/// 相册详情页 widget 测试（P3 计划 Task 4）。
///
/// 覆盖：详情信息区（标题/状态/时间时区/令牌/开关标签）与动作行；
/// 分类管理三流（新增对话框载荷、名称空校验拦截、编辑 PATCH、删除确认）。
library;

import 'dart:io';

import 'package:camera/camera.dart' show XFile;
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/core/notification_permission.dart';
import 'package:photo_live/core/session_store.dart';
import 'package:photo_live/features/uploads/enqueue.dart';
import 'package:photo_live/features/uploads/preparer.dart';
import 'package:photo_live/features/uploads/providers.dart';
import 'package:photo_live/features/uploads/task_store.dart';
import 'package:photo_live/l10n/app_localizations.dart';
import 'package:photo_live/pages/album_detail_page.dart';
import 'package:photo_live/pages/capture_page.dart';

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

/// JPEG 魔数最小字节（入队准备器真实文件驱动）。
const List<int> kJpgBytes = <int>[
  0xFF, 0xD8, 0xFF, 0xE0, 0x00, 0x10, 0x4A, 0x46, 0x49, 0x46, 0x00,
];

void main() {
  late FakeSessionStore store;
  late List<Map<String, dynamic>> categories;

  setUp(() {
    store = FakeSessionStore();
    categories = <Map<String, dynamic>>[
      categoryJson(id: 'cat-1', sortOrder: 0),
    ];
  });

  /// 路由：GET 详情（反映可变分类表）/ 分类 CRUD；其余路径直接抛错。
  FakeAdapter detailAdapter({
    (int, Object?)? Function(String method, String path)? onCategoryMutation,
  }) =>
      FakeAdapter((o) {
        if (o.path == '/v1/albums/alb-1' && o.method == 'GET') {
          return (200, albumJson(categories: categories));
        }
        if (o.path == '/v1/albums/alb-1/categories' && o.method == 'POST') {
          return onCategoryMutation?.call('POST', o.path) ?? (201, categoryJson(id: 'cat-new'));
        }
        if (o.path.startsWith('/v1/categories/') && o.method == 'PATCH') {
          return onCategoryMutation?.call('PATCH', o.path) ??
              (200, categoryJson(id: 'cat-1'));
        }
        if (o.path.startsWith('/v1/categories/') && o.method == 'DELETE') {
          return onCategoryMutation?.call('DELETE', o.path) ?? (204, null);
        }
        throw StateError('unexpected ${o.method} ${o.path}');
      });

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

  Future<void> pumpDetail(WidgetTester tester, ApiClient client) async {
    await tester.pumpWidget(
      ProviderScope(
        // Task 9 起详情页有上传 FAB（触达 sessionAccountProvider），
        // 真实平台通道在测试环境挂起，必须注入替身。
        overrides: [
          ...pageTestOverrides(session: store, client: client),
        ],
        child: MaterialApp(
          localizationsDelegates: AppLocalizations.localizationsDelegates,
          supportedLocales: AppLocalizations.supportedLocales,
          home: const AlbumDetailPage(albumId: 'alb-1'),
        ),
      ),
    );
    await tester.pumpAndSettle();
  }

  testWidgets('加载详情 → 信息区 + 动作行 + 分类列表', (tester) async {
    final adapter = detailAdapter();
    await pumpDetail(tester, clientOf(adapter));

    // 信息区（标题同时出现在 AppBar 与信息卡）。
    expect(find.text('开幕晚宴'), findsNWidgets(2));
    expect(find.text('Active'), findsOneWidget);
    expect(
      find.text('2026/9/18 14:30 ~ Not set (Asia/Shanghai)'),
      findsOneWidget,
    );
    expect(find.text('sharetoken000000000001'), findsOneWidget);
    expect(find.text('大宴会厅'), findsOneWidget);
    // 「Upload」出现两次：开关标签 chip + Task 9 上传 FAB 文案。
    expect(find.text('Upload'), findsNWidgets(2));
    expect(find.text('Original'), findsOneWidget);
    // 动作行（5 项）。
    expect(find.text('Edit'), findsOneWidget);
    expect(find.text('Members'), findsOneWidget);
    // 「Categories」同时出现在动作按钮与分区标题。
    expect(find.text('Categories'), findsNWidgets(2));
    expect(find.text('Share QR code'), findsOneWidget);
    expect(find.text('Photos'), findsOneWidget);
    // 分类条目（zh · en 名称连接）。
    expect(find.text('仪式 · Ceremony'), findsOneWidget);
  });

  testWidgets('新增分类：填名称与排序 → POST 载荷 → 列表刷新', (tester) async {
    var posted = false;
    final adapter = detailAdapter(
      onCategoryMutation: (method, path) {
        if (method == 'POST') {
          posted = true;
          categories = <Map<String, dynamic>>[
            ...categories,
            categoryJson(
              id: 'cat-new',
              sortOrder: 5,
              translations: <Map<String, dynamic>>[
                <String, dynamic>{'locale': 'zh-CN', 'name': '签到'},
                <String, dynamic>{'locale': 'en', 'name': 'Check-in'},
              ],
            ),
          ];
          return (201, categoryJson(id: 'cat-new', sortOrder: 5));
        }
        return null;
      },
    );
    await pumpDetail(tester, clientOf(adapter));

    await tester.tap(find.byIcon(Icons.add_circle_outline));
    await tester.pumpAndSettle();

    await tester.enterText(
      find.widgetWithText(TextFormField, 'Chinese name'),
      '签到',
    );
    await tester.enterText(
      find.widgetWithText(TextFormField, 'English name'),
      'Check-in',
    );
    await tester.enterText(
      find.widgetWithText(TextFormField, 'Sort order'),
      '5',
    );
    await tester.tap(find.text('Save'));
    await tester.pumpAndSettle();

    expect(posted, isTrue);
    // 成功后详情重载会追加 GET，故按方法+路径取 POST。
    final request = adapter.requests.singleWhere(
      (r) => r.method == 'POST' && r.path == '/v1/albums/alb-1/categories',
    );
    expect(request.path, '/v1/albums/alb-1/categories');
    expect(request.body, <String, dynamic>{
      'sortOrder': 5,
      'translations': <Map<String, dynamic>>[
        <String, dynamic>{'locale': 'zh-CN', 'name': '签到'},
        <String, dynamic>{'locale': 'en', 'name': 'Check-in'},
      ],
    });
    // 详情重载后列表含新分类。
    expect(find.text('签到 · Check-in'), findsOneWidget);
  });

  testWidgets('新增分类：名称全空 → 客户端拦截，不发请求', (tester) async {
    final adapter = detailAdapter();
    await pumpDetail(tester, clientOf(adapter));

    final requestsBefore = adapter.requests.length;
    await tester.tap(find.byIcon(Icons.add_circle_outline));
    await tester.pumpAndSettle();

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

    expect(
      find.text('At least one language name is required'),
      findsOneWidget,
    );
    expect(adapter.requests, hasLength(requestsBefore));
  });

  testWidgets('编辑分类：预填并改名 → PATCH 全量 translations + sortOrder',
      (tester) async {
    var patched = false;
    final adapter = detailAdapter(
      onCategoryMutation: (method, path) {
        if (method == 'PATCH') {
          patched = true;
          categories = <Map<String, dynamic>>[
            categoryJson(
              id: 'cat-1',
              sortOrder: 2,
              translations: <Map<String, dynamic>>[
                <String, dynamic>{'locale': 'zh-CN', 'name': '签到墙'},
                <String, dynamic>{'locale': 'en', 'name': 'Ceremony'},
              ],
            ),
          ];
          return (200, categoryJson(id: 'cat-1'));
        }
        return null;
      },
    );
    await pumpDetail(tester, clientOf(adapter));

    await tester.tap(find.text('仪式 · Ceremony'));
    await tester.pumpAndSettle();

    // 预填检查。
    final zhField = tester.widget<TextFormField>(
      find.widgetWithText(TextFormField, 'Chinese name'),
    );
    expect(zhField.controller!.text, '仪式');

    await tester.enterText(
      find.widgetWithText(TextFormField, 'Chinese name'),
      '签到墙',
    );
    await tester.enterText(
      find.widgetWithText(TextFormField, 'Sort order'),
      '2',
    );
    await tester.tap(find.text('Save'));
    await tester.pumpAndSettle();

    expect(patched, isTrue);
    // 成功后详情重载会追加 GET，故按方法+路径取 PATCH。
    final request = adapter.requests.singleWhere(
      (r) => r.method == 'PATCH' && r.path == '/v1/categories/cat-1',
    );
    expect(request.body, <String, dynamic>{
      'sortOrder': 2,
      'translations': <Map<String, dynamic>>[
        <String, dynamic>{'locale': 'zh-CN', 'name': '签到墙'},
        <String, dynamic>{'locale': 'en', 'name': 'Ceremony'},
      ],
    });
    expect(find.text('签到墙 · Ceremony'), findsOneWidget);
  });

  testWidgets('删除分类：确认对话框 → DELETE → 列表移除', (tester) async {
    final adapter = detailAdapter(
      onCategoryMutation: (method, path) {
        if (method == 'DELETE') {
          categories = <Map<String, dynamic>>[];
          return (204, null);
        }
        return null;
      },
    );
    await pumpDetail(tester, clientOf(adapter));

    await tester.tap(find.byIcon(Icons.delete_outline));
    await tester.pumpAndSettle();

    expect(
      find.text('Delete this category? Its photos will become uncategorized.'),
      findsOneWidget,
    );
    // 取消可用：先取消再重删，验证确认门。
    await tester.tap(find.text('Cancel'));
    await tester.pumpAndSettle();
    expect(find.text('仪式 · Ceremony'), findsOneWidget);

    await tester.tap(find.byIcon(Icons.delete_outline));
    await tester.pumpAndSettle();
    await tester.tap(find.widgetWithText(FilledButton, 'Delete'));
    await tester.pumpAndSettle();

    expect(
      adapter.requests.any(
        (r) => r.method == 'DELETE' && r.path == '/v1/categories/cat-1',
      ),
      isTrue,
    );
    expect(find.text('仪式 · Ceremony'), findsNothing);
    expect(find.text('No categories yet. Tap + to add one'), findsOneWidget);
  });

  group('上传入口 FAB（Task 9）', () {
    late Directory tmp;
    late List<String> galleryPaths;
    late TaskStore taskStore;

    setUp(() async {
      store.session = Session(
        token: 'tok-1',
        expiresAt: DateTime.utc(2099, 1, 1),
        account: 'alice',
      );
      tmp = await Directory.systemTemp.createTemp('detail-upload-');
      galleryPaths = <String>[];
      taskStore = TaskStore.memory();
    });

    tearDown(() async {
      await taskStore.close();
      await tmp.delete(recursive: true);
    });

    /// 详情页 + 上传链路替身（内存任务库/临时目录准备器/多选替身/
    /// 非平台相机源）。
    Future<void> pumpDetailForUpload(WidgetTester tester) async {
      final adapter = detailAdapter();
      await tester.pumpWidget(
        ProviderScope(
          overrides: [
            ...pageTestOverrides(
              session: store,
              taskStore: taskStore,
              client: clientOf(adapter),
            ),
            multiImagePickerProvider
                .overrideWith((ref) => () async => galleryPaths),
            uploadPreparerProvider.overrideWith(
              (ref) => UploadPreparer(
                taskStore,
                baseDirProvider: () async => tmp,
              ),
            ),
            notificationPermissionProvider.overrideWith(
              (ref) => NotificationPermission(isAndroid: false),
            ),
            captureSourceFactoryProvider
                .overrideWith((ref) => () async => _StaticCaptureSource()),
          ],
          child: MaterialApp(
            localizationsDelegates: AppLocalizations.localizationsDelegates,
            supportedLocales: AppLocalizations.supportedLocales,
            home: const AlbumDetailPage(albumId: 'alb-1'),
          ),
        ),
      );
      await tester.pumpAndSettle();
    }

    testWidgets('FAB → 底部弹层双入口（拍照上传 / 从相册选择）', (tester) async {
      await pumpDetailForUpload(tester);

      await tester.tap(find.byType(FloatingActionButton));
      await tester.pumpAndSettle();

      expect(find.text('Capture and upload'), findsOneWidget);
      expect(find.text('Pick from gallery'), findsOneWidget);
    });

    testWidgets('拍照上传 → 进入连拍页（目标相册带出）', (tester) async {
      await pumpDetailForUpload(tester);

      await tester.tap(find.byType(FloatingActionButton));
      await tester.pumpAndSettle();
      await tester.tap(find.text('Capture and upload'));
      await tester.pumpAndSettle();

      expect(find.byType(CapturePage), findsOneWidget);
      // 连拍页常驻信息层显示目标相册名（与详情标题同源：默认 zh 主标题）。
      expect(
        find.descendant(
          of: find.byType(CapturePage),
          matching: find.text('开幕晚宴'),
        ),
        findsOneWidget,
      );
    });

    testWidgets('从相册选择 → 多选入队 + 入队数提示', (tester) async {
      final pick1 = File('${tmp.path}/pick1.jpg')..writeAsBytesSync(kJpgBytes);
      final pick2 = File('${tmp.path}/pick2.jpg')..writeAsBytesSync(kJpgBytes);
      galleryPaths.addAll([pick1.path, pick2.path]);
      await pumpDetailForUpload(tester);

      await tester.tap(find.byType(FloatingActionButton));
      await tester.pumpAndSettle();
      // 入队链路含真实文件 IO：真实事件循环内触发行内动作。
      final tile = find.widgetWithText(ListTile, 'Pick from gallery');
      await tester.runAsync(() async {
        (tile.evaluate().single.widget as ListTile).onTap!();
        await Future<void>.delayed(const Duration(milliseconds: 300));
      });
      await tester.pumpAndSettle();

      expect(
        find.text('Added 2 photo(s) to the upload queue'),
        findsOneWidget,
      );
      final tasks = await taskStore.listByAccount('alice');
      expect(tasks, hasLength(2));
      expect(tasks.every((t) => t.albumId == 'alb-1'), isTrue);
    });
  });
}

/// 相机源替身（详情页跳连拍页测试：仅就绪，不拍摄）。
class _StaticCaptureSource implements CaptureSource {
  @override
  Future<void> initialize() async {}

  @override
  Future<XFile> capture() => throw UnimplementedError();

  @override
  Widget buildPreview() => const SizedBox();

  @override
  Future<void> dispose() async {}
}