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/* 
 * Licensed to the soi-toolkit project under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The soi-toolkit project licenses this file to You 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.soitoolkit.commons.mule.rest;

import java.util.HashMap;
import java.util.Map;

import org.mule.api.MuleContext;
import org.mule.api.MuleException;
import org.mule.api.MuleMessage;
import org.mule.module.client.MuleClient;

public class RestClient {
	private MuleClient muleClient;
	private String muleConnector;

	public RestClient(MuleContext muleContext, String muleConnector) {
		try {
			muleClient = new MuleClient(muleContext);
			this.muleConnector = muleConnector;
		} catch (MuleException e) {
			throw new RuntimeException(e);
		}
	}

	public RestClient(MuleContext muleContext) {
		try {
			muleClient = new MuleClient(muleContext);
			this.muleConnector = null;
		} catch (MuleException e) {
			throw new RuntimeException(e);
		}
	}

	/**
	 * Perform a HTTP POST call with json request and utf8 charset
	 * 
	 * @param url
	 * @param payload
	 * @return
	 * @throws MuleException
	 */
	public MuleMessage doHttpPostRequest_JsonContent(String url, String payload) {    	

		return doHttpSendRequest(url, "POST", payload, "application/json;charset=utf-8");
	}
	
	/**
	 * Perform a HTTP POST call with xml request and utf8 charset
	 * 
	 * @param url
	 * @param payload
	 * @return
	 * @throws MuleException
	 */
	public MuleMessage doHttpPostRequest_XmlContent(String url, String payload) {    	

		return doHttpSendRequest(url, "POST", payload, "application/xml;charset=utf-8");
	}
	
	/**
	 * Perform a HTTP GET call with json response and utf8 charset
	 * 
	 * @param url
	 * @return
	 * @throws MuleException
	 */
	public MuleMessage doHttpGetRequest_JsonContent(String url) {    	

		return doHttpReceiveRequest(url, "GET", "application/json", "utf-8");
	}

	/**
	 * Perform a HTTP GET call with xml response and utf8 charset
	 * 
	 * @param url
	 * @return
	 * @throws MuleException
	 */
	public MuleMessage doHttpGetRequest_XmlContent(String url) {    	

		return doHttpReceiveRequest(url, "GET", "application/xml", "utf-8");
	}

	/**
	 * Perform a HTTP PUT call with json request and utf8 charset
	 * 
	 * @param url
	 * @param payload
	 * @return
	 * @throws MuleException
	 */
	public MuleMessage doHttpPutRequest_JsonContent(String url, String payload) {    	

		return doHttpSendRequest(url, "PUT", payload, "application/json;charset=utf-8");
	}

	/**
	 * Perform a HTTP PUT call with xml request and utf8 charset
	 * 
	 * @param url
	 * @param payload
	 * @return
	 * @throws MuleException
	 */
	public MuleMessage doHttpPutRequest_XmlContent(String url, String payload) {    	

		return doHttpSendRequest(url, "PUT", payload, "application/xml;charset=utf-8");
	}

	/**
	 * Perform a HTTP DELETE call with json response and utf8 charset
	 * 
	 * @param url
	 * @return
	 * @throws MuleException
	 */
	public MuleMessage doHttpDeleteRequest_JsonContent(String url) {    	

		return doHttpReceiveRequest(url, "DELETE", "application/json", "utf-8");
	}

	/**
	 * Perform a HTTP DELETE call with xml response and utf8 charset
	 * 
	 * @param url
	 * @return
	 * @throws MuleException
	 */
	public MuleMessage doHttpDeleteRequest_XmlContent(String url) {    	

		return doHttpReceiveRequest(url, "DELETE", "application/xml", "utf-8");
	}
	
	/**
	 * Perform a HTTP call sending information to the server using POST or PUT
	 * 
	 * @param url
	 * @param method, e.g. "POST" or "PUT"
	 * @param payload
	 * @param contentType
	 * @return
	 * @throws MuleException
	 */
	public MuleMessage doHttpSendRequest(String url, String method, String payload, String contentType) {    	

		Map properties = new HashMap();
    	properties.put("http.method",    method);
    	properties.put("Content-Type",   contentType);

    	MuleMessage response = send(url, payload, properties);
    	
    	return response;
	}
	
	/**
	 * Perform a HTTP call receiving information from the server using GET or DELETE
	 * 
	 * @param url
	 * @param method, e.g. "GET" or "DELETE"
	 * @param acceptConentType
	 * @param acceptCharSet
	 * @return
	 * @throws MuleException
	 */
	public MuleMessage doHttpReceiveRequest(String url, String method, String acceptConentType, String acceptCharSet) {    	

		Map properties = new HashMap();
    	properties.put("http.method",    method);
    	properties.put("Accept",         acceptConentType);
    	properties.put("Accept-Charset", acceptCharSet);

    	MuleMessage response = send(url, null, properties);
    	
    	return response;
	}

	private MuleMessage send(String url, String payload, Map properties) {
		if (muleConnector != null) {
			url += "?connector=" + muleConnector;
		}
		try {
			return muleClient.send(url, payload, properties);
		} catch (MuleException e) {
			throw new RuntimeException(e);
		}
	}	
}