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

import java.util.ArrayList;
import java.util.List;

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

import net.sourceforge.fenixedu.dataTransferObject.alumni.AlumniSearchBean;
import net.sourceforge.fenixedu.domain.Alumni;
import net.sourceforge.fenixedu.domain.student.Registration;
import net.sourceforge.fenixedu.presentationTier.Action.base.FenixDispatchAction;

import org.apache.commons.lang.StringUtils;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;

import pt.ist.fenixWebFramework.renderers.components.state.IViewState;
import pt.ist.fenixWebFramework.renderers.utils.RenderUtils;

public class AlumniSearchDA extends FenixDispatchAction {

    public ActionForward showAlumniList(ActionMapping mapping, ActionForm actionForm, HttpServletRequest request,
	    HttpServletResponse response) throws Exception {

	AlumniSearchBean searchBean = reconstructBeanFromRequest(request);

	if (!StringUtils.isEmpty(searchBean.getName()) || searchBean.getDegreeType() != null) {

	    List<Registration> resultRegistrations = readAlumniRegistrations(searchBean);

	    if (request.getParameter("sort") != null && request.getParameter("sort").length() > 0) {
		resultRegistrations = RenderUtils.sortCollectionWithCriteria(resultRegistrations, request.getParameter("sort"));
	    } else {
		resultRegistrations = RenderUtils.sortCollectionWithCriteria(resultRegistrations, "student.person.name");
	    }

	    searchBean.setAlumni(new ArrayList<Registration>(resultRegistrations));
	    searchBean.setTotalItems(resultRegistrations.size());
	}

	request.setAttribute("searchAlumniBean", searchBean);
	return mapping.findForward("showAlumniList");
    }

    public ActionForward degreeTypePostback(ActionMapping mapping, ActionForm actionForm, HttpServletRequest request,
	    HttpServletResponse response) throws Exception {

	AlumniSearchBean searchBean = reconstructBeanFromRequest(request);
	RenderUtils.invalidateViewState();
	request.setAttribute("searchAlumniBean", searchBean);
	return mapping.findForward("showAlumniList");
    }

    protected AlumniSearchBean reconstructBeanFromRequest(HttpServletRequest request) {

	final IViewState viewState = RenderUtils.getViewState("searchAlumniBean");
	if (viewState != null) {

	    return (AlumniSearchBean) viewState.getMetaObject().getObject();

	} else if (request.getParameter("beansearch") != null && request.getParameter("beansearch").length() > 0) {
	    return AlumniSearchBean.getBeanFromParameters(request.getParameter("beansearch"));
	}

	return new AlumniSearchBean();
    }

    public ActionForward visualizeAlumni(ActionMapping mapping, ActionForm actionForm, HttpServletRequest request,
	    HttpServletResponse response) throws Exception {

	request.setAttribute("alumniData", rootDomainObject.readStudentByOID(getIntegerFromRequest(request, "studentId")));
	return mapping.findForward("viewAlumniDetails");
    }

    protected List<Registration> readAlumniRegistrations(AlumniSearchBean searchBean) {
	return Alumni.readAlumniRegistrations(searchBean);
    }
}