/**
 * Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.pulsar.manager.controller.exception;

import org.springframework.http.HttpHeaders;
import org.springframework.http.MediaType;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.RestControllerAdvice;
import org.springframework.web.context.request.WebRequest;
import org.springframework.web.servlet.mvc.method.annotation.ResponseEntityExceptionHandler;

import java.util.List;
import java.util.stream.Collectors;

import static org.springframework.http.HttpStatus.UNPROCESSABLE_ENTITY;

@RestControllerAdvice
public class CustomizeExceptionHandler extends ResponseEntityExceptionHandler {

    @ExceptionHandler({InvalidRequestException.class})
    public ResponseEntity<Object> handleInvalidRequest(RuntimeException e, WebRequest request) {
        InvalidRequestException ire = (InvalidRequestException) e;

        List<FieldErrorResource> errorResources = ire.getErrors().getFieldErrors().stream().map(fieldError ->
                new FieldErrorResource(
                        fieldError.getObjectName(),
                        fieldError.getField(),
                        fieldError.getCode(),
                        fieldError.getDefaultMessage())).collect(Collectors.toList());

        ErrorResource error = new ErrorResource(errorResources);

        HttpHeaders headers = new HttpHeaders();
        headers.setContentType(MediaType.APPLICATION_JSON);

        return handleExceptionInternal(e, error, headers, UNPROCESSABLE_ENTITY, request);
    }
}