/**
 *
 */
package de.intevation.gnv.action;

import java.util.Collection;

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

import org.apache.log4j.Logger;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;

import org.w3c.dom.Node;

import de.intevation.gnv.action.sessionmodel.SessionModel;
import de.intevation.gnv.action.sessionmodel.SessionModelFactory;
import de.intevation.gnv.artifactdatabase.client.ArtifactDatabaseClient;
import de.intevation.gnv.artifactdatabase.client.ArtifactDatabaseClientFactory;
import de.intevation.gnv.artifactdatabase.objects.ArtifactDescription;
import de.intevation.gnv.artifactdatabase.objects.ArtifactObject;
import de.intevation.gnv.util.XMLUtils;
import de.intevation.gnv.util.XSLTransformer;

/**
 * @author Tim Englich <tim.englich@intevation.de>
 * 
 */
public class SelectArtifactFactoryAction extends ArtifactDatabaseActionBase {
    /**
     * the logger, used to log exceptions and additonaly information
     */
    private static Logger log = Logger
            .getLogger(SelectArtifactFactoryAction.class);

    /**
     * @see de.intevation.gnv.action.ArtifactDatabaseActionBase#execute(org.apache.struts.action.ActionMapping,
     *      org.apache.struts.action.ActionForm,
     *      javax.servlet.http.HttpServletRequest,
     *      javax.servlet.http.HttpServletResponse)
     */
    @Override
    public ActionForward execute(ActionMapping mapping, ActionForm form,
                                 HttpServletRequest request,
                                 HttpServletResponse response) throws Exception {
        log.debug("SelectArtifactFactoryAction.execute");
        String selectedArtifactFactoryID = request
                .getParameter("artifactFactory");
        log.debug("Selected ArtifactFactory ==> " + selectedArtifactFactoryID);

        try {
            SessionModel sm = SessionModelFactory.getInstance()
                    .getSessionModel(request);
            Collection<ArtifactObject> artifactFactories = sm
                    .getArtifactFactories();
            // Removes the Artifactspecific Attributes from the SessionModel-
            sm.resetModel();
            if (artifactFactories == null || artifactFactories.isEmpty()) {
                new FetchArtifactFactoriesAction().execute(mapping, form,
                        request, response);

            }

            sm.selectArtifactFactory(selectedArtifactFactoryID);
            ArtifactObject af = sm.getSelectedArtifactFactory();
            ;
            ArtifactDatabaseClient adc = ArtifactDatabaseClientFactory
                                                .getInstance()
                                                .getArtifactDatabaseClient(getLocale(request));
            ArtifactObject artifact = adc.createNewArtifact(af);
            sm.setCurrentArtifact(artifact);

            ArtifactDescription artifactdescription = adc
                    .getCurrentStepDescription(af, artifact,true);

            String fisUrl = response.encodeURL(
                mapping.findForward("selectfis").getPath());

            XSLTransformer transformer = new XSLTransformer();
            transformer.addParameter("selectfis", fisUrl);

            Node dynamicUINode =  new XMLUtils().getNodeXPath(
                artifactdescription.getCurrentUI(), "art:dynamic"
            );

            if (dynamicUINode != null){
                String ui = transformer.transform(
                    dynamicUINode,
                    "UTF-8",
                    request.getRealPath("WEB-INF/config/templates/describe-ui.xsl"));
            
                request.setAttribute("ui", ui);
            }

            Node staticUINode = new XMLUtils().getNodeXPath(
                artifactdescription.getCurrentUI(), "art:static"
            );

            if (staticUINode != null) {
                String staticUI = transformer.transform(
                    staticUINode,
                    "UTF-8",
                    request.getRealPath("WEB-INF/config/templates/describe-ui-static.xsl"));
                request.setAttribute("staticui", staticUI);
            }

            // return succsess
            return super.execute(mapping, form, request, response);
        } catch (Exception e) {
            log.error(e, e);
            request.setAttribute(
                    CommunicationKeys.REQUEST_EXCEPTION_MESSAGE_ID, e
                            .getMessage());
            return super.getExceptionForward(mapping);
        }
    }

    /**
     * Constructor
     */
    public SelectArtifactFactoryAction() {
    }

}