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

import net.sourceforge.fenixedu.applicationTier.Servico.resourceAllocationManager.DeleteCourseLoad;

import net.sourceforge.fenixedu.applicationTier.Servico.resourceAllocationManager.EditExecutionCourse;

import java.util.Collections;
import java.util.List;

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

import net.sourceforge.fenixedu.applicationTier.Filtro.exception.FenixFilterException;
import net.sourceforge.fenixedu.applicationTier.Servico.exceptions.FenixServiceException;
import net.sourceforge.fenixedu.dataTransferObject.InfoClass;
import net.sourceforge.fenixedu.dataTransferObject.InfoExecutionCourse;
import net.sourceforge.fenixedu.dataTransferObject.resourceAllocationManager.CourseLoadBean;
import net.sourceforge.fenixedu.domain.CourseLoad;
import net.sourceforge.fenixedu.domain.ExecutionCourse;
import net.sourceforge.fenixedu.domain.ShiftType;
import net.sourceforge.fenixedu.domain.exceptions.DomainException;
import net.sourceforge.fenixedu.framework.factory.ServiceManagerServiceFactory;
import net.sourceforge.fenixedu.presentationTier.Action.resourceAllocationManager.base.FenixExecutionCourseAndExecutionDegreeAndCurricularYearContextDispatchAction;
import net.sourceforge.fenixedu.presentationTier.Action.resourceAllocationManager.utils.PresentationConstants;

import org.apache.commons.beanutils.BeanComparator;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;

import pt.ist.fenixWebFramework.renderers.utils.RenderUtils;

/**
 * @author Luis Cruz & Sara Ribeiro
 * 
 */
public class ManageExecutionCourseDA extends FenixExecutionCourseAndExecutionDegreeAndCurricularYearContextDispatchAction {

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

	InfoExecutionCourse infoExecutionCourse = (InfoExecutionCourse) request
		.getAttribute(PresentationConstants.EXECUTION_COURSE);
	ExecutionCourse executionCourse = infoExecutionCourse.getExecutionCourse();
	readAndSetExecutionCourseClasses(request, executionCourse);
	request.setAttribute("courseLoadBean", new CourseLoadBean(executionCourse));
	return mapping.findForward("ManageExecutionCourse");
    }

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

	CourseLoadBean bean = (CourseLoadBean) getRenderedObject("courseLoadBeanID");
	ShiftType type = bean.getType();
	if (type != null) {
	    CourseLoad courseLoad = bean.getExecutionCourse().getCourseLoadByShiftType(type);
	    if (courseLoad != null) {
		bean.setUnitQuantity(courseLoad.getUnitQuantity());
		bean.setTotalQuantity(courseLoad.getTotalQuantity());
	    } else {
		bean.setUnitQuantity(null);
		bean.setTotalQuantity(null);
	    }
	}

	readAndSetExecutionCourseClasses(request, bean.getExecutionCourse());
	RenderUtils.invalidateViewState("courseLoadBeanID");
	request.setAttribute("courseLoadBean", bean);
	return mapping.findForward("ManageExecutionCourse");
    }

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

	CourseLoadBean bean = (CourseLoadBean) getRenderedObject("courseLoadBeanID");
	readAndSetExecutionCourseClasses(request, bean.getExecutionCourse());
	request.setAttribute("courseLoadBean", bean);
	return mapping.findForward("ManageExecutionCourse");
    }

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

	CourseLoadBean bean = (CourseLoadBean) getRenderedObject("courseLoadBeanID");
	try {
	    EditExecutionCourse.run(bean);

	} catch (DomainException e) {
	    addActionMessage(request, e.getMessage());
	    readAndSetExecutionCourseClasses(request, bean.getExecutionCourse());
	    request.setAttribute("courseLoadBean", bean);
	    return mapping.findForward("ManageExecutionCourse");
	}

	bean.setType(null);
	bean.setUnitQuantity(null);
	bean.setTotalQuantity(null);

	readAndSetExecutionCourseClasses(request, bean.getExecutionCourse());
	request.setAttribute("courseLoadBean", bean);
	return mapping.findForward("ManageExecutionCourse");
    }

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

	CourseLoad courseLoad = getCourseLoadFromParameter(request);
	ExecutionCourse executionCourse = courseLoad.getExecutionCourse();
	try {
	    DeleteCourseLoad.run(courseLoad);
	} catch (DomainException e) {
	    addActionMessage(request, e.getMessage());
	}

	readAndSetExecutionCourseClasses(request, executionCourse);
	request.setAttribute("courseLoadBean", new CourseLoadBean(executionCourse));
	return mapping.findForward("ManageExecutionCourse");
    }

    private void readAndSetExecutionCourseClasses(HttpServletRequest request, ExecutionCourse executionCourse)
	    throws FenixFilterException, FenixServiceException {

	List<InfoClass> infoClasses = (List<InfoClass>) ServiceManagerServiceFactory.executeService(
		"ReadClassesByExecutionCourse", new Object[] { executionCourse });

	if (infoClasses != null && !infoClasses.isEmpty()) {
	    Collections.sort(infoClasses, new BeanComparator("nome"));
	    request.setAttribute(PresentationConstants.LIST_INFOCLASS, infoClasses);
	}
    }

    private CourseLoad getCourseLoadFromParameter(final HttpServletRequest request) {
	final String idString = request.getParameterMap().containsKey("courseLoadID") ? request.getParameter("courseLoadID")
		: null;
	final Integer courseLoadID = idString != null ? Integer.valueOf(idString) : null;
	return rootDomainObject.readCourseLoadByOID(courseLoadID);
    }
}