fin-tracker/app/lib/features/portfolio/scope_selector.dart

import 'package:fintracker_api/fintracker_api.dart';
import 'package:flutter/material.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';

import '../../core/widgets/async_value_view.dart';
import 'providers.dart';

/// Switches every portfolio screen at once. Hidden while there is nothing to choose
/// between — a dropdown with one option is furniture, not a control.
class ScopeSelector extends ConsumerWidget {
  const ScopeSelector({super.key});

  @override
  Widget build(BuildContext context, WidgetRef ref) {
    final scopes = ref.watch(scopesProvider);
    final current = ref.watch(scopeProvider);

    return AsyncValueView<List<ScopeOut>>(
      value: scopes,
      data: (rows) {
        if (rows.length < 2) return const SizedBox.shrink();
        final known = rows.any((s) => s.scope == current)
            ? current
            : rows.first.scope;
        return DropdownButtonHideUnderline(
          child: DropdownButton<String>(
            value: known,
            borderRadius: BorderRadius.circular(8),
            items: [
              for (final s in rows)
                DropdownMenuItem(
                  value: s.scope,
                  child: Text(s.name, overflow: TextOverflow.ellipsis),
                ),
            ],
            onChanged: (value) {
              if (value != null) ref.read(scopeProvider.notifier).state = value;
            },
          ),
        );
      },
    );
  }
}