import 'dart:io';

import 'package:flutter/material.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:integration_test/integration_test.dart';
import 'package:jj_mkvmaker/app/app_controller.dart';
import 'package:jj_mkvmaker/app/bookmarks_controller.dart';
import 'package:jj_mkvmaker/app/net_guard.dart';
import 'package:jj_mkvmaker/platform/windows/desktop_storage_service.dart';
import 'package:jj_mkvmaker/platform/windows/process_media_tool.dart';
import 'package:jj_mkvmaker/services/platform_services.dart';
import 'package:jj_mkvmaker/ui/app_actions.dart';
import 'package:jj_mkvmaker/ui/browser_page.dart';
import 'support/temp_dir.dart';
import 'package:path/path.dart' as p;

/// 250 실제 엔진 (Windows Edge WebView2): DNS 강제 서버에 닿지 않으면 (TEST-NET 192.0.2.1) 엔진의 오류 화면
/// (net::ERR_TUNNEL_CONNECTION_FAILED) 대신 앱의 덮개 "DNS 서버 (…) 에 닿지 않아 … 을(를) 열 수 없습니다" 가 뜨는지.
/// 데이터는 JJ_MKVMAKER_DATA (없으면 임시 폴더) 에만 - 사용자 앱 데이터를 건드리지 않는다.
void main() {
  IntegrationTestWidgetsFlutterBinding.ensureInitialized();

  testWidgets('250: 닿지 않는 DNS → 브라우저에 앱 덮개 (Edge 실제)', (tester) async {
    final data = Platform.environment['JJ_MKVMAKER_DATA'] ?? testTempDir('jj_dns_block_').path;
    Directory(data).createSync(recursive: true);
    final c = AppController(PlatformServices(mediaTool: ProcessMediaTool('x', 'y'), storage: DesktopStorageService()));
    c.settings
      ..webViewDataDir = p.join(data, 'webview')
      ..dnsMode = 'custom'
      ..dnsPrimary = '192.0.2.1'
      ..dnsSecondary = '';
    final logs = <String>[];
    final g = NetGuard.instance
      ..config = (() => c.settings.dnsConfig)
      ..log = logs.add;
    await tester.runAsync(g.ensure);
    Future<void> wait(int ms) async {
      for (var i = 0; i < ms ~/ 200; i++) {
        await tester.runAsync(() => Future<void>.delayed(const Duration(milliseconds: 200)));
        await tester.pump();
      }
    }

    final bm = BookmarksController(p.join(data, 'bm.json'));
    await tester.pumpWidget(MaterialApp(
      builder: (context, child) => AppScope(controller: c, bookmarks: bm, child: child!),
      home: BrowserPage(c: c, bookmarks: bm, initialUrl: 'https://example.org/'),
    ));
    final cover = find.textContaining('에 닿지 않아 example.org 을(를) 열 수 없습니다');
    for (var i = 0; i < 90 && cover.evaluate().isEmpty; i++) {
      await wait(400);
    }
    // ignore: avoid_print
    print('RESULT 덮개: ${cover.evaluate().isNotEmpty} / 알림: ${g.failure.value?.server} / 기록: ${c.logs.where((l) => l.contains('웹 페이지')).toList()}');
    expect(cover, findsOneWidget);
    expect(find.text('시스템 DNS 로 바꾸기'), findsWidgets);
    expect(find.text('다시 시도'), findsOneWidget);

    // [다시 시도]: 덮개를 걷고 다시 읽는다 → 여전히 닿지 않으니 다시 덮개
    await tester.tap(find.text('다시 시도'));
    await tester.pump();
    expect(cover, findsNothing);
    for (var i = 0; i < 90 && cover.evaluate().isEmpty; i++) {
      await wait(400);
    }
    // ignore: avoid_print
    print('RESULT 다시 시도 뒤 덮개: ${cover.evaluate().isNotEmpty}');
    expect(cover, findsOneWidget);

    await tester.pumpWidget(const SizedBox());
    await wait(1000);
    g.config = () => c.settings.dnsConfig;
  });
}