using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
using TechMedia.Backend.Vlc;
using TechMedia.Core;
using TechMedia.Core.Model;

namespace TechMedia.Interface.Wpf
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        public Track CurrentTrack { get; set; } = new();
        private readonly ITechMediaCore _player = new TechMediaCore(new VlcAudioBackend());
        public MainWindow()
        {
            InitializeComponent();
            DataContext = CurrentTrack;
            _player.RegisterPlaylistChangeListener(new Progress<List<Track>>(newPlaylist => TrackDataGrid.DataContext = newPlaylist));
        }

        private static string FormatMillis(int millis)
        {
            var seconds = millis / 1000;
            return $"{seconds / 60}:{(seconds % 60).ToString().PadLeft(2, '0')}";
        }
        
        private void PlayButtonClicked(object sender, EventArgs e)
        {
            var trackUpdater = new Progress<Track>(track =>
            {
                CurrentTrack = track;
                TitleLabel.Content = track.Title ?? "No title available";
                AlbumLabel.Content = track.Album ?? "No album available";
            });
            var progressUpdater = new Progress<float>(p =>
            {
                PlaybackProgressBar.Value = p;
                TimeLabel.Content = $"{FormatMillis((int)(CurrentTrack.Duration * p))}/{FormatMillis((int)(CurrentTrack.Duration))}";
            });
            PlaybackProgressBar.Maximum = 1.0f;
            _player.StartPlaylistPlayback(trackUpdater, progressUpdater);
        }

        private async void LoadButton_Click(object sender, RoutedEventArgs e)
        {
            var allFiles = Directory.EnumerateFiles(FilenameTextBox.Text, "*.*", SearchOption.AllDirectories).ToList();
            LoadProgressBar.Maximum = allFiles.Count;
            IProgress<int> progress = new Progress<int>(state =>
            {
                LoadProgressBar.Value = state;
                LoadingTextBlock.Text = $"Loading... {state}/{allFiles.Count}";
            });
            var loadedCount = await _player.LoadFiles(allFiles, progress);
            LoadingTextBlock.Text = $"Tracks loaded: {loadedCount}";
            LoadProgressBar.Value = LoadProgressBar.Maximum;
            MessageBox.Show($"Loaded {loadedCount} tracks");
            TrackDataGrid.DataContext = _player.GetCurrentPlaylist();
        }

        private void ShuffleButton_Click(object sender, RoutedEventArgs e)
        {
            TrackDataGrid.DataContext = _player.ShuffleCurrentPlaylist();
        }

        private void Button_Click(object sender, RoutedEventArgs e)
        {
            _player.Stop();
        }

        private void Button_Click_1(object sender, RoutedEventArgs e)
        {
            var requestedTrack = _player.SubmitRequest(RequestFilenameTextBox.Text);
            if (requestedTrack != null)
            {
                RequestStatusLabel.Content = $"{requestedTrack.Title} added to queue";
            }
            else
            {
                RequestStatusLabel.Content = "File not found in playlist";
            }
        }
    }
}