/*
 * ============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============================================
 *
 * 
 */
package org.onap.portalsdk.core.logging.format;

import java.text.MessageFormat;
import java.util.Map;

import org.onap.portalsdk.core.util.SystemProperties;

public class AuditLogFormatter {
	// Singleton
	private static AuditLogFormatter instance = new AuditLogFormatter();

	public static AuditLogFormatter getInstance() {

		return instance;
	}

	public String createMessage(String protocol, String set, String loginId, String message) {

		Object[] securityMessageArgs = prepareFormatArgs(protocol, set, loginId, message);

		return MessageFormat.format(SystemProperties.SECURITY_LOG_TEMPLATE, securityMessageArgs);
	}

	/**
	 * A method for normalizing the security log field - returns the @Param
	 * defaultValue in case the entry is null or empty. If the @param entry is not
	 * empty, a single quotation is added to it.
	 * 
	 * @param entry
	 *            the entry
	 * @param defaultValue
	 *            The default value in case the entry is empty
	 * @return String (formatted)
	 */
	private String formatEntry(Object entry, String defaultValue) {
		return (entry != null && !entry.toString().isEmpty()) ? addSingleQuotes(entry.toString()) : defaultValue;

	}

	private String addSingleQuotes(String s) {
		if (null != s && !s.isEmpty()) {
			s = SystemProperties.SINGLE_QUOTE + s + SystemProperties.SINGLE_QUOTE;
		}
		return s;
	}

	/**
	 * This method prepares an Object array of arguments that would be passed to the
	 * MessageFormat.format() method, to format the security log.
	 * 
	 * @param protocol
	 * @param set
	 * @param loginId
	 * @param accessingClient
	 * @param isSuccess
	 * @param message
	 * @return
	 */
	private Object[] prepareFormatArgs(String protocol, String set, String loginId, String message) {

		Object[] messageFormatArgs = { formatEntry(protocol, SystemProperties.NA),
				formatEntry(set, SystemProperties.NA), formatEntry(loginId, SystemProperties.UNKNOWN), message };
		return messageFormatArgs;
	}

	public String createMessage(Map<String, String> logArgsMap) {

		Object[] securityMessageArgs = prepareFormatArgs(logArgsMap.get(SystemProperties.PROTOCOL),
				logArgsMap.get(SystemProperties.SECURIRY_EVENT_TYPE), logArgsMap.get(SystemProperties.LOGIN_ID),
				logArgsMap.get(SystemProperties.ADDITIONAL_INFO));

		return MessageFormat.format(SystemProperties.SECURITY_LOG_TEMPLATE, securityMessageArgs);
	}
}