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
{
    internal class XMLTVChannelCollection
    {
        private Dictionary<string, IXMLTVChannel> entries = new Dictionary<string, IXMLTVChannel>();
        public XMLTVChannelCollection(object 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;
            Create();
        }

        #region IXMLTVSource
        private IXMLTV_PARSER XMLTV_PARSER { get; set; }
        public Dictionary<string, IXMLTVChannel> Collection
        {
            get { return entries; }
        }
        #endregion

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

            foreach (var c in doc.Descendants(XMLTV_CONSTANTS.CHANNEL_ELEMENT))
            {
                Channel channel = new Channel(c);
                entries.Add(channel.ChannelId, channel);
            }
        }
        public override string ToString()
        {
            //return string.Format("XmlTv Source: '{0}' (Generated by: '{1}') (support: '{2}')", SourceName, GeneratorName, GeneratorUrl);
            return string.Empty;
        }
    }

    internal class Channel : IXMLTVChannel
    {
        public Channel()
        {
            ChannelId = string.Empty;
            ChannelNumber = 0;
            ChannelCallSign = string.Empty;
            ChannelName = string.Empty;
        }
        public Channel(XElement e)
            : this()
        {
            // get the channel id
            ChannelId = e.Attribute(XMLTV_CONSTANTS.Channels.ChannelId).Value;
            var names = e.Descendants(XMLTV_CONSTANTS.Channels.ChannelDisplayName).ToList();
            ChannelNumber = Convert.ToInt32(names[1].Value);
            ChannelCallSign = names[2].Value;
            ChannelName = names[3].Value;
        }
        #region IXMLTVChannel members
        public string ChannelId { get; private set; }
        public int ChannelNumber { get; private set; }
        public string ChannelCallSign { get; private set; }
        public string ChannelName { get; private set; }
        #endregion
    }
}