import 'package:json_annotation/json_annotation.dart';

part 'stream.g.dart';

// Object for live Twitch streams.
@JsonSerializable(createToJson: false, fieldRename: FieldRename.snake)
class StreamTwitch {
  final String userId;
  final String userLogin;
  final String userName;
  final String gameId;
  final String gameName;
  final String title;
  final int viewerCount;
  final String startedAt;
  final String thumbnailUrl;

  /// ISO 639-1 broadcast language from Helix (`de`, `en`, …). Empty when unknown.
  @JsonKey(defaultValue: '')
  final String language;

  /// Freeform tags from Helix (e.g. `Deutsch`, `English`).
  @JsonKey(defaultValue: <String>[])
  final List<String> tags;

  const StreamTwitch(
    this.userId,
    this.userLogin,
    this.userName,
    this.gameId,
    this.gameName,
    this.title,
    this.viewerCount,
    this.startedAt,
    this.thumbnailUrl, [
    this.language = '',
    this.tags = const [],
  ]);

  factory StreamTwitch.fromJson(Map<String, dynamic> json) =>
      _$StreamTwitchFromJson(json);
}

@JsonSerializable(createToJson: false, fieldRename: FieldRename.snake)
class StreamsTwitch {
  final List<StreamTwitch> data;
  final Map<String, String> pagination;

  const StreamsTwitch(this.data, this.pagination);

  factory StreamsTwitch.fromJson(Map<String, dynamic> json) {
    final rawPagination = json['pagination'];
    final pagination = <String, String>{};
    if (rawPagination is Map) {
      final cursor = rawPagination['cursor'];
      if (cursor is String && cursor.isNotEmpty) {
        pagination['cursor'] = cursor;
      }
    }
    return StreamsTwitch(
      (json['data'] as List<dynamic>)
          .map((e) => StreamTwitch.fromJson(e as Map<String, dynamic>))
          .toList(),
      pagination,
    );
  }
}