/**
 * Project sop 
 * 
 * Package presentationTier.Action.common
 * 
 * Created on 8/Jan/2003
 *
 */
package net.sourceforge.fenixedu.presentationTier.Action.commons;

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.commons.ReadCurrentExecutionPeriod;
import net.sourceforge.fenixedu.applicationTier.Servico.resourceAllocationManager.ReadExecutionDegreesByExecutionYear;
import net.sourceforge.fenixedu.dataTransferObject.CurricularYearAndSemesterAndInfoExecutionDegree;
import net.sourceforge.fenixedu.dataTransferObject.InfoDegree;
import net.sourceforge.fenixedu.dataTransferObject.InfoExecutionDegree;
import net.sourceforge.fenixedu.dataTransferObject.InfoExecutionPeriod;
import net.sourceforge.fenixedu.dataTransferObject.comparators.ComparatorByNameForInfoExecutionDegree;
import net.sourceforge.fenixedu.presentationTier.Action.exceptions.FenixActionException;
import net.sourceforge.fenixedu.presentationTier.Action.resourceAllocationManager.base.FenixDateAndTimeDispatchAction;
import net.sourceforge.fenixedu.presentationTier.Action.resourceAllocationManager.utils.RequestUtils;
import net.sourceforge.fenixedu.presentationTier.Action.resourceAllocationManager.utils.PresentationConstants;

import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.DynaActionForm;
import org.apache.struts.util.LabelValueBean;

import pt.ist.fenixWebFramework.security.UserView;

/**
 * @author jpvl
 */
public class ChooseContextDispatchAction extends FenixDateAndTimeDispatchAction {

    protected static final String INFO_DEGREE_INITIALS_PARAMETER = "degreeInitials";

    protected static final String SEMESTER_PARAMETER = "semester";

    protected static final String CURRICULAR_YEAR_PARAMETER = "curricularYear";

    /*
     * (non-Javadoc)
     * 
     * @see
     * org.apache.struts.actions.DispatchAction#dispatchMethod(org.apache.struts
     * .action.ActionMapping, org.apache.struts.action.ActionForm,
     * javax.servlet.http.HttpServletRequest,
     * javax.servlet.http.HttpServletResponse, java.lang.String)
     */
    public ActionForward prepare(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response)
	    throws Exception {

	String inputPage = request.getParameter(PresentationConstants.INPUT_PAGE);
	String nextPage = request.getParameter(PresentationConstants.NEXT_PAGE);
	if (inputPage != null)
	    request.setAttribute(PresentationConstants.INPUT_PAGE, inputPage);
	if (nextPage != null)
	    request.setAttribute(PresentationConstants.NEXT_PAGE, nextPage);

	IUserView userView = UserView.getUser();

	InfoExecutionPeriod infoExecutionPeriod = setExecutionContext(request);

	// TODO: this semester and curricular year list needs to be
	// refactored in order to incorporate masters
	/* Criar o bean de semestres */
	List semestres = new ArrayList();
	semestres.add(new LabelValueBean("escolher", ""));
	semestres.add(new LabelValueBean("1 º", "1"));
	semestres.add(new LabelValueBean("2 º", "2"));
	request.setAttribute("semestres", semestres);

	/* Criar o bean de anos curricutares */
	List anosCurriculares = new ArrayList();
	anosCurriculares.add(new LabelValueBean("escolher", ""));
	anosCurriculares.add(new LabelValueBean("1 º", "1"));
	anosCurriculares.add(new LabelValueBean("2 º", "2"));
	anosCurriculares.add(new LabelValueBean("3 º", "3"));
	anosCurriculares.add(new LabelValueBean("4 º", "4"));
	anosCurriculares.add(new LabelValueBean("5 º", "5"));
	request.setAttribute(PresentationConstants.CURRICULAR_YEAR_LIST_KEY, anosCurriculares);

	/* Cria o form bean com as licenciaturas em execucao. */

	List executionDegreeList = ReadExecutionDegreesByExecutionYear.run(infoExecutionPeriod.getInfoExecutionYear());

	List licenciaturas = new ArrayList();

	licenciaturas.add(new LabelValueBean("escolher", ""));

	Collections.sort(executionDegreeList, new ComparatorByNameForInfoExecutionDegree());

	Iterator iterator = executionDegreeList.iterator();

	int index = 0;
	while (iterator.hasNext()) {
	    InfoExecutionDegree infoExecutionDegree = (InfoExecutionDegree) iterator.next();
	    String name = infoExecutionDegree.getInfoDegreeCurricularPlan().getInfoDegree().getNome();

	    name = infoExecutionDegree.getInfoDegreeCurricularPlan().getInfoDegree().getDegreeType().toString() + " em " + name;

	    name += duplicateInfoDegree(executionDegreeList, infoExecutionDegree) ? "-"
		    + infoExecutionDegree.getInfoDegreeCurricularPlan().getName() : "";

	    licenciaturas.add(new LabelValueBean(name, String.valueOf(index++)));
	}

	request.setAttribute(PresentationConstants.INFO_EXECUTION_DEGREE_LIST_KEY, executionDegreeList);

	request.setAttribute(PresentationConstants.DEGREES, licenciaturas);

	if (inputPage != null) {
	    return mapping.findForward(inputPage);
	}

	// TODO : throw a proper exception
	throw new Exception("SomeOne is messing around with the links");
    }

    public ActionForward preparePublic(ActionMapping mapping, ActionForm form, HttpServletRequest request,
	    HttpServletResponse response) throws Exception {
	String inputPage = request.getParameter(PresentationConstants.INPUT_PAGE);

	InfoExecutionPeriod infoExecutionPeriod = (InfoExecutionPeriod) request
		.getAttribute(PresentationConstants.EXECUTION_PERIOD);

	// TODO: this semester and curricular year list needs to be refactored
	// in order to incorporate masters
	/* Criar o bean de semestres */
	List semestres = new ArrayList();
	semestres.add(new LabelValueBean("escolher", ""));
	semestres.add(new LabelValueBean("1 º", "1"));
	semestres.add(new LabelValueBean("2 º", "2"));
	request.setAttribute("semestres", semestres);

	/* Criar o bean de anos curricutares */
	List anosCurriculares = new ArrayList();
	anosCurriculares.add(new LabelValueBean("escolher", ""));
	anosCurriculares.add(new LabelValueBean("1 º", "1"));
	anosCurriculares.add(new LabelValueBean("2 º", "2"));
	anosCurriculares.add(new LabelValueBean("3 º", "3"));
	anosCurriculares.add(new LabelValueBean("4 º", "4"));
	anosCurriculares.add(new LabelValueBean("5 º", "5"));
	request.setAttribute("curricularYearList", anosCurriculares);

	/* Cria o form bean com as licenciaturas em execucao. */

	List executionDegreeList = ReadExecutionDegreesByExecutionYear.run(infoExecutionPeriod.getInfoExecutionYear());

	List licenciaturas = new ArrayList();

	licenciaturas.add(new LabelValueBean("escolher", ""));

	Collections.sort(executionDegreeList, new ComparatorByNameForInfoExecutionDegree());

	Iterator iterator = executionDegreeList.iterator();

	int index = 0;
	while (iterator.hasNext()) {
	    InfoExecutionDegree infoExecutionDegree = (InfoExecutionDegree) iterator.next();
	    String name = infoExecutionDegree.getInfoDegreeCurricularPlan().getInfoDegree().getNome();

	    name = infoExecutionDegree.getInfoDegreeCurricularPlan().getInfoDegree().getDegreeType().toString() + " em " + name;

	    name += duplicateInfoDegree(executionDegreeList, infoExecutionDegree) ? "-"
		    + infoExecutionDegree.getInfoDegreeCurricularPlan().getName() : "";

	    licenciaturas.add(new LabelValueBean(name, String.valueOf(index++)));
	}

	request.setAttribute("degreeList", licenciaturas);

	if (inputPage != null) {
	    return mapping.findForward(inputPage);
	}

	// TODO : throw a proper exception
	throw new Exception("SomeOne is messing around with the links");

    }

    public ActionForward nextPage(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response)
	    throws Exception {

	DynaActionForm escolherContextoForm = (DynaActionForm) form;

	String nextPage = (String) request.getAttribute(PresentationConstants.NEXT_PAGE);
	if (nextPage == null) {
	    nextPage = request.getParameter(PresentationConstants.NEXT_PAGE);
	}

	Integer semestre = ((InfoExecutionPeriod) request.getAttribute(PresentationConstants.EXECUTION_PERIOD)).getSemester();
	Integer anoCurricular = (Integer) escolherContextoForm.get("curricularYear");

	int index = Integer.parseInt((String) escolherContextoForm.get("index"));

	request.setAttribute("anoCurricular", anoCurricular);
	request.setAttribute("semestre", semestre);

	List infoExecutionDegreeList = ReadExecutionDegreesByExecutionYear.run(((InfoExecutionPeriod) request
		.getAttribute(PresentationConstants.EXECUTION_PERIOD)).getInfoExecutionYear());
	List licenciaturas = new ArrayList();
	licenciaturas.add(new LabelValueBean("escolher", ""));
	Collections.sort(infoExecutionDegreeList, new ComparatorByNameForInfoExecutionDegree());
	// ////

	InfoExecutionDegree infoExecutionDegree = (InfoExecutionDegree) infoExecutionDegreeList.get(index);

	if (infoExecutionDegree != null) {
	    CurricularYearAndSemesterAndInfoExecutionDegree cYSiED = new CurricularYearAndSemesterAndInfoExecutionDegree(
		    anoCurricular, semestre, infoExecutionDegree);
	    request.setAttribute(PresentationConstants.CONTEXT_KEY, cYSiED);

	    request.setAttribute(PresentationConstants.CURRICULAR_YEAR_KEY, anoCurricular);
	    request.setAttribute(PresentationConstants.CURRICULAR_YEAR_OID, anoCurricular.toString());
	    request.setAttribute(PresentationConstants.INFO_EXECUTION_DEGREE_KEY, infoExecutionDegree);
	    request.setAttribute(PresentationConstants.EXECUTION_DEGREE, infoExecutionDegree);
	    request.setAttribute(PresentationConstants.EXECUTION_DEGREE_OID, infoExecutionDegree.getIdInternal().toString());
	} else {
	    return mapping.findForward("Licenciatura execucao inexistente");
	}

	if (nextPage != null) {
	    return mapping.findForward(nextPage);
	}

	// TODO : throw a proper exception
	throw new Exception("SomeOne is messing around with the links");
    }

    public ActionForward nextPagePublic(ActionMapping mapping, ActionForm form, HttpServletRequest request,
	    HttpServletResponse response) throws FenixActionException, FenixFilterException {
	DynaActionForm escolherContextoForm = (DynaActionForm) form;

	InfoExecutionPeriod infoExecutionPeriod = (InfoExecutionPeriod) request
		.getAttribute(PresentationConstants.EXECUTION_PERIOD);

	Integer semestre = infoExecutionPeriod.getSemester();
	Integer anoCurricular = (Integer) escolherContextoForm.get("curYear");

	// Integer degreeCurricularPlanId =
	// getFromRequest("degreeCurricularPlanID", request);
	request.setAttribute("degreeCurricularPlanID", "");

	// Integer degreeId = getFromRequest("degreeID", request);
	request.setAttribute("degreeID", "");

	Integer index = Integer.valueOf((String) escolherContextoForm.get("index"));

	request.setAttribute("curYear", anoCurricular);
	request.setAttribute("semester", semestre);

	List infoExecutionDegreeList;
	infoExecutionDegreeList = ReadExecutionDegreesByExecutionYear.run(infoExecutionPeriod.getInfoExecutionYear());
	Collections.sort(infoExecutionDegreeList, new ComparatorByNameForInfoExecutionDegree());

	InfoExecutionDegree infoExecutionDegree = (InfoExecutionDegree) infoExecutionDegreeList.get(index.intValue());
	request.setAttribute(PresentationConstants.EXECUTION_DEGREE, infoExecutionDegree);

	if (infoExecutionDegree == null) {
	    return mapping.findForward("Licenciatura execucao inexistente");
	}

	RequestUtils.setExecutionDegreeToRequest(request, infoExecutionDegree);

	String nextPage = request.getParameter("nextPage");

	if (nextPage != null) {
	    return mapping.findForward(nextPage);
	}

	// TODO : throw a proper exception
	throw new FenixActionException("SomeOne is messing around with the links");

    }

    /**
     * Method existencesOfInfoDegree.
     * 
     * @param executionDegreeList
     * @param infoExecutionDegree
     * @return int
     */
    private boolean duplicateInfoDegree(List executionDegreeList, InfoExecutionDegree infoExecutionDegree) {
	InfoDegree infoDegree = infoExecutionDegree.getInfoDegreeCurricularPlan().getInfoDegree();
	Iterator iterator = executionDegreeList.iterator();

	while (iterator.hasNext()) {
	    InfoExecutionDegree infoExecutionDegree2 = (InfoExecutionDegree) iterator.next();
	    if (infoDegree.equals(infoExecutionDegree2.getInfoDegreeCurricularPlan().getInfoDegree())
		    && !(infoExecutionDegree.equals(infoExecutionDegree2)))
		return true;

	}
	return false;
    }

    /**
     * Method setExecutionContext.
     * 
     * @param request
     */
    private InfoExecutionPeriod setExecutionContext(HttpServletRequest request) throws Exception {

	InfoExecutionPeriod infoExecutionPeriod = (InfoExecutionPeriod) request
		.getAttribute(PresentationConstants.INFO_EXECUTION_PERIOD_KEY);
	if (infoExecutionPeriod == null) {
	    IUserView userView = UserView.getUser();
	    infoExecutionPeriod = ReadCurrentExecutionPeriod.run();

	    request.setAttribute(PresentationConstants.INFO_EXECUTION_PERIOD_KEY, infoExecutionPeriod);
	}
	return infoExecutionPeriod;
    }

}