/*
 * ============LICENSE_START==========================================
 * ONAP Portal SDK
 * ===================================================================
 * Copyright © 2017 AT&T Intellectual Property. All rights reserved.
 * ===================================================================
 *
 * Unless otherwise specified, all software contained herein is licensed
 * under the Apache License, Version 2.0 (the "License");
 * you may not use this software 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.
 *
 * Unless otherwise specified, all documentation contained herein is licensed
 * under the Creative Commons License, Attribution 4.0 Intl. (the "License");
 * you may not use this documentation except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *             https://creativecommons.org/licenses/by/4.0/
 *
 * Unless required by applicable law or agreed to in writing, documentation
 * 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 org.onap.portalsdk.core.onboarding.crossapi;

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

public class SessionCommunicationService {

	private static final Log logger = LogFactory.getLog(SessionCommunicationService.class);

	/**
	 * Calls the ECOMP Portal to retrieve the session slot check interval.
	 * 
	 * @param ecompRestURL
	 *            Remote system URL
	 * @param userName
	 *            application user name used for authentication at Portal
	 * @param password
	 *            application password used for authentication at Portal
	 * @param uebKey
	 *            application UEB key (basically application ID) used for
	 *            authentication at Portal
	 * @return Content read from the remote REST endpoint
	 */
	public static String getSessionSlotCheckInterval(String ecompRestURL, String userName, String password,
			String uebKey) {
		try {
			String url = ecompRestURL + "/getSessionSlotCheckInterval";

			URL obj = new URL(url);

			HttpURLConnection con = (HttpURLConnection) obj.openConnection();

			// optional default is GET
			con.setRequestMethod("GET");
			con.setConnectTimeout(3000);
			con.setReadTimeout(8000);
			// add request header
			con.setRequestProperty("username", userName);
			con.setRequestProperty("password", password);
			con.setRequestProperty("uebkey", uebKey);

			int responseCode = con.getResponseCode();
			if (logger.isDebugEnabled()) {
				logger.debug("getSessionSlotCheckInterval: Sending 'GET' request to URL : " + url);
				logger.debug("getSessionSlotCheckInterval: Response Code : " + responseCode);
			}

			StringBuilder response = new StringBuilder();
			try (BufferedReader in = new BufferedReader(new InputStreamReader(con.getInputStream(), "UTF-8"))) {
				String inputLine;
				while ((inputLine = in.readLine()) != null)
					response.append(inputLine);
			} catch (Exception ex) {
				logger.error("getSessionSlotCheckInterval failed to read stream", ex);
			}
			return response.toString();
		} catch (Exception e) {
			logger.error("getSessionSlotCheckInterval: failed to fetch the session slot check", e);
			return null;
		}

	}

	/**
	 * Calls the ECOMP Portal to request an extension of the current session.
	 * 
	 * @param ecompRestURL
	 *            Remote system URL
	 * @param userName
	 *            application user name used for authentication at Portal
	 * @param password
	 *            application password used for authentication at Portal
	 * @param uebKey
	 *            application UEB key (basically application ID) used for
	 *            authentication at Portal
	 * @param sessionTimeoutMap
	 *            Session timeout map
	 * @return Content read from the remote REST endpoint
	 */
	public static String requestPortalSessionTimeoutExtension(String ecompRestURL, String userName, String password,
			String uebKey, String sessionTimeoutMap) {

		try {
			String url = ecompRestURL + "/extendSessionTimeOuts";
			URL obj = new URL(url);

			HttpURLConnection con = (HttpURLConnection) obj.openConnection();

			con.setRequestMethod("POST");
			con.setConnectTimeout(3000);
			con.setReadTimeout(15000);

			// add request header
			con.setRequestProperty("username", userName);
			con.setRequestProperty("password", password);
			con.setRequestProperty("uebkey", uebKey);
			con.setRequestProperty("sessionMap", sessionTimeoutMap);
			con.setDoInput(true);
			con.setDoOutput(true);
			con.getOutputStream().write(sessionTimeoutMap.getBytes());
			con.getOutputStream().flush();
			con.getOutputStream().close();

			int responseCode = con.getResponseCode();
			if (logger.isDebugEnabled()) {
				logger.debug("requestPortalSessionTimeoutExtension: Sending 'GET' request to URL : " + url);
				logger.debug("requestPortalSessionTimeoutExtension: Response Code : " + responseCode);
			}

			StringBuilder response = new StringBuilder();
			try (BufferedReader in = new BufferedReader(new InputStreamReader(con.getInputStream()))) {
				String inputLine;
				while ((inputLine = in.readLine()) != null) {
					response.append(inputLine);
				}
			} catch (Exception ex) {
				logger.error("requestPortalSessionTimeoutExtension failed", ex);
			}
			return response.toString();
		} catch (Exception e) {
			logger.error("requestPortalSessionTimeoutExtension: failed to request Portal to extend time out ", e);
			return null;
		}

	}

}