/// 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/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) async {
    await tester.pumpWidget(
      ProviderScope(
        overrides: [apiClientProvider.overrideWith((ref) => client)],
        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。
    final adapter = FakeAdapter(
      (o) => o.path == '/v1/auth/logout'
          ? (500, errorBody('INTERNAL_ERROR'))
          : throw StateError('unexpected ${o.path}'),
    );
    await pumpHome(tester, clientOf(adapter));

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

    expect(adapter.requests.single.path, '/v1/auth/logout');
    expect(adapter.requests.single.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');
  });
}