/*******************************************************************************
 * 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.protocols.builder.attributes;

import java.io.IOException;

import javax.xml.transform.TransformerException;

import org.springframework.util.Base64Utils;

import at.gv.egiz.eaaf.core.api.idp.IAttributeGenerator;
import at.gv.egiz.eaaf.core.api.idp.IAuthData;
import at.gv.egiz.eaaf.core.api.idp.IPVPAttributeBuilder;
import at.gv.egiz.eaaf.core.api.idp.ISPConfiguration;
import at.gv.egiz.eaaf.core.exceptions.AttributeBuilderException;
import at.gv.egiz.eaaf.core.impl.idp.builder.attributes.PVPMETADATA;
import at.gv.egiz.eaaf.core.impl.utils.DOMUtils;
import at.gv.egovernment.moa.id.data.IMOAAuthData;
import at.gv.egovernment.moa.id.protocols.pvp2x.builder.attributes.exceptions.NoMandateDataAttributeException;
import at.gv.egovernment.moa.logging.Logger;

@PVPMETADATA
public class MandateFullMandateAttributeBuilder implements IPVPAttributeBuilder {

	public String getName() {
		return MANDATE_FULL_MANDATE_NAME;
	}

	public <ATT> ATT build(ISPConfiguration oaParam, IAuthData authData,
			IAttributeGenerator<ATT> g) throws AttributeBuilderException {
		if (authData instanceof IMOAAuthData) {					
			if (((IMOAAuthData)authData).isUseMandate()) {
				
				if (((IMOAAuthData)authData).isIseIDNewDemoMode()) {
					Logger.info(MANDATE_FULL_MANDATE_FRIENDLY_NAME + " is NOT available in Austrian eID demo-mode");
					return null;
					
				}
				
				
				//only provide full mandate if it is included. 
				//In case of federation only a short mandate could be include 
				if (((IMOAAuthData)authData).getMandate() != null) {
					String fullMandate;
					try {
						fullMandate = DOMUtils.serializeNode(((IMOAAuthData)authData)
								.getMandate());
						return g.buildStringAttribute(MANDATE_FULL_MANDATE_FRIENDLY_NAME,
								MANDATE_FULL_MANDATE_NAME, Base64Utils.encodeToString(fullMandate.getBytes()));
					} catch (TransformerException e) {
						Logger.error("Failed to generate Full Mandate", e);
					} catch (IOException e) {
						Logger.error("Failed to generate Full Mandate", e);
					}
				}
				throw new NoMandateDataAttributeException();
				
			}
			
		} else
			Logger.info(MANDATE_FULL_MANDATE_FRIENDLY_NAME + " is only available in MOA-ID context");			
			
		return null;

	}

	public <ATT> ATT buildEmpty(IAttributeGenerator<ATT> g) {
		return g.buildEmptyAttribute(MANDATE_FULL_MANDATE_FRIENDLY_NAME,
				MANDATE_FULL_MANDATE_NAME);
	}

}