using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using libxmltv.Interfaces;
using System.IO;
using Enterprise.Logging;
using System.Xml.Linq;
using System.Xml;

namespace libxmltv.Core
{   
    internal class XMLTVLoader : IDisposable
    {
        private string xmlfile = string.Empty;
        internal static void CreateInstance(string xml_file, XMLTVRuntimeInstance xmltv)
        {
            using (XMLTVLoader g = new XMLTVLoader(xml_file, xmltv)) { }            
        }
        private XMLTVRuntimeInstance instance;
        protected XMLTVLoader(string xml_file, XMLTVRuntimeInstance xmltv)
        {
            xmltv_logger.Log.Verbose.Debug.WriteLine("Creating Instance of XMLTVLoader");
            //string _xmltv;
            //if (!Internals.VerifyInstance<string>(xmltv, out _xmltv)) { return; }
            //xmlfile = _xmltv;
            //LoadXml();
            instance = xmltv;
            instance.XmlFile = new FileInfo(xml_file);
            LoadXml();
        }
        //#region IXMLTV_LOADER
        //public FileInfo XmlFile { get { return new FileInfo(xmlfile); } }
        //public XDocument XmlDoc { get; private set; }
        //#endregion

        private void LoadXml()
        {
            xmltv_logger.Log.Info.WriteLine("Loading XMLTV File: {0}", instance.XmlFile.Name);
            //xmltv_logger.Log.Warn.WriteLine("XML File Loading has not been implemented yet!");
            try
            {
                var document = XDocument.Load(instance.XmlFile.FullName);
                using (var ms = new MemoryStream())
                using (var xw = new XmlTextWriter(ms, Encoding.UTF8))
                {
                    document.Save(xw);
                    xw.Flush();
                    StreamReader sr = new StreamReader(ms);
                    ms.Seek(0, SeekOrigin.Begin);
                    instance.XmlDoc = sr.ReadToEnd();
                }
                document = null;
            }
            catch (Exception ex)
            {
                xmltv_logger.Log.Error.WriteLine("Failed to load XMLTV File: {0}", instance.XmlFile.Name);
                xmltv_logger.Log.Error.WriteLine(ex.GetBaseException().ToString());
            }
        }

        public void Dispose()
        {
            //throw new NotImplementedException();
        }

        
    }
}