// Author: fruit.com.cn

import 'package:flutter/material.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:fruitshorts/core/data/models/home_feed.dart';
import 'package:fruitshorts/l10n/app_localizations.dart';
import 'package:fruitshorts/pages/discover/widgets/feed_banner_carousel.dart';

void main() {
  testWidgets('should_render_nothing_when_banner_list_is_empty', (
    tester,
  ) async {
    await _pump(tester, const []);

    expect(find.byKey(const Key('feed-banner-carousel')), findsNothing);
  });

  testWidgets('should_open_linked_drama_when_banner_is_tapped', (tester) async {
    FeedBanner? opened;
    await _pump(tester, const [
      FeedBanner(
        id: 'banner-1',
        imageUrl: '/files/banner.jpg',
        linkType: 'DRAMA',
        linkValue: 'drama-1',
      ),
    ], onOpen: (banner) => opened = banner);

    expect(find.byKey(const Key('feed-banner-carousel')), findsOneWidget);
    expect(find.byKey(const Key('feed-banner-0')), findsOneWidget);
    await tester.tap(find.byKey(const Key('feed-banner-0')));
    await tester.pump();

    expect(opened?.dramaId, 'drama-1');
  });

  testWidgets('should_advance_to_next_banner_when_interval_elapses', (
    tester,
  ) async {
    await _pump(tester, _banners);

    await tester.pump(const Duration(milliseconds: 4600));
    await tester.pumpAndSettle();

    expect(_page(tester), 1);
  });

  testWidgets('should_pause_auto_advance_when_pointer_is_held', (tester) async {
    await _pump(tester, _banners);
    final gesture = await tester.startGesture(
      tester.getCenter(find.byKey(const Key('feed-banner-carousel'))),
    );

    await tester.pump(const Duration(seconds: 5));
    expect(_page(tester), 0);

    await gesture.up();
    await tester.pump(const Duration(seconds: 5));
    await tester.pumpAndSettle();
    expect(_page(tester), 1);
  });
}

const _banners = [
  FeedBanner(id: 'banner-1', imageUrl: '/files/one.jpg'),
  FeedBanner(id: 'banner-2', imageUrl: '/files/two.jpg'),
];

double _page(WidgetTester tester) =>
    tester.widget<PageView>(find.byType(PageView)).controller!.page!;

Future<void> _pump(
  WidgetTester tester,
  List<FeedBanner> banners, {
  ValueChanged<FeedBanner>? onOpen,
}) async {
  await tester.pumpWidget(
    MaterialApp(
      locale: const Locale('en'),
      localizationsDelegates: AppLocalizations.localizationsDelegates,
      supportedLocales: AppLocalizations.supportedLocales,
      home: Scaffold(
        body: FeedBannerCarousel(banners: banners, onOpen: onOpen ?? (_) {}),
      ),
    ),
  );
  await tester.pump();
}