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

import java.io.OutputStream;

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.domain.ExecutionYear;
import net.sourceforge.fenixedu.domain.Professorship;
import net.sourceforge.fenixedu.domain.Teacher;
import net.sourceforge.fenixedu.domain.credits.AnnualTeachingCredits;
import net.sourceforge.fenixedu.domain.credits.AnnualTeachingCreditsDocument;
import net.sourceforge.fenixedu.domain.credits.util.AnnualTeachingCreditsBean;
import net.sourceforge.fenixedu.domain.credits.util.TeacherCreditsBean;
import net.sourceforge.fenixedu.domain.person.RoleType;
import net.sourceforge.fenixedu.presentationTier.Action.base.FenixDispatchAction;

import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;

import pt.ist.fenixframework.pstm.AbstractDomainObject;

public abstract class ViewTeacherCreditsDA extends FenixDispatchAction {

    public ActionForward prepareTeacherSearch(ActionMapping mapping, ActionForm form, HttpServletRequest request,
            HttpServletResponse response) throws NumberFormatException, FenixFilterException, FenixServiceException {
        request.setAttribute("teacherBean", new TeacherCreditsBean());
        return mapping.findForward("selectTeacher");
    }

    public abstract ActionForward showTeacherCredits(ActionMapping mapping, ActionForm form, HttpServletRequest request,
            HttpServletResponse response) throws NumberFormatException, FenixServiceException, Exception;

    public abstract ActionForward viewAnnualTeachingCredits(ActionMapping mapping, ActionForm form, HttpServletRequest request,
            HttpServletResponse response) throws NumberFormatException, FenixServiceException, Exception;

    protected ActionForward viewAnnualTeachingCredits(ActionMapping mapping, ActionForm form, HttpServletRequest request,
            HttpServletResponse response, RoleType roleType) throws NumberFormatException, FenixServiceException, Exception {
        Teacher teacher = AbstractDomainObject.fromExternalId((String) getFromRequest(request, "teacherOid"));
        ExecutionYear executionYear = AbstractDomainObject.fromExternalId((String) getFromRequest(request, "executionYearOid"));
        if (teacher == null) {
            Professorship professorship =
                    rootDomainObject.readProfessorshipByOID(getIntegerFromRequest(request, "professorshipID"));
            if (professorship != null) {
                teacher = professorship.getTeacher();
                executionYear = professorship.getExecutionCourse().getExecutionYear();
            }
        }
        AnnualTeachingCreditsBean annualTeachingCreditsBean = null;

        for (AnnualTeachingCredits annualTeachingCredits : teacher.getAnnualTeachingCredits()) {
            if (annualTeachingCredits.getAnnualCreditsState().getExecutionYear().equals(executionYear)) {
                if (annualTeachingCredits.isPastResume()) {
                    TeacherCreditsBean teacherBean = new TeacherCreditsBean(teacher);
                    teacherBean.preparePastTeachingCredits();
                    request.setAttribute("teacherBean", teacherBean);
                    return mapping.findForward("showPastTeacherCredits");
                } else {
                    if (annualTeachingCredits.isClosed()) {
                        AnnualTeachingCreditsDocument lastTeacherCreditsDocument =
                                annualTeachingCredits
                                        .getLastTeacherCreditsDocument(roleType == RoleType.DEPARTMENT_ADMINISTRATIVE_OFFICE ? false : true);
                        if (lastTeacherCreditsDocument != null) {
                            response.setContentType("application/pdf");
                            response.setHeader("Content-disposition",
                                    "attachment; filename=" + lastTeacherCreditsDocument.getFilename());
                            final OutputStream outputStream = response.getOutputStream();
                            outputStream.write(lastTeacherCreditsDocument.getContents());
                            outputStream.close();
                            return null;
                        }
                    }
                    annualTeachingCreditsBean = new AnnualTeachingCreditsBean(annualTeachingCredits, roleType);
                    break;
                }
            }
        }
        if (annualTeachingCreditsBean == null) {
            annualTeachingCreditsBean = new AnnualTeachingCreditsBean(executionYear, teacher, roleType);
        }
        request.setAttribute("annualTeachingCreditsBean", annualTeachingCreditsBean);
        request.setAttribute("teacherBean", new TeacherCreditsBean());
        return mapping.findForward("showAnnualTeacherCredits");
    }

    public ActionForward recalculateCredits(ActionMapping mapping, ActionForm form, HttpServletRequest request,
            HttpServletResponse response) throws NumberFormatException, FenixServiceException, Exception {
        Teacher teacher = AbstractDomainObject.fromExternalId((String) getFromRequest(request, "teacherOid"));
        ExecutionYear executionYear = AbstractDomainObject.fromExternalId((String) getFromRequest(request, "executionYearOid"));
        AnnualTeachingCredits annualTeachingCredits = AnnualTeachingCredits.readByYearAndTeacher(executionYear, teacher);
        if (annualTeachingCredits != null) {
            annualTeachingCredits.calculateCredits();
        }
        return viewAnnualTeachingCredits(mapping, form, request, response);
    }

}