMS XML output)
    //class inherits from normal import/export form
    //then adds additional functionality
#pragma warning disable S101 // Types should be named in PascalCase
    public partial class dlgExportImportEP : dlgExportImport
#pragma warning restore S101 // Types should be named in PascalCase
	{
		private readonly AnnotationTypeInfo _AnnotationType;
        private readonly string multiseparator = ",";

		private static Regex _ROAccPageTokenPattern = new Regex("[<][^<>-]+-[^<>]+[>]");

        public dlgExportImportEP(string mode, FolderInfo folderInfo, frmVEPROMS myFrmVEPROMS, int annotationTypeId, int unitIndex = 0) : base(mode, folderInfo, myFrmVEPROMS, (E_UCFImportOptions)0, unitIndex)
        {
            _AnnotationType = AnnotationTypeInfo.Get(annotationTypeId);
            _ExportBothConvertedandNot = true;
            DocReplace = new Dictionary<int, byte[]>();
            FormClosed += OnClose;
            Text = $"{mode} Electronic Procedure ({_AnnotationType.Name}) Dialog for {folderInfo.Name}";
		}
        public dlgExportImportEP(string mode, DocVersionInfo docVersionInfo, frmVEPROMS myFrmVEPROMS, int annotationTypeId, int unitIndex = 0) : base(mode, docVersionInfo, myFrmVEPROMS, (E_UCFImportOptions)0, unitIndex)
        {
            _AnnotationType = AnnotationTypeInfo.Get(annotationTypeId);
            _ExportBothConvertedandNot = true;
            DocReplace = new Dictionary<int, byte[]>();
            FormClosed += OnClose;
            Text = $"{mode} Electronic Procedure ({_AnnotationType.Name}) Dialog for {docVersionInfo.Name} of {docVersionInfo.MyFolder.Name}";
		}
        public dlgExportImportEP(string mode, ProcedureInfo procedureInfo, frmVEPROMS myFrmVEPROMS, int annotationTypeId, int unitIndex = 0) : base(mode, procedureInfo, myFrmVEPROMS, (E_UCFImportOptions)0, unitIndex)
		{
			_AnnotationType = AnnotationTypeInfo.Get(annotationTypeId);
			_ExportBothConvertedandNot = true;
			DocReplace = new Dictionary<int, byte[]>();
			FormClosed += OnClose;
			Text = $"{mode} Electronic Procedure ({_AnnotationType.Name}) Dialog for {procedureInfo.DisplayNumber}";
		}

		//Overridden function to handle export of EP data
		protected override void ExportEPAnnotationInfo(XmlElement xe, ItemInfo ii)
		{
			if (_UnitIndex > 0)
            {
				ii.MyDocVersion.DocVersionConfig.SelectedSlave = _UnitIndex;
				ii.MyProcedure.MyDocVersion.DocVersionConfig.SelectedSlave = _UnitIndex;
            }

            //switch to handle customizations for different formats
            switch (ii.ActiveFormat.PlantFormat.EPFormatFiles.Find(x => x.AnnotationTypeID == _AnnotationType.TypeID)?.Name)
			{
				default:
					ExportEPAnnotationInfo_Default(xe, ii);
					break;
			}

			ii.MyDocVersion.DocVersionConfig.SelectedSlave = 0;
			ii.MyProcedure.MyDocVersion.DocVersionConfig.SelectedSlave = 0;

		}

		//default export of EP Data
		private void ExportEPAnnotationInfo_Default(XmlElement xe, ItemInfo ii)
		{
			//Add tab text to item
			string steptab = Volian.Print.Library.PDFReport.BuildStepTab(ii);
			xe.Attributes.SetNamedItem(AddAttribute(xe.OwnerDocument, "StepTab", steptab));

			//Add db sequence to item
			string dbsequence = dbSeq(ii);
			xe.Attributes.SetNamedItem(AddAttribute(xe.OwnerDocument, "dbsequence", dbsequence));

			//get first transition in item and add it as an xml element
			if (ii.MyContent.ContentTransitionCount > 0)
			{
				TransitionInfo ct = ii.MyContent.ContentTransitions[0];
				xe.Attributes.SetNamedItem(AddAttribute(xe.OwnerDocument, "TransitionToItemID", ct.ToID.ToString()));
				xe.Attributes.SetNamedItem(AddAttribute(xe.OwnerDocument, "TransitionTodbsequence", dbSeq(ct.ToID)));
			}

			//export EP annotation details under an EPInfo node
			if (ii.ItemAnnotations != null)
			{
				XmlElement xepinfo = xe.OwnerDocument.CreateElement("EPInfo");

				EPFields myEPFields = ii.GetValidEPFields(_AnnotationType.TypeID);
				ROFSTLookup lookup = ii.MyDocVersion.DocVersionAssociations[0].MyROFst.GetROFSTLookup(ii.MyDocVersion);
				bool epexportblank = ii.EPexportblank(_AnnotationType.TypeID); //should blank xml elements export?

				//grab the current RO db so will know location of RO files and default graphics ext.
                using (RODbInfo myRODB = (RODbInfoList.Get()).FirstOrDefault(x => x.RODbID == ii.MyDocVersion.DocVersionAssociations[0].MyROFst.RODbID))
                {
					//For each annotation in the item that is of the current EP Annotation type
					foreach (var EPAnnotation in ii.ItemAnnotations.Where(x => x.TypeID == _AnnotationType.TypeID))
					{
						var EPAnnotationConfig = new AnnotationConfig(EPAnnotation.Config);

						XmlElement xepdetails = xe.OwnerDocument.CreateElement("Details");
						//include the annotation ID for reference
						xepdetails.Attributes.SetNamedItem(AddAttribute(xepdetails.OwnerDocument, "AnnotationID", EPAnnotation.AnnotationID.ToString()));

						//loop through each EP Field - name the xml elements the EP.name
						foreach (EPField EP in myEPFields)
						{
							string val = EPAnnotationConfig.GetValue("EP", EP.name);

							if (epexportblank || !string.IsNullOrEmpty(val))
							{

								if (_UnitIndex != 0)
								{
									val = DisplayText.ResolveUnitSpecific(ii.MyDocVersion, val);
								}

								XmlElement xindivid = xe.OwnerDocument.CreateElement(EP.name);

								//need to resolve ROs ROSingle, ROMulti, in text
								//get values
								switch (EP.type.ToLower())
								{
									case "text":

										//for text, check if any embedded ROs
										//if none, set the xml element to the text
										//otherwise resolve the ROs
										MatchCollection matches = _ROAccPageTokenPattern.Matches(val);
										if (matches.Count == 0)
										{
											xindivid.InnerText = val;
										}
										else
										{
											//resolve ROs
											//text ROs will replace the AccID key in the text
											//for binary objects like images,
											//we will keep the AccID in the text and output the binary as a separate child
											//XML element with the same xml name as the AccID
											foreach (Match m in matches)
											{
												ROFSTLookup.rochild roc = lookup.GetROChildByAccPageID(m.Groups[0].Value);

												// Exclude replacing Images since are binary - for those, add a sub item
												if (Enumerable.Range(8, 15).Contains(roc.type))
												{
													xindivid.InnerText = val;

													XmlElement xroid = AddGraphic(xindivid, m.Groups[0].Value, roc, myRODB, roc.type != 8);

													xindivid.AppendChild(xroid);
												}
												else if (!string.IsNullOrEmpty(roc.value))
												{
													bool convertCaretToDeltaSymbol = (ii.ActiveSection != null) && ii.ActiveSection.ActiveFormat.PlantFormat.FormatData.SectData.ConvertCaretToDelta;

													string rocvalue = roc.value.Replace("`", "\xB0");
													rocvalue = rocvalue.Replace("\xF8", "\xB0");
													rocvalue = rocvalue.Replace("\x7F", "\x394"); //delta
													if (convertCaretToDeltaSymbol) rocvalue = rocvalue.Replace("^", "\x394"); // delta
													val = val.Replace($"{m.Groups[0].Value}", rocvalue);
													xindivid.InnerText = val;
												}
											}
										}
										break;
									case "rosingle":
										//Get the output columns from the EPFormatFile
										//set the "Item" nodes value = to those resolved items
										//separated by multiseparator
										XmlElement xindivid_rosingle = xindivid.OwnerDocument.CreateElement("Item");
										xindivid_rosingle.Attributes.SetNamedItem(AddAttribute(xindivid_rosingle.OwnerDocument, "ROID", val));

										//add values specified in EP input list
										List<string> ro_single_tmp = EP.getROValuesList(EPAnnotation, val);
										xindivid_rosingle.InnerText = String.Join(multiseparator, ro_single_tmp.ToArray());

										//if image, add location and binary of image
										// - images are type 8
										//   but if multiple return values could combine
										//   for example an text (1) + image (8) would be 9
										ROFSTLookup.rochild roc_single = lookup.GetRoChild(val);
										if (Enumerable.Range(8, 15).Contains(roc_single.type))
										{
											XmlElement xroid = AddGraphic(xindivid, val, roc_single, myRODB, roc_single.type != 8);
											xindivid_rosingle.AppendChild(xroid);
										}

										xindivid.AppendChild(xindivid_rosingle);
										break;
									case "romulti":
										//Get the output columns from the EPFormatFile
										//create an "Item" subnode for each selected RO
										//set the nodes value = to those resolved items
										//separated by multiseparator
										foreach (string ival in val.Split(multiseparator.ToCharArray()))
										{
											XmlElement xindivid_romulti = xindivid.OwnerDocument.CreateElement("Item");
											xindivid_romulti.Attributes.SetNamedItem(AddAttribute(xindivid_romulti.OwnerDocument, "ROID", ival));

											//add values specified in EP input list
											List<string> ro_multi_tmp = EP.getROValuesList(EPAnnotation, ival);
											xindivid_romulti.InnerText = String.Join(multiseparator, ro_multi_tmp.ToArray());

											//if image, add location and binary of image
											// - images are type 8
											//   but if multiple return values could combine
											//   for example an text (1) + image (8) would be 9
											ROFSTLookup.rochild roc_multi = lookup.GetRoChild(ival);
											if (Enumerable.Range(8, 15).Contains(roc_multi.type))
											{
												XmlElement xroid = AddGraphic(xindivid, ival, roc_multi, myRODB, roc_multi.type != 8);
												xindivid_romulti.AppendChild(xroid);
											}

											xindivid.AppendChild(xindivid_romulti);
										}
										break;
									case "tableinput":
										xindivid.InnerText = val;
										break;
									default:
										xindivid.InnerText = val;
										break;
								}
								xepdetails.AppendChild(xindivid);
							}
						}
						xepinfo.AppendChild(xepdetails);
					}

				}

				xe.AppendChild(xepinfo);
			}

		}

		//return a db sequence string from an Item ID
		private string dbSeq(int itemID)
		{
			using (ItemInfo ii = ItemInfo.Get(itemID))
            {
				return dbSeq(ii);
			}
		}

        //return a db sequence string from an ItemInfo
        private string dbSeq(ItemInfo ii) => $"{((FolderInfo)ii.MyDocVersion.ActiveParent).Name}:{ii.MyProcedure.DisplayNumber} {ii.MyProcedure.DisplayText}:{ii.DBSequence}";

        //For Exporting an RO that is an image
        //returns the Location and FileName of the RO Image
        private string GetROImageFileLocation(ROFSTLookup.rochild roc, RODbInfo rodb, bool isMulti)
		{
			string rodbpath = rodb.FolderPath;

			string rocval = roc.value;
			if (rocval == null) rocval = Array.Find(roc.children, x => x.value.Contains('.')).value;

			if (rocval == null) return "";
			string imgname;
			if (isMulti)
			{
				imgname = rocval.Substring(rocval.IndexOf(' ') + 1, rocval.IndexOf("\r\n") - rocval.IndexOf(' ') - 1);
			}
			else
			{
				imgname = rocval.Substring(0, rocval.IndexOf('\n'));
			}
			int thedot = imgname.LastIndexOf('.');
			string fname = imgname;
			if (thedot == -1 || (thedot != (imgname.Length - 4)))
			{
				RODbConfig roDbCfg = new RODbConfig(rodb.Config);
				fname += string.Format(".{0}", roDbCfg.GetDefaultGraphicExtension());
			}

			string imgfile = Path.Combine(rodbpath, fname);
			return imgfile;
		}

		//For Exporting an RO that is an image
		//returns an xmlElement
		// - that is a child to xindivid
		// - that has a name of Name
		// - that has a value of the binary representation of the image
		// - that has an attribute designating the location of the image file
		private XmlElement AddGraphic(XmlElement xindivid, string Name, ROFSTLookup.rochild roc, RODbInfo rodb, bool isMulti)
		{
            Name = Name.Replace("<", "").Replace(">", "");

			XmlElement xroid = xindivid.OwnerDocument.CreateElement(Name);

			string imgfile = GetROImageFileLocation(roc, rodb, isMulti);
			if (string.IsNullOrEmpty(imgfile)) return xroid;
			xroid.Attributes.SetNamedItem(AddAttribute(xroid.OwnerDocument, "Location", imgfile));

			if (File.Exists(imgfile))
			{
				using (FileStream fsIn = new FileStream(imgfile, FileMode.Open, FileAccess.Read, FileShare.Read))
				{
					// Create an instance of StreamReader that can read characters from the FileStream.
					using (BinaryReader r = new BinaryReader(fsIn))
						xroid.InnerText = Encoding.Default.GetString(r.ReadBytes((int)fsIn.Length));
				}
			}

			return xroid;
		}

		//overridden - used to set the RO location for RO Images that are not in annotations
		protected override void SetROLocation(ref XmlElement xindivid, ROFSTLookup.rochild roc, RODbInfo rodb, bool isMulti)
		{
			string imgfile = GetROImageFileLocation(roc, rodb, isMulti);
			if (!string.IsNullOrEmpty(imgfile)) xindivid.Attributes.SetNamedItem(AddAttribute(xindivid.OwnerDocument, "Location", imgfile));
		}

		//overridden - used to set specific enhanced doc info
		protected override void SetEPEnhancedDocLinks(ref XmlElement xe, ItemInfo ii)
		{
			EnhancedDocuments eds = ii.GetMyEnhancedDocuments();

			if (eds != null && eds.Count == 1)
			{
				xe.Attributes.SetNamedItem(AddAttribute(xe.OwnerDocument, "EnhancedDocType", eds[0].Type.ToString()));
				xe.Attributes.SetNamedItem(AddAttribute(xe.OwnerDocument, "EnhancedDocToItemID", eds[0].ItemID.ToString()));
				xe.Attributes.SetNamedItem(AddAttribute(xe.OwnerDocument, "EnhancedDocToDbSeq", dbSeq(eds[0].ItemID)));
			}
		}

		//clear objects to release memory
		private void OnClose(object sender, EventArgs e)
		{
			DocReplace.Clear();
			DocReplace = null;
		}


	}
}