import 'package:flutter/material.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:manager/app.dart';
import 'package:manager/core/utils/shared_preferences_provider.dart';
import 'package:shared_preferences/shared_preferences.dart';

Future<void> _pumpApp(WidgetTester tester, Map<String, Object> prefsValues) async {
  // Wide enough that NavRailShell renders its expanded (non-narrow) rail,
  // which is what shows the "NodeMaster" wordmark asserted on below.
  tester.view.physicalSize = const Size(1280, 800);
  tester.view.devicePixelRatio = 1.0;
  addTearDown(tester.view.resetPhysicalSize);
  addTearDown(tester.view.resetDevicePixelRatio);

  SharedPreferences.setMockInitialValues(prefsValues);
  final prefs = await SharedPreferences.getInstance();

  await tester.pumpWidget(
    ProviderScope(
      // Matches main.dart: no container-wide auto-retry, so a deliberately
      // unreachable test connection settles into AsyncError deterministically
      // instead of retrying with backoff mid-test.
      retry: (retryCount, error) => null,
      overrides: [sharedPreferencesProvider.overrideWithValue(prefs)],
      child: const App(),
    ),
  );
  await tester.pumpAndSettle();
}

void main() {
  testWidgets('redirects to Settings when no connection is configured', (tester) async {
    await _pumpApp(tester, {});

    expect(find.text('NodeMaster'), findsOneWidget);
    // The router redirect lands on Settings — its "Connections" block
    // header (unique to that screen) proves we're actually there, not
    // just that the nav rail lists the label.
    expect(find.text('Connections'), findsOneWidget);
  });

  testWidgets('launches on the Dashboard when a connection is configured', (tester) async {
    await _pumpApp(tester, {
      // Port 1 refuses immediately rather than hanging until a timeout,
      // so the test doesn't depend on real network access or reachability
      // — only on routing/shell behavior once a connection exists.
      'connections': '[{"id":"conn_test","name":"Test","baseUrl":"http://127.0.0.1:1"}]',
      'active_connection_id': 'conn_test',
    });

    expect(find.text('NodeMaster'), findsOneWidget);
    expect(find.text('Dashboard'), findsWidgets);
    expect(find.text('Services'), findsOneWidget);
    expect(find.text('Settings'), findsOneWidget);
  });
}