import 'package:uuid/uuid.dart';

import '../models/note.dart';
import '../repositories/local_note_repository.dart';
import 'sync_service.dart';

class NoteService {
  final LocalNoteRepository _local;
  final SyncService? _sync;
  final _uuid = const Uuid();

  NoteService({
    required LocalNoteRepository local,
    SyncService? sync,
  })  : _local = local,
        _sync = sync;

  Future<List<Note>> getAllNotes() => _local.getAll();

  Future<Note> createNote({String title = '', String content = ''}) async {
    final note = Note(
      id: _uuid.v4(),
      title: title,
      content: content,
      createdAt: DateTime.now(),
      updatedAt: DateTime.now(),
    );
    await _local.save(note);
    return note;
  }

  Future<Note> updateNote(Note note) async {
    final updated = note.copyWith(updatedAt: DateTime.now());
    await _local.save(updated);
    return updated;
  }

  Future<void> deleteNote(String id) async {
    await _local.delete(id);
  }

  /// Manual backup — push everything to the server.
  Future<void> triggerBackup() async {
    if (_sync == null) throw Exception('Backup not configured');
    await _sync!.pushAll();
  }

  /// Restore — pull everything from the server.
  Future<void> triggerRestore() async {
    if (_sync == null) throw Exception('Backup not configured');
    await _sync!.pullAll();
  }
}