using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using libxmltv.Interfaces;
using System.Diagnostics;
using System.Xml.Linq;

namespace libxmltv.Core
{
    [Serializable]
    internal class XMLTVSource : IXMLTVSource, IDisposable, ICloneable
    {
        private Dictionary<string, string> entries = new Dictionary<string, string>();
        internal static void CreateInstance(XMLTVRuntimeInstance xmltv)
        {
            using (XMLTVSource g = new XMLTVSource(xmltv)) { g.instance.Source = (IXMLTVSource)g.Clone(); }
        }

        private XMLTVRuntimeInstance instance;
        protected XMLTVSource(string sourcename, string generatorname, string generatorurl)
        {
        }
        protected XMLTVSource(XMLTVRuntimeInstance xmltv)
        {
            xmltv_logger.Log.Verbose.Debug.WriteLine("Creating Instance of XMLTVSource");
            //IXMLTV_PARSER _xmltv;
            //if (!Internals.VerifyInstance<IXMLTV_PARSER>(xmltv, out _xmltv)) { return; }
            //XMLTV_PARSER = _xmltv;
            instance = xmltv;
            Create();
        }
       
        #region IXMLTVSource
        //private IXMLTV_PARSER XMLTV_PARSER { get; set; }
        public string SourceName { get; private set; }
        public string GeneratorName { get; private set; }
        public string GeneratorUrl { get; private set; }
        #endregion

        private void Create()
        {
            var doc = XDocument.Parse(instance.XmlDoc);
            Debug.Assert(doc.Root.Name == XMLTVConstants.ROOT_ELEMENT, string.Format("Expected Root Element: '{0}' but read: '{1}'", XMLTVConstants.ROOT_ELEMENT, doc.Root.Name));
            //xmltv_logger.Log.Verbose.Debug.WriteLine("\tRoot: {0}", doc.Root.Name);
            var attributes = doc.Root.Attributes().ToList();
            foreach (var attribute in attributes)
            {
                //xmltv_logger.Log.Verbose.Debug.WriteLine("\t{0}: {1}", attribute.Name, attribute.Value);
                entries.Add(attribute.Name.ToString(), attribute.Value);
            }

            SourceName = entries[XMLTVConstants.Source.SourceName];
            GeneratorName = entries[XMLTVConstants.Source.GeneratorName];
            GeneratorUrl = entries[XMLTVConstants.Source.GeneratorUrl];

        }
        public override string ToString()
        {
            return string.Format("XmlTv Source: '{0}' (Generated by: '{1}') (support: '{2}')", SourceName, GeneratorName, GeneratorUrl);
        }

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

        public object Clone()
        {
            return new XMLTVSource(this.SourceName, this.GeneratorName, this.GeneratorUrl);
        }
    }
}