import 'package:flutter/material.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:ikar/core/config/app_message_status_size.dart';
import 'package:ikar/core/utils/haptics.dart';
import 'package:ikar/frontend/screens/profile/customization_section.dart';
import 'package:ikar/frontend/screens/profile/message_status_size_screen.dart';
import 'package:ikar/l10n/app_localizations.dart';
import 'package:ikar/main.dart' show api;
import 'package:shared_preferences/shared_preferences.dart';

final _slider = find.byKey(const ValueKey('message-status-size-slider'));
final _percent = find.byKey(const ValueKey('message-status-size-percent'));

Future<void> _pump(
  WidgetTester tester, {
  Widget home = const MessageStatusSizeScreen(),
  Brightness brightness = Brightness.light,
  Size size = const Size(360, 800),
  double textScale = 1,
}) async {
  tester.view.physicalSize = size;
  tester.view.devicePixelRatio = 1;
  addTearDown(tester.view.reset);
  await tester.pumpWidget(
    MaterialApp(
      locale: const Locale('ru'),
      localizationsDelegates: AppLocalizations.localizationsDelegates,
      supportedLocales: AppLocalizations.supportedLocales,
      theme: ThemeData(
        colorScheme: ColorScheme.fromSeed(
          seedColor: Colors.blue,
          brightness: brightness,
        ),
      ),
      builder: (context, child) => MediaQuery(
        data: MediaQuery.of(
          context,
        ).copyWith(textScaler: TextScaler.linear(textScale)),
        child: child!,
      ),
      home: home,
    ),
  );
  await tester.pump();
}

Future<void> _finishAnimations(WidgetTester tester) async {
  // The first frame lays out the expanded content and starts AnimatedSize.
  await tester.pump();
  await tester.pump(const Duration(milliseconds: 600));
  await tester.pump();
}

void _expectPreviewSize(WidgetTester tester, double scale) {
  for (final status in ['sent', 'delivered', 'read']) {
    final receipt = find.byKey(ValueKey('message-status-preview-$status'));
    final icon = tester.widget<Icon>(
      find.descendant(of: receipt, matching: find.byType(Icon)),
    );
    expect(icon.size, closeTo(14 * scale, 0.000001), reason: status);
  }
}

void main() {
  late bool hapticsEnabled;
  late bool fatalHitTestWarnings;

  setUpAll(() => api.state);
  setUp(() {
    SharedPreferences.setMockInitialValues({});
    AppMessageStatusSize.current.value = AppMessageStatusSize.defaultScale;
    hapticsEnabled = Haptics.enabled;
    Haptics.enabled = false;
    fatalHitTestWarnings = WidgetController.hitTestWarningShouldBeFatal;
    WidgetController.hitTestWarningShouldBeFatal = true;
  });
  tearDown(() {
    AppMessageStatusSize.current.value = AppMessageStatusSize.defaultScale;
    Haptics.enabled = hapticsEnabled;
    WidgetController.hitTestWarningShouldBeFatal = fatalHitTestWarnings;
  });

  testWidgets('Russian customization opens the continuous size slider', (
    tester,
  ) async {
    await _pump(
      tester,
      home: const Scaffold(
        body: SingleChildScrollView(child: CustomizationSection()),
      ),
    );
    expect(find.text('Галочки сообщений'), findsNothing);

    await tester.tap(find.text('Кастомизация'));
    await _finishAnimations(tester);
    await tester.tap(find.text('Галочки сообщений'));
    await _finishAnimations(tester);

    expect(find.byType(MessageStatusSizeScreen), findsOneWidget);
    final slider = tester.widget<Slider>(_slider);
    expect(slider.min, 1.0);
    expect(slider.max, 1.5);
    expect(slider.divisions, isNull);
    expect(slider.value, 1.0);
    expect(tester.widget<Text>(_percent).data, '100%');
    expect(find.text('Отправлено'), findsOneWidget);
    expect(find.text('Доставлено'), findsOneWidget);
    expect(find.text('Прочитано'), findsOneWidget);
    _expectPreviewSize(tester, 1.0);
    expect(
      tester
          .widget<TextButton>(find.widgetWithText(TextButton, 'Сбросить'))
          .onPressed,
      isNull,
    );
    expect(tester.takeException(), isNull);
  });

  testWidgets('drag updates previews and release saves before the debounce', (
    tester,
  ) async {
    await _pump(tester);
    final prefs = await SharedPreferences.getInstance();
    final rect = tester.getRect(_slider);
    final gesture = await tester.startGesture(rect.center);
    await gesture.moveTo(rect.center + Offset(rect.width * 0.08, 0));
    await tester.pump();

    final intermediate = AppMessageStatusSize.current.value;
    expect(intermediate, greaterThan(1.0));
    expect(intermediate, lessThan(1.5));
    expect(tester.widget<Slider>(_slider).value, intermediate);
    expect(
      tester.widget<Text>(_percent).data,
      '${(intermediate * 100).round()}%',
    );
    _expectPreviewSize(tester, intermediate);
    expect(prefs.getDouble(AppMessageStatusSize.prefKey), isNull);

    await gesture.up();
    await tester.pump();
    expect(prefs.getDouble(AppMessageStatusSize.prefKey), intermediate);

    await tester.drag(_slider, const Offset(2000, 0));
    await tester.pump();
    expect(AppMessageStatusSize.current.value, 1.5);
    expect(prefs.getDouble(AppMessageStatusSize.prefKey), 1.5);
    expect(tester.widget<Text>(_percent).data, '150%');
    _expectPreviewSize(tester, 1.5);

    await tester.tap(find.widgetWithText(TextButton, 'Сбросить'));
    await tester.pump();
    expect(AppMessageStatusSize.current.value, 1.0);
    expect(prefs.getDouble(AppMessageStatusSize.prefKey), 1.0);
    expect(tester.widget<Slider>(_slider).value, 1.0);
    _expectPreviewSize(tester, 1.0);
    expect(tester.takeException(), isNull);
  });

  testWidgets('leaving the screen flushes a size and reopening restores it', (
    tester,
  ) async {
    await _pump(
      tester,
      home: const Scaffold(
        body: SingleChildScrollView(child: CustomizationSection()),
      ),
    );
    await tester.tap(find.text('Кастомизация'));
    await _finishAnimations(tester);
    await tester.tap(find.text('Галочки сообщений'));
    await _finishAnimations(tester);

    tester.widget<Slider>(_slider).onChanged!(1.237);
    await tester.pump();
    Navigator.of(tester.element(find.byType(MessageStatusSizeScreen))).pop();
    await _finishAnimations(tester);

    final prefs = await SharedPreferences.getInstance();
    expect(prefs.getDouble(AppMessageStatusSize.prefKey), 1.237);
    AppMessageStatusSize.current.value = AppMessageStatusSize.defaultScale;
    expect(await AppMessageStatusSize.load(), 1.237);

    await tester.tap(find.text('Галочки сообщений'));
    await _finishAnimations(tester);
    expect(tester.widget<Slider>(_slider).value, 1.237);
    expect(tester.widget<Text>(_percent).data, '124%');
    _expectPreviewSize(tester, 1.237);
    expect(tester.takeException(), isNull);
  });

  for (final brightness in Brightness.values) {
    testWidgets('maximum size fits a small phone in ${brightness.name}', (
      tester,
    ) async {
      AppMessageStatusSize.current.value = AppMessageStatusSize.maxScale;
      await _pump(
        tester,
        brightness: brightness,
        size: const Size(320, 568),
        textScale: 1.3,
      );

      _expectPreviewSize(tester, 1.5);
      expect(tester.widget<Text>(_percent).data, '150%');
      expect(tester.takeException(), isNull);
      await tester.ensureVisible(find.widgetWithText(TextButton, 'Сбросить'));
      await tester.pump();
      await tester.tap(find.widgetWithText(TextButton, 'Сбросить'));
      await tester.pump();
      expect(AppMessageStatusSize.current.value, 1.0);
      expect(tester.takeException(), isNull);
    });
  }
}