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

import java.util.ArrayList;
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.Servico.resourceAllocationManager.EditarTurma;
import net.sourceforge.fenixedu.applicationTier.Servico.resourceAllocationManager.LerAulasDeTurma;
import net.sourceforge.fenixedu.applicationTier.Servico.resourceAllocationManager.ReadAvailableShiftsForClass;
import net.sourceforge.fenixedu.applicationTier.Servico.resourceAllocationManager.ReadShiftByOID;
import net.sourceforge.fenixedu.applicationTier.Servico.resourceAllocationManager.ReadShiftsByClass;
import net.sourceforge.fenixedu.applicationTier.Servico.resourceAllocationManager.RemoveShifts;
import net.sourceforge.fenixedu.applicationTier.Servico.resourceAllocationManager.RemoverTurno;
import net.sourceforge.fenixedu.dataTransferObject.InfoClass;
import net.sourceforge.fenixedu.dataTransferObject.InfoLesson;
import net.sourceforge.fenixedu.dataTransferObject.InfoShift;
import net.sourceforge.fenixedu.domain.SchoolClass;
import net.sourceforge.fenixedu.domain.exceptions.DomainException;
import net.sourceforge.fenixedu.presentationTier.Action.exceptions.ExistingActionException;
import net.sourceforge.fenixedu.presentationTier.Action.resourceAllocationManager.base.FenixClassAndExecutionDegreeAndCurricularYearContextDispatchAction;
import net.sourceforge.fenixedu.presentationTier.Action.resourceAllocationManager.utils.PresentationConstants;

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 ManageClassDA extends FenixClassAndExecutionDegreeAndCurricularYearContextDispatchAction {

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

	InfoClass infoClass = (InfoClass) request.getAttribute(PresentationConstants.CLASS_VIEW);
	final SchoolClass schoolClass = rootDomainObject.readSchoolClassByOID(infoClass.getIdInternal());
	request.setAttribute("schoolClass", schoolClass);

	// Fill out the form with the name of the class
	DynaActionForm classForm = (DynaActionForm) form;
	classForm.set("className", schoolClass.getEditablePartOfName());

	// Get list of shifts and place them in request

	List<InfoShift> infoShifts = (List<InfoShift>) ReadShiftsByClass.run(infoClass);

	if (infoShifts != null && !infoShifts.isEmpty()) {
	    Collections.sort(infoShifts, InfoShift.SHIFT_COMPARATOR_BY_TYPE_AND_ORDERED_LESSONS);
	    request.setAttribute(PresentationConstants.SHIFTS, infoShifts);
	}

	return mapping.findForward("EditClass");
    }

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

	DynaValidatorForm classForm = (DynaValidatorForm) form;

	String className = (String) classForm.get("className");

	IUserView userView = UserView.getUser();

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

	InfoClass infoClassNew = null;
	try {
	    infoClassNew = (InfoClass) EditarTurma.run(infoClassOld.getIdInternal(), className);
	} catch (DomainException e) {
	    throw new ExistingActionException("A SchoolClass", e);
	}

	request.removeAttribute(PresentationConstants.CLASS_VIEW);
	request.setAttribute(PresentationConstants.CLASS_VIEW, infoClassNew);

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

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

	IUserView userView = UserView.getUser();

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

	Integer shiftOID = Integer.valueOf(request.getParameter(PresentationConstants.SHIFT_OID));

	InfoShift infoShift = ReadShiftByOID.run(shiftOID);

	RemoverTurno.run(infoShift, infoClass);

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

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

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

	// Get list of available shifts and place them in request

	List<InfoShift> infoShifts = (List<InfoShift>) ReadAvailableShiftsForClass.run(infoClass);

	/* Sort the list of shifts */
	Collections.sort(infoShifts, InfoShift.SHIFT_COMPARATOR_BY_TYPE_AND_ORDERED_LESSONS);

	/* Place list of shifts in request */
	request.setAttribute(PresentationConstants.SHIFTS, infoShifts);

	return mapping.findForward("AddShifts");
    }

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

	IUserView userView = UserView.getUser();

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

	// Fill out the form with the name of the class
	DynaActionForm classForm = (DynaActionForm) form;
	classForm.set("className", infoClass.getNome());

	// Place list of lessons in request

	/** InfoLesson List */
	List<InfoLesson> lessonList = LerAulasDeTurma.run(infoClass);

	request.setAttribute(PresentationConstants.LESSON_LIST_ATT, lessonList);

	return mapping.findForward("ViewSchedule");
    }

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

	DynaActionForm removeShiftsForm = (DynaActionForm) form;
	String[] selectedShifts = (String[]) removeShiftsForm.get("selectedItems");

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

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

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

	RemoveShifts.run(infoClass, shiftOIDs);

	return mapping.findForward("EditClass");

    }

}