import 'dart:io';

import 'package:path/path.dart' as p;

import '../entities/album.dart';

class AlbumRepository {
  final String basePath;
  final List<Album> _albums = List.empty(growable: true);
  DateTime _updated = DateTime.utc(1970);

  AlbumRepository({required this.basePath});

  Future<List<Album>> getAllAlbums() async {
    if (DateTime.now().difference(_updated).inSeconds <= 60) {
      return _albums;
    }
    _updated = DateTime.now();

    final dir = Directory(basePath);
    if (!await dir.exists()) {
      return [];
    }

    var albums = await dir
        .list()
        .where((d) => d is Directory)
        .map((d) => d as Directory)
        .map((dir) {
          final name = p.basename(dir.path);
          return Album(
            id: dir.path.hashCode,
            name: name,
            createdAt: dir.statSync().changed,
            updatedAt: dir.statSync().changed,
          );
        })
        .toList();
    _albums.clear();
    _albums.addAll(albums);
    return albums;
  }

  Future<Album?> getAlbumById(int id) async {
    final albums = await getAllAlbums();
    return albums.where((a) => a.id == id).firstOrNull;
  }
}