/*
 * 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.elgamandates.tasks;

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

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

import at.gv.egiz.eaaf.core.api.gui.IGUIBuilderConfiguration;
import at.gv.egiz.eaaf.core.api.gui.IGUIFormBuilder;
import at.gv.egiz.eaaf.core.api.idp.process.ExecutionContext;
import at.gv.egiz.eaaf.core.exceptions.GUIBuildException;
import at.gv.egiz.eaaf.core.exceptions.TaskExecutionException;
import at.gv.egiz.eaaf.core.impl.idp.auth.modules.AbstractAuthServletTask;
import at.gv.egovernment.moa.id.auth.frontend.builder.SPSpecificGUIBuilderConfigurationWithFileSystemLoad;
import at.gv.egovernment.moa.id.auth.modules.elgamandates.ELGAMandatesAuthConstants;
import at.gv.egovernment.moa.id.auth.modules.elgamandates.utils.ELGAMandateUtils;
import at.gv.egovernment.moa.id.auth.servlet.GeneralProcessEngineSignalController;
import at.gv.egovernment.moa.id.commons.api.exceptions.MOAIDException;
import at.gv.egovernment.moa.id.commons.config.MOAIDConfigurationConstants;
import at.gv.egovernment.moa.logging.Logger;

/**
 * @author tlenz
 *
 */
@Component("SelectMandateServiceTask")
public class SelectMandateServiceTask extends AbstractAuthServletTask {

	@Autowired IGUIFormBuilder guiBuilder;
	
	/* (non-Javadoc) 
	 * @see at.gv.egovernment.moa.id.auth.modules.AbstractAuthServletTask#execute(at.gv.egovernment.moa.id.process.api.ExecutionContext, javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse)
	 */
	@Override
	public void execute(ExecutionContext executionContext, HttpServletRequest request, HttpServletResponse response)
			throws TaskExecutionException {
		try {
			//check if Service-Provider allows ELGA-mandates
			if (ELGAMandateUtils.checkServiceProviderAgainstELGAModulConfigration(authConfig, pendingReq)) {			
				Logger.trace("Build GUI for mandate-service selection ...");
						 
				IGUIBuilderConfiguration config = new SPSpecificGUIBuilderConfigurationWithFileSystemLoad(
						pendingReq,  
						ELGAMandatesAuthConstants.TEMPLATE_MANDATE_SERVICE_SELECTION,
						MOAIDConfigurationConstants.SERVICE_AUTH_TEMPLATES_ELGAMANDATESERVICESELECTION_URL,
						GeneralProcessEngineSignalController.ENDPOINT_GENERIC,
						authConfig.getConfigurationRootDirectory().toURL().toString());
			
				guiBuilder.build(response, config, "Mandate-Service selection");
		
				Logger.debug("GUI for mandate-service selection is generated. Wait for user interaction ... ");
				
			} else {
				Logger.warn("ILLEGAL STATE FOUND! Reason: Service-Provider does not allow ELGA Mandate-Service, but process is in such a service step.");
				throw new MOAIDException("process.03", new Object[]{"Current auth. process switched to an illegal step. Process is aborted for security reasons."});
				
			}
			
		} catch (GUIBuildException e) {
			Logger.warn("Can not build GUI:'Mandate-Service selection'. Msg:" + e.getMessage());
			throw new TaskExecutionException(pendingReq, 
					"Can not build GUI. Msg:" + e.getMessage(), 
					new MOAIDException("builder.09", new Object[]{e.getMessage()}, e));
						
		} catch (Exception e) {
			Logger.info("Mandate-Service selection: General Exception. Msg:" + e.getMessage());
			throw new TaskExecutionException(pendingReq, "ELGA mandate-service: General Exception.", e);
			
		}

	}
	
}