import 'dart:io';

import 'package:flutter/material.dart';
import 'package:flutter/rendering.dart';
import 'package:flutter/services.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:jj_mkvmaker/app/app_controller.dart';
import 'package:jj_mkvmaker/app/settings.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/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:path/path.dart' as p;

/// 241: TalkBack 이 읽는 이름이 없는 아이콘 버튼이 없다 (아이콘 크기의 누르는 곳 - 넓은 목록 줄은 안의 글을 읽는다).
/// 바깥 Tooltip 으로 감싼 IconButton · 이름 없는 InkResponse 는 Android 에 이름이 가지 않았다
void main() {
  late Directory tmp;
  setUp(() => tmp = Directory.systemTemp.createTempSync('jj_a11y_'));
  tearDown(() => tmp.deleteSync(recursive: true));

  Future<List<String>> unnamed(WidgetTester tester, Widget Function(AppController) page, double w) async {
    final handle = tester.ensureSemantics();
    // 설정 화면의 rsync 확인이 앱 폴더를 묻는다 (시험 환경에는 path_provider 가 없음)
    const pp = MethodChannel('plugins.flutter.io/path_provider');
    tester.binding.defaultBinaryMessenger.setMockMethodCallHandler(pp, (_) async => tmp.path);
    addTearDown(() => tester.binding.defaultBinaryMessenger.setMockMethodCallHandler(pp, null));
    tester.view.physicalSize = Size(w, 900);
    tester.view.devicePixelRatio = 1;
    addTearDown(tester.view.reset);
    final c = AppController(PlatformServices(mediaTool: ProcessMediaTool('x', 'y'), storage: DesktopStorageService()));
    File(p.join(tmp.path, 'a.txt')).writeAsStringSync('a');
    Directory(p.join(tmp.path, 'sub')).createSync();
    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'))];
    await tester.runAsync(() => tester.pumpWidget(MaterialApp(home: page(c))));
    for (var i = 0; i < 20; i++) {
      await tester.runAsync(() => Future<void>.delayed(const Duration(milliseconds: 30)));
      await tester.pump();
    }
    final out = <String>[];
    void walk(SemanticsNode n) {
      final d = n.getSemanticsData();
      final tappable = d.flagsCollection.isButton || d.hasAction(SemanticsAction.tap);
      if (!n.isMergedIntoParent &&
          tappable &&
          n.rect.width <= 72 &&
          n.rect.height >= 20 &&
          d.label.trim().isEmpty &&
          d.tooltip.trim().isEmpty &&
          d.value.trim().isEmpty) {
        out.add('${n.rect} (위: ${n.parent?.getSemanticsData().label})');
      }
      n.visitChildren((x) {
        walk(x);
        return true;
      });
    }

    walk(tester.binding.renderViews.first.owner!.semanticsOwner!.rootSemanticsNode!);
    handle.dispose();
    return out;
  }

  final pages = <String, Widget Function(AppController)>{
    'MKV': (c) => HomePage(c: c),
    '파일 탐색기': (c) => ExplorerPage(c: c),
    'Rsync': (c) => ExplorerPage(c: c, rsync: true),
    '모니터링': (c) => MonitorPage(c: c),
    '환경 설정': (c) => SettingsPage(c: c),
  };
  for (final MapEntry(key: name, value: page) in pages.entries) {
    for (final w in [500.0, 800.0, 1600.0]) {
      testWidgets('241: $name ($w) - 이름 없는 아이콘 버튼 없음', (tester) async {
        expect(await unnamed(tester, page, w), isEmpty);
      });
    }
  }
}