/*******************************************************************************
 * ============LICENSE_START==================================================
 * * org.onap.dmaap
 * * ===========================================================================
 * * Copyright © 2017 AT&T Intellectual Property. All rights reserved.
 * * ===========================================================================
 * * 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.
 * * ============LICENSE_END====================================================
 * *
 * * ECOMP is a trademark and service mark of AT&T Intellectual Property.
 * *
 ******************************************************************************/


package com.att.research.datarouter.provisioning.utils;

import java.net.InetAddress;
import java.net.UnknownHostException;
import java.util.Arrays;

import com.att.research.datarouter.provisioning.BaseServlet;

/**
 * Utility functions used to generate the different URLs used by the Data Router.
 *
 * @author Robert Eby
 * @version $Id: URLUtilities.java,v 1.2 2014/03/12 19:45:41 eby Exp $
 */
public class URLUtilities {
	/**
	 * Generate the URL used to access a feed.
	 * @param feedid the feed id
	 * @return the URL
	 */
	public static String generateFeedURL(int feedid) {
		return "https://" + BaseServlet.prov_name + "/feed/" + feedid;
	}
	/**
	 * Generate the URL used to publish to a feed.
	 * @param feedid the feed id
	 * @return the URL
	 */
	public static String generatePublishURL(int feedid) {
		return "https://" + BaseServlet.prov_name + "/publish/" + feedid;
	}
	/**
	 * Generate the URL used to subscribe to a feed.
	 * @param feedid the feed id
	 * @return the URL
	 */
	public static String generateSubscribeURL(int feedid) {
		return "https://" + BaseServlet.prov_name + "/subscribe/" + feedid;
	}
	/**
	 * Generate the URL used to access a feed's logs.
	 * @param feedid the feed id
	 * @return the URL
	 */
	public static String generateFeedLogURL(int feedid) {
		return "https://" + BaseServlet.prov_name + "/feedlog/" + feedid;
	}
	/**
	 * Generate the URL used to access a subscription.
	 * @param subid the subscription id
	 * @return the URL
	 */
	public static String generateSubscriptionURL(int subid) {
		return "https://" + BaseServlet.prov_name + "/subs/" + subid;
	}
	/**
	 * Generate the URL used to access a subscription's logs.
	 * @param subid the subscription id
	 * @return the URL
	 */
	public static String generateSubLogURL(int subid) {
		return "https://" + BaseServlet.prov_name + "/sublog/" + subid;
	}
	/**
	 * Generate the URL used to access the provisioning data on the peer POD.
	 * @return the URL
	 */
	public static String generatePeerProvURL() {
		return "https://" + getPeerPodName() + "/internal/prov";
	}
	/**
	 * Generate the URL used to access the logfile data on the peer POD.
	 * @return the URL
	 */
	public static String generatePeerLogsURL() {
		//Fixes for Itrack ticket - DATARTR-4#Fixing if only one Prov is configured, not to give exception to fill logs.
		String peerPodUrl = getPeerPodName();
		if(peerPodUrl.equals("") || peerPodUrl.equals(null)){
			return "";
		}
				
		return "https://" + peerPodUrl + "/internal/drlogs/";
	}
	/**
	 * Return the real (non CNAME) version of the peer POD's DNS name.
	 * @return the name
	 */
	public static String getPeerPodName() {
		if (other_pod == null) {
			String this_pod = "";
			try {
				this_pod = InetAddress.getLocalHost().getHostName();
				System.out.println("this_pod: "+this_pod);
			} catch (UnknownHostException e) {
				this_pod = "";
			}
			System.out.println("ALL PODS: "+Arrays.asList(BaseServlet.getPods()));
			for (String pod : BaseServlet.getPods()) {
				if (!pod.equals(this_pod))
					other_pod = pod;
			}
		}
		return other_pod;
	}
	private static String other_pod;
}