import 'package:flutter/material.dart';
import 'package:flutter/gestures.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:frontend/core/constants/app_sizes.dart';
import 'package:frontend/core/theme/app_colors.dart';
import 'package:frontend/features/home/domain/models/link_item.dart';
import 'package:frontend/features/home/presentation/widgets/link_card.dart';

const LinkItem _item = LinkItem(
  id: 'github',
  title: 'GitHub',
  url: 'https://github.com',
  description: '代码托管与开源社区',
);

void main() {
  late int openCount;

  setUp(() {
    openCount = 0;
  });

  Future<void> pumpCard(
    WidgetTester tester, {
    LinkItem item = _item,
    Size size = const Size(280, 200),
  }) async {
    tester.view.physicalSize = size;
    tester.view.devicePixelRatio = 1;
    addTearDown(tester.view.reset);

    await tester.pumpWidget(
      MaterialApp(
        home: Scaffold(
          backgroundColor: AppColors.background,
          body: Center(
            child: SizedBox(
              width: 260,
              child: LinkCard(item: item, onOpen: () => openCount++),
            ),
          ),
        ),
      ),
    );
    await tester.pump();
  }

  testWidgets('渲染首字母图标、名称与描述', (WidgetTester tester) async {
    await pumpCard(tester);

    expect(find.text('G'), findsOneWidget);
    expect(find.text('GitHub'), findsOneWidget);
    expect(find.text('代码托管与开源社区'), findsOneWidget);
  });

  testWidgets('没有描述时不报错', (WidgetTester tester) async {
    await pumpCard(
      tester,
      item: const LinkItem(id: 'x', title: '示例', url: 'https://example.com'),
    );

    expect(find.text('示'), findsOneWidget);
    expect(find.text('示例'), findsOneWidget);
  });

  testWidgets('点击触发打开回调', (WidgetTester tester) async {
    await pumpCard(tester);

    await tester.tap(find.text('GitHub'));
    await tester.pump();

    expect(openCount, 1);
  });

  testWidgets('悬停时上浮', (WidgetTester tester) async {
    await pumpCard(tester);

    // AnimatedContainer 目标 transform 的 y 分量就是上浮距离：
    // 直接断言它，不受 Tooltip 等外层 RenderObject 的影响。
    double lift() {
      final AnimatedContainer container = tester.widget<AnimatedContainer>(
        find.descendant(
          of: find.byType(LinkCard),
          matching: find.byType(AnimatedContainer),
        ),
      );
      return container.transform?.getTranslation().y ?? 0;
    }

    expect(lift(), 0);

    final TestGesture gesture = await tester.createGesture(
      kind: PointerDeviceKind.mouse,
    );
    await gesture.addPointer(location: tester.getCenter(find.byType(LinkCard)));
    addTearDown(gesture.removePointer);
    await gesture.moveTo(tester.getCenter(find.byType(LinkCard)));
    await tester.pumpAndSettle();

    expect(lift(), -AppSizes.cardHoverLift);
  });
}