import 'package:flutter/foundation.dart';

import 'social_connection.dart';
import 'social_settings.dart';

/// The one place that turns the sharing side of Tane on and off.
///
/// Sharing is opt-in: until someone joins it, the app opens no connection at
/// all and the seed book is entirely offline. Joining has to move three things
/// at once — the stored choice, the live relay connection, and the flag the UI
/// listens to — and doing that from several screens is how they drift apart.
/// So every caller (the community-rules gate, the invite sheet, the sharing
/// setup) goes through here instead.
class SharingSwitch {
  SharingSwitch({
    required SocialSettings settings,
    SocialConnection? connection,
    bool enabled = false,
  })  : _settings = settings,
        _connection = connection,
        on = ValueNotifier(enabled);

  final SocialSettings _settings;
  final SocialConnection? _connection;

  /// Whether sharing is on right now. Screens listen so the drawer's social
  /// entries light up the moment someone joins, with no restart.
  final ValueNotifier<bool> on;

  Future<void> enable() async {
    await _settings.setSharingEnabled(true);
    // Safe to call even if it is already running: `start` guards itself.
    _connection?.start();
    on.value = true;
  }

  /// Turning it off must actually go offline — closing the live session, not
  /// just recording the choice for the next launch.
  Future<void> disable() async {
    await _settings.setSharingEnabled(false);
    await _connection?.stop();
    on.value = false;
  }

  void dispose() => on.dispose();
}