import 'package:flutter/cupertino.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:please_pay_me/app/app.dart';
import 'package:please_pay_me/core/config/app_config.dart';
import 'package:please_pay_me/core/storage/session_storage.dart';
import 'package:please_pay_me/data/demo/demo_backend.dart';
import 'package:please_pay_me/features/auth/session_controller.dart';
import 'package:please_pay_me/theme/theme.dart';

import 'support/test_setup.dart';

void main() {
  setUpAll(setUpTestEnvironment);

  SessionController demoSession({bool seeded = true}) {
    return SessionController(
      config: AppConfig.demo,
      storage: InMemorySessionStorage(),
      demoBackend: seeded ? DemoBackend() : DemoBackend.empty(),
    );
  }

  /// Skeletons pulse forever, so `pumpAndSettle` would time out.
  Future<void> settle(WidgetTester tester) async {
    await tester.pump();
    await tester.pump(const Duration(milliseconds: 400));
  }

  testWidgets('restoring session shows the branded splash', (tester) async {
    final session = demoSession();

    await tester.pumpWidget(PleasePayMeApp(session: session));
    await tester.pump();

    expect(find.text('Дожить до ЗП'), findsOneWidget);
    expect(find.text('Бюджет от зарплаты до зарплаты'), findsOneWidget);
    expect(find.byType(CupertinoActivityIndicator), findsOneWidget);
  });

  testWidgets('signed-out app shows the login screen', (tester) async {
    final session = demoSession();
    await session.restore();

    await tester.pumpWidget(PleasePayMeApp(session: session));
    await settle(tester);

    expect(find.text('Дожить до ЗП'), findsOneWidget);
    expect(find.text('Войти через Яндекс'), findsOneWidget);
  });

  testWidgets('demo session opens the overview with the current envelope',
      (tester) async {
    final session = demoSession()..startDemo();

    await tester.pumpWidget(PleasePayMeApp(session: session));
    await settle(tester);

    expect(find.text('Обзор'), findsWidgets);
    expect(find.text('До аванса'), findsOneWidget);
    expect(find.text('Остаток бюджета'), findsOneWidget);

    await tester.drag(find.byType(CustomScrollView).first, const Offset(0, -500));
    await settle(tester);

    // Grouped headers are uppercased by `AppSectionHeader`, as in iOS Settings.
    expect(find.text('БЛИЖАЙШАЯ ВЫПЛАТА'), findsOneWidget);
    expect(tester.takeException(), isNull);
  });

  testWidgets('tabs switch between the main sections', (tester) async {
    final session = demoSession()..startDemo();

    await tester.pumpWidget(PleasePayMeApp(session: session));
    await settle(tester);

    for (final tab in ['Журнал', 'Бюджеты', 'Работа', 'Профиль']) {
      await tester.tap(find.text(tab).last);
      await settle(tester);
      expect(tester.takeException(), isNull, reason: 'tab $tab failed to render');
    }

    expect(find.text('Демо'), findsOneWidget);
  });

  testWidgets('profile theme switcher applies dark appearance', (tester) async {
    final session = demoSession()..startDemo();
    final theme = ThemeController(store: MemoryThemeStore());

    await tester.pumpWidget(PleasePayMeApp(session: session, theme: theme));
    await settle(tester);

    await tester.tap(find.text('Профиль').last);
    await settle(tester);

    expect(find.text('Системная'), findsOneWidget);
    expect(find.text('Светлая'), findsOneWidget);

    await tester.tap(find.text('Тёмная'));
    await settle(tester);

    expect(theme.preference, ThemePreference.dark);
    expect(theme.resolve(Brightness.light), Brightness.dark);
  });

  testWidgets('empty demo backend renders the empty states', (tester) async {
    final session = demoSession(seeded: false)..startDemo();

    await tester.pumpWidget(PleasePayMeApp(session: session));
    await settle(tester);

    expect(find.text('Бюджета пока нет'), findsOneWidget);
    expect(find.text('Создать бюджет'), findsOneWidget);
  });

  testWidgets('recording an expense updates the remaining amount', (tester) async {
    final session = demoSession()..startDemo();

    await tester.pumpWidget(PleasePayMeApp(session: session));
    await settle(tester);

    await tester.tap(find.text('Добавить трату'));
    await settle(tester);
    expect(find.text('Новая трата'), findsOneWidget);

    await tester.enterText(find.byType(CupertinoTextField).first, '1000');
    await settle(tester);

    await tester.tap(find.text('Записать трату'));
    await tester.pump();
    await tester.pump(const Duration(milliseconds: 500));

    expect(find.text('Новая трата'), findsNothing);
    expect(find.text('Трата записана'), findsOneWidget);

    // Let the toast auto-dismiss so no timers outlive the test.
    await tester.pump(const Duration(seconds: 3));
    expect(tester.takeException(), isNull);
  });
}