using Harmonia.Core.Player;
using Harmonia.Core.Playlists;
using System;
using System.Linq;

namespace Harmonia.WinUI.Session;

public class SessionRestorer(
    ISessionService sessionService,
    IPlaylistManager playlistManager,
    IAudioPlayer audioPlayer) : ISessionRestorer
{
    public void Restore()
    {
        RestorePlaylist();
        RestoreAudioPlayer();
    }

    private void RestorePlaylist()
    {
        PlaylistState playlistState = sessionService.Session.Playlist;

        if (string.IsNullOrWhiteSpace(playlistState.OpenPlaylistUID))
            return;

        Playlist? playlist = playlistManager.Playlists.FirstOrDefault(p => p.UID == playlistState.OpenPlaylistUID);

        if (playlist is null)
            return;

        playlistManager.CurrentPlaylist = playlist;
    }

    private void RestoreAudioPlayer()
    {
        AudioPlayerState audioPlayerState = sessionService.Session.Player;

        if (string.IsNullOrWhiteSpace(audioPlayerState.PlaylistSongUID))
            return;

        Playlist? playlist = playlistManager.FindPlaylistContaining(audioPlayerState.PlaylistSongUID);

        if (playlist is null)
            return;

        PlaylistSong? song = playlist.Songs.FirstOrDefault(s => s.UID == audioPlayerState.PlaylistSongUID);

        if (song is null)
            return;

        //PlaybackMode playbackMode = audioPlayerState.PlaybackState

        audioPlayer.LoadAsync(song, PlaybackMode.LoadOnly);
    }
}