import 'package:didvan/main.dart';
import 'package:didvan/models/enums.dart';
import 'package:didvan/utils/action_sheet.dart';
import 'package:flutter/cupertino.dart';

class CoreProvier with ChangeNotifier {
  AppState _appState = AppState.busy;

  /// وقتی provider dispose می‌شود این flag true می‌شود تا callback های
  /// async (مثل fetch network) که بعد از dispose برمی‌گردند و `update()` را
  /// صدا می‌زنند به جای throw، silently no-op شوند.
  bool _disposed = false;
  bool get isDisposed => _disposed;

  @override
  void dispose() {
    _disposed = true;
    super.dispose();
  }

  set appState(AppState newState) {
    if (_disposed) return;
    if (newState == AppState.isolatedBusy) {
      ActionSheetUtils(navigatorKey.currentContext!).showLogoLoadingIndicator();
    }
    if (_appState == AppState.isolatedBusy) {
      ActionSheetUtils(navigatorKey.currentContext!).pop();
    }
    _appState = newState;
    notifyListeners();
  }

  void update() {
    if (_disposed) return;
    notifyListeners();
  }

  AppState get appState => _appState;
}