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:http_mock_adapter/http_mock_adapter.dart';
import 'package:shared_preferences/shared_preferences.dart';
import 'package:jiu_client/core/api/api_client.dart';
import 'package:jiu_client/core/auth/auth_state.dart';
import 'package:jiu_client/core/config/license_copy.dart';
import 'package:jiu_client/core/models/page_result.dart';
import 'package:jiu_client/core/theme/themes.dart';
import 'package:jiu_client/models/license.dart';
import 'package:jiu_client/models/partner.dart';
import 'package:jiu_client/providers/license_provider.dart';
import 'package:jiu_client/providers/partner_provider.dart';
import 'package:jiu_client/screens/partners/partners_screen.dart';

// 只读角色：写按钮（新建/编辑/删除）应被 WriteGuard 隐藏。
// 替换原先因 ProductsScreen 重构而 skip 的旧用例，改测稳定的 PartnersScreen。

class _FakePartnerNotifier extends PartnerListNotifier {
  final AsyncValue<PageResult<Partner>> _fixed;
  _FakePartnerNotifier(String type, this._fixed) : super(type: type);

  @override
  Future<PageResult<Partner>> build() async {
    state = _fixed;
    return state.value ??
        const PageResult(data: [], total: 0, page: 1, pageSize: 20);
  }

  @override
  void reload() {}
  @override
  void setKeyword(String keyword) {}
  @override
  void setPage(int page) {}
  @override
  Future<void> createPartner(Map<String, dynamic> data) async {}
  @override
  Future<void> updatePartner(int id, Map<String, dynamic> data) async {}
  @override
  Future<void> deletePartner(int id) async {}
}

class _FakeLicenseNotifier extends LicenseNotifier {
  @override
  Future<LicenseInfo?> build() async => const LicenseInfo(
        id: 1,
        type: 'annual',
        isActive: true,
        maxDevices: 3,
        phase: 'normal',
      );
}

const _suppliers = PageResult<Partner>(
  data: [Partner(id: 1, code: 'S001', name: '茅台供应商', type: 'supplier')],
  total: 1,
  page: 1,
  pageSize: 20,
);

Widget _buildApp({required bool readonly}) {
  return ProviderScope(
    overrides: [
      isReadonlyProvider.overrideWithValue(readonly),
      licenseProvider.overrideWith(() => _FakeLicenseNotifier()),
      supplierListProvider.overrideWith(
        () => _FakePartnerNotifier('supplier', const AsyncValue.data(_suppliers)),
      ),
      customerListProvider.overrideWith(
        () => _FakePartnerNotifier(
          'customer',
          const AsyncValue.data(
              PageResult(data: [], total: 0, page: 1, pageSize: 20)),
        ),
      ),
    ],
    child: MaterialApp(theme: buildTheme('a'), home: const Scaffold(body: PartnersScreen())),
  );
}

void main() {
  TestWidgetsFlutterBinding.ensureInitialized();

  // 仅隐藏按钮不够：只读账号若绕过 UI（或后端授权过期）直接提交写操作，
  // 必须验证 403 真的被 apiClientProvider 的 onForbidden 捕获并浮出只读提示。
  test('只读账号提交写操作：后端 403(READONLY_USER) 经 apiClientProvider 浮出只读提示',
      () async {
    SharedPreferences.setMockInitialValues({});
    final container = ProviderContainer();
    addTearDown(container.dispose);

    // 登录一个只读账号，使 apiClientProvider 携带 token 并构建真实客户端。
    await container.read(authStateProvider.notifier).login(const AuthUser(
          accessToken: 'ro-token',
          refreshToken: 'ro-refresh',
          username: 'viewer',
          realName: '只读用户',
          shopNo: 'S001',
          shopId: 1,
          role: 'readonly',
        ));

    final client = container.read(apiClientProvider);
    final adapter = DioAdapter(
      dio: client.dioForTest,
      matcher: const FullHttpRequestMatcher(),
    );
    adapter.onPost(
      '/partners',
      (server) =>
          server.reply(403, {'error': 'readonly user', 'code': 'READONLY_USER'}),
      data: {'name': '新供应商'},
    );

    // 写请求被后端拒绝。
    await expectLater(
      client.post('/partners', data: {'name': '新供应商'}),
      throwsA(isA<DioException>()),
    );

    // provider 的 onForbidden 把只读提示浮到全局消息通道（用户可见的「403 浮出」）。
    expect(container.read(apiMessageProvider), LicenseCopy.readonlyUserToast);
  });

  testWidgets('只读角色：新建/编辑/删除按钮全部隐藏', (tester) async {
    tester.view.physicalSize = const Size(1280, 800);
    tester.view.devicePixelRatio = 1.0;
    addTearDown(tester.view.resetPhysicalSize);

    await tester.pumpWidget(_buildApp(readonly: true));
    await tester.pumpAndSettle();

    // 供应商已渲染，证明列表确实加载。
    expect(find.text('茅台供应商'), findsOneWidget);
    // 写按钮被 WriteGuard 隐藏。
    expect(find.text('新建'), findsNothing);
    expect(find.byKey(const Key('btn_edit_1')), findsNothing);
    expect(find.byKey(const Key('btn_delete_1')), findsNothing);
  });

  testWidgets('普通角色（normal 授权）：写按钮可见', (tester) async {
    tester.view.physicalSize = const Size(1280, 800);
    tester.view.devicePixelRatio = 1.0;
    addTearDown(tester.view.resetPhysicalSize);

    await tester.pumpWidget(_buildApp(readonly: false));
    await tester.pumpAndSettle();

    expect(find.text('茅台供应商'), findsOneWidget);
    expect(find.text('新建'), findsWidgets);
    expect(find.byKey(const Key('btn_edit_1')), findsOneWidget);
    expect(find.byKey(const Key('btn_delete_1')), findsOneWidget);
  });
}