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:image/image.dart' as img;
import 'package:integration_test/integration_test.dart';
import 'package:jj_mkvmaker/app/app_controller.dart';
import 'package:jj_mkvmaker/core/reader_sources.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/reader_page.dart';
import 'package:jj_mkvmaker/ui/theme.dart';
import 'package:path/path.dart' as p;

/// ⑦ 밝은 화면 (관리자 지시 10/21): 보기 화면 (그림 · 위아래 막대 · 썸네일 줄) 을 PNG 로 (JJ_SHOT_DIR, JJ_SHOT_THEME=light).
/// 시험 그림은 임시 폴더에만 만들고 끝나면 지운다
void main() {
  IntegrationTestWidgetsFlutterBinding.ensureInitialized();
  if (Platform.environment['JJ_SHOT_THEME'] == 'light') JjColors.use(Brightness.light);

  testWidgets('보기 화면 그림', (t) async {
    final out = Platform.environment['JJ_SHOT_DIR'] ?? p.join(Directory.systemTemp.path, 'jj_shots_reader');
    Directory(out).createSync(recursive: true);
    final tmp = Directory.systemTemp.createTempSync('jj_readershot_');
    addTearDown(() => tmp.deleteSync(recursive: true));
    final paths = <String>[];
    for (var i = 0; i < 4; i++) {
      final im = img.Image(width: 600, height: 400);
      img.fill(im, color: img.ColorRgb8(40 + i * 50, 120, 200 - i * 40));
      img.drawString(im, 'page ${i + 1}', font: img.arial48, x: 200, y: 170);
      final f = File(p.join(tmp.path, 'p${i + 1}.png'))..writeAsBytesSync(img.encodePng(im));
      paths.add(f.path);
    }
    final c = AppController(PlatformServices(mediaTool: ProcessMediaTool('x', 'y'), storage: DesktopStorageService()));
    final key = GlobalKey();
    for (final (name, size) in [('960', const Size(960, 600)), ('412', const Size(412, 800))]) {
      t.view.physicalSize = size;
      t.view.devicePixelRatio = 1;
      await t.runAsync(() => t.pumpWidget(RepaintBoundary(
            key: key,
            child: MaterialApp(
              theme: buildTheme(),
              debugShowCheckedModeBanner: false,
              home: ReaderPage(c: c, source: ImageFilesSource(paths, tempDir: tmp.path, title: 'shot'), start: 1),
            ),
          )));
      for (var i = 0; i < 20; i++) {
        await t.runAsync(() => Future<void>.delayed(const Duration(milliseconds: 100)));
        await t.pump(const Duration(milliseconds: 50));
      }
      final boundary = key.currentContext!.findRenderObject()! as RenderRepaintBoundary;
      final image = await t.runAsync(() => boundary.toImage());
      final bytes = await t.runAsync(() => image!.toByteData(format: ui.ImageByteFormat.png));
      File(p.join(out, 'reader_$name.png')).writeAsBytesSync(bytes!.buffer.asUint8List());
      await t.pumpWidget(const SizedBox());
    }
    t.view.reset();
  });
}