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

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

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

import net.sourceforge.fenixedu.dataTransferObject.InfoRoom;
import net.sourceforge.fenixedu.presentationTier.Action.resourceAllocationManager.base.FenixSelectedRoomsContextAction;
import net.sourceforge.fenixedu.presentationTier.Action.resourceAllocationManager.utils.PresentationConstants;
import net.sourceforge.fenixedu.presentationTier.Action.resourceAllocationManager.utils.Util;

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 org.apache.struts.action.DynaActionFormClass;
import org.apache.struts.config.FormBeanConfig;
import org.apache.struts.config.ModuleConfig;

/**
 * @author Nuno Antão
 * @author João Pereira
 */

public class ManipularSalasAction extends FenixSelectedRoomsContextAction {

    /**
     * Executes the selected action, depending on the pressed button. The action
     * depends on the value of the "operation" parameter. It can be prepare the
     * information about the selected sala, to show or edit it, or delete the
     * selected sala.
     */
    public ActionForward execute(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response)
	    throws Exception {

	String parameter = request.getParameter("operation");

	if (parameter.equals("Ver Sala")) {
	    return prepararVerSala(mapping, form, request, response);
	}
	if (parameter.equals("Editar Sala")) {
	    return prepararEditarSala(mapping, form, request, response);
	}

	return (mapping.findForward("Voltar"));
    }

    /**
     * Prepares the right information about the selected sala so that it can be
     * shown to the user. Places a java bean object with information about the
     * selected sala in the attribute "salaFormBean" of the request and fowards
     * to the mapping "VerSala".
     */
    public ActionForward prepararVerSala(ActionMapping mapping, ActionForm form, HttpServletRequest request,
	    HttpServletResponse response) throws Exception {

	super.execute(mapping, form, request, response);

	request.removeAttribute(mapping.getAttribute());

	DynaActionForm posicaoSalaFormBean = (DynaActionForm) form;
	Integer index = (Integer) posicaoSalaFormBean.get("index");

	request.setAttribute("selectedRoomIndex", index);
	request.setAttribute("roomId", index.toString());

	// Reset indexForm value
	DynaActionForm selectRoomIndexForm = (DynaActionForm) form;
	selectRoomIndexForm.set("index", null);

	return mapping.findForward("VerSala");
    }

    /**
     * Prepares the information about the selected sala so that it can be shown
     * to the user. Places a java bean object with information about the
     * selected sala in the attribute "salaFormBean" of the request and forwards
     * to the mapping "EditarSala".
     */
    public ActionForward prepararEditarSala(ActionMapping mapping, ActionForm form, HttpServletRequest request,
	    HttpServletResponse response) throws Exception {
	super.execute(mapping, form, request, response);

	InfoRoom salaBean = getSelectedSala(form, request);

	DynaActionForm posicaoSalaFormBean = (DynaActionForm) form;
	Integer index = (Integer) posicaoSalaFormBean.get("index");
	request.setAttribute(PresentationConstants.SELECTED_ROOM_INDEX, index);

	List edificios = Util.readExistingBuldings(null, null);
	List tipos = Util.readTypesOfRooms(null, null);

	request.setAttribute("publico.buildings", edificios);
	request.setAttribute("publico.types", tipos);

	// create the bean that holds the information about the sala to edit
	DynaActionFormClass cl;
	ModuleConfig moduleConfig = mapping.getModuleConfig();
	FormBeanConfig formBeanConfig = moduleConfig.findFormBeanConfig("roomForm");
	cl = DynaActionFormClass.createDynaActionFormClass(formBeanConfig);
	DynaActionForm criarSalaForm = (DynaActionForm) cl.newInstance();
	criarSalaForm.set("capacityNormal", String.valueOf(salaBean.getCapacidadeNormal()));
	criarSalaForm.set("capacityExame", String.valueOf(salaBean.getCapacidadeExame()));
	request.setAttribute("criarSalaForm", criarSalaForm);

	// Reset indexForm value
	DynaActionForm selectRoomIndexForm = (DynaActionForm) form;
	selectRoomIndexForm.set("index", null);

	return (mapping.findForward("EditarSala"));
    }

    /**
     * @returns the name of the selected sala.
     */
    private InfoRoom getSelectedSala(ActionForm form, HttpServletRequest request) {

	DynaActionForm posicaoSalaFormBean = (DynaActionForm) form;
	Integer salaSelecionada = (Integer) posicaoSalaFormBean.get("index");

	List listaSalasBean = (List) request.getAttribute(PresentationConstants.SELECTED_ROOMS);

	InfoRoom sala = null;
	if (listaSalasBean != null && !listaSalasBean.isEmpty()) {
	    Collections.sort(listaSalasBean);
	    sala = (InfoRoom) listaSalasBean.get(salaSelecionada.intValue());
	}

	return sala;
    }

}