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

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.Filtro.exception.NotAuthorizedFilterException;
import net.sourceforge.fenixedu.applicationTier.Servico.commons.ReadCurricularCourseByID;
import net.sourceforge.fenixedu.applicationTier.Servico.exceptions.ExistingServiceException;
import net.sourceforge.fenixedu.applicationTier.Servico.exceptions.FenixServiceException;
import net.sourceforge.fenixedu.applicationTier.Servico.exceptions.NonExistingServiceException;
import net.sourceforge.fenixedu.applicationTier.Servico.exceptions.NotAuthorizedException;
import net.sourceforge.fenixedu.applicationTier.Servico.masterDegree.administrativeOffice.ReadCurricularCoursesByDegree;
import net.sourceforge.fenixedu.dataTransferObject.InfoCurricularCourse;
import net.sourceforge.fenixedu.framework.factory.ServiceManagerServiceFactory;
import net.sourceforge.fenixedu.presentationTier.Action.base.FenixDispatchAction;
import net.sourceforge.fenixedu.presentationTier.Action.exceptions.ExistingActionException;
import net.sourceforge.fenixedu.presentationTier.Action.exceptions.FenixActionException;
import net.sourceforge.fenixedu.presentationTier.Action.masterDegree.coordinator.CoordinatedDegreeInfo;

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 com.linkare.commons.metainfo.Linkare;

/**
 * @author Fernanda Quitério 03/07/2003
 * 
 */
public class ChooseCurricularCourseDispatchAction extends FenixDispatchAction {

    @Override
    public ActionForward execute(ActionMapping mapping, ActionForm actionForm, HttpServletRequest request,
	    HttpServletResponse response) throws Exception {
	CoordinatedDegreeInfo.setCoordinatorContext(request);
	return super.execute(mapping, actionForm, request, response);
    }

    public ActionForward prepareChooseCurricularCourse(ActionMapping mapping, ActionForm form, HttpServletRequest request,
	    HttpServletResponse response) throws Exception {
	String executionYear = getFromRequest("executionYear", request);
	String degree = getFromRequest("degree", request);

	request.setAttribute("jspTitle", getFromRequest("jspTitle", request));
	request.setAttribute("executionYear", executionYear);
	request.setAttribute("degree", degree);

	// Get the Curricular Course List

	IUserView userView = getUserView(request);
	List curricularCourseList = null;
	try {
	    curricularCourseList = (ArrayList) ReadCurricularCoursesByDegree.run(executionYear, degree);
	} catch (NonExistingServiceException e) {
	    ActionErrors errors = new ActionErrors();
	    errors.add("nonExisting", new ActionError("message.public.notfound.curricularCourses"));
	    saveErrors(request, errors);
	    return mapping.getInputForward();

	} catch (ExistingServiceException e) {
	    throw new ExistingActionException(e);
	}
	Collections.sort(curricularCourseList, new BeanComparator("name"));
	request.setAttribute("curricularCourses", curricularCourseList);

	return mapping.findForward("PrepareSuccess");
    }

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

	String executionYear = getFromRequest("executionYear", request);
	Integer courseID = Integer.valueOf(getFromRequest("courseID", request));
	request.setAttribute("courseID", getFromRequest("courseID", request));

	// parameters necessary to write in jsp
	request.setAttribute("curricularCourse", getFromRequest("curricularCourse", request));
	request.setAttribute("executionYear", getFromRequest("executionYear", request));
	request.setAttribute("degree", getFromRequest("degree", request));
	request.setAttribute("jspTitle", getFromRequest("jspTitle", request));

	IUserView userView = getUserView(request);
	Object args[] = { userView, courseID, executionYear };

	List listEnrolmentEvaluation = null;
	try {
	    listEnrolmentEvaluation = (List) ServiceManagerServiceFactory.executeService(
		    "ReadStudentMarksListByCurricularCourse", args);
	} catch (NotAuthorizedException e) {
	    return mapping.findForward("NotAuthorized");
	} catch (NonExistingServiceException e) {
	    ActionErrors errors = new ActionErrors();
	    errors.add("nonExisting", new ActionError("error.exception.noStudents"));
	    saveErrors(request, errors);
	    return mapping.findForward("NoStudents");
	}

	if (listEnrolmentEvaluation.size() == 0) {
	    ActionErrors actionErrors = new ActionErrors();
	    actionErrors.add("StudentNotEnroled", new ActionError("error.students.Mark.NotAvailable"));
	    saveErrors(request, actionErrors);
	    return mapping.findForward("NoStudents");
	}

	return mapping.findForward("ChooseSuccess");
    }

    @Linkare(author = "Paulo Zenida", comments = "Used Integer.valueOf() instead of new Integer()")
    public ActionForward chooseCurricularCourseByID(ActionMapping mapping, ActionForm form, HttpServletRequest request,
	    HttpServletResponse response) throws Exception {

	if (request.getParameter("degreeCurricularPlanID") != null) {
	    Integer degreeCurricularPlanID = Integer.valueOf(request.getParameter("degreeCurricularPlanID"));
	    request.setAttribute("degreeCurricularPlanID", degreeCurricularPlanID);
	}
	request.setAttribute("courseID", getFromRequest("courseID", request));

	Integer courseID = Integer.valueOf(getFromRequest("courseID", request));
	IUserView userView = getUserView(request);

	List studentList = null;
	try {
	    Object args[] = { userView, courseID, null };
	    studentList = (List) ServiceManagerServiceFactory.executeService("ReadStudentListByCurricularCourse", args);
	} catch (NotAuthorizedFilterException e) {
	    return mapping.findForward("NotAuthorized");
	} catch (NonExistingServiceException e) {
	    ActionErrors errors = new ActionErrors();
	    errors.add("nonExisting", new ActionError("error.exception.noStudents"));
	    saveErrors(request, errors);
	    return mapping.findForward("NoStudents");
	}

	InfoCurricularCourse infoCurricularCourse = null;
	try {

	    infoCurricularCourse = (InfoCurricularCourse) ReadCurricularCourseByID.run(courseID);
	} catch (NonExistingServiceException e) {

	} catch (FenixServiceException e) {
	    throw new FenixActionException(e);
	}

	if (infoCurricularCourse != null) {
	    request.setAttribute("infoCurricularCourse", infoCurricularCourse);
	}

	request.setAttribute("enrolment_list", studentList);

	String value = request.getParameter("viewPhoto");
	if (value != null && value.equals("true")) {
	    request.setAttribute("viewPhoto", Boolean.TRUE);
	} else {
	    request.setAttribute("viewPhoto", Boolean.FALSE);
	}

	return mapping.findForward("ChooseSuccess");
    }

    private String getFromRequest(String parameter, HttpServletRequest request) {
	String parameterString = request.getParameter(parameter);
	if (parameterString == null) {
	    parameterString = (String) request.getAttribute(parameter);
	}
	return parameterString;
    }
}