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

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

        //
        private DateTime ParseDate(string timeStamp)
        {
            DateTime dt = new DateTime();
            try
            {
                dt = DateTime.ParseExact(timeStamp, "yyyyMMddHHmmss zzzz", System.Globalization.CultureInfo.CurrentCulture);
            }
            catch (Exception ex) { throw ex; }
            return dt;
        }
        private void Create()
        {
            var doc = instance.XmlDoc;
            int index = 0;
            foreach (var c in doc.Descendants(XMLTVConstants.PROGRAM_ELEMENT))
            {
                Program program = new Program();

                program.Id = index;
                XMLTV_LOGGER.Log.Verbose.Debug.WriteLine("program_Id: {0}", program.Id);
                if (c.HasAttributes)
                {
                    var start = c.Attribute(XMLTVConstants.Programs.ProgramStart).Value;
                    program.Start = ParseDate(start);
                    XMLTV_LOGGER.Log.Verbose.Debug.WriteLine("\tprogram_start: {0}", start);
                    var stop = c.Attribute(XMLTVConstants.Programs.ProgramStop).Value;
                    program.Stop = ParseDate(stop);
                    XMLTV_LOGGER.Log.Verbose.Debug.WriteLine("\tprogram_stop: {0}", stop);
                    var channelid = c.Attribute(XMLTVConstants.Programs.ProgramChannelId).Value;
                    XMLTV_LOGGER.Log.Verbose.Debug.WriteLine("\tprogram_channelid: {0}", channelid);
                    IXMLTVChannel channel = new Channel();
                    try
                    {
                        channel = instance.Channels[channelid];
                    }
                    catch (KeyNotFoundException)
                    {
                        XMLTV_LOGGER.Log.Verbose.Error.WriteLine(string.Format("Unable to find Channel by id: '{0}' for this program.", channelid));
                    }
                    program.Channel = channel;
                    XMLTV_LOGGER.Log.Verbose.Debug.WriteLine("\tprogram_channel: {0}", program.Channel.ToString());
                }
                try
                {
                    var title = c.Descendants(XMLTVConstants.Programs.ProgramTitle).FirstOrDefault().Value;
                    program.Title = title;                    
                }
                catch (Exception) { program.Title = string.Empty; }
                XMLTV_LOGGER.Log.Verbose.Debug.WriteLine("\tprogram_title: {0}", program.Title == string.Empty ? "empty" : program.Title);
                try
                {
                    var subtitle = c.Descendants(XMLTVConstants.Programs.ProgramSubTitle).FirstOrDefault().Value;
                    program.SubTitle = subtitle;                    
                }
                catch (Exception) { program.SubTitle = string.Empty; }
                XMLTV_LOGGER.Log.Verbose.Debug.WriteLine("\tprogram_subtitle: {0}", program.SubTitle == string.Empty ? "empty" : program.SubTitle);
                try
                {
                    var description = c.Descendants(XMLTVConstants.Programs.ProgramDescription).FirstOrDefault().Value;
                    program.Description = description;                    
                }
                catch (Exception) { program.Description = string.Empty; }
                XMLTV_LOGGER.Log.Verbose.Debug.WriteLine("\tprogram_description: {0}", program.Description == string.Empty ? "empty" : program.Description);

                entries.Add(program.Id, program);
                Application.DoEvents();
                index++;
            }
            //instance.Programs = Collection;
        }
        public override string ToString()
        {
            return string.Format("Program Count: {0}", Collection == null ? 0 : Collection.Count);
        }

        public void Dispose()
        {
            //throw new NotImplementedException();
        }
    }
    [Serializable]
    internal class Program : IXMLTVProgram
    {
        public Program()
        {
            Id = 0;
            Start = new DateTime();
            Stop = new DateTime();
            Channel = new Channel();
            Title = string.Empty;
            SubTitle = string.Empty;
            Description = string.Empty;
        }
        #region IXMLTVProgram members
        public int Id { get; set; }
        public DateTime Start { get; set; }
        public DateTime Stop { get; set; }
        public IXMLTVChannel Channel { get; set; }
        public string Title { get; set; }
        public string SubTitle { get; set; }
        public string Description { get; set; }
        #endregion
        public override string ToString()
        {
            return string.Format("{0}: {1} - {2} ({3}) ['{4}' <==> '{5}']", Id, Title, SubTitle, Channel.ToString(), Start.ToString("yyyy/MM/dd hh:mm tt"), Stop.ToString("yyyy/MM/dd hh:mm tt"));
        }
    }
}