/**
 * Copyright (c) 2009--2014 Red Hat, Inc.
 *
 * This software is licensed to you under the GNU General Public License,
 * version 2 (GPLv2). There is NO WARRANTY for this software, express or
 * implied, including the implied warranties of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE. You should have received a copy of GPLv2
 * along with this software; if not, see
 * http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
 *
 * Red Hat trademarks are not licensed under GPLv2. No permission is
 * granted to use or replicate Red Hat trademarks that are incorporated
 * in this software or its documentation.
 */
package com.redhat.rhn.frontend.action.kickstart.cobbler;

import com.redhat.rhn.common.util.DynamicComparator;
import com.redhat.rhn.common.validator.ValidatorError;
import com.redhat.rhn.common.validator.ValidatorException;
import com.redhat.rhn.domain.kickstart.cobbler.CobblerSnippet;
import com.redhat.rhn.domain.user.User;
import com.redhat.rhn.frontend.action.common.BadParameterException;
import com.redhat.rhn.frontend.struts.RequestContext;
import com.redhat.rhn.frontend.struts.RhnAction;
import com.redhat.rhn.frontend.struts.RhnHelper;
import com.redhat.rhn.frontend.struts.RhnValidationHelper;
import com.redhat.rhn.frontend.taglibs.list.ListTagHelper;
import com.redhat.rhn.manager.kickstart.cobbler.CobblerSnippetLister;

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

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

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

/**
 * CobblerSnippetListSetupAction : class to list cobbler snippets
 * @version $Rev: 1 $
 */
public class CobblerSnippetListSetupAction extends RhnAction {
    private static final String CUSTOM = "custom";
    private static final String ALL = "all";

    private static final DynamicComparator NAME_COMPARATOR =
                new DynamicComparator("name", true);
    /**
     * ${@inheritDoc}
     */
    public ActionForward execute(ActionMapping mapping, ActionForm form,
            HttpServletRequest request, HttpServletResponse response) throws Exception {

        request.setAttribute(mapping.getParameter(), Boolean.TRUE);
        RequestContext context = new RequestContext(request);
        User user = context.getCurrentUser();
        List<CobblerSnippet> result = new ArrayList<CobblerSnippet>();
        try {
            if (ALL.equals(mapping.getParameter())) {
                result = CobblerSnippetLister.getInstance().list(user);
            }
            else if (RhnHelper.DEFAULT_FORWARD.equals(mapping.getParameter())) {
                result = CobblerSnippetLister.getInstance().listDefault(user);
            }
            else if (CUSTOM.equals(mapping.getParameter())) {
                result = CobblerSnippetLister.getInstance().listCustom(user);
            }
            else {
                throw new BadParameterException("Invalid mapping parameter passed!! [" +
                                                        mapping.getParameter() + "]");
            }
        }
        catch (ValidatorException ve) {
            List<ValidatorError> errors = ve.getResult().getErrors();
            errors.add(new ValidatorError("cobbler.snippet.invalidfilename.details",
                    CobblerSnippet.getPrefixFor(user.getOrg())));
            getStrutsDelegate().saveMessages(request, errors, ve.getResult().getWarnings());
            RhnValidationHelper.setFailedValidation(request);
        }
        Collections.sort(result, NAME_COMPARATOR);
        request.setAttribute(RequestContext.PAGE_LIST, result);
        request.setAttribute(ListTagHelper.PARENT_URL, request.getRequestURI());
        return mapping.findForward(RhnHelper.DEFAULT_FORWARD);
    }

}