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

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

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

import net.sourceforge.fenixedu.applicationTier.IUserView;
import net.sourceforge.fenixedu.applicationTier.Servico.resourceAllocationManager.ApagarTurma;
import net.sourceforge.fenixedu.applicationTier.Servico.resourceAllocationManager.CriarTurma;
import net.sourceforge.fenixedu.applicationTier.Servico.resourceAllocationManager.DeleteClasses;
import net.sourceforge.fenixedu.dataTransferObject.InfoClass;
import net.sourceforge.fenixedu.dataTransferObject.InfoCurricularYear;
import net.sourceforge.fenixedu.dataTransferObject.InfoExecutionDegree;
import net.sourceforge.fenixedu.domain.ExecutionDegree;
import net.sourceforge.fenixedu.domain.SchoolClass;
import net.sourceforge.fenixedu.domain.exceptions.DomainException;
import net.sourceforge.fenixedu.domain.time.calendarStructure.AcademicInterval;
import net.sourceforge.fenixedu.presentationTier.Action.exceptions.ExistingActionException;
import net.sourceforge.fenixedu.presentationTier.Action.resourceAllocationManager.base.FenixExecutionDegreeAndCurricularYearContextDispatchAction;
import net.sourceforge.fenixedu.presentationTier.Action.resourceAllocationManager.utils.PresentationConstants;
import net.sourceforge.fenixedu.presentationTier.Action.utils.ContextUtils;

import org.apache.commons.beanutils.BeanComparator;
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;
import org.apache.struts.action.DynaActionForm;
import org.apache.struts.validator.DynaValidatorForm;

import pt.ist.fenixWebFramework.security.UserView;

/**
 * @author Luis Cruz & Sara Ribeiro
 * 
 */
public class ManageClassesDA extends FenixExecutionDegreeAndCurricularYearContextDispatchAction {

    public ActionForward listClasses(ActionMapping mapping, ActionForm form, HttpServletRequest request,
	    HttpServletResponse response) throws Exception {
	AcademicInterval academicInterval = AcademicInterval.getAcademicIntervalFromResumedString((String) request
		.getAttribute(PresentationConstants.ACADEMIC_INTERVAL));
	InfoCurricularYear infoCurricularYear = (InfoCurricularYear) request.getAttribute(PresentationConstants.CURRICULAR_YEAR);
	InfoExecutionDegree infoExecutionDegree = (InfoExecutionDegree) request
		.getAttribute(PresentationConstants.EXECUTION_DEGREE);

	final ExecutionDegree executionDegree = rootDomainObject.readExecutionDegreeByOID(infoExecutionDegree.getIdInternal());

	final Set<SchoolClass> classes;
	Integer curricularYear = infoCurricularYear.getYear();
	if (curricularYear != null) {
	    classes = executionDegree.findSchoolClassesByAcademicIntervalAndCurricularYear(academicInterval, curricularYear);
	} else {
	    classes = executionDegree.findSchoolClassesByAcademicInterval(academicInterval);
	}

	final List<InfoClass> infoClassesList = new ArrayList<InfoClass>();

	for (final SchoolClass schoolClass : classes) {
	    InfoClass infoClass = InfoClass.newInfoFromDomain(schoolClass);
	    infoClassesList.add(infoClass);
	}

	if (infoClassesList != null && !infoClassesList.isEmpty()) {
	    BeanComparator nameComparator = new BeanComparator("nome");
	    Collections.sort(infoClassesList, nameComparator);

	    request.setAttribute(PresentationConstants.CLASSES, infoClassesList);
	}
	request.setAttribute("executionDegreeD", executionDegree);

	return mapping.findForward("ShowClassList");
    }

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

	DynaValidatorForm classForm = (DynaValidatorForm) form;
	String className = (String) classForm.get("className");
	IUserView userView = UserView.getUser();

	InfoCurricularYear infoCurricularYear = (InfoCurricularYear) request.getAttribute(PresentationConstants.CURRICULAR_YEAR);
	InfoExecutionDegree infoExecutionDegree = (InfoExecutionDegree) request
		.getAttribute(PresentationConstants.EXECUTION_DEGREE);
	AcademicInterval academicInterval = AcademicInterval.getAcademicIntervalFromResumedString((String) request
		.getAttribute(PresentationConstants.ACADEMIC_INTERVAL));

	Integer curricularYear = infoCurricularYear.getYear();

	try {
	    CriarTurma.run(className, curricularYear, infoExecutionDegree, academicInterval);

	} catch (DomainException e) {
	    throw new ExistingActionException("A SchoolClass", e);
	}

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

    /**
     * Delete class.
     */
    public ActionForward delete(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response)
	    throws Exception {

	ContextUtils.setClassContext(request);

	InfoClass infoClass = (InfoClass) request.getAttribute(PresentationConstants.CLASS_VIEW);

	IUserView userView = UserView.getUser();

	ApagarTurma.run(infoClass);

	request.removeAttribute(PresentationConstants.CLASS_VIEW);

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

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

	DynaActionForm deleteClassesForm = (DynaActionForm) form;
	String[] selectedClasses = (String[]) deleteClassesForm.get("selectedItems");

	if (selectedClasses.length == 0) {
	    ActionErrors actionErrors = new ActionErrors();
	    actionErrors.add("errors.classes.notSelected", new ActionError("errors.classes.notSelected"));
	    saveErrors(request, actionErrors);
	    return mapping.getInputForward();

	}
	List classOIDs = new ArrayList();
	for (int i = 0; i < selectedClasses.length; i++) {
	    classOIDs.add(Integer.valueOf(selectedClasses[i]));
	}

	DeleteClasses.run(classOIDs);

	return mapping.findForward("ShowShiftList");

    }

}