#define OVERRIDE_COMMANDLINE_ARGUMENTS // when defined will override supplied commandline args
using System;
using System.Collections.Generic;
using System.Text;
using System.Linq;
using Enterprise.Logging;
using System.Windows.Forms;
using System.Diagnostics;
using System.IO;
using libxmltv.Core;
using libxmltv.Interfaces;
using libxmltv;
namespace GBPVRProgramDatabaseFixer
{
    class Program
    {
        static SQLLITE sqlite;
        static string XMLTV_FILE = "";
        static string GBPVR_DATABASE = "";

        static bool LOADING_XMLTV_FILE = false;
        static bool XMLTV_INSTANCE_CREATED = false;
        static int LAST_REPORTED_XMLTV_PROGRESS = 0;


        static bool LOADING_GBPVR_DATABASE = false;
        static bool SQLLIST_INSTANCE_CREATED = false;
        static int LAST_REPORTED_SQLLITE_PROGRESS = 0;

        static FileInfo fi_XMLTVFILE;
        static FileInfo fi_GBPVRDATABASE;
        static void CreateLog()
        {
            string log_path = Application.StartupPath;
            string log_filename = string.Format("{0}.log", typeof(Program).Assembly.GetName().Name);
            gLog.CreateLog(string.Format(@"{0}\{1}", log_path, log_filename), false, LogLevel.kLogLevel_All);
#if DEBUG
            LogLevel gLevel = gLog.LogLevel;
            gLevel |= LogLevel.kLogLevel_VerboseDebug;
            gLevel |= LogLevel.kLogLevel_Debug;
            gLog.SetLogLevel(gLevel);
#else
            LogLevel gLevel = LogLevel.kLogLevel_Default; // set the default log level: Info, Warn, Error, Debug
            // it is OK for kLogLevel_Debug to be set in Release mode ... must of the chatty messages are from kLogLevel_VerboseDebug
            gLevel &= ~LogLevel.kLogLevel_Debug; // ensure this is not set, ever in release mode         
            gLevel &= ~LogLevel.kLogLevel_VerboseDebug; // ensure this is not set, ever in release mode         
            gLog.SetLogLevel(gLevel);
#endif
            gLog.ReportProgressEvent += new EventHandler<ReportProgressEventArgs>(gLog_ReportProgress);
        }

        [Conditional("OVERRIDE_COMMANDLINE_ARGUMENTS")]
        static void CreateDebugCommandlineArgs(ref List<string> cargs)
        {
           cargs = new List<string>();
            cargs.Add(string.Format("--xmltv_file=\"{0}\"", @"c:\EPG Guide\Guide\tvguide.xml"));
            cargs.Add(string.Format("--gbprv_db=\"{0}\"", @"c:\Program Files (x86)\Devnz\GBPVR\gbpvr.db3"));
        }

        static List<string> CreateCommandlineArgs(string[] args)
        {
            List<string> cargs = new List<string>(args);
            CreateDebugCommandlineArgs(ref cargs);
            return cargs;
        }

        static void Main(string[] args)
        {
            CreateLog();
            var cargs = CreateCommandlineArgs(args);
            foreach (var carg in cargs)
            {
                if (carg.ToLower().Contains("--xmltv_file="))
                {
                    XMLTV_FILE = carg.Replace("--xmltv_file=", "").Replace("\"","");
                    gLog.Info.WriteLine("XMLTV FILE: '{0}'", XMLTV_FILE);
                }
                else if (carg.ToLower().Contains("--gbprv_db="))
                {
                    GBPVR_DATABASE = carg.Replace("--gbprv_db=", "").Replace("\"", "");
                    gLog.Info.WriteLine("GBPVR DATABASE: '{0}'", GBPVR_DATABASE);
                }
                else
                {
                    gLog.Warn.WriteLine("Unknown commandline option: {0}", carg);
                }
            }

            LoadXMLTVFile();
            LoadGBPVRDatabase();
            PerformDatabaseProcessing();       
        }

        static void ConsoleOverwritePreviosLine(string format, params object[] args)
        {
            Console.WriteLine(format,args);
            Console.SetCursorPosition(0, Console.CursorTop - 1);
        }

        static void gLog_ReportProgress(object sender, ReportProgressEventArgs e) 
        {
            if (!XMLTV_INSTANCE_CREATED && LOADING_XMLTV_FILE)
            {
                if (LAST_REPORTED_XMLTV_PROGRESS != e.Progress)
                {
                    ConsoleOverwritePreviosLine("XMLTV: {0} Loading: {1:00}%", fi_XMLTVFILE.Name, e.Progress);
                    LAST_REPORTED_XMLTV_PROGRESS = e.Progress;
                    if (e.Progress == 100)
                    {
                        Console.WriteLine("XMLTV: {0} Loading: {1:00}%", fi_XMLTVFILE.Name, e.Progress);
                    }
                }
            }
            if (!SQLLIST_INSTANCE_CREATED && LOADING_GBPVR_DATABASE)
            {
                if (LAST_REPORTED_SQLLITE_PROGRESS != e.Progress)
                {
                    ConsoleOverwritePreviosLine("SQLLITE: {0} Loading: {1:00}%", fi_XMLTVFILE.Name, e.Progress);
                    LAST_REPORTED_SQLLITE_PROGRESS = e.Progress;
                    if (e.Progress == 100)
                    {
                        Console.WriteLine("SQLLITE: {0} Loading: {1:00}%", fi_XMLTVFILE.Name, e.Progress);
                    }
                }
            }
        }
        static void LoadXMLTVFile()
        {
            LOADING_XMLTV_FILE = true;
            if (string.IsNullOrEmpty(XMLTV_FILE))
            {
                gLog.Error.WriteLine("XMLTV File is either a null or empty string.");
                LOADING_XMLTV_FILE = false;
                return;
            }
            fi_XMLTVFILE = new FileInfo(XMLTV_FILE);
            if (!fi_XMLTVFILE.Exists)
            {
                gLog.Error.WriteLine("Could not find XMLTV File: {0}", fi_XMLTVFILE.FullName);
                LOADING_XMLTV_FILE = false;
                return;
            }

            XMLTV.Create(fi_XMLTVFILE.FullName, new EventHandler<EventArgs>(XMLTV_OnInstanceCreated));
            while (!XMLTV_INSTANCE_CREATED) { Application.DoEvents(); }
            LOADING_XMLTV_FILE = false;
        }
        static void XMLTV_OnInstanceCreated(object sender, EventArgs e) { XMLTV_INSTANCE_CREATED = true; }

        static void LoadGBPVRDatabase()
        {
            LOADING_GBPVR_DATABASE = true;
            if (string.IsNullOrEmpty(GBPVR_DATABASE))
            {
                gLog.Error.WriteLine("GBPVR Datbase is either a null or empty string.");
                LOADING_GBPVR_DATABASE = false;
                return;
            }
            fi_GBPVRDATABASE = new FileInfo(GBPVR_DATABASE);
            if (!fi_GBPVRDATABASE.Exists)
            {
                gLog.Error.WriteLine("Could not find GBPVR Database: {0}", fi_GBPVRDATABASE.FullName);
                LOADING_GBPVR_DATABASE = false;
                return;
            }

            sqlite = new SQLLITE(fi_GBPVRDATABASE.FullName, new EventHandler<EventArgs>(SQLLITE_OnInstanceCreated));
            while (!SQLLIST_INSTANCE_CREATED) { Application.DoEvents(); }
            LOADING_GBPVR_DATABASE = false;
        }
        static void SQLLITE_OnInstanceCreated(object sender, EventArgs e) { SQLLIST_INSTANCE_CREATED = true; }


        static List<SQLLITE.IPROGRAMME> gbpvr_programs;
        static List<SQLLITE.ICHANNEL> gbpvr_channels;
        static List<SQLLITE.IRECORDING_SCHEDULE> gbpvr_recordings;
        static IProgramDefinitionList xmltv_programs;
        static void PerformDatabaseProcessing()
        {
            gbpvr_channels = sqlite.Channels;
            gbpvr_programs = sqlite.Programs;
            gbpvr_recordings = sqlite.Recordings;            
            Type datatype;
            xmltv_programs = (IProgramDefinitionList)XMLTV.CreateBindingSourceFromData(XMLTV.GetPrograms(), out datatype);
            CheckScheduledRecordingsForDiscrepancies();
            CheckProgramsForDiscrepancies();
        }

        static void CheckScheduledRecordingsForDiscrepancies()
        {
            //gLog.Warn.WriteLine("CheckScheduledRecordingsForDiscrepancies() has not been implemented");
            var manual_gbpvr_recordings = gbpvr_recordings.FindAll(p => p.recording_type == 0).ToList();

            foreach (var manual_recording in manual_gbpvr_recordings)
            {
                string title = manual_recording.filename;
                DateTime start = manual_recording.manual_start_time;
                DateTime end = manual_recording.manual_end_time;

                var found_program = xmltv_programs.ToList().Find(p => 
                    p.Title.ToLower() == title.ToLower() && 
                    p.Start == start.ToDateTimeString() &&
                    p.Stop == end.ToDateTimeString()
                    );

                if (found_program != null)
                {
                    gLog.Info.WriteLine("Recording might be valid: oid='{0}' programme_oid='{1}' title='{2}' start='{3}', end='{4}'", manual_recording.oid, manual_recording.programme_oid, title, start.ToDateTimeString(), end.ToDateTimeString());
                }
                else
                {
                    gLog.Warn.WriteLine("Recording may not be valid: oid='{0}' programme_oid='{1}' title='{2}' start='{3}', end='{4}'", manual_recording.oid, manual_recording.programme_oid, title, start.ToDateTimeString(), end.ToDateTimeString());
                }
                //bool entry_valid = false;
                //if (found_programs.Count == 0)
                //{
                //    gLog.Warn.WriteLine("Could not find an XMLTV Program with title: '{0}'", title);
                //}
                //foreach (var found_program in found_programs)
                //{                    
                //    entry_valid = (found_program.Start == start.ToDateTimeString());
                //    entry_valid = (found_program.Stop == end.ToDateTimeString());
                //}
                //if (!entry_valid)
                //{
                //    gLog.Warn.WriteLine("Recording: oid='{0}' programme_oid='{1}' title='{2}' start='{3}', end='{4}' may not be valid", manual_recording.oid, manual_recording.programme_oid, title, start.ToDateTimeString(), end.ToDateTimeString());
                //}
            }
        }

        static void CheckProgramsForDiscrepancies()
        {
            gLog.Warn.WriteLine("CheckProgramsForDiscrepancies() has not been implemented");
        }
    }
}