/*
 * Copyright 2018 Confluent Inc.
 *
 * Licensed under the Confluent Community License (the "License"); you may not use
 * this file except in compliance with the License.  You may obtain a copy of the
 * License at
 *
 * http://www.confluent.io/confluent-community-license
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OF ANY KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations under the License.
 */

package io.confluent.ksql.rest.server.resources;

import io.confluent.ksql.rest.entity.KsqlErrorMessage;
import javax.ws.rs.WebApplicationException;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response;
import javax.ws.rs.ext.ExceptionMapper;

public class KsqlExceptionMapper implements ExceptionMapper<Throwable> {

  @Override
  public Response toResponse(final Throwable exception) {
    // TODO: Distinguish between exceptions that warrant a stack trace and ones that don't
    if (exception instanceof KsqlRestException) {
      final KsqlRestException restException = (KsqlRestException)exception;
      return restException.getResponse();
    }
    if (exception instanceof WebApplicationException) {
      final WebApplicationException webApplicationException = (WebApplicationException)exception;
      return Response
          .status(
              Response.Status.fromStatusCode(
                  webApplicationException.getResponse().getStatus()))
          .type(MediaType.APPLICATION_JSON_TYPE)
          .entity(
              new KsqlErrorMessage(
                  Errors.toErrorCode(webApplicationException.getResponse().getStatus()),
                  webApplicationException))
          .build();
    }
    return Response
        .status(Response.Status.INTERNAL_SERVER_ERROR)
        .type(MediaType.APPLICATION_JSON_TYPE)
        .entity(new KsqlErrorMessage(Errors.ERROR_CODE_SERVER_ERROR, exception))
        .build();
  }
}
