/// 设置页 widget 测试（P3 计划 Task 3）。
///
/// 覆盖：修改密码入口跳 /password-change；退出登录 → 调 api.logout
/// （尽力而为）→ 清空本地会话 → 清栈回 /login。
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/locale_controller.dart';
import 'package:photo_live/core/api_client.dart';
import 'package:photo_live/core/session_store.dart';
import 'package:photo_live/l10n/app_localizations.dart';
import 'package:photo_live/pages/home_page.dart';
import 'package:photo_live/pages/login_page.dart';
import 'package:photo_live/pages/password_change_page.dart';

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

void main() {
  late FakeSessionStore store;

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

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

  Future<void> pumpHome(
    WidgetTester tester,
    ApiClient client, {
    List<dynamic> extraOverrides = const <dynamic>[],
  }) async {
    await tester.pumpWidget(
      ProviderScope(
        // Task 9 起主壳含队列页（触达 sessionAccountProvider/TaskStore），
        // 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),
          ...extraOverrides,
        ],
        child: MaterialApp(
          localizationsDelegates: AppLocalizations.localizationsDelegates,
          supportedLocales: AppLocalizations.supportedLocales,
          home: const HomePage(),
          routes: {
            '/login': (context) => const LoginPage(),
            '/password-change': (context) => const PasswordChangePage(),
          },
        ),
      ),
    );
    await tester.pumpAndSettle();
    // 切到设置 tab（底部导航第三项）。
    await tester.tap(find.byIcon(Icons.settings_outlined));
    await tester.pumpAndSettle();
  }

  testWidgets('修改密码入口 → 跳 /password-change', (tester) async {
    final adapter = FakeAdapter((_) => throw StateError('不应发起请求'));
    await pumpHome(tester, clientOf(adapter));

    await tester.tap(find.text('Change password'));
    await tester.pumpAndSettle();

    expect(find.byType(PasswordChangePage), findsOneWidget);
  });

  testWidgets('退出登录 → api.logout + 清会话 + 清栈回 /login（服务端失败亦然）',
      (tester) async {
    // 服务端撤销失败（500）也照样本地登出——尽力而为语义。
    // 首页「相册」页签（Task 4）进入即自动拉列表，需一并兜底路由。
    final adapter = FakeAdapter((o) {
      if (o.path == '/v1/auth/logout') return (500, errorBody('INTERNAL_ERROR'));
      if (o.path == '/v1/albums') return (500, errorBody('INTERNAL_ERROR'));
      throw StateError('unexpected ${o.path}');
    });
    await pumpHome(tester, clientOf(adapter));

    await tester.tap(find.text('Sign out'));
    await tester.pumpAndSettle();

    final logout = adapter.requests.singleWhere(
      (r) => r.path == '/v1/auth/logout',
    );
    expect(logout.method, 'POST');
    expect(store.session, isNull, reason: '本地会话必须清除');
    expect(find.byType(LoginPage), findsOneWidget);
    expect(find.byType(HomePage), findsNothing, reason: '主壳已出栈');
  });

  testWidgets('语言切换：底部弹层三选一 → 更新档位 + 持久化（P3 Task 10）',
      (tester) async {
    final adapter = FakeAdapter((_) => throw StateError('不应发起请求'));
    final localeStore = FakeLocaleStore();
    await pumpHome(
      tester,
      clientOf(adapter),
      extraOverrides: [
        localeSettingsProvider.overrideWith(
          () => LocaleSettings(store: localeStore),
        ),
      ],
    );

    // 本 harness 的 MaterialApp 固定 en（live 全 App 重建在
    // app/locale_test.dart 的 PhotoLiveApp 用例覆盖）。
    expect(find.text('Language'), findsOneWidget);
    expect(find.text('Follow system'), findsOneWidget, reason: '默认档位副标题');

    await tester.tap(find.text('Language'));
    await tester.pumpAndSettle();

    // 弹层三选项（语言名以自身语言书写，跨 locale 不变）。
    // 「Follow system」出现两次：主档 tile 副标题 + 弹层选项。
    expect(find.text('Follow system'), findsNWidgets(2));
    expect(find.text('中文'), findsOneWidget);
    expect(find.text('English'), findsOneWidget);

    await tester.tap(find.text('中文'));
    await tester.pumpAndSettle();

    expect(find.text('中文'), findsOneWidget, reason: '副标题更新为当前档位');
    expect(localeStore.writes, ['zh'], reason: '选择写入 app.locale');
  });
}