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:jj_mkvmaker/app/app_controller.dart';
import 'package:jj_mkvmaker/app/i18n_controller.dart' show i18n;
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/settings_page.dart';
import 'package:jj_mkvmaker/ui/theme.dart';

/// 설정 B: 환경 설정 화면 전체 (모든 분야) 를 실제 글꼴로 3개 언어 × 412 · 960 폭으로 그려 PNG 로 (JJ_SHOT_DIR).
/// 나누기 전후 같은지 픽셀로 견준다. 넘침 (RenderFlex overflow) 이 있으면 시험이 실패한다. 설정은 메모리에만 (저장소 없음)
void main() {
  IntegrationTestWidgetsFlutterBinding.ensureInitialized();

  testWidgets('환경 설정 전체: ko · en · ja × 412 · 960', (tester) async {
    final out = Platform.environment['JJ_SHOT_DIR'] ?? Directory.systemTemp.path;
    final c = AppController(PlatformServices(mediaTool: ProcessMediaTool('x', 'y'), storage: DesktopStorageService()));
    final key = GlobalKey();
    for (final lang in ['ko', 'en', 'ja']) {
      await tester.runAsync(() => i18n.apply(lang, save: false));
      for (final w in [412.0, 960.0]) {
        tester.view.devicePixelRatio = 1;
        tester.view.physicalSize = Size(w, 900);
        await tester.pumpWidget(MaterialApp(theme: buildTheme(), home: RepaintBoundary(key: key, child: SettingsPage(c: c))));
        await tester.pumpAndSettle();
        // 모든 분야가 한 장에 들어오게 화면을 늘린다
        final scroll = tester.state<ScrollableState>(find.byType(Scrollable).last).position;
        tester.view.physicalSize = Size(w, (900 + scroll.maxScrollExtent).clamp(900, 30000).toDouble());
        await tester.pumpAndSettle();
        final boundary = key.currentContext!.findRenderObject()! as RenderRepaintBoundary;
        final image = await tester.runAsync(() => boundary.toImage());
        final bytes = await tester.runAsync(() => image!.toByteData(format: ui.ImageByteFormat.png));
        File('$out/settings_${lang}_${w.toInt()}.png').writeAsBytesSync(bytes!.buffer.asUint8List());
      }
    }
    await tester.runAsync(() => i18n.apply('ko', save: false));
    tester.view.reset();
  });
}