using DTS.Common.Import.Interfaces;
using System;
using System.Collections.Generic;
using System.Xml;

namespace DTS.Common.Import.XML
{
    public abstract class XMLParseBase : IParseVariant
    {
        protected static readonly Dictionary<int, int> _dasIdMapping = new Dictionary<int, int>();
        //Use string to handle both new (Id (int.ToString())) and old (Name (string)) exports
        protected static readonly Dictionary<string, int> _groupIdMapping = new Dictionary<string, int>();
        protected static readonly Dictionary<int, int> _sensorIdMapping = new Dictionary<int, int>();
        protected static readonly Dictionary<long, long> _channelIdMapping = new Dictionary<long, long>();

        protected double _importedVersion;

        protected readonly Func<bool> IsCancelled;
        protected readonly XmlElement _root;
        protected XmlWriter _writer;

        protected bool _skipNormalizing;
        private readonly XmlDocument _doc;

        public string FileName { get; set; }
        public abstract void Parse(ref ImportObject importObject);

        protected XMLParseBase(XmlElement root, double importedVersion, Func<bool> isCancelled = null, bool skipNormalizing = false)
        {
            _importedVersion = importedVersion;

            IsCancelled = isCancelled == null ? () => false : isCancelled;

            _root = root;

            _skipNormalizing = skipNormalizing;
            _doc = new XmlDocument();
            _writer = _doc.CreateNavigator().AppendChild();
        }

        protected XmlElement GetXmlElement()
        {
            _writer.Close();
            return _doc.DocumentElement;
        }

    }
}