package net.sourceforge.fenixedu.presentationTier.Action.manager;

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

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

import java.text.ParseException;
import java.util.Collections;
import java.util.Date;
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.ReadExecutionPeriods;
import net.sourceforge.fenixedu.applicationTier.Servico.exceptions.FenixServiceException;
import net.sourceforge.fenixedu.applicationTier.Servico.manager.ReadEnrolmentPeriods;
import net.sourceforge.fenixedu.dataTransferObject.InfoEnrolmentPeriod;
import net.sourceforge.fenixedu.dataTransferObject.InfoExecutionPeriod;
import net.sourceforge.fenixedu.domain.degree.DegreeType;
import net.sourceforge.fenixedu.framework.factory.ServiceManagerServiceFactory;
import net.sourceforge.fenixedu.presentationTier.Action.base.FenixDispatchAction;

import org.apache.commons.beanutils.BeanComparator;
import org.apache.commons.collections.comparators.ComparatorChain;
import org.apache.commons.lang.StringUtils;
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 pt.utl.ist.fenix.tools.util.DateFormatUtil;

public class ManageEnrolementPeriodsDA extends FenixDispatchAction {

    public ActionForward prepare(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response)
	    throws Exception {
	final IUserView userView = getUserView(request);
	final DynaActionForm actionForm = (DynaActionForm) form;

	setInfoExecutionPeriods(request, userView);

	final String executionPeriodIDString = (String) actionForm.get("executionPeriodID");
	if (isValidObjectID(executionPeriodIDString)) {
	    setInfoEnrolmentPeriods(request, userView, executionPeriodIDString);
	}

	return mapping.findForward("showEnrolementPeriods");
    }

    public ActionForward changePeriodValues(ActionMapping mapping, ActionForm form, HttpServletRequest request,
	    HttpServletResponse response) throws Exception {
	final IUserView userView = getUserView(request);
	final DynaActionForm actionForm = (DynaActionForm) form;

	final String enrolmentPeriodIDString = (String) actionForm.get("enrolmentPeriodID");
	final String startDateString = (String) actionForm.get("startDate");
	final String endDateString = (String) actionForm.get("endDate");

	final String startTimeString = (String) actionForm.get("startTime");
	final String endTimeString = (String) actionForm.get("endTime");

	ChangeEnrolmentPeriodValues.run(Integer.valueOf(enrolmentPeriodIDString), getDate(startDateString, startTimeString),
		getDate(endDateString, endTimeString));

	return prepare(mapping, form, request, response);
    }

    public ActionForward createPeriods(ActionMapping mapping, ActionForm form, HttpServletRequest request,
	    HttpServletResponse response) throws Exception {
	final IUserView userView = getUserView(request);
	final DynaActionForm actionForm = (DynaActionForm) form;

	final String executionPeriodIDString = (String) actionForm.get("executionPeriodID");
	final String degreeTypeString = (String) actionForm.get("degreeType");
	final String enrolmentPeriodClassString = (String) actionForm.get("enrolmentPeriodClass");
	final String startDateString = (String) actionForm.get("startDate");
	final String endDateString = (String) actionForm.get("endDate");

	final String startTimeString = (String) actionForm.get("startTime");
	final String endTimeString = (String) actionForm.get("endTime");

	final DegreeType degreeType = degreeTypeString.length() == 0 ? null : DegreeType.valueOf(degreeTypeString);

	CreateEnrolmentPeriods.run(Integer.valueOf(executionPeriodIDString), degreeType, enrolmentPeriodClassString, getDate(
		startDateString, startTimeString), getDate(endDateString, endTimeString));

	return prepare(mapping, form, request, response);
    }

    private void setInfoEnrolmentPeriods(final HttpServletRequest request, final IUserView userView,
	    final String executionPeriodIDString) throws FenixFilterException, FenixServiceException {

	final List<InfoEnrolmentPeriod> infoEnrolmentPeriods = (List<InfoEnrolmentPeriod>) ReadEnrolmentPeriods.run(Integer
		.valueOf(executionPeriodIDString));
	sortInfoEnrolmentPeriods(infoEnrolmentPeriods);
	request.setAttribute("infoEnrolmentPeriods", infoEnrolmentPeriods);
    }

    private void setInfoExecutionPeriods(final HttpServletRequest request, final IUserView userView) throws FenixFilterException,
	    FenixServiceException {
	final List<InfoExecutionPeriod> infoExecutionPeriods = (List<InfoExecutionPeriod>) ReadExecutionPeriods.run();
	sortInfoExecutionPeriods(infoExecutionPeriods);
	request.setAttribute("infoExecutionPeriods", infoExecutionPeriods);
    }

    private void sortInfoExecutionPeriods(final List<InfoExecutionPeriod> infoExecutionPeriods) {
	final ComparatorChain comparatorChain = new ComparatorChain();
	comparatorChain.addComparator(new BeanComparator("infoExecutionYear.year"), true);
	comparatorChain.addComparator(new BeanComparator("semester"));
	Collections.sort(infoExecutionPeriods, comparatorChain);
    }

    private void sortInfoEnrolmentPeriods(final List<InfoEnrolmentPeriod> infoEnrolmentPeriods) {
	final ComparatorChain comparatorChain = new ComparatorChain();
	comparatorChain.addComparator(new BeanComparator("infoDegreeCurricularPlan.infoDegree.tipoCurso"));
	comparatorChain.addComparator(new BeanComparator("infoDegreeCurricularPlan.infoDegree.nome"));
	Collections.sort(infoEnrolmentPeriods, comparatorChain);
    }

    private boolean isValidObjectID(final String objectIDString) {
	return objectIDString != null && objectIDString.length() > 0 && StringUtils.isNumeric(objectIDString);
    }

    private Date getDate(String date, String time) throws ParseException {
	return DateFormatUtil.parse("yyyy/MM/ddHH:mm", date + time);
    }

}