import 'dart:async';
import 'dart:io';

import 'package:dio/dio.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:patbond_flutter/core/network/api_client.dart';
import 'package:patbond_flutter/core/network/api_exception.dart';
import 'package:patbond_flutter/core/network/token_refresher.dart';
import 'package:patbond_flutter/features/auth/auth_models.dart';
import 'package:patbond_flutter/features/auth/session_manager.dart';
import 'package:patbond_flutter/features/community/community_controller.dart';
import 'package:patbond_flutter/features/community/community_models.dart';
import 'package:patbond_flutter/features/community/community_repository.dart';
import 'package:uuid/uuid.dart';

import '../helpers/auth_test_helpers.dart';

/// T3-15/16 compose 真链路冒烟（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）：
/// #   ./deploy/init-secrets.sh
/// #   JAVA_HOME=<JDK17> ./mvnw -DskipTests package && docker compose up -d --build
/// PATBOND_DETAIL_SMOKE=1 flutter test test/smoke/detail_interactions_smoke_test.dart
/// ```
///
/// 覆盖：发帖 → 点赞（含重复施加幂等）→ 收藏/取消 → 评论创建
/// （Idempotency-Key）→ 仅作者删除评论 → 计数权威对账；再走一轮
/// **断网点赞回滚**——[CommunityController]/ToggleSync 生产实现 +
/// 生产 ApiClient 错误链，community 端点切至不可达端口模拟断网
/// （连接拒绝走真实 ApiNetworkException 路径），断言乐观翻转即刻
/// 可见、失败后快照回滚、网络恢复后权威终态收敛。
void main() {
  final enabled = Platform.environment['PATBOND_DETAIL_SMOKE'] == '1';
  final env = Platform.environment;
  final authBase = env['PATBOND_SMOKE_AUTH_BASE'] ?? 'http://127.0.0.1:8081';
  final communityBase =
      env['PATBOND_SMOKE_COMMUNITY_BASE'] ?? 'http://127.0.0.1:8084';

  test(
    '点赞/收藏/评论/删评真链路一轮 + 断网点赞回滚',
    () async {
      // ---- 注册一次性账号（随机凭据，不落任何持久化）----
      final dio = Dio(BaseOptions(validateStatus: (_) => true));
      final seed = DateTime.now().millisecondsSinceEpoch;
      final register = await dio.post<Map<String, dynamic>>(
        '$authBase/api/v1/auth/register',
        data: {
          'username': 'ismoke$seed',
          'phone': '+86138${(seed % 100000000).toString().padLeft(8, '0')}',
          'password': 'Smoke1234!$seed',
        },
        options: Options(
          headers: {
            'Idempotency-Key': const Uuid().v4(),
            'X-Device-Id': const Uuid().v4(),
          },
        ),
      );
      expect(register.data?['code'], 0, reason: '注册失败：${register.data}');

      final session = SessionManager(store: InMemoryTokenStore());
      await session.updateTokens(
        AuthTokens.fromJson(register.data!['data'] as Map<String, dynamic>),
      );
      final refresher = TokenRefresher(
        dio: buildPatbondDio(session: session, baseUrl: authBase),
        session: session,
      );
      final live = ApiCommunityRepository(
        api: ApiClient(
          dio: buildPatbondDio(session: session, baseUrl: communityBase),
          session: session,
          refresher: refresher,
        ),
      );
      // 「断网」形态：community 域切至不可达端口（连接拒绝 → 生产
      // ApiClient 映射 ApiNetworkException，与真实断网同一异常链）。
      final dead = ApiCommunityRepository(
        api: ApiClient(
          dio: buildPatbondDio(session: session, baseUrl: 'http://127.0.0.1:9'),
          session: session,
          refresher: refresher,
        ),
      );
      final switchable = _SwitchableRepository(live);

      // ---- 发帖（published，纯文字）----
      final post = await live.createPost(
        CreatePostRequest(
          content: 'T3-15/16 互动冒烟 $seed',
          status: PostStatus.published,
        ),
      );
      expect(post.likeCount, 0);
      expect(post.commentCount, 0);

      // ---- 点赞：施加 / 重复施加幂等，权威终态 ----
      var like = await live.likePost(post.id);
      expect(like.liked, true);
      expect(like.likeCount, 1);
      like = await live.likePost(post.id);
      expect(like.likeCount, 1, reason: '重复 PUT 不重复计数');

      // ---- 收藏 / 取消 ----
      var bookmark = await live.bookmarkPost(post.id);
      expect(bookmark.bookmarked, true);
      expect(bookmark.bookmarkCount, 1);
      bookmark = await live.unbookmarkPost(post.id);
      expect(bookmark.bookmarked, false);
      expect(bookmark.bookmarkCount, 0);

      // ---- 评论创建（Idempotency-Key 由仓库层携带）→ 计数 +1 ----
      final comment = await live.createComment(
        post.id,
        const CreateCommentRequest(content: '冒烟评论：真链路一轮'),
      );
      expect(comment.content, '冒烟评论：真链路一轮');
      var fresh = await live.getPost(post.id);
      expect(fresh.commentCount, 1);

      // ---- 仅作者删除评论 → 计数 -1、列表剔除 ----
      await live.deleteComment(comment.id);
      fresh = await live.getPost(post.id);
      expect(fresh.commentCount, 0);
      final comments = await live.listComments(post.id);
      expect(comments.items, isEmpty);

      // ---- 断网点赞回滚（生产 CommunityController + ToggleSync）----
      final controller = CommunityController(repository: switchable);
      await controller.refresh();
      FeedCard card() => controller.feed.firstWhere((c) => c.id == post.id);
      expect(card().likedByMe, true);
      expect(card().likeCount, 1);

      switchable.target = dead; // 拔网线。
      final errored = Completer<void>();
      controller.addListener(() {
        if (controller.toggleError != null && !errored.isCompleted) {
          errored.complete();
        }
      });
      controller.toggleLike(post.id);
      // 乐观翻转同帧可见。
      expect(card().likedByMe, false);
      expect(card().likeCount, 0);

      await errored.future.timeout(const Duration(seconds: 30));
      // 快照回滚成对恢复 + 一次性错误可供 SnackBar 消费。
      expect(card().likedByMe, true);
      expect(card().likeCount, 1);
      expect(controller.toggleError, isA<ApiNetworkException>());
      controller.clearToggleError();

      // ---- 网络恢复：取消点赞收敛到服务端权威终态 ----
      switchable.target = live;
      controller.toggleLike(post.id);
      expect(card().likedByMe, false); // 乐观翻转。
      // 轮询服务端权威终态（乐观值不作为收敛依据）。
      final deadline = DateTime.now().add(const Duration(seconds: 15));
      Post settled = await live.getPost(post.id);
      while (settled.likedByMe) {
        expect(DateTime.now().isBefore(deadline), true, reason: '收敛超时');
        await Future<void>.delayed(const Duration(milliseconds: 300));
        settled = await live.getPost(post.id);
      }
      expect(settled.likedByMe, false);
      expect(settled.likeCount, 0);
      expect(controller.toggleError, isNull);
      expect(card().likedByMe, false);
      controller.dispose();
    },
    skip: enabled ? false : '设 PATBOND_DETAIL_SMOKE=1 且后端六容器在本机运行时才执行',
    timeout: const Timeout(Duration(minutes: 3)),
  );
}

/// 可切换目标的仓库代理（断网模拟：live ↔ dead 端点整体切换）。
class _SwitchableRepository implements CommunityRepository {
  _SwitchableRepository(this.target);

  CommunityRepository target;

  @override
  Future<MediaUploadCredentials> createMediaUpload(
    CreateMediaUploadRequest request,
  ) => target.createMediaUpload(request);

  @override
  Future<MediaAsset> completeMediaUpload(String assetId) =>
      target.completeMediaUpload(assetId);

  @override
  Future<Post> createPost(
    CreatePostRequest request, {
    String? idempotencyKey,
  }) => target.createPost(request, idempotencyKey: idempotencyKey);

  @override
  Future<Post> getPost(String postId) => target.getPost(postId);

  @override
  Future<Post> updatePost(String postId, UpdatePostRequest request) =>
      target.updatePost(postId, request);

  @override
  Future<void> deletePost(String postId) => target.deletePost(postId);

  @override
  Future<CursorPage<Post>> listMyPosts({
    int? limit,
    String? cursor,
    PostStatus? status,
  }) => target.listMyPosts(limit: limit, cursor: cursor, status: status);

  @override
  Future<CursorPage<FeedCard>> getFeed({int? limit, String? cursor}) =>
      target.getFeed(limit: limit, cursor: cursor);

  @override
  Future<CursorPage<PostComment>> listComments(
    String postId, {
    int? limit,
    String? cursor,
  }) => target.listComments(postId, limit: limit, cursor: cursor);

  @override
  Future<PostComment> createComment(
    String postId,
    CreateCommentRequest request,
  ) => target.createComment(postId, request);

  @override
  Future<void> deleteComment(String commentId) =>
      target.deleteComment(commentId);

  @override
  Future<LikeState> likePost(String postId) => target.likePost(postId);

  @override
  Future<LikeState> unlikePost(String postId) => target.unlikePost(postId);

  @override
  Future<BookmarkState> bookmarkPost(String postId) =>
      target.bookmarkPost(postId);

  @override
  Future<BookmarkState> unbookmarkPost(String postId) =>
      target.unbookmarkPost(postId);

  @override
  Future<CursorPage<FeedCard>> listMyBookmarks({int? limit, String? cursor}) =>
      target.listMyBookmarks(limit: limit, cursor: cursor);

  @override
  Future<FollowState> followUser(String userId) => target.followUser(userId);

  @override
  Future<FollowState> unfollowUser(String userId) =>
      target.unfollowUser(userId);

  @override
  Future<FollowStats> getFollowStats(String userId) =>
      target.getFollowStats(userId);
}