/*
    * Copyright 2015 Data Archiving and Networked Services (an institute of
    * Koninklijke Nederlandse Akademie van Wetenschappen), King's College London,
    * Georg-August-Universitaet Goettingen Stiftung Oeffentlichen Rechts
    *
    * Licensed under the EUPL, Version 1.1 or – as soon they will be approved by
    * the European Commission - subsequent versions of the EUPL (the "Licence");
    * You may not use this work except in compliance with the Licence.
    * You may obtain a copy of the Licence at:
   *
   * https://joinup.ec.europa.eu/software/page/eupl
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the Licence is distributed on an "AS IS" basis,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the Licence for the specific language governing
   * permissions and limitations under the Licence.
   */
  
  package eu.ehri.extension.errors;
  
  import com.fasterxml.jackson.core.JsonProcessingException;
  import com.fasterxml.jackson.databind.ObjectMapper;
  import com.google.common.base.Charsets;
  import com.google.common.collect.ImmutableMap;
  import graphql.GraphQLError;
  import graphql.GraphqlErrorHelper;
  
  import javax.ws.rs.WebApplicationException;
  import javax.ws.rs.core.Response;
  import java.util.List;
  import java.util.stream.Collectors;
  
  public class ExecutionError extends WebApplicationException {
      private static final ObjectMapper mapper = new ObjectMapper();
  
      public ExecutionError(List<? extends GraphQLError> errors) {
          super(Response.status(Response.Status.BAD_REQUEST)
                  .entity(errorToJson(errors).getBytes(Charsets.UTF_8)).build());
      }
  
      private static String errorToJson(List<? extends GraphQLError> errors) {
          try {
              return mapper.writeValueAsString(
                      ImmutableMap.of("errors", errors
                              .stream()
                              .map(GraphqlErrorHelper::toSpecification)
                              .collect(Collectors.toList())
                      )
              );
          } catch (JsonProcessingException err) {
              throw new RuntimeException(err);
          }
      }
  }