import 'package:flutter/widgets.dart';

import 'app_state.dart';

/// Makes [AppState] available to the widget tree and rebuilds dependents when
/// it changes. Deliberately dependency-free — no external state package.
class AppScope extends InheritedNotifier<AppState> {
  const AppScope({super.key, required AppState state, required super.child})
    : super(notifier: state);

  /// Subscribes the calling widget to changes.
  static AppState of(BuildContext context) {
    final scope = context.dependOnInheritedWidgetOfExactType<AppScope>();
    assert(scope != null, 'AppScope.of() called outside an AppScope');
    return scope!.notifier!;
  }

  /// Reads without subscribing — for callbacks and one-shot lookups.
  static AppState read(BuildContext context) {
    final scope = context.getInheritedWidgetOfExactType<AppScope>();
    assert(scope != null, 'AppScope.read() called outside an AppScope');
    return scope!.notifier!;
  }
}