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/**
* Copyright 2017-2021 Fred Feng ([email protected])

* 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 indi.atlantis.framework.chaconne.cluster;

import java.util.List;

import org.springframework.core.ParameterizedTypeReference;
import org.springframework.http.HttpEntity;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpMethod;
import org.springframework.http.MediaType;
import org.springframework.http.ResponseEntity;
import org.springframework.http.client.ClientHttpRequestFactory;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.util.LinkedMultiValueMap;
import org.springframework.util.MultiValueMap;
import org.springframework.web.client.RestClientException;
import org.springframework.web.client.RestTemplate;

import com.github.paganini2008.devtools.ArrayUtils;
import com.github.paganini2008.devtools.multithreads.AtomicLongSequence;

import lombok.extern.slf4j.Slf4j;

/**
 * 
 * ClusterRestTemplate
 * 
 * @author Fred Feng
 *
 * @since 2.0.1
 */
@Slf4j
public abstract class ClusterRestTemplate extends RestTemplate {

	public ClusterRestTemplate(ClientHttpRequestFactory httpRequestFactory) {
		super(httpRequestFactory);
	}

	public ClusterRestTemplate(List> messageConverters) {
		super(messageConverters);
	}

	private final MultiValueMap defaultHeaders = new LinkedMultiValueMap();

	public void addHeader(String headerName, String headerValue) {
		defaultHeaders.add(headerName, headerValue);
	}

	public void setHeader(String headerName, String headerValue) {
		defaultHeaders.set(headerName, headerValue);
	}

	private final AtomicLongSequence counter = new AtomicLongSequence();
	private int hostNameSize = 1;

	public void setHostNameSize(int hostNameSize) {
		this.hostNameSize = hostNameSize;
	}

	public  ResponseEntity perform(String clusterName, String path, HttpMethod method, Object body,
			ParameterizedTypeReference responseType) {
		final String[] contextPaths = getClusterContextPaths(clusterName);
		if (ArrayUtils.isEmpty(contextPaths)) {
			throw new UnavailableJobServiceException(clusterName);
		}
		RestClientException reason = null;
		if (contextPaths.length > hostNameSize) {
			String[] copy = contextPaths.clone();
			String contextPath = null, url = null;
			while (copy.length > 0) {
				contextPath = selectContextPath(copy);
				url = contextPath + path;
				if (log.isTraceEnabled()) {
					log.trace("Perform job with url: " + url);
				}
				try {
					return super.exchange(url, method, new HttpEntity