/*
 * 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.modules.sl20_auth;

import java.util.Arrays;
import java.util.List;

import javax.annotation.PostConstruct;

import org.springframework.beans.factory.annotation.Autowired;

import at.gv.egiz.eaaf.core.api.data.EAAFConstants;
import at.gv.egiz.eaaf.core.api.idp.ISPConfiguration;
import at.gv.egiz.eaaf.core.api.idp.auth.modules.AuthModule;
import at.gv.egiz.eaaf.core.api.idp.process.ExecutionContext;
import at.gv.egovernment.moa.id.auth.modules.sl20_auth.sl20.SL20Constants;
import at.gv.egovernment.moa.id.commons.api.AuthConfiguration;
import at.gv.egovernment.moa.id.commons.config.MOAIDConfigurationConstants;
import at.gv.egovernment.moa.id.moduls.AuthenticationManager;
import at.gv.egovernment.moa.logging.Logger;
import at.gv.egovernment.moa.util.MiscUtil;

/**
 * @author tlenz
 *
 */
public class SL20AuthenticationModulImpl implements AuthModule {	
	private int priority = 3;
	public static final List<String> VDA_TYPE_IDS = Arrays.asList("1", "2", "3", "4");
	
	@Autowired(required=true) protected AuthConfiguration authConfig;
	@Autowired(required=true) private AuthenticationManager authManager;
	
	@Override
	public int getPriority() { 
		return priority; 
	}

	/**
	 * Sets the priority of this module. Default value is {@code 0}.
	 * @param priority The priority.
	 */
	public void setPriority(int priority) {
		this.priority = priority;
	}

	@PostConstruct
	protected void initalSL20Authentication() {
		//parameter to whiteList
		authManager.addHeaderNameToWhiteList(SL20Constants.HTTP_HEADER_SL20_CLIENT_TYPE);
		authManager.addHeaderNameToWhiteList(SL20Constants.HTTP_HEADER_SL20_VDA_TYPE);
		
	}
	
	
	/* (non-Javadoc)
	 * @see at.gv.egovernment.moa.id.auth.modules.AuthModule#selectProcess(at.gv.egovernment.moa.id.process.api.ExecutionContext)
	 */
	@Override
	public String selectProcess(ExecutionContext context) {
		ISPConfiguration spConfig = (ISPConfiguration) context.get(EAAFConstants.PROCESSCONTEXT_SP_CONFIG);
//		if (spConfigObj != null && spConfigObj instanceof IOAAuthParameters)
//			spConfig = (IOAAuthParameters)spConfigObj;
					
		String sl20ClientTypeHeader = (String) context.get(SL20Constants.HTTP_HEADER_SL20_CLIENT_TYPE.toLowerCase());
		String sl20VDATypeHeader = (String)  context.get(SL20Constants.HTTP_HEADER_SL20_VDA_TYPE.toLowerCase());
		
		if (spConfig != null && 
				MiscUtil.isNotEmpty(spConfig.getConfigurationValue(MOAIDConfigurationConstants.SERVICE_AUTH_SL20_ENABLED)) &&
					Boolean.valueOf(spConfig.getConfigurationValue(MOAIDConfigurationConstants.SERVICE_AUTH_SL20_ENABLED))) {
			Logger.debug("SL2.0 is enabled for " + spConfig.getUniqueIdentifier());
			Logger.trace(SL20Constants.HTTP_HEADER_SL20_CLIENT_TYPE +  ": " + sl20ClientTypeHeader);			
			Logger.trace(SL20Constants.HTTP_HEADER_SL20_VDA_TYPE +  ": " + sl20VDATypeHeader);
			return "SL20Authentication";
			
		} else {
			Logger.trace("SL2.0 is NOT enabled for " + spConfig.getUniqueIdentifier());
			return null;
			
		}
		
		
//		if ( StringUtils.isNotBlank(sl20ClientTypeHeader) 
////				&& (
////						StringUtils.isNotBlank(sl20VDATypeHeader) 
////						//&& VDA_TYPE_IDS.contains(sl20VDATypeHeader.trim())
////				   ) 
//				) {
//			Logger.trace(SL20Constants.HTTP_HEADER_SL20_CLIENT_TYPE +  "' header found");			
//			return "SL20Authentication";
//			
//		} else {
//			Logger.trace("No '" + SL20Constants.HTTP_HEADER_SL20_CLIENT_TYPE +  "' header found");
//			return null;
//			
//		}		
	}

	/* (non-Javadoc)
	 * @see at.gv.egovernment.moa.id.auth.modules.AuthModule#getProcessDefinitions()
	 */
	@Override
	public String[] getProcessDefinitions() {
		return new String[] { "classpath:sl20.Authentication.process.xml" };
	}

}