import 'package:dio/dio.dart';

import '../../models/pb/errors/errors.pb.dart' as kerrors;

class KratosErrorInterceptor extends Interceptor {
  @override
  void onError(DioException err, ErrorInterceptorHandler handler) {
    final response = err.response;
    final raw = response?.data;
    if (response != null && raw is List<int> && raw.isNotEmpty) {
      try {
        final status = kerrors.Status.fromBuffer(raw);
        if (status.code != 0 || status.reason.isNotEmpty) {
          response.data = <String, dynamic>{
            'code': status.code,
            'reason': status.reason,
            'message': status.message,
            'metadata': status.metadata,
          };
        }
      } catch (_) {
        // A non-Kratos error body keeps its original representation.
      }
    }
    handler.next(err);
  }
}