/*
 * Copyright 2017 Graz University of Technology EAAF-Core Components has been developed in a
 * cooperation between EGIZ, A-SIT Plus, A-SIT, and Graz University of Technology.
 *
 * Licensed under the EUPL, Version 1.2 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:
 * https://joinup.ec.europa.eu/news/understanding-eupl-v12
 *
 * 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.eaaf.core.impl.idp.controller.tasks;

import java.util.Set;

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

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

import at.gv.egiz.eaaf.core.api.idp.process.ExecutionContext;
import at.gv.egiz.eaaf.core.api.idp.process.ProcessEngine;
import at.gv.egiz.eaaf.core.exceptions.EaafException;
import at.gv.egiz.eaaf.core.exceptions.TaskExecutionException;
import at.gv.egiz.eaaf.core.impl.idp.auth.modules.AbstractAuthServletTask;
import at.gv.egiz.eaaf.core.impl.idp.auth.modules.ModuleRegistration;
import at.gv.egiz.eaaf.core.impl.idp.controller.protocols.RequestImpl;
import at.gv.egiz.eaaf.core.impl.idp.process.ExecutionContextImpl;

/**
 * Restart the authentication process-flow.
 *
 * @author tlenz
 *
 */
@Component("RestartAuthProzessManagement")
public class RestartAuthProzessManagement extends AbstractAuthServletTask {
  private static final Logger log = LoggerFactory.getLogger(RestartAuthProzessManagement.class);

  @Autowired
  ProcessEngine processEngine;
  @Autowired
  ModuleRegistration moduleRegistration;

  /*
   * (non-Javadoc)
   *
   * @see at.gv.egovernment.moa.id.process.springweb.MoaIdTask#execute(at.gv.
   * egovernment.moa.id.process. api.ExecutionContext,
   * javax.servlet.http.HttpServletRequest,
   * javax.servlet.http.HttpServletResponse)
   */
  @Override
  public void execute(final ExecutionContext executionContext, final HttpServletRequest request,
      final HttpServletResponse response) throws TaskExecutionException {
    try {

      if (this.pendingReq.isAbortedByUser()) {
        log.debug("AuthProcess was stopped. Forward to finalization ... ");
        performRedirectToProtocolFinialization(executionContext, pendingReq, request, response);

      } else {
        // create a new execution context and copy all elements to new context
        final ExecutionContext newec = new ExecutionContextImpl();
        final Set<String> entries = executionContext.keySet();
        for (final String key : entries) {
          newec.put(key, executionContext.get(key));

        }

        log.debug("Select new auth.-process and restart restart process-engine ... ");

        // select and create new process instance
        final String processDefinitionId =
            moduleRegistration.selectProcess(newec, pendingReq);
        if (processDefinitionId == null) {
          log.warn("No suitable authentication process found for SessionID "
              + pendingReq.getPendingRequestId());
          throw new EaafException("process.02", new Object[] { pendingReq.getPendingRequestId() });
        }

        final String processInstanceId =
            processEngine.createProcessInstance(processDefinitionId, newec);

        // keep process instance id in moa session
        ((RequestImpl) pendingReq).setProcessInstanceId(processInstanceId);

        // make sure pending request has been persisted before running the process
        try {
          requestStoreage.storePendingRequest(pendingReq);

        } catch (final EaafException e) {
          log.error("Database Error! MOASession is not stored!");
          throw new EaafException("internal.02", null);

        }

        log.info("Restart process-engine with auth.process:" + processDefinitionId);

        // start process
        processEngine.start(pendingReq);

      }

    } catch (final EaafException e) {
      throw new TaskExecutionException(pendingReq, e.getMessage(), e);

    } catch (final Exception e) {
      log.warn("RestartAuthProzessManagement has an internal error", e);
      throw new TaskExecutionException(pendingReq, e.getMessage(), e);

    }

  }

}