/*
 * Copyright 2012-2016 the original author or authors.
 *
 * 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 sample.test.service;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import sample.test.domain.VehicleIdentificationNumber;

import org.springframework.http.HttpStatus;
import org.springframework.stereotype.Service;
import org.springframework.util.Assert;
import org.springframework.web.client.HttpStatusCodeException;
import org.springframework.web.client.RestTemplate;

/**
 * {@link VehicleDetailsService} backed by a remote REST service.
 *
 * @author Phillip Webb
 */
@Service
public class RemoteVehicleDetailsService implements VehicleDetailsService {

	private static final Logger logger = LoggerFactory
			.getLogger(RemoteVehicleDetailsService.class);

	private final ServiceProperties properties;

	private final RestTemplate restTemplate;

	public RemoteVehicleDetailsService(ServiceProperties properties) {
		this.properties = properties;
		this.restTemplate = new RestTemplate();
	}

	protected final RestTemplate getRestTemplate() {
		return this.restTemplate;
	}

	@Override
	public VehicleDetails getVehicleDetails(VehicleIdentificationNumber vin)
			throws VehicleIdentificationNumberNotFoundException {
		Assert.notNull(vin, "VIN must not be null");
		String url = this.properties.getVehicleServiceRootUrl() + "vehicle/{vin}/details";
		logger.debug("Retrieving vehicle data for: " + vin + " from: " + url);
		try {
			return this.restTemplate.getForObject(url, VehicleDetails.class, vin);
		}
		catch (HttpStatusCodeException ex) {
			if (HttpStatus.NOT_FOUND.equals(ex.getStatusCode())) {
				throw new VehicleIdentificationNumberNotFoundException(vin, ex);
			}
			throw ex;
		}
	}

}
