using DTS.Common.Enums.DBExport;
using DTS.SensorDB;
using System;
using System.Collections.Generic;
using System.Xml;

namespace DTS.Common.Import.XML
{
    public class XMLParseSensors : XMLParseBase
    {
        public XMLParseSensors(XmlElement root, double importedVersion, Func<bool> isCancelled = null,bool skipNormalizing=false) : base(root, importedVersion, isCancelled, skipNormalizing) { }

        public IImportNotification ImportNotification { get; set; }
        public override void Parse(ref ImportObject importObject)
        {
            ImportNotification?.SetStatus(new ImportStatus { PossibleStatus = Enums.PossibleStatus.Reading, ExtraStatus = Enums.ImportExtraStatus.ReadingSensors });
            var sensors = ParseSensors(_root);
            if (!_skipNormalizing)
            {
                var newRoot = ConvertSensors(sensors);
                sensors = ParseSensors(newRoot);
            }
            importObject.AddSensors(sensors);
        }
        public XmlElement ConvertSensors(IEnumerable<SensorData> sensors)
        {
            _writer.WriteStartElement(TopLevelFields.Sensors.ToString());
            //normalize to -2 ... -n (preserve -1 for invalid)
            var count = -2;
            foreach (var sd in sensors)
            {
                _sensorIdMapping[sd.DatabaseId] = count;
                sd.DatabaseId = count;
                count--;
                _writer.Flush();
                sd.WriteXML(ref _writer);
                _writer.Flush();
            }
            _writer.WriteEndElement();

            return GetXmlElement();
        }

        public IEnumerable<SensorData> ParseSensors(XmlElement root)
        {
            List<SensorData> sensors = new List<SensorData>();
            foreach (var node in root.ChildNodes)
            {
                if (IsCancelled())
                {
                    return sensors;
                }

                if (!(node is XmlElement)) continue;
                var sd = new SensorData();
                sd.ReadXML(node as XmlElement);

                sensors.Add(sd);
            }
            return sensors;
        }
    }
}