/**
 *
 */
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 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.ArtifactFactory;
import de.intevation.gnv.artifactdatabase.objects.ArtifactObject;
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();
            // L�scht die Artifactspezifischen Attribute am 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();
            ArtifactObject artifact = adc.createNewArtifact(af);
            sm.setCurrentArtifact(artifact);
            
            ArtifactDescription artifactdescription = adc.getCurrentStepDescription(af, artifact);
            
            XSLTransformer transformer = new XSLTransformer();
            String ui = transformer.transform(artifactdescription.getCurrentUI(), "UTF-8", request.getRealPath("WEB-INF/config/templates/describe-ui.xsl"));
            
            request.setAttribute("ui", ui);
            
            // 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() {
    }

}