/*
 * Created on 31/Jul/2003, 19:23:52
 *
 *By Goncalo Luiz gedl [AT] rnl [DOT] ist [DOT] utl [DOT] pt
 */
package net.sourceforge.fenixedu.presentationTier.Action.Seminaries;

import java.util.Iterator;
import java.util.LinkedList;
import java.util.List;

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

import net.sourceforge.fenixedu.applicationTier.IUserView;
import net.sourceforge.fenixedu.dataTransferObject.InfoCurricularCourse;
import net.sourceforge.fenixedu.dataTransferObject.InfoStudent;
import net.sourceforge.fenixedu.dataTransferObject.Seminaries.InfoEquivalency;
import net.sourceforge.fenixedu.dataTransferObject.Seminaries.InfoSeminaryWithEquivalencies;
import net.sourceforge.fenixedu.framework.factory.ServiceManagerServiceFactory;
import net.sourceforge.fenixedu.presentationTier.Action.base.FenixAction;
import net.sourceforge.fenixedu.presentationTier.Action.exceptions.FenixActionException;

import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;

/**
 * @author Goncalo Luiz gedl [AT] rnl [DOT] ist [DOT] utl [DOT] pt
 * 
 * 
 *         Created at 31/Jul/2003, 19:23:52
 * 
 */
public class ShowCandidacyOptions extends FenixAction {
    public ActionForward execute(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response)
	    throws FenixActionException {
	IUserView userView = getUserView(request);
	String seminaryIDString = request.getParameter("objectCode");
	Integer seminaryID;
	if (seminaryIDString == null)
	    throw new FenixActionException(mapping.findForward("invalidQueryString"));
	try {
	    seminaryID = Integer.valueOf(seminaryIDString);
	} catch (Exception ex) {
	    throw new FenixActionException(mapping.findForward("invalidQueryString"));
	}
	InfoSeminaryWithEquivalencies seminary = null;
	InfoStudent student = null;
	List disciplines = null;
	ActionForward destiny = null;
	try {
	    Object[] argsReadSeminary = { seminaryID };
	    Object[] argsReadStudent = { userView.getUtilizador() };
	    seminary = (InfoSeminaryWithEquivalencies) ServiceManagerServiceFactory.executeService("Seminaries.GetSeminary",
		    argsReadSeminary);
	    student = (InfoStudent) ServiceManagerServiceFactory.executeService("ReadStudentByUsername", argsReadStudent);
	    Object[] ReadCurricularCoursesByUsername = { userView.getUtilizador() };
	    disciplines = (List) ServiceManagerServiceFactory.executeService("student.ReadCurricularCoursesByUsername",
		    ReadCurricularCoursesByUsername);
	    List avaliableEquivalencies = new LinkedList();
	    for (Iterator iterator = disciplines.iterator(); iterator.hasNext();) {
		InfoCurricularCourse curricularCourse = (InfoCurricularCourse) iterator.next();
		for (Iterator equivalencyIterator = seminary.getEquivalencies().iterator(); equivalencyIterator.hasNext();) {
		    InfoEquivalency equivalency = (InfoEquivalency) equivalencyIterator.next();
		    if (equivalency.getCurricularCourse().getIdInternal().equals(curricularCourse.getIdInternal())) {
			avaliableEquivalencies.add(equivalency);
			break;
		    }
		}
	    }
	    seminary.setEquivalencies(avaliableEquivalencies);
	    Object[] argsReadCandidacies = { student.getIdInternal(), seminaryID };
	    List candidacies = (List) ServiceManagerServiceFactory.executeService(
		    "Seminaries.GetCandidaciesByStudentIDAndSeminaryID", argsReadCandidacies);
	    if (candidacies.size() >= seminary.getAllowedCandidaciesPerStudent().intValue()) {
		addErrorMessage(request, "error.seminaries.candidaciesLimitReached", "error.seminaries.candidaciesLimitReached",
			String.valueOf(seminary.getAllowedCandidaciesPerStudent()));

		destiny = mapping.findForward("candidaciesLimitReached");
	    } else {
		destiny = mapping.findForward("showCandidacyOptions");
		request.setAttribute("seminary", seminary);
	    }

	} catch (Exception e) {
	    throw new FenixActionException(e);
	}

	return destiny;
    }
}