using DTS.Common.Enums.DBExport;
using DTS.Common.Import.Interfaces;
using DTS.Common.Import.XML;
using DTS.Common.Utils;
using DTS.Slice.Users;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Xml;

namespace DTS.Common.Import
{
    public static class XmlParserFactory
    {
        public static List<IUIItems> UIItems { get; set; }
        private static Func<bool> _isCancelled;
        public static IImportNotification ImportNotification { get; set; }
        private static List<IParseVariant> LessThan20XMLVersion(XmlElement node, double importVersion)
        {
            List<IParseVariant> parseVariants = new List<IParseVariant>();
            //FB 36879 prevent exception if there is no node to process
            if (node == null || node.ChildNodes == null)
            {
                return parseVariants;
            }
            foreach (var childNode in node.ChildNodes)
            {
                if (childNode is XmlElement)
                {
                    var root = childNode as XmlElement;
                    var name = root.Name;
                    if (Enum.TryParse(name, out TopLevelFields field))
                    {
                        switch (field)
                        {
                            case TopLevelFields.CustomChannels:
                                var xmlCustomChannels = new XMLParseMMECustomChannels(root, importVersion, _isCancelled);
                                parseVariants.Add(xmlCustomChannels);
                                break;
                            case TopLevelFields.CustomMainLocs:
                                var xmlCustomMainLocs = new XMLParseMMECustomMainLocations(root, importVersion, _isCancelled);
                                parseVariants.Add(xmlCustomMainLocs);
                                break;
                            case TopLevelFields.DASList:
                                var xmlParseDasList = new XMLParseDASList(root, importVersion, _isCancelled);
                                parseVariants.Add(new XMLPre20ParseDASList(root, importVersion, xmlParseDasList, _isCancelled));
                                break;
                            case TopLevelFields.Sensors:
                                var xmlParseSensors = new XMLParseSensors(root, importVersion, _isCancelled);
                                xmlParseSensors.ImportNotification = ImportNotification;
                                parseVariants.Add(new XMLPre20ParseSensors(root, importVersion, xmlParseSensors, _isCancelled));
                                break;
                            case TopLevelFields.Calibrations:
                                var xmlParseCalibrations = new XMLParseCalibrations(root, importVersion, _isCancelled);
                                xmlParseCalibrations.ImportNotification = ImportNotification;
                                parseVariants.Add(new XMLPre20ParseCalibrations(root, importVersion, xmlParseCalibrations, _isCancelled));
                                break;
                            case TopLevelFields.GroupTemplates:
                                var xmlParseGroupTemplates = new XMLParseGroupTemplates(root, importVersion, null, _isCancelled);
                                parseVariants.Add(new XMLPre20ParseGroupTemplates(root, importVersion, xmlParseGroupTemplates, _isCancelled));
                                break;
                            case TopLevelFields.Groups:
                                var xmlParseGroups = new XMLParseGroups(root, importVersion);
                                xmlParseGroups.ImportNotification = ImportNotification;
                                parseVariants.Add(new XMLPre20ParseGroups(root, importVersion, null, xmlParseGroups, _isCancelled));
                                break;
                            case TopLevelFields.TestSetups:
                                var xmlParseTestSetups = new XMLParseTestSetups(root, importVersion, _isCancelled);
                                xmlParseTestSetups.ImportNotification = ImportNotification;
                                parseVariants.Add(new XMLPre20ParseTestSetups(root, importVersion, DTS.Common.Enums.IsoViewMode.ISOOnly, xmlParseTestSetups, _isCancelled));
                                break;
                        }
                    }
                }
            }
            return parseVariants;
        }


        private static List<IParseVariant> GreaterOrEqual20XMLVersion(XmlElement node, double importVersion)
        {
            List<IParseVariant> parseVariants = new List<IParseVariant>();
            foreach (var childNode in node.ChildNodes)
            {
                if (childNode is XmlElement)
                {
                    var root = childNode as XmlElement;
                    var name = root.Name;
                    if (Enum.TryParse(name, out TopLevelFields field))
                    {
                        switch (field)
                        {

                            case TopLevelFields.LabDetails:
                                var xmlParseLab = new XMLParseLabDetails(root, importVersion, _isCancelled);
                                xmlParseLab.ImportNotification = ImportNotification;
                                parseVariants.Add(xmlParseLab);
                                break;
                            case TopLevelFields.CustomerDetails:
                                var xmlParseCustomer = new XMLParseCustomerDetails(root, importVersion, _isCancelled);
                                xmlParseCustomer.ImportNotification = ImportNotification;
                                parseVariants.Add(xmlParseCustomer);
                                break;
                            case TopLevelFields.TestEngineerDetails:
                                var xmlParseTestEngineer = new XMLParseTestEngineerDetails(root, importVersion, _isCancelled);
                                xmlParseTestEngineer.ImportNotification = ImportNotification;
                                parseVariants.Add(xmlParseTestEngineer);
                                break;
                            case TopLevelFields.DASList:
                                var xmlParseDasList = new XMLParseDASList(root, importVersion, _isCancelled);
                                xmlParseDasList.ImportNotification = ImportNotification;
                                parseVariants.Add(xmlParseDasList);
                                break;
                            case TopLevelFields.Sensors:
                                var xmlParseSensors = new XMLParseSensors(root, importVersion, _isCancelled);
                                xmlParseSensors.ImportNotification = ImportNotification;
                                parseVariants.Add(xmlParseSensors);
                                break;
                            case TopLevelFields.Calibrations:
                                var xmlParseCalibrations = new XMLParseCalibrations(root, importVersion, _isCancelled);
                                xmlParseCalibrations.ImportNotification = ImportNotification;
                                parseVariants.Add(xmlParseCalibrations);
                                break;
                            case TopLevelFields.GroupTemplates:
                                var xmlParseGroupTemplates = new XMLParseGroupTemplates(root, importVersion, null, _isCancelled);
                                parseVariants.Add(xmlParseGroupTemplates);
                                break;
                            case TopLevelFields.Groups:
                                var xmlParseGroups = new XMLParseGroups(root, importVersion, _isCancelled);
                                xmlParseGroups.ImportNotification = ImportNotification;
                                parseVariants.Add(xmlParseGroups);
                                break;
                            case TopLevelFields.TestSetups:
                                var xmlParseTestSetups = new XMLParseTestSetups(root, importVersion, _isCancelled);
                                xmlParseTestSetups.ImportNotification = ImportNotification;
                                parseVariants.Add(xmlParseTestSetups);
                                break;
                            case TopLevelFields.Users:
                                var xmlParseUsers = new XMLParseUsers(root, importVersion, UIItems, _isCancelled);
                                parseVariants.Add(xmlParseUsers);
                                break;
                        }
                    }
                }
            }
            return parseVariants;
        }

        public static IEnumerable<IParseVariant> CreateXMLParsers(string fileName, IImportNotification importNotification, Func<bool> isCanceled)
        {
            double importVersion = -1;
            _isCancelled = isCanceled;
            ImportNotification = importNotification;
            var node = FileUtils.GetImportXmlNode(fileName, null, out importVersion);

            if (importVersion < FileUtils.DataPRO20XmlVersion)
            {
                return LessThan20XMLVersion(node, importVersion);
            }
            else
            {
                return GreaterOrEqual20XMLVersion(node, importVersion);
            }
        }

    }
}