/*
 * Created on 15/May/2003
 *
 * 
 */
package net.sourceforge.fenixedu.presentationTier.Action.teacher;

import java.util.Collection;
import java.util.Collections;
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.dataTransferObject.InfoSiteTeacherStudentsEnrolledList;
import net.sourceforge.fenixedu.dataTransferObject.InfoWrittenEvaluationEnrolment;
import net.sourceforge.fenixedu.dataTransferObject.SiteView;
import net.sourceforge.fenixedu.presentationTier.Action.base.FenixAction;
import net.sourceforge.fenixedu.presentationTier.Action.exceptions.FenixActionException;
import net.sourceforge.fenixedu.presentationTier.Action.resourceAllocationManager.utils.ServiceUtils;

import org.apache.commons.beanutils.BeanComparator;
import org.apache.commons.collections.CollectionUtils;
import org.apache.commons.collections.Predicate;
import org.apache.commons.collections.comparators.ComparatorChain;
import org.apache.commons.collections.comparators.ReverseComparator;
import org.apache.struts.action.ActionError;
import org.apache.struts.action.ActionErrors;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;

public class ShowStudentsEnrolledInExamAction extends FenixAction {

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

	final IUserView userView = getUserView(request);

	final Integer executionCourseCode = Integer.valueOf(request.getParameter("objectCode"));
	final Integer writtenEvaluationCode = Integer.valueOf(request.getParameter("evaluationCode"));

	final Object[] args = { executionCourseCode, writtenEvaluationCode };
	SiteView siteView = null;
	try {
	    siteView = (SiteView) ServiceUtils.executeService("ReadStudentsEnrolledInWrittenEvaluation", args);
	} catch (FenixServiceException e) {
	    ActionErrors actionErrors = new ActionErrors();
	    actionErrors.add(e.getMessage(), new ActionError(e.getMessage()));
	    saveErrors(request, actionErrors);
	    return mapping.getInputForward();
	}

	InfoSiteTeacherStudentsEnrolledList infoSiteTeacherStudentsEnrolledList = (InfoSiteTeacherStudentsEnrolledList) siteView
		.getComponent();

	ComparatorChain comparatorChain = new ComparatorChain();

	comparatorChain.addComparator(new ReverseComparator(new BeanComparator("infoRoom.capacidadeExame")));
	comparatorChain.addComparator(new BeanComparator("infoRoom.nome"));
	comparatorChain.addComparator(new BeanComparator("infoStudent.number"));

	// Select all the objects with room to later sort them
	List infoWrittenEvaluationEnrolmentList = (List) CollectionUtils.select(infoSiteTeacherStudentsEnrolledList
		.getInfoWrittenEvaluationEnrolmentList(), new Predicate() {
	    public boolean evaluate(Object input) {
		InfoWrittenEvaluationEnrolment infoWrittenEvaluationEnrolment = (InfoWrittenEvaluationEnrolment) input;
		return infoWrittenEvaluationEnrolment.getInfoRoom() != null;
	    }
	});

	Collections.sort(infoWrittenEvaluationEnrolmentList, comparatorChain);
	Collection collection = CollectionUtils.subtract(infoSiteTeacherStudentsEnrolledList
		.getInfoWrittenEvaluationEnrolmentList(), infoWrittenEvaluationEnrolmentList);
	infoSiteTeacherStudentsEnrolledList.setInfoWrittenEvaluationEnrolmentList((List) collection);
	infoSiteTeacherStudentsEnrolledList.getInfoWrittenEvaluationEnrolmentList().addAll(infoWrittenEvaluationEnrolmentList);

	request.setAttribute("siteView", siteView);
	request.setAttribute("objectCode", executionCourseCode);
	request.setAttribute("evaluationCode", writtenEvaluationCode);

	return mapping.findForward("showStudents");

    }
}