// selected_node_persist_test.dart — 选中节点(智能/具体)跨重启持久化,供自动连接复用上次选择。
import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:pangolin_vpn/models/node.dart';
import 'package:pangolin_vpn/state/nodes_provider.dart';
import 'package:shared_preferences/shared_preferences.dart';

void main() {
  TestWidgetsFlutterBinding.ensureInitialized();
  setUp(() => SharedPreferences.setMockInitialValues({}));

  Future<void> waitSelected(ProviderContainer c, String want) async {
    for (var i = 0; i < 60; i++) {
      if (c.read(selectedNodeCodeProvider) == want) return;
      await Future<void>.delayed(const Duration(milliseconds: 10));
    }
  }

  test('默认智能选择(AUTO)', () async {
    final c = ProviderContainer();
    addTearDown(c.dispose);
    expect(c.read(selectedNodeCodeProvider), kSmartNodeCode);
  });

  test('select 具体节点 → 落盘', () async {
    final c = ProviderContainer();
    addTearDown(c.dispose);
    await waitSelected(c, kSmartNodeCode); // 等 _load
    await c.read(selectedNodeCodeProvider.notifier).select('JP');
    expect(c.read(selectedNodeCodeProvider), 'JP');
    final p = await SharedPreferences.getInstance();
    expect(p.getString('selected_node_code'), 'JP', reason: '应持久化');
  });

  test('重启从持久化恢复具体节点', () async {
    SharedPreferences.setMockInitialValues({'selected_node_code': 'JP'});
    final c = ProviderContainer();
    addTearDown(c.dispose);
    await waitSelected(c, 'JP');
    expect(c.read(selectedNodeCodeProvider), 'JP', reason: '重启应恢复上次选择');
  });

  test('重启恢复智能选择(AUTO 持久化)', () async {
    SharedPreferences.setMockInitialValues({'selected_node_code': kSmartNodeCode});
    final c = ProviderContainer();
    addTearDown(c.dispose);
    await waitSelected(c, kSmartNodeCode);
    expect(c.read(selectedNodeCodeProvider), kSmartNodeCode);
  });
}