/*
 * Copyright 2019 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.eidproxyauth;

import java.io.Serializable;

import javax.annotation.PostConstruct;

import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;

import at.gv.egiz.eaaf.core.api.IRequest;
import at.gv.egiz.eaaf.core.api.idp.IConfiguration;
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.commons.config.MOAIDConfigurationConstants;
import at.gv.egovernment.moa.id.moduls.AuthenticationManager;
import at.gv.egovernment.moa.logging.Logger;

/**
 * @author tlenz
 *
 */
public class EIDProxyAuthModuleImpl implements AuthModule {
	
	@Autowired(required=true) private IConfiguration authConfig;
	@Autowired(required=true) private AuthenticationManager authManager;
		
	private int priority = 0;
	private final String AUTH_PROCESS_NAME = "EIDAuthentication";	
	
	@PostConstruct
	protected void initalizeEIDProxyAuthentication() {
		//parameter to whiteList
		authManager.addParameterNameToWhiteList(EIDProxyAuthConstants.HTTP_PARAM_EIDPROXY_AUTH_SELECTION);
		
	}
	
	/* (non-Javadoc)
	 * @see at.gv.egovernment.moa.id.auth.modules.AuthModule#getPriority()
	 */
	@Override
	public int getPriority() {
		return priority;
	} 

	/* (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, IRequest pendingReq) {
		
	  if (Boolean.parseBoolean(
          pendingReq.getServiceProviderConfiguration().getConfigurationValue(
              MOAIDConfigurationConstants.SERVICE_AUTH_AUSTRIAN_EID_DEMO_MODE, 
              String.valueOf(false)))) {
	    Logger.debug("SP: " + pendingReq.getSPEntityId() + " activates E-ID mode.");
	    return AUTH_PROCESS_NAME;
	    
	  } else {	  
  		if (authConfig.getBasicConfigurationBoolean(EIDProxyAuthConstants.CONFIG_PROPS_DISABLE_PROCESS_ENFORCEMENT, true)) {
  		  Logger.trace("Disable E-ID enforcment is 'true' ");
  			Serializable paramObj = context.get(EIDProxyAuthConstants.HTTP_PARAM_EIDPROXY_AUTH_SELECTION);
  			if (paramObj != null ) {
  				if (paramObj instanceof String) {		
  					String param = (String)paramObj;
  					if (StringUtils.isNotEmpty(param) && Boolean.parseBoolean(param)) {
  						Logger.debug("Manually selected E-ID authentication process  ");
  						return AUTH_PROCESS_NAME;
  					}
  				}
  			}
  			
  			return null;
  
  		} else {
  		  Logger.trace("Select E-ID authentication process ... ");		
  		  return AUTH_PROCESS_NAME;
	    
  		}
	  }		
	}

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

	/**
	 * @param priority the priority to set
	 */
	public void setPriority(int priority) {
		this.priority = priority;
		
	}
}