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/download_manager.dart';
import 'package:jj_mkvmaker/app/i18n_controller.dart';
import 'package:jj_mkvmaker/app/settings.dart';
import 'package:jj_mkvmaker/core/models.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/downloads_page.dart';
import 'package:jj_mkvmaker/ui/explorer_page.dart';
import 'package:jj_mkvmaker/ui/home_page.dart';
import 'package:jj_mkvmaker/ui/monitor_page.dart';
import 'package:jj_mkvmaker/ui/settings_page.dart';
import 'package:jj_mkvmaker/ui/theme.dart';
import 'package:path/path.dart' as p;

import 'support/temp_dir.dart';

/// 253 · 255 · 256 (관리자 지시 10/21): test/large_text_test 의 화면들을 실제 글꼴로 - 글자 1.6배 (412×900 · 900×412 · 1280×800) 와
/// 폰 크기 글자 1.0 (412×900 세로 · 900×412 가로) 에서 넘치지 않고, 누르는 것 (단추 · 고르기 · 입력 칸) 이 화면 폭 안에 있다. ko · ja
void main() {
  IntegrationTestWidgetsFlutterBinding.ensureInitialized();
  // ⑦ 밝은 화면 캡처: JJ_SHOT_THEME=light (JJ_SHOT_DIR 를 따로 두어 어두운 것과 견줌)
  if (Platform.environment['JJ_SHOT_THEME'] == 'light') JjColors.use(Brightness.light);
  final out = Platform.environment['JJ_SHOT_DIR'] ?? '';
  final pages = <String, Widget Function(AppController, DownloadManager)>{
    'mkv': (c, d) => HomePage(c: c),
    'explorer': (c, d) => ExplorerPage(c: c),
    'rsync': (c, d) => ExplorerPage(c: c, rsync: true),
    'monitor': (c, d) => MonitorPage(c: c),
    'downloads': (c, d) => DownloadsPage(d: d),
    'settings': (c, d) => SettingsPage(c: c),
  };
  final cases = [
    for (final s in [const Size(412, 900), const Size(900, 412), const Size(1280, 800)]) (s, 1.6),
    for (final s in [const Size(412, 900), const Size(900, 412)]) (s, 1.0),
  ];
  for (final lang in ['ko', 'ja']) {
    for (final MapEntry(key: name, value: page) in pages.entries) {
      for (final (size, scale) in cases) {
        final tag = '${name}_${lang}_${size.width.round()}x${size.height.round()}_s$scale';
        testWidgets('253 · 255 · 256 $tag', (t) async {
          t.view.physicalSize = size;
          t.view.devicePixelRatio = 1;
          addTearDown(t.view.reset);
          await t.runAsync(() => i18n.apply(lang, save: false));
          addTearDown(() => i18n.apply('ko', save: false));
          final tmp = testTempDir('jj_bigtext_');
          appTempInto(tmp);
          final video = p.join(tmp.path, '아주 긴 이름의 동영상 파일 - 시험용 2026.mp4');
          File(video).writeAsStringSync('v');
          Directory(p.join(tmp.path, 'sub')).createSync();
          final c = AppController(PlatformServices(mediaTool: ProcessMediaTool('x', 'y'), storage: DesktopStorageService()));
          c.settings
            ..explorerPaths = [tmp.path, tmp.path]
            ..rsyncPaths = [tmp.path, tmp.path]
            ..copyTasks = [CopyTask(id: '1', sources: [tmp.path], dest: p.join(tmp.path, 'sub'), method: 'rsync', options: '-av')]
            ..liveSyncPairs = [LiveSyncPair(tmp.path, p.join(tmp.path, 'x'))];
          c.videos.add(VideoItem(video));
          // 256: 폰 가로에서 작업 기록을 켜도 목록이 여러 줄 보이는지 - 동영상 5개 · 기록 몇 줄
          for (var i = 2; i <= 5; i++) {
            final f = p.join(tmp.path, '에피소드 0$i.mp4');
            File(f).writeAsStringSync('v');
            c.videos.add(VideoItem(f));
          }
          for (var i = 1; i <= 3; i++) {
            c.note('시험 기록 $i');
          }
          c.selected = c.videos.first;
          final d = DownloadManager(backends: const [], settings: () => c.settings, readClipboard: () async => null);
          addTearDown(d.dispose);
          final shotKey = GlobalKey();
          await t.pumpWidget(RepaintBoundary(
            key: shotKey,
            child: MaterialApp(
              theme: buildTheme(),
              debugShowCheckedModeBanner: false,
              builder: (ctx, child) => MediaQuery(data: MediaQuery.of(ctx).copyWith(textScaler: TextScaler.linear(scale)), child: child!),
              home: page(c, d),
            ),
          ));
          for (var i = 0; i < 15; i++) {
            await t.runAsync(() => Future<void>.delayed(const Duration(milliseconds: 40)));
            await t.pump();
          }
          if (out.isNotEmpty) {
            final r = shotKey.currentContext!.findRenderObject()! as RenderRepaintBoundary;
            final img = await t.runAsync(() => r.toImage());
            final bytes = await t.runAsync(() => img!.toByteData(format: ui.ImageByteFormat.png));
            Directory(out).createSync(recursive: true);
            File(p.join(out, 'bigtext_$tag.png')).writeAsBytesSync(bytes!.buffer.asUint8List());
          }
          expect(t.takeException(), isNull, reason: '$tag 넘침');
          // 넘침 오류 없이 옆으로 밀려나는 것도 본다: 누르는 것은 화면 폭 안 (가로로 넘기는 막대 안의 것은 빼고)
          final hit = find.byWidgetPredicate((w) =>
              w is ButtonStyleButton || w is IconButton || w is Checkbox || w is DropdownButton || w is TextField || w is ChoiceChip || w is Radio);
          final off = <String>[];
          for (final e in hit.evaluate()) {
            final inRow = e.findAncestorWidgetOfExactType<SingleChildScrollView>()?.scrollDirection == Axis.horizontal ||
                e.findAncestorWidgetOfExactType<ListView>()?.scrollDirection == Axis.horizontal;
            if (inRow) continue;
            final r = t.getRect(find.byElementPredicate((x) => x == e));
            if (r.left < -0.5 || r.right > size.width + 0.5) off.add('${e.widget.runtimeType} $r');
          }
          expect(off, isEmpty, reason: '$tag: 화면 밖 ${off.join(' · ')}');
          await t.pumpWidget(const SizedBox());
          await t.pump(const Duration(seconds: 1));
        });
      }
    }
  }
}