import 'package:mc_gallery/features/core/services/logging_service.dart';
import 'package:mc_gallery/features/home/data/models/image_model.dart';
import 'package:mc_gallery/locator.dart';

import '../abstracts/images_api.dart';

/// Handles fetching and storing of Images.
///
/// Since this is very simple use-case, this is the only interface. For complex (actual CRUD-based) I/O,
/// an additional Repository layer interface can be used between [ImagesService] and [ImagesApi].
class ImagesService {
  ImagesService({
    required ImagesApi imagesApi,
    required LoggingService loggingService,
  })  : _imagesApi = imagesApi,
        _loggingService = loggingService {
    _init();
  }

  final ImagesApi _imagesApi;
  final LoggingService _loggingService;

  late final Iterable<ImageModel> _imageModels;
  Iterable<ImageModel> get imageModels => _imageModels;

  Future<void> _init() async {
    _loggingService.info('Fetching and creating image models...');
    _imageModels = await _imagesApi.fetchImageUri(token: '');

    _imageModels.isNotEmpty
        ? _loggingService.good("Created ${_imageModels.length} images' models")
        : _loggingService.warning('No images found');

    Locator.instance().signalReady(this);
  }

  int get firstAvailableImageIndex => 0;
  int get lastAvailableImageIndex => _imageModels.length - 1;

  static ImagesService get locate => Locator.locate();
}