/// 底部导航与「上传」角标测试（UI-01 Task 3，§4.1）。
///
/// 覆盖：三页签改名（Albums/Uploads/Settings）与 IndexedStack 状态保持、
/// 角标 = 当前账号未结束任务数（countsByState 聚合，写通知防抖刷新）、
/// 他账号任务不计入（账号隔离）、任务全部结束后角标隐藏、
/// [unfinishedCountOf] 纯函数口径（含 retryableFailed）。
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/app/theme.dart';
import 'package:photo_live/core/api_client.dart';
import 'package:photo_live/core/session_store.dart';
import 'package:photo_live/features/uploads/queue_controller.dart';
import 'package:photo_live/features/uploads/task_state.dart';
import 'package:photo_live/features/uploads/task_store.dart';
import 'package:photo_live/l10n/app_localizations.dart';
import 'package:photo_live/pages/albums_tab.dart';
import 'package:photo_live/pages/home_page.dart';
import 'package:photo_live/pages/queue_tab.dart';

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

UploadTaskDraft _draft(String id, {String account = 'staff01'}) =>
    UploadTaskDraft(
      id: id,
      accountId: account,
      albumId: 'alb-1',
      clientTaskId: 'ct-$id',
      sourceFilePath: '/tmp/$id.jpg',
      filename: '$id.jpg',
      bytes: 10,
      contentType: 'image/jpeg',
    );

/// 沿合法状态机单步迁移（自迁移非法，须按序调用）。
Future<void> _transition(TaskStore store, String id, UploadTaskState to) =>
    store.updateState(id, to);

void main() {
  late FakeSessionStore session;
  late TaskStore taskStore;

  setUp(() {
    session = FakeSessionStore()
      ..session = Session(
        token: 'tok-live-1',
        expiresAt: DateTime.utc(2099, 1, 1),
        account: 'staff01',
      );
    taskStore = TaskStore.memory();
  });

  Future<void> pumpHome(WidgetTester tester) async {
    // 相册列表页签进入即拉列表；空页兜底即可。
    final adapter = FakeAdapter(
      (o) => o.path == '/v1/albums'
          ? (200, cursorPageBody(<Map<String, dynamic>>[]))
          : throw StateError('unexpected ${o.path}'),
    );
    final client = ApiClient(
      sessionStore: session,
      dio: Dio(BaseOptions(baseUrl: 'http://test.local'))
        ..httpClientAdapter = adapter,
    );
    await tester.pumpWidget(
      ProviderScope(
        overrides: [
          ...pageTestOverrides(
            session: session,
            taskStore: taskStore,
            client: client,
          ),
        ],
        child: MaterialApp(
          theme: AppTheme.light,
          localizationsDelegates: AppLocalizations.localizationsDelegates,
          supportedLocales: AppLocalizations.supportedLocales,
          home: const HomePage(),
        ),
      ),
    );
    await tester.pumpAndSettle();
  }

  /// 任务库写通知 → 200ms 防抖重查（kQueueRefreshDebounce）。
  ///
  /// 不用 pumpAndSettle：uploading 任务的行级进度条为不确定态（常驻动画）。
  Future<void> pumpCounts(WidgetTester tester) async {
    await tester.pump(kQueueRefreshDebounce * 2);
    await tester.pump(const Duration(milliseconds: 50));
  }

  testWidgets('三页签改名 + IndexedStack 保持页面状态', (tester) async {
    await pumpHome(tester);

    // IndexedStack 常驻三页签（非当前页签 offstage，find 默认跳过，故显式
    // 关闭 skipOffstage）。各两次（页签 AppBar 标题 + 导航标签）——UI-01
    // 起上传中心页标题与导航标签同名 Uploads。
    expect(find.text('Albums', skipOffstage: false), findsNWidgets(2));
    expect(find.text('Uploads', skipOffstage: false), findsNWidgets(2));
    expect(find.text('Settings', skipOffstage: false), findsNWidgets(2));
    expect(
      find.text('Queue', skipOffstage: false),
      findsNothing,
      reason: '旧页签名已移除',
    );

    expect(find.byType(IndexedStack), findsOneWidget);
    expect(find.byType(AlbumsTab, skipOffstage: false), findsOneWidget);
    expect(find.byType(QueueTab, skipOffstage: false), findsOneWidget);
    expect(find.byType(Badge), findsNothing, reason: '初始无任务无角标');
  });

  testWidgets('角标 = 当前账号未完成任务数；他账号任务不计入', (tester) async {
    await pumpHome(tester);

    // 其他账号任务：账号隔离，不显示角标。
    final other = await taskStore.create(_draft('t-o1', account: 'staff02'));
    expect(other.accountId, 'staff02');
    await pumpCounts(tester);
    expect(find.byType(Badge), findsNothing, reason: '他账号任务不计入');

    // 本账号 3 个未完成（2 queued + 1 uploading）。
    final t1 = await taskStore.create(_draft('t-1'));
    final t2 = await taskStore.create(_draft('t-2'));
    final t3 = await taskStore.create(_draft('t-3'));
    await _transition(taskStore, t1.id, UploadTaskState.queued);
    await _transition(taskStore, t2.id, UploadTaskState.queued);
    await _transition(taskStore, t3.id, UploadTaskState.queued);
    await _transition(taskStore, t3.id, UploadTaskState.uploading);
    await pumpCounts(tester);

    expect(find.byType(Badge), findsOneWidget);
    expect(find.text('3'), findsOneWidget, reason: '角标计数 3');
  });

  testWidgets('任务全部结束 → 角标隐藏', (tester) async {
    await pumpHome(tester);

    final tasks = <String>[
      for (var i = 1; i <= 2; i++) (await taskStore.create(_draft('t-$i'))).id,
    ];
    for (final id in tasks) {
      await _transition(taskStore, id, UploadTaskState.queued);
    }
    await pumpCounts(tester);
    expect(find.text('2'), findsOneWidget);

    for (final id in tasks) {
      await _transition(taskStore, id, UploadTaskState.uploading);
      await _transition(taskStore, id, UploadTaskState.uploadedConfirming);
      await _transition(taskStore, id, UploadTaskState.completed);
    }
    await pumpCounts(tester);

    expect(find.byType(Badge), findsNothing, reason: '0 隐藏角标');
  });

  test('unfinishedCountOf 口径：待传 + 等待网络 + 可重试失败', () {
    Map<UploadTaskState, int> counts(Map<UploadTaskState, int> patch) =>
        <UploadTaskState, int>{
          for (final state in UploadTaskState.values) state: patch[state] ?? 0,
        };
    // 待传口径（pendingCountOf）之外，可重试失败计入；准备失败/取消/完成不计。
    expect(
      unfinishedCountOf(
        counts({UploadTaskState.queued: 2, UploadTaskState.uploading: 1}),
      ),
      3,
    );
    expect(
      unfinishedCountOf(
        counts({
          UploadTaskState.retryableFailed: 1,
          UploadTaskState.waitingNetwork: 2,
        }),
      ),
      3,
    );
    expect(
      unfinishedCountOf(
        counts({
          UploadTaskState.completed: 5,
          UploadTaskState.cancelled: 1,
          UploadTaskState.preparationFailed: 1,
        }),
      ),
      0,
    );
  });
}