/*******************************************************************************
 * <copyright> Copyright 2014 by E-Government Innovation Center EGIZ, Graz, Austria </copyright>
 * PDF-AS has been contracted by the E-Government Innovation Center EGIZ, a
 * joint initiative of the Federal Chancellery Austria 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.egiz.sl.util;

import java.math.BigInteger;
import java.util.Arrays;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import at.gv.egiz.pdfas.common.exceptions.PDFIOException;
import at.gv.egiz.pdfas.common.utils.PDFUtils;
import at.gv.egiz.sl.Base64OptRefContentType;
import at.gv.egiz.sl.CMSDataObjectRequiredMetaType;
import at.gv.egiz.sl.CreateCMSSignatureRequestType;
import at.gv.egiz.sl.ExcludedByteRangeType;
import at.gv.egiz.sl.InfoboxReadParamsAssocArrayType;
import at.gv.egiz.sl.InfoboxReadParamsAssocArrayType.ReadValue;
import at.gv.egiz.sl.InfoboxReadRequestType;
import at.gv.egiz.sl.MetaInfoType;
import at.gv.egiz.sl.ObjectFactory;

public abstract class BaseSLConnector implements ISLConnector {

	private static final Logger logger = LoggerFactory.getLogger(BaseSLConnector.class);
	
	public static final String SecureSignatureKeypair = "SecureSignatureKeypair";
	
	public static final String PDF_MIME_TYPE = "application/pdf";
	public static final String PDF_MIME_TYPE_DESC = "Adobe PDF-File";
	
	public static final String DETACHED = "detached";
	
	public static final String XMLREQUEST = "XMLRequest";
	
	protected ObjectFactory of = new ObjectFactory();
	
	public InfoboxReadRequestType createInfoboxReadRequest() {
		InfoboxReadRequestType request = new InfoboxReadRequestType();
		request.setInfoboxIdentifier("Certificates");
		InfoboxReadParamsAssocArrayType readData = new InfoboxReadParamsAssocArrayType();
		
		ReadValue readValue = new ReadValue();
		readValue.setKey(SecureSignatureKeypair);

		readData.setReadValue(readValue);
		request.setAssocArrayParameters(readData);
		return request;
	}
	
	public CreateCMSSignatureRequestType createCMSRequest(byte[] signatureData, int[] byteRange) throws PDFIOException {
		byte[] data = PDFUtils.blackOutSignature(signatureData, byteRange);

		int[] exclude_range = PDFUtils.buildExcludeRange(byteRange);
		logger.info("Exclude Byte Range: " + exclude_range[0] + " " + exclude_range[1]);
		
		// == MetaInfoType
		MetaInfoType metaInfoType = new MetaInfoType();
		metaInfoType.setMimeType(PDF_MIME_TYPE);
		
		// == Base64OptRefContentType
		Base64OptRefContentType base64OptRefContentType = new Base64OptRefContentType();
		base64OptRefContentType.setBase64Content(data);
		
		// == CMSDataObjectRequiredMetaType
		CMSDataObjectRequiredMetaType cmsDataObjectRequiredMetaType = new CMSDataObjectRequiredMetaType();
		cmsDataObjectRequiredMetaType.setMetaInfo(metaInfoType);
		cmsDataObjectRequiredMetaType.setContent(base64OptRefContentType);
		if(byteRange.length > 0) {
			ExcludedByteRangeType excludeByteRange = new ExcludedByteRangeType();
			excludeByteRange.setFrom(new BigInteger(String.valueOf(exclude_range[0])));
			excludeByteRange.setTo(new BigInteger(String.valueOf(exclude_range[1])));
			cmsDataObjectRequiredMetaType.setExcludedByteRange(excludeByteRange);
		}
		
		
		// == CreateCMSSignatureRequestType
		CreateCMSSignatureRequestType request = new CreateCMSSignatureRequestType();
		request.setKeyboxIdentifier(SecureSignatureKeypair);
		request.setDataObject(cmsDataObjectRequiredMetaType);
		request.setStructure(DETACHED);
		
		return request;
	}

}