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

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';
import 'package:patbond_flutter/features/community/media_compression.dart';
import 'package:patbond_flutter/features/community/media_picking.dart';
import 'package:patbond_flutter/features/community/media_uploader.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);
}

/// 1x1 真 PNG（70B）：桌面实测的「选中的照片」。
final Uint8List _pngBytes = base64Decode(
  'iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mP8z8DwHwAF'
  'AAH/q842iQAAAABJRU5ErkJggg==',
);

/// 桌面选图替身：Linux 桌面无 image_picker 平台实现，实测注入字节。
class _DesktopPicker implements MediaImagePicker {
  @override
  Future<List<PickedMediaImage>> pickImages({required int limit}) async => [
    PickedMediaImage(bytes: _pngBytes, name: 'live.png'),
  ];
}

/// 桌面压缩替身：Linux 桌面无 flutter_image_compress 原生实现，原样透传
/// （mime 落 image/png，在服务端白名单内）。其余环节全为生产实现。
class _PassthroughCompressor implements MediaImageCompressor {
  @override
  Future<CompressedMediaImage> compress(
    PickedMediaImage source, {
    required int quality,
  }) async => CompressedMediaImage(bytes: source.bytes, mimeType: 'image/png');
}

/// T3-17 发布链路桌面真链路实测（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：docker compose up -d --build），再：
/// PATBOND_PUBLISH_LIVE=1 flutter test integration_test/publish_live_test.dart -d linux
/// ```
///
/// 驱动**真实 App**（Linux 桌面渲染 + 真实 HTTP + MinIO 预签名直传）：
/// 注册两个一次性账号 → A 登录 → 创作 Tab「发布动态」→ 输入正文 → 选图
/// 上传（真 createUpload / 真预签名 PUT / 真 confirm）→ 发布（建草稿 →
/// PATCH 迁移）→ 回首页 Feed 新帖置顶可见 → **另起一个全新 App 实例
/// （新会话/新控制器/新 HTTP 客户端）以 B 账号登录，B 的 Feed 同样看到
/// 该帖**（M3 验收「发布后可在另一客户端看到」取证）。
///
/// 桌面替身仅两处：选图与压缩（Linux 无这两个插件的平台实现）。
/// 注意：桌面 `platform` 值为 `linux`，不在契约枚举内 → 埋点批次被服务端
/// 400 整批拒绝（既有预期行为，见 analytics_service.dart 注释）；埋点落库
/// 取证走 curl（26 号报告 §5c）。
void main() {
  final binding = IntegrationTestWidgetsFlutterBinding.ensureInitialized();
  binding.framePolicy = LiveTestWidgetsFlutterBindingFramePolicy.fullyLive;

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

  Future<void> pumpUntil(
    WidgetTester tester,
    Finder finder, {
    Duration timeout = const Duration(seconds: 30),
  }) 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');
  }

  Future<void> register(String username, String password, int seed) async {
    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：$username');
    client.close();
  }

  Future<void> login(
    WidgetTester tester,
    String username,
    String password,
  ) async {
    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'));
  }

  testWidgets('发布桌面真链路：选图上传 → 发布 → Feed 置顶 → 第二账号可见', (tester) async {
    final seed = DateTime.now().millisecondsSinceEpoch;
    final authorName = 'publive$seed';
    final readerName = 'pubread$seed';
    const password = 'Live1234!publish';
    final marker = '真链路发布 $seed';

    await register(authorName, password, seed);
    await register(readerName, password, seed + 1);

    await tester.pumpWidget(
      App(
        sessionManager: SessionManager(store: _InMemoryTokenStore()),
        mediaUploaderFactory: (repository, analytics) => MediaUploader(
          repository: repository,
          picker: _DesktopPicker(),
          compressor: _PassthroughCompressor(),
          analytics: analytics,
        ),
      ),
    );

    // ---- A 登录并发布（正文 + 一张真上传的图）----
    await login(tester, authorName, password);
    await pumpUntil(tester, find.text('创作'));
    await tester.tap(find.text('创作'));
    await pumpUntil(tester, find.text('发布动态'));
    await tester.tap(find.text('发布动态'));
    await pumpUntil(tester, find.widgetWithText(TextButton, '存草稿'));

    await tester.enterText(find.byType(TextField).first, marker);
    await tester.pump(const Duration(milliseconds: 300));
    await tester.tap(find.byIcon(Icons.add_photo_alternate_outlined));
    // 上传全程（createUpload → 预签名 PUT → confirm）走真实链路。
    await pumpUntil(tester, find.byType(Image));
    final publish = find.widgetWithText(FilledButton, '发布');
    for (var i = 0; i < 120; i++) {
      await tester.pump(const Duration(milliseconds: 250));
      if (tester.widget<FilledButton>(publish).onPressed != null) break;
    }
    expect(
      tester.widget<FilledButton>(publish).onPressed,
      isNotNull,
      reason: '图片未在 30s 内 ready，发布钮仍禁用',
    );
    await tester.tap(publish);

    // ---- 回首页 Feed：新帖置顶可见 ----
    await pumpUntil(tester, find.byType(PostCard));
    await pumpUntil(tester, find.textContaining(marker));
    final cards = tester.widgetList<PostCard>(find.byType(PostCard)).toList();
    expect(cards.first.card.contentPreview, contains(marker));
    expect(cards.first.card.mediaCount, 1);

    // ---- 第二客户端（全新 App 实例 + 全新会话）：B 登录后同样看到该帖 ----
    // 换 key 强制重建整棵树：新的 SessionManager / Controller / HTTP 客户端，
    // 等价于另一台客户端首次登录（不是同一实例内的账号切换）。
    await tester.pumpWidget(
      App(
        key: const ValueKey('client-b'),
        sessionManager: SessionManager(store: _InMemoryTokenStore()),
      ),
    );
    await login(tester, readerName, password);
    await pumpUntil(tester, find.byType(PostCard));
    await pumpUntil(tester, find.textContaining(marker));
    final readerCards = tester
        .widgetList<PostCard>(find.byType(PostCard))
        .toList();
    expect(readerCards.first.card.contentPreview, contains(marker));
  }, skip: !enabled);
}