// node_connect_confirm_test.dart — 节点列表防误触:已连接时点其他节点先弹确认。
//
// off  → 点节点直接选(跳连接页,无破坏性,不弹确认)。
// on   → 点其他节点弹确认框,取消则不切换(防误碰把当前连接切走)。
import 'package:flutter/material.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:pangolin_vpn/bridge/vpn_bridge.dart';
import 'package:pangolin_vpn/bridge/vpn_bridge_mock.dart';
import 'package:pangolin_vpn/bridge/vpn_bridge_provider.dart';
import 'package:pangolin_vpn/l10n/app_text.dart';
import 'package:pangolin_vpn/l10n/strings_zh.dart';
import 'package:pangolin_vpn/models/node.dart';
import 'package:pangolin_vpn/pangolin_theme.dart';
import 'package:pangolin_vpn/screens/nodes_page.dart';
import 'package:pangolin_vpn/state/app_providers.dart';
import 'package:pangolin_vpn/state/connection_provider.dart';
import 'package:pangolin_vpn/state/nodes_provider.dart';
import 'package:pangolin_vpn/widgets/smart_select_card.dart';

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

// 固定两节点的桩,绕过远端拉取与 10s 限流刷新。
class _StubNodes extends NodesNotifier {
  @override
  Future<List<Node>> build() async => _nodes;
  @override
  Future<void> refresh() async {}
}

const _nodes = [
  Node(code: 'HK', nameZh: '香港', nameEn: 'Hong Kong', ping: 20, uuid: 'hk-uuid', host: 'hk', port: 443),
  Node(code: 'JP', nameZh: '东京', nameEn: 'Tokyo', ping: 35, uuid: 'jp-uuid', host: 'jp', port: 443),
];

// localeProvider 现默认英文;测试硬编码 StringsZh 预期 → 钉死中文 locale。
class _FixedLocale extends LocaleNotifier {
  _FixedLocale(AppLang lang) {
    state = lang;
  }
}

void main() {
  setUpAll(disableGoogleFontsFetching);
  const t = StringsZh();

  ProviderContainer makeContainer(VpnBridge bridge) => ProviderContainer(overrides: [
        localeProvider.overrideWith((ref) => _FixedLocale(AppLang.zh)),
        nodesProvider.overrideWith(_StubNodes.new),
        vpnBridgeProvider.overrideWithValue(bridge),
      ]);

  Future<void> pump(WidgetTester tester, ProviderContainer container) async {
    await tester.binding.setSurfaceSize(const Size(440, 900));
    addTearDown(() => tester.binding.setSurfaceSize(null));
    await tester.pumpWidget(UncontrolledProviderScope(
      container: container,
      child: MaterialApp(
        debugShowCheckedModeBanner: false,
        theme: PangolinTheme.light,
        home: Scaffold(body: NodesPage(isWide: false, onPicked: () {})),
      ),
    ));
    await tester.pumpAndSettle();
  }

  testWidgets('未连接:点节点直接选,不弹确认', (tester) async {
    final container = makeContainer(VpnBridgeMock());
    addTearDown(container.dispose);
    await pump(tester, container);

    expect(find.text('香港'), findsOneWidget);
    await tester.tap(find.text('香港'));
    await tester.pumpAndSettle();

    expect(find.text(t.nodeSwitchConfirm), findsNothing, reason: 'off 态不应弹确认');
    expect(container.read(selectedNodeCodeProvider), 'HK', reason: '直接选中该节点');
  });

  testWidgets('已连接:点其他节点弹确认 → 取消不切换', (tester) async {
    final bridge = VpnBridgeMock(connectDelay: const Duration(milliseconds: 10));
    final container = makeContainer(bridge);
    addTearDown(bridge.dispose);
    addTearDown(container.dispose);
    await pump(tester, container);

    // 创建控制器(订阅状态流)后驱动到 on;此后只用 pump(固定时长),
    // 不能 pumpAndSettle(连接计时器每秒触发,永不 settle)。
    container.read(connectionProvider);
    await bridge.start('{}');
    await tester.pump(const Duration(milliseconds: 15));
    expect(container.read(connectionProvider).phase, VpnPhase.on);

    await tester.tap(find.text('东京'));
    await tester.pump();
    await tester.pump(const Duration(milliseconds: 350)); // 弹窗入场

    expect(find.text(t.nodeSwitchTitle('东京')), findsOneWidget, reason: 'on 态切换前先弹确认');
    expect(find.text(t.nodeSwitchConfirm), findsOneWidget);
    expect(container.read(selectedNodeCodeProvider), kSmartNodeCode, reason: '弹窗期间还未切');

    await tester.tap(find.text(t.devCancel));
    await tester.pump();
    await tester.pump(const Duration(milliseconds: 350)); // 弹窗退场
    expect(container.read(selectedNodeCodeProvider), kSmartNodeCode, reason: '取消后维持原节点');

    // 收尾:停桥 → 取消 stats 计时器 + 触发 off 回调取消 elapsed 计时器,
    // 否则 fake-async 在用例结束时报「Pending timers」。
    await bridge.stop();
    await tester.pump();
  });

  testWidgets('已连接:点智能选择卡也弹确认 → 取消不切换', (tester) async {
    final bridge = VpnBridgeMock(connectDelay: const Duration(milliseconds: 10));
    final container = makeContainer(bridge);
    addTearDown(bridge.dispose);
    addTearDown(container.dispose);
    // 先选具体节点(否则默认就是智能选择),便于验证取消不切到智能。
    container.read(selectedNodeCodeProvider.notifier).state = 'HK';
    await pump(tester, container);

    container.read(connectionProvider);
    await bridge.start('{}');
    await tester.pump(const Duration(milliseconds: 15));
    expect(container.read(connectionProvider).phase, VpnPhase.on);

    await tester.tap(find.byType(SmartSelectCard));
    await tester.pump();
    await tester.pump(const Duration(milliseconds: 350));

    expect(find.text(t.nodeSwitchTitle(t.smartSelect)), findsOneWidget, reason: '智能选择也应弹确认');
    expect(container.read(selectedNodeCodeProvider), 'HK', reason: '弹窗期间未切到智能');

    await tester.tap(find.text(t.devCancel));
    await tester.pump();
    await tester.pump(const Duration(milliseconds: 350));
    expect(container.read(selectedNodeCodeProvider), 'HK', reason: '取消后维持原节点');

    await bridge.stop();
    await tester.pump();
  });
}