import 'dart:async';
import 'dart:io';

import 'package:firebase_storage/firebase_storage.dart';
import 'package:uuid/uuid.dart';
export 'package:firebase_storage/firebase_storage.dart'
    show StorageUploadTask, StorageTaskSnapshot;

class FirebaseStorageProvider {
  final StorageReference _storage;
  final Uuid _uuid;
  // [FirebaseStorage] and [Uuid] instances can be injected for testing purposes.
  // Don't remove.
  FirebaseStorageProvider([StorageReference storage, Uuid uuid])
      : _storage = storage ?? FirebaseStorage.instance.ref(),
        _uuid = uuid ?? Uuid();

  // TODO: Sanitize the folder argument, it's too complicated.

  /// Uploads a given file to the firebase storage bucket.
  ///
  /// It returns a [StorageUploadTask] which contains the status of the upload.
  /// The [folder] parameter should not start with "/", but it should end with
  /// it. it allows the file to be stored at any path in the bucket.
  /// The [type] parameter allows you to specify the extension of the file bein
  /// uploaded, it defaults to png.
  StorageUploadTask uploadFile(File file,
      {String folder = '', String type = 'png'}) {
    final String fileId = _uuid.v1();
    final StorageReference fileReference =
        _storage.child('$folder/$fileId.$type');
    return fileReference.putFile(file);
  }

  /// Deletes a file from the firebase storage bucket given its path.
  Future<void> deleteFile(String path) {
    return _storage.child(path).delete();
  }
}

final storageProvider = FirebaseStorageProvider();