/*******************************************************************************
 * 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.auth.builder;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import at.gv.egovernment.moa.id.auth.AuthenticationServer;
import at.gv.egovernment.moa.id.auth.data.AuthenticationSession;
import at.gv.egovernment.moa.id.auth.exception.AuthenticationException;
import at.gv.egovernment.moa.id.auth.exception.MOAIDException;
import at.gv.egovernment.moa.id.auth.exception.WrongParametersException;
import at.gv.egovernment.moa.id.config.auth.AuthConfigurationProvider;
import at.gv.egovernment.moa.id.config.stork.STORKConfig;
import at.gv.egovernment.moa.logging.Logger;
import at.gv.egovernment.moa.util.StringUtils;

public class StartAuthenticationBuilder {

	private static StartAuthenticationBuilder instance = null;
	
	public static StartAuthenticationBuilder getInstance() {
		if (instance == null) {
			instance = new StartAuthenticationBuilder();
		}
		return instance;
	}
	
	
	/**
	 * Depending on the selected citizen's country ({@code moasession.ccc}):
	 * <ul>
	 * <li><strong>Either</strong> creates an "IdentityLinkForm" with embedded {@code InfoBoxReadRequest} to be submitted to a citizen card
	 * environment for reading the subject's IdentityLink</li>
	 * </ul>
	 * 
	 * @return The IdentityLinkForm.
	 */
	public String build(AuthenticationSession moasession, HttpServletRequest req,
			HttpServletResponse resp) throws WrongParametersException, MOAIDException {
		
		if (moasession == null) {
			throw new AuthenticationException("auth.18", new Object[] { });
		}
		  
    	//normal MOA-ID authentication
    	Logger.debug("Starting normal MOA-ID authentication");
	    			    	    	
    	String getIdentityLinkForm = AuthenticationServer.getInstance().startAuthentication(moasession, req);	   

    	return getIdentityLinkForm;
	}
}