/*
 * Copyright (c) 2010 by Intevation GmbH
 *
 * This program is free software under the LGPL (>=v2.1)
 * Read the file LGPL.txt coming with the software for details
 * or visit http://www.gnu.org/licenses/ if it does not exist.
 */

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.ArtifactObject;

/**
 * This controller is called to select a specific fis.
 *
 * @author <a href="mailto:tim.englich@intevation.de">Tim Englich</a>
 */
public class SelectArtifactFactoryAction extends DescribeUIAction {

    /**
     * the logger, used to log exceptions and additonaly information
     */
    private static Logger log = Logger
            .getLogger(SelectArtifactFactoryAction.class);

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

    @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);

            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);
        }
    }
}
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