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

namespace libxmltv.Core
{
    internal class XMLTVChannelCollection : IDisposable
    {
        private Dictionary<string, IXMLTVChannel> entries = new Dictionary<string, IXMLTVChannel>();
        internal static void CreateInstance(XMLTVRuntimeInstance xmltv)
        {
            using (XMLTVChannelCollection g = new XMLTVChannelCollection(xmltv)) { g.instance.Channels = g.Collection; }
        }
        private XMLTVRuntimeInstance instance;
        public XMLTVChannelCollection(XMLTVRuntimeInstance xmltv)
        {
            XMLTV_LOGGER.Log.Verbose.Debug.WriteLine("Creating Instance of XMLTVChannelCollection");
            //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 Dictionary<string, IXMLTVChannel> Collection
        {
            get { return entries; }
        }
        #endregion

        private void Create()
        {
            var doc = instance.XmlDoc;

            foreach (var c in doc.Descendants(XMLTVConstants.CHANNEL_ELEMENT))
            {
                Channel channel = new Channel(c);
                entries.Add(channel.Id, channel);
                Application.DoEvents();
            }
            //instance.Channels = Collection;
        }
        public override string ToString()
        {
            return string.Format("Channel Count: {0}", Collection == null ? 0 : Collection.Count);
        }

        public void Dispose()
        {
            //throw new NotImplementedException();
        }
    }
    [Serializable]
    internal class Channel : IXMLTVChannel
    {
        public Channel()
        {
            Id = string.Empty;
            Number = 0;
            CallSign = string.Empty;
            Name = string.Empty;
        }
        public Channel(XElement e)
            : this()
        {
            // get the channel id
            Id = e.Attribute(XMLTVConstants.Channels.ChannelId).Value;
            XMLTV_LOGGER.Log.Verbose.Debug.WriteLine("\tchannel_id: {0}", Id);
            var names = e.Descendants(XMLTVConstants.Channels.ChannelDisplayName).ToList();
            Number = Convert.ToInt32(names[1].Value);
            XMLTV_LOGGER.Log.Verbose.Debug.WriteLine("\tchannel_number: {0}", Number);
            CallSign = names[2].Value;
            XMLTV_LOGGER.Log.Verbose.Debug.WriteLine("\tchannel_callsign: {0}", CallSign);
            Name = names[3].Value;
            XMLTV_LOGGER.Log.Verbose.Debug.WriteLine("\tchannel_name: {0}", Name);
        }
        #region IXMLTVChannel members
        public string Id { get; private set; }
        public int Number { get; private set; }
        public string CallSign { get; private set; }
        public string Name { get; private set; }
        #endregion
        public override string ToString()
        {
            return string.Format("{0}: {1} {2} ({3})", Id,Number,Name, CallSign);
        }
    }
}