/// 照片管理占位页 widget 测试（P3 计划 Task 4）。
///
/// 覆盖：Task 9 占位横幅、基础列表（可见性/处理状态标签、时区时间）、
/// 游标加载更多。完整交互由 Task 9 替换。
library;

import 'package:dio/dio.dart';
import 'package:flutter/material.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:photo_live/core/api_client.dart';
import 'package:photo_live/features/albums/models.dart';
import 'package:photo_live/l10n/app_localizations.dart';
import 'package:photo_live/pages/album_photos_page.dart';

import '../helpers/fakes.dart';

void main() {
  late FakeSessionStore store;

  setUp(() {
    store = FakeSessionStore();
  });

  ApiClient clientOf(FakeAdapter adapter) => ApiClient(
        sessionStore: store,
        dio: Dio(BaseOptions(baseUrl: 'http://test.local'))
          ..httpClientAdapter = adapter,
      );

  Future<void> pumpPhotos(WidgetTester tester, ApiClient client) async {
    await tester.pumpWidget(
      ProviderScope(
        overrides: [apiClientProvider.overrideWith((ref) => client)],
        child: MaterialApp(
          localizationsDelegates: AppLocalizations.localizationsDelegates,
          supportedLocales: AppLocalizations.supportedLocales,
          home: AlbumPhotosPage(album: Album.fromJson(albumJson())),
        ),
      ),
    );
    await tester.pumpAndSettle();
  }

  testWidgets('占位横幅 + 列表标签 + 游标加载第二页', (tester) async {
    final page1 = List<Map<String, dynamic>>.generate(
      20,
      (i) => adminPhotoJson(
        photoId: 'ph-${(i + 1).toString().padLeft(8, '0')}',
        visibility: i % 2 == 0 ? 'published' : 'unpublished',
        processingState: i % 2 == 0 ? 'ready' : 'processing',
      ),
    );
    final page2 = <Map<String, dynamic>>[
      // 区分度高的 ID：第二页条目渲染后可按标题前缀断言。
      adminPhotoJson(photoId: 'page2item'),
    ];
    final adapter = FakeAdapter((o) {
      if (o.path != '/v1/albums/alb-1/photos') {
        throw StateError('unexpected ${o.method} ${o.path}');
      }
      final cursor = o.uri.queryParameters['cursor'];
      if (cursor == null) {
        return (200, cursorPageBody(page1, nextCursor: 'pc1'));
      }
      if (cursor == 'pc1') return (200, cursorPageBody(page2));
      throw StateError('unexpected cursor $cursor');
    });

    await pumpPhotos(tester, clientOf(adapter));

    // Task 9 占位横幅。
    expect(
      find.textContaining('the full experience ships in Task 9'),
      findsOneWidget,
    );
    // 标签与条目（ListView 懒构建，只断言在渲染的可见条目）。
    expect(find.text('Published'), findsWidgets);
    expect(find.text('Unpublished'), findsWidgets);
    expect(find.text('Ready'), findsWidgets);
    expect(find.text('Processing'), findsWidgets);
    expect(find.text('2026/9/18 15:00'), findsWidgets, reason: '相册时区展示');

    // 滚动加载第二页。
    await tester.drag(find.byType(ListView), const Offset(0, -4000));
    await tester.pumpAndSettle();
    expect(
      adapter.requests.last.uri.queryParameters['cursor'],
      'pc1',
    );
    // 第二页条目渲染（标题展示 photoId 前 8 位）。
    expect(find.textContaining('page2ite'), findsOneWidget);
  });
}