/*
 * Created on 8/Set/2003
 */
package net.sourceforge.fenixedu.presentationTier.Action.manager;

import net.sourceforge.fenixedu.applicationTier.Servico.manager.ReadAvailableExecutionPeriods;

import java.util.ArrayList;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;

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

import net.sourceforge.fenixedu.applicationTier.IUserView;
import net.sourceforge.fenixedu.applicationTier.Filtro.exception.FenixFilterException;
import net.sourceforge.fenixedu.applicationTier.Servico.exceptions.FenixServiceException;
import net.sourceforge.fenixedu.applicationTier.Servico.exceptions.NonExistingServiceException;
import net.sourceforge.fenixedu.applicationTier.Servico.manager.ReadExecutionCoursesByCurricularCourse;
import net.sourceforge.fenixedu.dataTransferObject.InfoExecutionCourse;
import net.sourceforge.fenixedu.presentationTier.Action.base.FenixAction;
import net.sourceforge.fenixedu.presentationTier.Action.exceptions.FenixActionException;
import net.sourceforge.fenixedu.presentationTier.Action.exceptions.NonExistingActionException;
import net.sourceforge.fenixedu.presentationTier.Action.resourceAllocationManager.utils.ServiceUtils;
import net.sourceforge.fenixedu.presentationTier.Action.resourceAllocationManager.utils.PresentationConstants;

import org.apache.commons.beanutils.BeanComparator;
import org.apache.commons.collections.comparators.ComparatorChain;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;

import pt.ist.fenixWebFramework.security.UserView;

/**
 * @author lmac1
 */
public class ReadExecutionPeriodToAssociateExecutionCoursesAction extends FenixAction {

    public ActionForward execute(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response)
	    throws FenixActionException, FenixFilterException {

	IUserView userView = UserView.getUser();
	Integer curricularCourseId = Integer.valueOf(request.getParameter("curricularCourseId"));

	List executionCoursesList = null;
	try {
	    executionCoursesList = (List) ReadExecutionCoursesByCurricularCourse.run(curricularCourseId);

	} catch (NonExistingServiceException e) {
	    throw new NonExistingActionException(e.getMessage(), "");
	} catch (FenixServiceException fenixServiceException) {
	    throw new FenixActionException(fenixServiceException.getMessage());
	}

	// exclude executionPeriods of containing execution courses to assure
	// that there is only one execution course per execution period
	List unavailableExecutionPeriodsIds = new ArrayList();
	Iterator iter = executionCoursesList.iterator();
	while (iter.hasNext()) {
	    InfoExecutionCourse infoExecutionCourse = (InfoExecutionCourse) iter.next();

	    unavailableExecutionPeriodsIds.add(infoExecutionCourse.getInfoExecutionPeriod().getIdInternal());
	}

	try {
	    List infoExecutionPeriods = (List) ReadAvailableExecutionPeriods.run(unavailableExecutionPeriodsIds);

	    if (infoExecutionPeriods != null && !infoExecutionPeriods.isEmpty()) {

		// Collections.sort(infoExecutionPeriods, new
		// ExecutionPeriodComparator());
		ComparatorChain comparator = new ComparatorChain();
		comparator.addComparator(new BeanComparator("infoExecutionYear.year"), true);
		comparator.addComparator(new BeanComparator("name"), true);
		Collections.sort(infoExecutionPeriods, comparator);

		if (infoExecutionPeriods != null && !infoExecutionPeriods.isEmpty()) {
		    request.setAttribute(PresentationConstants.LIST_EXECUTION_PERIODS, infoExecutionPeriods);
		}

	    }
	} catch (FenixServiceException ex) {
	    throw new FenixActionException("Problemas de comunicação com a base de dados.", ex);
	}

	request.setAttribute("name", "associate");
	return mapping.findForward("viewExecutionPeriods");
    }
}