using FireSharp.Config;
using FireSharp.Interfaces;
using FireSharp.Response;
using Herse.Models;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.IO.Compression;

namespace SongCrawler
{
    class Program
    {
        static void Main(string[] args)
        {
            string controller = args[0];
            string songpath = args[1];
            IFirebaseConfig config = new FirebaseConfig
            {
                AuthSecret = "9BQHUEJhScgK2FP10hvlToxTlGQpXT94Cvx01piO",
                BasePath = "https://herse.firebaseio.com/"
            };
            FireSharp.FirebaseClient client = new FireSharp.FirebaseClient(config);
            string firepath = string.Format("controllers/{0}/songs", controller);

            List<string> files = new List<string>();
            files.AddRange(FindFiles("mp3", songpath));
            files.AddRange(FindFiles("zip", songpath));
            files.AddRange(FindFiles("mp4", songpath));
           
            List<Song> songs = new List<Song>();
            Song song = null; 
            int i = 0;
            foreach (string filepath in files)
            {
                i++;
                try
                {
                    song = MakeSong(filepath);
                    Console.WriteLine(string.Format("{0:000000}/{1} - {2}", i, files.Count, song.Title));
                    songs.Add(song);
                }
                catch(Exception ex)
                {
                    Console.WriteLine(ex.Message);
                }
            }
            SetResponse response = client.Set(firepath, songs);
        }

        private static Song MakeSong(string filepath)
        {
            
            Song song = null;
            var ext = Path.GetExtension(filepath).ToLower();
            switch (ext)
            {
                case ".mp3":
                case ".mp4":
                    song = ReadId3(filepath);
                    break;
                case ".zip":
                    song = ReadId3FromZip(filepath);
                    break;
            }
            CheckTitle(song);
            song.Path = filepath;
            return song; 
        }

        private static string[] FindFiles(string ext, string path)
        {
            Console.Write(string.Format("\rscanning {0} for {1} - ", path, ext));
            string[] files = Directory.GetFiles(path, "*." + ext, SearchOption.AllDirectories);
            Console.WriteLine(string.Format("{0} found", files.Length));
            return files; 
        }

        private static void CheckTitle(Song song)
        {
            if(string.IsNullOrEmpty(song.Title))
            {
                string file = Path.GetFileNameWithoutExtension(song.Path);
                string[] parts = file.Split('-');
                if (parts.Length == 1)
                {
                    song.Title = parts[0].Trim();
                }
                else if (parts.Length > 1)
                {
                    song.Artist = parts[parts.Length - 2].Trim();
                    song.Title = parts[parts.Length - 1].Trim();
                }
            }
        }

        private static Song ReadId3FromZip(string zippath)
        {
            ZipFile.ExtractToDirectory(zippath, "c:\\temp");
            string filepath = Directory.GetFiles("c:\\temp", "*.mp3")[0];
            Song song = ReadId3(filepath);
            foreach (string file in Directory.GetFiles("c:\\temp")) File.Delete(file);
            return song; 
        }

        static Song ReadId3(string path)
        {
            Song song = new Song();
            TagLib.File tagFile;
            try
            {
                tagFile = TagLib.File.Create(path);
                song.Title = tagFile.Tag.Title;
                song.Artist = tagFile.Tag.FirstPerformer;
                song.Genre = tagFile.Tag.FirstGenre;
                song.Year = (int)tagFile.Tag.Year;
            }
            catch
            {
                // do nothing; 
            }
            song.Path = path;
            return song;
        }
    }
}