// routing_screen_test.dart — 分流规则子屏冒烟测试:模式段选 + 规则行 + 添加按钮均可见。
//
// 仿 test/widget/invite_page_test.dart 的 _FakeNotifier 范式:直接 extends
// RoutingProfileNotifier 覆写 build(),绕过真实账户 API。
import 'package:flutter/material.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:pangolin_vpn/l10n/strings_zh.dart';
import 'package:pangolin_vpn/models/routing_profile.dart';
import 'package:pangolin_vpn/pangolin_theme.dart';
import 'package:pangolin_vpn/state/app_providers.dart';
import 'package:pangolin_vpn/state/routing_provider.dart';
import 'package:pangolin_vpn/widgets/routing_screen.dart';

import '../helpers/harness.dart';

void main() {
  setUpAll(disableGoogleFontsFetching);

  testWidgets('routing screen shows mode seg + rules + add', (tester) async {
    final profile = RoutingProfile.fromJson({
      'mode': 'rule',
      'builtin': {'china_direct': true, 'lan_direct': true, 'private_via_tunnel': true},
      'rules': [
        {'type': 'domain_suffix', 'value': 'x.com', 'action': 'direct'},
      ],
      'final': 'proxy',
    });

    await tester.pumpWidget(ProviderScope(
      overrides: [
        appTextProvider.overrideWithValue(StringsZh()),
        routingProfileProvider.overrideWith(() => _FakeRoutingNotifier(profile)),
      ],
      child: MaterialApp(
        debugShowCheckedModeBanner: false,
        theme: PangolinTheme.light,
        home: const RoutingScreen(),
      ),
    ));
    await tester.pumpAndSettle();

    // 模式段选(全局/智能分流/全部直连)存在。
    expect(find.text(StringsZh().routingModeSmart), findsWidgets);
    // 规则行:目标值展示。
    expect(find.text('x.com'), findsOneWidget);
    // 添加规则按钮存在。
    expect(find.text(StringsZh().routingAddRule), findsOneWidget);
  });

  testWidgets('non-smart mode dims the my-rules section', (tester) async {
    final profile = RoutingProfile.fromJson({
      'mode': 'global',
      'builtin': {'china_direct': true, 'lan_direct': true, 'private_via_tunnel': true},
      'rules': [
        {'type': 'domain_suffix', 'value': 'x.com', 'action': 'direct'},
      ],
      'final': 'proxy',
    });

    await tester.pumpWidget(ProviderScope(
      overrides: [
        appTextProvider.overrideWithValue(StringsZh()),
        routingProfileProvider.overrideWith(() => _FakeRoutingNotifier(profile)),
      ],
      child: MaterialApp(
        debugShowCheckedModeBanner: false,
        theme: PangolinTheme.light,
        home: const RoutingScreen(),
      ),
    ));
    await tester.pumpAndSettle();

    final opacity = tester.widget<Opacity>(find
        .ancestor(of: find.text(StringsZh().routingMyRulesOrdered), matching: find.byType(Opacity))
        .first);
    expect(opacity.opacity, lessThan(1));
  });

  testWidgets('a rule shadowed by an earlier identical rule is flagged', (tester) async {
    final profile = RoutingProfile.fromJson({
      'mode': 'rule',
      'builtin': {'china_direct': true, 'lan_direct': true, 'private_via_tunnel': true},
      'rules': [
        {'type': 'domain_suffix', 'value': 'dup.com', 'action': 'direct'},
        {'type': 'domain_suffix', 'value': 'dup.com', 'action': 'proxy'},
      ],
      'final': 'proxy',
    });

    await tester.pumpWidget(ProviderScope(
      overrides: [
        appTextProvider.overrideWithValue(StringsZh()),
        routingProfileProvider.overrideWith(() => _FakeRoutingNotifier(profile)),
      ],
      child: MaterialApp(
        debugShowCheckedModeBanner: false,
        theme: PangolinTheme.light,
        home: const RoutingScreen(),
      ),
    ));
    await tester.pumpAndSettle();

    expect(find.text(StringsZh().routingRuleShadowed), findsOneWidget);
  });

  testWidgets('a domain rule matching a system-locked domain is flagged forced', (tester) async {
    final profile = RoutingProfile.fromJson({
      'mode': 'rule',
      'builtin': {'china_direct': true, 'lan_direct': true, 'private_via_tunnel': true},
      'rules': [
        {'type': 'domain_suffix', 'value': 'git.yanmeiai.com', 'action': 'direct'},
      ],
      'final': 'proxy',
      'system_locked_domains': ['git.yanmeiai.com'],
    });

    await tester.pumpWidget(ProviderScope(
      overrides: [
        appTextProvider.overrideWithValue(StringsZh()),
        routingProfileProvider.overrideWith(() => _FakeRoutingNotifier(profile)),
      ],
      child: MaterialApp(
        debugShowCheckedModeBanner: false,
        theme: PangolinTheme.light,
        home: const RoutingScreen(),
      ),
    ));
    await tester.pumpAndSettle();

    expect(find.text(StringsZh().routingForcedRow), findsOneWidget);
  });

  testWidgets('reset button opens confirm dialog and resets on confirm', (tester) async {
    final profile = RoutingProfile.fromJson({
      'mode': 'rule',
      'builtin': {'china_direct': true, 'lan_direct': true, 'private_via_tunnel': true},
      'rules': [
        {'type': 'domain_suffix', 'value': 'x.com', 'action': 'direct'},
      ],
      'final': 'proxy',
    });

    final notifier = _FakeRoutingNotifier(profile);
    await tester.pumpWidget(ProviderScope(
      overrides: [
        appTextProvider.overrideWithValue(StringsZh()),
        routingProfileProvider.overrideWith(() => notifier),
      ],
      child: MaterialApp(
        debugShowCheckedModeBanner: false,
        theme: PangolinTheme.light,
        home: const RoutingScreen(),
      ),
    ));
    await tester.pumpAndSettle();

    expect(find.text('x.com'), findsOneWidget);

    // 重置按钮在 FINAL 区之后,滚到可见再点(屏内不止一个 Scrollable,取外层 ListView)。
    await tester.scrollUntilVisible(
      find.text(StringsZh().routingReset),
      200,
      scrollable: find.byType(Scrollable).first,
    );
    await tester.pumpAndSettle();
    await tester.tap(find.text(StringsZh().routingReset));
    await tester.pumpAndSettle();

    // 确认弹层出现,取消不触发重置。
    expect(find.text(StringsZh().routingResetConfirmBody), findsOneWidget);
    await tester.tap(find.text(StringsZh().devCancel));
    await tester.pumpAndSettle();
    expect(notifier.resetCalled, isFalse);
    expect(find.text('x.com'), findsOneWidget);

    // 再次点击并确认 → 触发重置。
    await tester.tap(find.text(StringsZh().routingReset));
    await tester.pumpAndSettle();
    await tester.tap(find.text(StringsZh().routingResetConfirmAction));
    await tester.pumpAndSettle();

    expect(notifier.resetCalled, isTrue);
    expect(find.text('x.com'), findsNothing);
  });
}

class _FakeRoutingNotifier extends RoutingProfileNotifier {
  _FakeRoutingNotifier(this._v);
  final RoutingProfile _v;
  bool resetCalled = false;

  @override
  Future<RoutingProfile> build() async => _v;

  /// 绕过真实 _persist(需要 accountApiProvider/网络),只验证「确认后触发重置」的
  /// UI 交互链路;真正的 _persist 复用行为由 routing_provider_test.dart 覆盖。
  @override
  Future<void> resetToDefault() async {
    resetCalled = true;
    state = AsyncData(RoutingProfile.defaults().copyWith(systemLockedDomains: _v.systemLockedDomains));
  }
}