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

class SyncService {
  final LocalNoteRepository _local;
  final RemoteNoteRepository _remote;

  SyncService({
    required LocalNoteRepository local,
    required RemoteNoteRepository remote,
  })  : _local = local,
        _remote = remote;

  /// Push all local notes to the server, overwriting whatever is there.
  Future<void> pushAll() async {
    final notes = await _local.getAll();
    for (final note in notes) {
      try {
        await _remote.update(note);
      } catch (_) {
        // Note doesn't exist on server yet — create it
        await _remote.save(note);
      }
    }
  }

  /// Pull all notes from the server, overwriting local storage.
  Future<void> pullAll() async {
    final notes = await _remote.getAll();
    for (final note in notes) {
      await _local.save(note);
    }
  }

  /// Sync a single note by id — push local version to server.
  Future<void> syncNote(String id) async {
    final note = await _local.getById(id);
    if (note == null) return;
    try {
      await _remote.update(note);
    } catch (_) {
      await _remote.save(note);
    }
  }
}