/**
 * Copyright (c) 2013 SUSE LLC
 *
 * 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.ssm;

import com.redhat.rhn.common.localization.LocalizationService;
import com.redhat.rhn.domain.server.Server;
import com.redhat.rhn.domain.user.User;
import com.redhat.rhn.frontend.action.kickstart.PowerManagementAction;
import com.redhat.rhn.frontend.dto.SystemOverview;
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.StrutsDelegate;
import com.redhat.rhn.frontend.taglibs.list.helper.ListHelper;
import com.redhat.rhn.frontend.taglibs.list.helper.Listable;
import com.redhat.rhn.manager.entitlement.EntitlementManager;
import com.redhat.rhn.manager.kickstart.cobbler.CobblerPowerSettingsUpdateCommand;
import com.redhat.rhn.manager.rhnset.RhnSetDecl;
import com.redhat.rhn.manager.system.SystemManager;

import org.apache.log4j.Logger;
import org.apache.struts.action.ActionErrors;
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.velocity.util.StringUtils;
import org.cobbler.XmlRpcException;

import java.util.LinkedList;
import java.util.List;
import java.util.Map;

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

/**
 * Changes power management configuration in SSM for multiple systems at once.
 * @author Silvio Moioli <smoioli@suse.de>
 */
public class PowerManagementConfigurationAction extends RhnAction implements Listable {

    /** Logger instance */
    private static Logger log = Logger.getLogger(PowerManagementConfigurationAction.class);

    /**
     * Runs this action.
     * @param mapping action mapping
     * @param formIn form submitted values
     * @param request http request object
     * @param response http response object
     * @return an action forward object
     */
    @Override
    public ActionForward execute(ActionMapping mapping, ActionForm formIn,
        HttpServletRequest request, HttpServletResponse response) {
        RequestContext context = new RequestContext(request);
        DynaActionForm form = (DynaActionForm) formIn;
        StrutsDelegate strutsDelegate = getStrutsDelegate();
        User user = context.getCurrentUser();
        ActionErrors errors = new ActionErrors();
        int successCount = 0;

        if (context.isSubmitted() && context.wasDispatched(
                "ssm.provisioning.powermanagement.configuration.update")) {
            List<SystemOverview> systemOverviews = getResult(context);
            for (SystemOverview systemOverview : systemOverviews) {
                try {
                    Server server = SystemManager.lookupByIdAndUser(systemOverview.getId(),
                        user);
                    CobblerPowerSettingsUpdateCommand command = PowerManagementAction
                        .getPowerSettingsUpdateCommandSSM(form, user, server);
                    if (command.store() == null) {
                        successCount += 1;
                    }
                }
                catch (XmlRpcException e) {
                    log.error(StringUtils.stackTrace(e));
                    log.error(StringUtils.stackTrace(e.getCause()));
                }
            }

            createSuccessMessage(request,
                "ssm.provisioning.powermanagement.configuration.saved", "" + successCount);
        }

        Map<String, String> types = PowerManagementAction.setUpPowerTypes(request,
                strutsDelegate, errors);
        PowerManagementAction.ensureAgentInstalled(request, strutsDelegate, errors);
        if (!types.isEmpty()) {
            types.put(
                LocalizationService.getInstance().getPlainText(
                    "ssm.provisioning.powermanagement.configuration.dontchange"), "");
        }

        ListHelper helper = new ListHelper(this, request);
        helper.execute();

        return strutsDelegate.forwardParams(mapping.findForward(RhnHelper.DEFAULT_FORWARD),
            request.getParameterMap());
    }

    /**
     * ${@inheritDoc}
     */
    public List<SystemOverview> getResult(RequestContext context) {
        User user = context.getCurrentUser();
        return SystemManager.entitledInSet(user, RhnSetDecl.SYSTEMS.getLabel(),
            new LinkedList<String>() {
                {
                    add(EntitlementManager.ENTERPRISE_ENTITLED);
                }
            });
    }
}