/*
 * Copyright 2014 Federal Chancellery Austria
 * MOA-ID has been developed in a cooperation between BRZ, the Federal
 * Chancellery Austria - ICT staff unit, and Graz University of Technology.
 *
 * Licensed under the EUPL, Version 1.1 or - as soon they will be approved by
 * the European Commission - subsequent versions of the EUPL (the "Licence");
 * You may not use this work except in compliance with the Licence.
 * You may obtain a copy of the Licence at:
 * http://www.osor.eu/eupl/
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the Licence is distributed on an "AS IS" basis,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the Licence for the specific language governing permissions and
 * limitations under the Licence.
 *
 * This product combines work with different licenses. See the "NOTICE" text
 * file for details on the various modules and licenses.
 * The "NOTICE" text file is part of the distribution. Any derivative works
 * that you distribute must include a readable copy of the "NOTICE" text file.
 */
package at.gv.egovernment.moa.id.util;

import java.util.Locale;

import at.gv.egovernment.moa.id.auth.exception.BKUException;
import at.gv.egovernment.moa.id.auth.exception.MISSimpleClientException;
import at.gv.egovernment.moa.id.commons.api.exceptions.MOAIDException;
import at.gv.egovernment.moa.id.process.ProcessExecutionException;
import at.gv.egovernment.moa.util.Messages;
import at.gv.egovernment.moa.util.MiscUtil;

/**
 * @author tlenz
 *
 */
public class ErrorResponseUtils {

	public static final String INTERNALERRORCODE = "9199"; 
	
	private static ErrorResponseUtils instance = null;
	private static final String[] DEFAULT_MESSAGE_RESOURCES =
		    { "resources/properties/protocol_response_statuscodes" };  
	private static final Locale[] DEFAULT_MESSAGE_LOCALES =
		    new Locale[] { new Locale("de", "AT") };
	private Messages messages = null;
	
	
	public static ErrorResponseUtils getInstance() {
		if (instance == null) {
			instance = new ErrorResponseUtils(DEFAULT_MESSAGE_RESOURCES, DEFAULT_MESSAGE_LOCALES);
			
		}
		return instance;
	}
	
	private ErrorResponseUtils(String[] resourceNames, Locale[] locales) {
		this.messages = new Messages(resourceNames, locales);
	}
	
	public String getResponseErrorCode(Throwable throwable) {
		String errorCode = null;
		
		if (throwable instanceof BKUException) {
			BKUException error = (BKUException) throwable;			
			errorCode = mapInternalErrorToExternalError(error.getMessageId()) + 
					error.getBkuErrorCode();			
			
		} else if (throwable instanceof MISSimpleClientException) {
			MISSimpleClientException error = (MISSimpleClientException) throwable;
			
			if (MiscUtil.isNotEmpty(error.getMISErrorCode()))
				errorCode = mapInternalErrorToExternalError(error.getMessageId()) + 
						error.getMISErrorCode();							
			else
				errorCode = mapInternalErrorToExternalError(error.getMessageId());
						
		} else if (throwable instanceof MOAIDException) {
			MOAIDException error = (MOAIDException) throwable;
			errorCode = mapInternalErrorToExternalError(error.getMessageId());
		
		} else if (throwable instanceof ProcessExecutionException) {
			errorCode = "1100";
			
		} else {
			errorCode = INTERNALERRORCODE;
						
		}
				
		return errorCode;
		
	}
	
	public String mapInternalErrorToExternalError(String intErrorCode) {		
		String extErrorCode = messages.getMessage(intErrorCode, null);
		
		if (MiscUtil.isEmpty(extErrorCode))
			extErrorCode = INTERNALERRORCODE;
				
		return extErrorCode;
		
	}
	
}