using KaraokePlayer;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.IO;
using System.Windows.Forms;
using Herse.Models;
using System.IO.Compression;

namespace KaraokePlayer
{
    public class PlayerWrapper
    {
        private KaraokeVideoPlayer currentPlayer = null;
        private KaraokeVideoPlayer mp4Player;
        private KaraokeVideoPlayer cdgPlayer;
        public Song Song { get; set; }

        public delegate void SongEndedEventHandler();
        public SongEndedEventHandler OnSongEnded { get; set; }

        public PlayerWrapper(KaraokeVideoPlayer cdgPlayer, KaraokeVideoPlayer mp4Player)
        {
            cdgPlayer.setup(true, true);
            mp4Player.setup(false, true);
            cdgPlayer.songEndedHandler += new KaraokePlayer.KaraokeVideoPlayer.SongEndedEventHandler(this.karaokePlayerSongEnded);
            mp4Player.songEndedHandler += new KaraokePlayer.KaraokeVideoPlayer.SongEndedEventHandler(this.karaokePlayerSongEnded);
            cdgPlayer.Dock = DockStyle.Fill;
            mp4Player.Dock = DockStyle.Fill;
            this.mp4Player = mp4Player;
            this.cdgPlayer = cdgPlayer;
        }

        private void karaokePlayerSongEnded(object sender, EventArgs e)
        {
            if (OnSongEnded != null) OnSongEnded();
        }

        public void stop()
        {
            if (currentPlayer == null) return;
            currentPlayer.Stop();
        }

        public void pause()
        {
            if (currentPlayer == null) return;
            currentPlayer.Pause();
        }

        public void play()
        {
            if (Song == null) return;
            if (currentPlayer != null && currentPlayer.isPaused)
            {
                currentPlayer.Resume();
                return;
            }
            switch (Song.FileType)
            {
                case FileType.CDG:
                    PlayCdg();
                    break;
                case FileType.ZIP:
                    PlayZip();
                    break;
                case FileType.MP4:
                    PlayM4p();
                    break;
            }
        }

        private void PlayM4p()
        {
            currentPlayer = mp4Player;
            mp4Player.Play(new Uri(Song.Path));
            mp4Player.Visible = true;
            cdgPlayer.Visible = false;
            cdgPlayer.Stop();
        }

        private void PlayZip()
        {
            string playPath = null;
            string extractPath = Path.Combine(Directory.GetCurrentDirectory(), "temp");
            try
            {
                DeleteDirectory(extractPath);
            }
            catch(Exception)
            {
                // do nothing
            }
            Directory.CreateDirectory(extractPath);
            using (ZipArchive archive = ZipFile.OpenRead(Song.Path))
            {
                foreach (ZipArchiveEntry entry in archive.Entries)
                {
                    if (entry.FullName.EndsWith(".mp3", StringComparison.OrdinalIgnoreCase))
                    {
                        playPath = Path.Combine(extractPath, entry.FullName);
                    }
                    entry.ExtractToFile(Path.Combine(extractPath, entry.FullName));
                }
            }
            if (!string.IsNullOrEmpty(playPath))
            {
                currentPlayer = cdgPlayer;
                cdgPlayer.Play(new Uri(playPath));
                cdgPlayer.Visible = true;
                mp4Player.Visible = false;
                mp4Player.Stop();
            }
        }

        private void PlayCdg()
        {
            currentPlayer = cdgPlayer;
            cdgPlayer.Play(new Uri(Path.ChangeExtension(Song.Path, ".mp3")));
            cdgPlayer.Visible = true;
            mp4Player.Visible = false;
            mp4Player.Stop();
        }

        private void DeleteDirectory(string target_dir)
        {
            if (!Directory.Exists(target_dir)) { return; }
            string[] files = Directory.GetFiles(target_dir);
            string[] dirs = Directory.GetDirectories(target_dir);

            foreach (string file in files)
            {
                File.SetAttributes(file, FileAttributes.Normal);
                File.Delete(file);
            }

            foreach (string dir in dirs)
            {
                DeleteDirectory(dir);
            }

            Directory.Delete(target_dir, false);
        }
    }
}