// 功能描述：验证用户头像的真实图片、空值占位和加载失败回退状态。
// 版本：1.0.0
import 'dart:convert';
import 'dart:typed_data';

import 'package:flutter/material.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:user_app/data/services/api_client.dart';
import 'package:user_app/ui/features/profile/profile_avatar.dart';

/// 验证头像组件在不同图片状态下保持可用。
void main() {
  /// 构建统一头像测试宿主。
  Widget testHost({
    required String name,
    required Uint8List? imageBytes,
  }) => MaterialApp(
    home: Scaffold(
      body: ProfileAvatar(
        name: name,
        imageBytes: imageBytes,
      ),
    ),
  );

  testWidgets('有头像时使用圆形裁剪图片', (tester) async {
    final imageBytes = Uint8List.fromList(
      base64Decode(
        'iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mNk+M/wHwAF/gL+X8l7WQAAAABJRU5ErkJggg==',
      ),
    );
    await tester.pumpWidget(
      testHost(
        name: 'cyyy',
        imageBytes: imageBytes,
      ),
    );
    await tester.pumpAndSettle();

    final image = tester.widget<Image>(find.byKey(const Key('profile-avatar-image')));
    expect(image.fit, BoxFit.cover);
    expect(image.image, isA<MemoryImage>());
  });

  testWidgets('头像为空时显示用户名首字母', (tester) async {
    await tester.pumpWidget(testHost(name: 'cyyy', imageBytes: null));

    expect(find.text('c'), findsOneWidget);
    expect(find.byKey(const Key('profile-avatar-image')), findsNothing);
  });

  testWidgets('头像加载失败时回退用户名首字母', (tester) async {
    await tester.pumpWidget(
      testHost(
        name: 'cyyy',
        imageBytes: Uint8List.fromList(const [0]),
      ),
    );
    await tester.pumpAndSettle();

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

  test('头像接口失败时安全返回空值', () async {
    final result = await loadProfileAvatarSafely(
      () => throw const ApiException(500, '头像加载失败'),
    );

    expect(result, isNull);
  });
}