import 'package:patbond_flutter/features/community/community_models.dart';
import 'package:patbond_flutter/features/community/community_repository.dart';

/// community 域测试样本 JSON（字段与契约 v1.3.0 逐字一致）。

Map<String, dynamic> sampleAuthorJson({
  String userId = 'u-1',
  String? nickname = '毛毛的铲屎官',
  String? avatarUrl = 'https://minio.local/avatar.jpg?X-Amz-Signature=sig',
}) => {'userId': userId, 'nickname': nickname, 'avatarUrl': avatarUrl};

Map<String, dynamic> samplePostMediaItemJson({
  String assetId = 'a-1',
  int position = 0,
  bool isCover = true,
}) => {
  'assetId': assetId,
  'position': position,
  'isCover': isCover,
  'url': 'https://minio.local/p.jpg?X-Amz-Signature=sig',
  'widthPx': 1080,
  'heightPx': 810,
  'caption': '晒太阳',
};

Map<String, dynamic> samplePostJson({
  String id = 'p-1',
  String status = 'published',
  bool likedByMe = false,
  int likeCount = 6,
  bool bookmarkedByMe = false,
  int bookmarkCount = 2,
  int version = 1,
}) => {
  'id': id,
  'author': sampleAuthorJson(),
  'petId': 'pet-1',
  'category': 'general',
  'title': '今天的豆豆',
  'content': '晒了一下午太阳。',
  'status': status,
  'visibility': 'public',
  'media': [samplePostMediaItemJson()],
  'likeCount': likeCount,
  'commentCount': 3,
  'bookmarkCount': bookmarkCount,
  'likedByMe': likedByMe,
  'bookmarkedByMe': bookmarkedByMe,
  'createdAt': '2026-09-08T10:00:00.000Z',
  'updatedAt': '2026-09-08T10:05:00.000Z',
  'publishedAt': status == 'published' ? '2026-09-08T10:05:00.000Z' : null,
  'version': version,
};

Map<String, dynamic> sampleFeedCardJson({
  String id = 'p-1',
  bool likedByMe = false,
  int likeCount = 6,
  bool bookmarkedByMe = false,
  int bookmarkCount = 2,
}) => {
  'id': id,
  'author': sampleAuthorJson(),
  'category': 'general',
  'title': '今天的豆豆',
  'contentPreview': '晒了一下午太阳。',
  'coverImage': samplePostMediaItemJson(),
  'mediaCount': 1,
  'likeCount': likeCount,
  'commentCount': 3,
  'bookmarkCount': bookmarkCount,
  'likedByMe': likedByMe,
  'bookmarkedByMe': bookmarkedByMe,
  'publishedAt': '2026-09-08T10:05:00.000Z',
};

Map<String, dynamic> sampleCommentJson({
  String id = 'c-1',
  Map<String, dynamic>? author,
  Map<String, dynamic>? replyToUser,
  String content = '好可爱！',
}) => {
  'id': id,
  'postId': 'p-1',
  'author': author ?? sampleAuthorJson(),
  'replyToUser': replyToUser,
  'content': content,
  'createdAt': '2026-09-08T11:00:00.000Z',
};

Map<String, dynamic> sampleUploadCredentialsJson() => {
  'assetId': 'a-1',
  'uploadUrl':
      'https://minio.local/patbond-media/post_image/a-1?X-Amz-Signature=sig',
  'method': 'PUT',
  'requiredHeaders': {'Content-Type': 'image/jpeg'},
  'expiresAt': '2026-09-08T10:10:00.000Z',
};

Map<String, dynamic> sampleMediaAssetJson({String status = 'ready'}) => {
  'id': 'a-1',
  'kind': 'image',
  'purpose': 'post_image',
  'mimeType': 'image/jpeg',
  'byteSize': 204800,
  'widthPx': 1080,
  'heightPx': 810,
  'status': status,
  'url': status == 'ready'
      ? 'https://minio.local/p.jpg?X-Amz-Signature=sig'
      : null,
  'readyAt': status == 'ready' ? '2026-09-08T10:06:00.000Z' : null,
  'createdAt': '2026-09-08T10:00:00.000Z',
};

Map<String, Object?> cursorPageJson(
  List<Map<String, dynamic>> items, {
  String? nextCursor,
  bool hasMore = false,
}) => {'items': items, 'nextCursor': nextCursor, 'hasMore': hasMore};

FeedCard sampleFeedCard({
  String id = 'p-1',
  bool likedByMe = false,
  int likeCount = 6,
}) => FeedCard.fromJson(
  sampleFeedCardJson(id: id, likedByMe: likedByMe, likeCount: likeCount),
);

CursorPage<FeedCard> feedPage(
  List<FeedCard> items, {
  String? nextCursor,
  bool hasMore = false,
}) => CursorPage(items: items, nextCursor: nextCursor, hasMore: hasMore);

Post samplePost({
  String id = 'p-1',
  bool likedByMe = false,
  int likeCount = 6,
  bool bookmarkedByMe = false,
  int bookmarkCount = 2,
}) => Post.fromJson(
  samplePostJson(
    id: id,
    likedByMe: likedByMe,
    likeCount: likeCount,
    bookmarkedByMe: bookmarkedByMe,
    bookmarkCount: bookmarkCount,
  ),
);

PostComment sampleComment({
  String id = 'c-1',
  Map<String, dynamic>? author,
  Map<String, dynamic>? replyToUser,
  String content = '好可爱！',
}) => PostComment.fromJson(
  sampleCommentJson(
    id: id,
    author: author,
    replyToUser: replyToUser,
    content: content,
  ),
);

CursorPage<PostComment> commentPage(
  List<PostComment> items, {
  String? nextCursor,
  bool hasMore = false,
}) => CursorPage(items: items, nextCursor: nextCursor, hasMore: hasMore);

/// 草稿样本（T3-17 发布页草稿恢复用；media 可清空为纯文字草稿）。
Post sampleDraft({
  String id = 'draft-1',
  int version = 3,
  String content = '草稿正文',
  bool withMedia = true,
}) => Post.fromJson({
  ...samplePostJson(id: id, status: 'draft', version: version),
  'content': content,
  if (!withMedia) 'media': const <Map<String, dynamic>>[],
});

CursorPage<Post> postPage(List<Post> items) =>
    CursorPage(items: items, nextCursor: null, hasMore: false);

/// 假仓库：controller 测试注入行为并记录调用（Completer 控时序）。
/// 未注入 handler 的方法一律 UnimplementedError（误触发即测试失败）。
class FakeCommunityRepository implements CommunityRepository {
  /// 调用日志，如 `feed:cursor=null`、`like:p-1`、`unlike:p-1`。
  final List<String> calls = [];

  Future<CursorPage<FeedCard>> Function(int? limit, String? cursor)? onFeed;
  Future<LikeState> Function(String postId, bool target)? onLikeToggle;
  Future<BookmarkState> Function(String postId, bool target)? onBookmarkToggle;
  Future<Post> Function(String postId)? onGetPost;
  Future<CursorPage<PostComment>> Function(String postId, String? cursor)?
  onListComments;
  Future<PostComment> Function(String postId, CreateCommentRequest request)?
  onCreateComment;
  Future<void> Function(String commentId)? onDeleteComment;
  Future<FollowState> Function(String userId, bool target)? onFollowToggle;
  Future<FollowStats> Function(String userId)? onGetFollowStats;
  Future<CommunityStats> Function()? onGetMyCommunityStats;
  Future<MediaUploadCredentials> Function(CreateMediaUploadRequest request)?
  onCreateMediaUpload;
  Future<MediaAsset> Function(String assetId)? onCompleteMediaUpload;
  Future<Post> Function(CreatePostRequest request, String? idempotencyKey)?
  onCreatePost;
  Future<Post> Function(String postId, UpdatePostRequest request)? onUpdatePost;
  Future<void> Function(String postId)? onDeletePost;
  Future<CursorPage<Post>> Function(PostStatus? status)? onListMyPosts;

  /// createPost 收到的幂等键顺序（同键重放断言用）。
  final List<String?> idempotencyKeys = [];

  /// 最近一次 createMediaUpload 的请求（purpose 断言用）。
  CreateMediaUploadRequest? lastMediaUploadRequest;

  @override
  Future<CursorPage<FeedCard>> getFeed({int? limit, String? cursor}) {
    calls.add('feed:cursor=$cursor');
    return onFeed!(limit, cursor);
  }

  @override
  Future<LikeState> likePost(String postId) {
    calls.add('like:$postId');
    return onLikeToggle!(postId, true);
  }

  @override
  Future<LikeState> unlikePost(String postId) {
    calls.add('unlike:$postId');
    return onLikeToggle!(postId, false);
  }

  @override
  Future<BookmarkState> bookmarkPost(String postId) {
    calls.add('bookmark:$postId');
    return onBookmarkToggle!(postId, true);
  }

  @override
  Future<BookmarkState> unbookmarkPost(String postId) {
    calls.add('unbookmark:$postId');
    return onBookmarkToggle!(postId, false);
  }

  @override
  Future<Post> getPost(String postId) {
    calls.add('getPost:$postId');
    return onGetPost!(postId);
  }

  @override
  Future<MediaUploadCredentials> createMediaUpload(
    CreateMediaUploadRequest request,
  ) {
    calls.add('createUpload:${request.mimeType}:${request.byteSize}');
    lastMediaUploadRequest = request;
    return onCreateMediaUpload!(request);
  }

  @override
  Future<MediaAsset> completeMediaUpload(String assetId) {
    calls.add('complete:$assetId');
    return onCompleteMediaUpload!(assetId);
  }

  @override
  Future<Post> createPost(CreatePostRequest request, {String? idempotencyKey}) {
    calls.add('createPost:${request.status?.name}:${request.content}');
    idempotencyKeys.add(idempotencyKey);
    return onCreatePost!(request, idempotencyKey);
  }

  @override
  Future<Post> updatePost(String postId, UpdatePostRequest request) {
    calls.add(
      'updatePost:$postId:v${request.version}:publish=${request.publish}',
    );
    return onUpdatePost!(postId, request);
  }

  @override
  Future<void> deletePost(String postId) {
    calls.add('deletePost:$postId');
    return onDeletePost!(postId);
  }

  @override
  Future<CursorPage<Post>> listMyPosts({
    int? limit,
    String? cursor,
    PostStatus? status,
  }) {
    calls.add('listMyPosts:${status?.name}');
    return onListMyPosts == null
        ? Future.value(
            const CursorPage(items: [], nextCursor: null, hasMore: false),
          )
        : onListMyPosts!(status);
  }

  @override
  Future<CursorPage<PostComment>> listComments(
    String postId, {
    int? limit,
    String? cursor,
  }) {
    calls.add('comments:$postId:cursor=$cursor');
    return onListComments!(postId, cursor);
  }

  @override
  Future<PostComment> createComment(
    String postId,
    CreateCommentRequest request,
  ) {
    calls.add('createComment:$postId:${request.content}');
    return onCreateComment!(postId, request);
  }

  @override
  Future<void> deleteComment(String commentId) {
    calls.add('deleteComment:$commentId');
    return onDeleteComment!(commentId);
  }

  @override
  Future<FollowState> followUser(String userId) {
    calls.add('follow:$userId');
    return onFollowToggle!(userId, true);
  }

  @override
  Future<FollowState> unfollowUser(String userId) {
    calls.add('unfollow:$userId');
    return onFollowToggle!(userId, false);
  }

  @override
  Future<FollowStats> getFollowStats(String userId) {
    calls.add('followStats:$userId');
    return onGetFollowStats?.call(userId) ??
        Future.value(FollowStats.fromJson(sampleFollowStatsJson()));
  }

  @override
  Future<CommunityStats> getMyCommunityStats() {
    calls.add('communityStats');
    return onGetMyCommunityStats?.call() ??
        // 缺省零值（契约：空数据返回 0 而非 null，且永不 404）。
        Future.value(
          CommunityStats.fromJson(
            sampleCommunityStatsJson(
              receivedLikeCount: 0,
              publishedPostCount: 0,
            ),
          ),
        );
  }

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

Map<String, dynamic> sampleCommunityStatsJson({
  int receivedLikeCount = 128,
  int publishedPostCount = 12,
}) => {
  'receivedLikeCount': receivedLikeCount,
  'publishedPostCount': publishedPostCount,
};

Map<String, dynamic> sampleFollowStatsJson({
  int followerCount = 24,
  int followingCount = 7,
  bool followedByMe = false,
}) => {
  'followerCount': followerCount,
  'followingCount': followingCount,
  'followedByMe': followedByMe,
};