import 'dart:convert';
import 'dart:io';

import 'package:flutter/material.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:integration_test/integration_test.dart';
import 'package:patbond_flutter/app/app.dart';
import 'package:patbond_flutter/core/widgets/post_card.dart';
import 'package:patbond_flutter/features/auth/session_manager.dart';

/// 内存 token 存储（桌面实测环境无 keyring；不落任何持久化）。
class _InMemoryTokenStore implements TokenStore {
  final Map<String, String> _values = {};

  @override
  Future<String?> read(String key) async => _values[key];

  @override
  Future<void> write(String key, String value) async => _values[key] = value;

  @override
  Future<void> delete(String key) async => _values.remove(key);
}

/// T3-14 compose 真链路桌面实测（默认跳过，不计入常规测试套件）：
///
/// ```bash
/// # 先起后端六容器（patbond-api 仓库根）并用 scratch 种子脚本发帖，再：
/// PATBOND_FEED_LIVE=1 flutter test integration_test/feed_live_test.dart -d linux
/// ```
///
/// 驱动**真实 App**（Linux 桌面渲染管线 + 真实 HTTP + MinIO 预签名图片）：
/// 注册账号 → UI 登录 → Feed 首屏真数据 → 滚动触底游标翻页到底 →
/// 下拉刷新。会话存储注入内存实现（桌面环境无 keyring，不动生产配置）。
void main() {
  final binding = IntegrationTestWidgetsFlutterBinding.ensureInitialized();
  binding.framePolicy = LiveTestWidgetsFlutterBindingFramePolicy.fullyLive;

  final enabled = Platform.environment['PATBOND_FEED_LIVE'] == '1';
  const authBase = 'http://127.0.0.1:8081';

  Future<void> pumpUntil(
    WidgetTester tester,
    Finder finder, {
    Duration timeout = const Duration(seconds: 20),
  }) async {
    final deadline = DateTime.now().add(timeout);
    while (DateTime.now().isBefore(deadline)) {
      await tester.pump(const Duration(milliseconds: 250));
      if (finder.evaluate().isNotEmpty) return;
    }
    fail('等待超时：$finder');
  }

  testWidgets('Feed 桌面真链路：登录 → 首屏 → 游标翻页到底 → 下拉刷新', (tester) async {
    // ---- 注册一次性账号（随机凭据，不落持久化）----
    final seed = DateTime.now().millisecondsSinceEpoch;
    final username = 'feedlive$seed';
    final password = 'Live1234!$seed';
    final client = HttpClient();
    final request = await client.postUrl(
      Uri.parse('$authBase/api/v1/auth/register'),
    );
    request.headers.contentType = ContentType.json;
    request.add(
      utf8.encode(
        jsonEncode({
          'username': username,
          'phone': '+86137${(seed % 100000000).toString().padLeft(8, '0')}',
          'password': password,
        }),
      ),
    );
    final response = await request.close();
    expect(response.statusCode, 200, reason: '注册测试账号失败');
    client.close();

    // ---- 启动真实 App（仅注入内存会话存储，其余全为生产实现）----
    await tester.pumpWidget(
      App(sessionManager: SessionManager(store: _InMemoryTokenStore())),
    );
    await pumpUntil(tester, find.text('登录'));

    await tester.enterText(find.byType(TextField).at(0), username);
    await tester.enterText(find.byType(TextField).at(1), password);
    await tester.tap(find.text('登录'));

    // ---- Feed 首屏：真实 getFeed + 卡片渲染 ----
    await pumpUntil(tester, find.byType(PostCard));
    expect(find.textContaining('compose 实测'), findsWidgets);

    // ---- 触底翻页到「没有更多了」（26 帖 / 服务端页长 20 → 两页取齐）----
    final list = find.byType(ListView).first;
    for (var i = 0; i < 12; i++) {
      await tester.fling(list, const Offset(0, -700), 1500);
      await tester.pump(const Duration(milliseconds: 400));
      if (find.text('没有更多了').evaluate().isNotEmpty) break;
    }
    await pumpUntil(tester, find.text('没有更多了'));
    // 最早一帖（#1）在第二页尾部——游标翻页取齐的直接证据。
    expect(find.textContaining('#1：'), findsOneWidget);

    // ---- 回顶下拉刷新：整体替换后首屏仍在 ----
    for (var i = 0; i < 12; i++) {
      await tester.fling(list, const Offset(0, 700), 1500);
      await tester.pump(const Duration(milliseconds: 200));
    }
    await tester.fling(list, const Offset(0, 400), 1000);
    await pumpUntil(tester, find.byType(PostCard));
    expect(find.textContaining('compose 实测'), findsWidgets);
  }, skip: !enabled);
}