/*
 * Created on 2005/02/18
 * 
 */
package net.sourceforge.fenixedu.presentationTier.Action.manager;

import java.text.SimpleDateFormat;
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.Filtro.exception.FenixFilterException;
import net.sourceforge.fenixedu.applicationTier.Servico.exceptions.FenixServiceException;
import net.sourceforge.fenixedu.applicationTier.Servico.manager.CreateStudentCurricularPlan;
import net.sourceforge.fenixedu.applicationTier.Servico.manager.DeleteEnrollment;
import net.sourceforge.fenixedu.applicationTier.Servico.manager.DeleteStudentCurricularPlan;
import net.sourceforge.fenixedu.applicationTier.Servico.manager.ReadDegreeCurricularPlansByDegreeType;
import net.sourceforge.fenixedu.applicationTier.Servico.manager.ReadStudentCurricularInformation;
import net.sourceforge.fenixedu.applicationTier.Servico.manager.TransferEnrollments;
import net.sourceforge.fenixedu.domain.degree.DegreeType;
import net.sourceforge.fenixedu.domain.studentCurricularPlan.StudentCurricularPlanState;
import net.sourceforge.fenixedu.presentationTier.Action.base.FenixDispatchAction;

import org.apache.commons.beanutils.BeanComparator;
import org.apache.commons.collections.comparators.ComparatorChain;
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 com.linkare.commons.metainfo.Linkare;

/**
 * @author Luis Cruz
 */
@Linkare(author = "Paulo Zenida", comments = "Minor changes to prevent violations of good practices")
public class ManageStudentCurricularPlanDA extends FenixDispatchAction {

    private static final SimpleDateFormat SIMPLE_DATE_FORMAT = new SimpleDateFormat("dd/MM/yyyy");

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

	final DynaActionForm dynaActionForm = (DynaActionForm) form;
	final String studentNumberString = dynaActionForm.getString("number");
	final String degreeTypeString = dynaActionForm.getString("degreeType");

	if (isPresent(studentNumberString) && isPresent(degreeTypeString)) {
	    final DegreeType degreeType = DegreeType.valueOf(degreeTypeString);
	    putStudentCurricularInformationInRequest(request, Integer.valueOf(studentNumberString), degreeType);
	}

	return mapping.findForward("show");
    }

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

	final String studentCurricularPlanIdString = request.getParameter("studentCurricularPlanId");
	final Integer studentCurricularPlanId = Integer.valueOf(studentCurricularPlanIdString);

	DeleteStudentCurricularPlan.run(studentCurricularPlanId);

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

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

	final String enrollmentIdString = request.getParameter("enrollmentId");
	final String studentNumberString = request.getParameter("studentNumber");
	final String degreeTypeString = request.getParameter("degreeType");
	final Integer enrollmentId = Integer.valueOf(enrollmentIdString);
	final Integer studentNumber = Integer.valueOf(studentNumberString);
	final DegreeType degreeType = DegreeType.valueOf(degreeTypeString);

	DeleteEnrollment.run(studentNumber, degreeType, enrollmentId);

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

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

	final DynaActionForm dynaActionForm = (DynaActionForm) form;
	final String degreeTypeString = (String) dynaActionForm.get("degreeType");

	if (isPresent(degreeTypeString)) {
	    // putStudentCurricularPlanStateLabelListInRequest(request);

	    final DegreeType degreeType = DegreeType.valueOf(degreeTypeString);

	    final List infoDegreeCurricularPlans = (List) ReadDegreeCurricularPlansByDegreeType.run(degreeType);

	    putDegreeCurricularPlansInRequest(request, infoDegreeCurricularPlans);
	}

	return mapping.findForward("createStudentCurricularPlan");
    }

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

	final DynaActionForm dynaActionForm = (DynaActionForm) form;
	final String studentNumberString = (String) dynaActionForm.get("number");
	final String degreeTypeString = (String) dynaActionForm.get("degreeType");
	final String studentCurricularPlanStateString = (String) dynaActionForm.get("studentCurricularPlanState");
	final String degreeCurricularPlanIdString = (String) dynaActionForm.get("degreeCurricularPlanId");
	final String startDateString = (String) dynaActionForm.get("startDate");

	if (isPresent(studentNumberString) && isPresent(degreeTypeString) && isPresent(studentCurricularPlanStateString)
		&& isPresent(degreeCurricularPlanIdString) && isPresent(startDateString)) {

	    final Integer studentNumber = Integer.valueOf(studentNumberString);
	    final DegreeType degreeType = DegreeType.valueOf(degreeTypeString);
	    final StudentCurricularPlanState studentCurricularPlanState = StudentCurricularPlanState
		    .valueOf(studentCurricularPlanStateString);
	    final Integer degreeCurricularPlanId = Integer.valueOf(degreeCurricularPlanIdString);
	    final Date startDate = SIMPLE_DATE_FORMAT.parse(startDateString);

	    CreateStudentCurricularPlan.run(studentNumber, degreeType, studentCurricularPlanState, degreeCurricularPlanId,
		    startDate);
	}

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

    public ActionForward prepareTransferEnrollments(ActionMapping mapping, ActionForm form, HttpServletRequest request,
	    HttpServletResponse response) throws Exception {
	show(mapping, form, request, response);
	return mapping.findForward("transferEnrollments");
    }

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

	final DynaActionForm dynaActionForm = (DynaActionForm) form;
	final String selectedStudentCurricularPlanIdString = (String) dynaActionForm.get("selectedStudentCurricularPlanId");
	final Integer selectedCurriculumGroupID = (Integer) dynaActionForm.get("selectedCurriculumGroupID");
	final String[] enrollmentStringIDsToTransfer = (String[]) dynaActionForm.get("enrollmentIDsToTransfer");

	if (isPresent(selectedStudentCurricularPlanIdString) && enrollmentStringIDsToTransfer != null
		&& enrollmentStringIDsToTransfer.length > 0) {

	    final Integer selectedStudentCurricularPlanId = Integer.valueOf(selectedStudentCurricularPlanIdString);
	    final Integer[] enrollmentIDsToTransfer = new Integer[enrollmentStringIDsToTransfer.length];
	    for (int i = 0; i < enrollmentStringIDsToTransfer.length; i++) {
		final String enrollmentStringIDToTransfer = enrollmentStringIDsToTransfer[i];
		enrollmentIDsToTransfer[i] = Integer.valueOf(enrollmentStringIDToTransfer);
	    }

	    TransferEnrollments.run(selectedStudentCurricularPlanId, enrollmentIDsToTransfer, selectedCurriculumGroupID);
	}

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

    protected void putStudentCurricularInformationInRequest(final HttpServletRequest request, final Integer studentNumber,
	    final DegreeType degreeType) throws FenixFilterException, FenixServiceException {
	final List infoStudentCurricularPlans = (List) ReadStudentCurricularInformation.run(studentNumber, degreeType);
	request.setAttribute("infoStudentCurricularPlans", infoStudentCurricularPlans);
    }

    protected boolean isPresent(final String string) {
	return string != null && string.length() > 0;
    }

    protected void putDegreeCurricularPlansInRequest(final HttpServletRequest request, final List infoDegreeCurricularPlans) {
	final ComparatorChain comparatorChain = new ComparatorChain();
	comparatorChain.addComparator(new BeanComparator("infoDegree.nome"));
	comparatorChain.addComparator(new BeanComparator("initialDate"));
	Collections.sort(infoDegreeCurricularPlans, comparatorChain);
	request.setAttribute("degreeCurricularPlans", infoDegreeCurricularPlans);
    }

}