// Dialog capture harness — visual proof for dialogs the page-level
// guide harness doesn't reach. Renders the target dialog against
// the scriptable fake hub and writes a PNG per theme via a
// RepaintBoundary (driverless, headed macOS `flutter test`).
//
//   flutter test integration_test/dialog_shots_test.dart -d macos
//
// Output: build/dialog-shots/<name>-<theme>.png (or $DIALOG_SHOTS_OUT).

import 'dart:io';
import 'dart:ui' as ui;

import 'package:flutter/material.dart';
import 'package:flutter/rendering.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:integration_test/integration_test.dart';
import 'package:shared_preferences/shared_preferences.dart';

import 'package:chain_studio/l10n/app_localizations.dart';
import 'package:chain_studio/pages/federation.dart';

import '../test/support/fake_hub.dart';

final GlobalKey _shotKey = GlobalKey();

String get _outDir =>
    Platform.environment['DIALOG_SHOTS_OUT'] ?? 'build/dialog-shots';

Future<void> _shot(WidgetTester tester, String name) async {
  await tester.pump(const Duration(milliseconds: 150));
  await tester.pump(const Duration(milliseconds: 150));
  final boundary =
      _shotKey.currentContext!.findRenderObject() as RenderRepaintBoundary;
  final image = await boundary.toImage(pixelRatio: 2.0);
  final bytes = await image.toByteData(format: ui.ImageByteFormat.png);
  image.dispose();
  final file = File('$_outDir/$name.png');
  file.parent.createSync(recursive: true);
  file.writeAsBytesSync(bytes!.buffer.asUint8List());
  // ignore: avoid_print
  print('dialog-shot: ${file.path}');
}

void main() {
  IntegrationTestWidgetsFlutterBinding.ensureInitialized();

  for (final (themeName, mode) in [
    ('light', ThemeMode.light),
    ('dark', ThemeMode.dark),
  ]) {
    testWidgets('add-satellite dialog — $themeName', (tester) async {
      SharedPreferences.setMockInitialValues({});
      installFakeHub();
      await tester.pumpWidget(
        MaterialApp(
          debugShowCheckedModeBanner: false,
          themeMode: mode,
          theme: ThemeData.light(useMaterial3: true),
          darkTheme: ThemeData.dark(useMaterial3: true),
          localizationsDelegates: AppLocalizations.localizationsDelegates,
          supportedLocales: AppLocalizations.supportedLocales,
          locale: const Locale('de'),
          // Wrap the whole navigator (incl. the overlay dialogs
          // render into) so the capture catches the dialog, not
          // just the page beneath it.
          builder: (context, child) =>
              RepaintBoundary(key: _shotKey, child: child),
          home: const FederationPage(),
        ),
      );
      await tester.pump(const Duration(milliseconds: 200));
      await tester.tap(find.text('Satellit hinzufügen').first);
      await tester.pumpAndSettle();
      await _shot(tester, 'add-satellite-$themeName');
      expect(find.textContaining('Ein Satellit ist ein weiterer Hub'),
          findsOneWidget);
    });
  }
}