/*
 * Copyright 2012, 2013 Red Hat, Inc.
 *
 * This file is part of Thermostat.
 *
 * Thermostat is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published
 * by the Free Software Foundation; either version 2, or (at your
 * option) any later version.
 *
 * Thermostat is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Thermostat; see the file COPYING.  If not see
 * <http://www.gnu.org/licenses/>.
 *
 * Linking this code with other modules is making a combined work
 * based on this code.  Thus, the terms and conditions of the GNU
 * General Public License cover the whole combination.
 *
 * As a special exception, the copyright holders of this code give
 * you permission to link this code with independent modules to
 * produce an executable, regardless of the license terms of these
 * independent modules, and to copy and distribute the resulting
 * executable under terms of your choice, provided that you also
 * meet, for each linked independent module, the terms and conditions
 * of the license of that module.  An independent module is a module
 * which is not derived from or based on this code.  If you modify
 * this code, you may extend this exception to your version of the
 * library, but you are not obligated to do so.  If you do not wish
 * to do so, delete this exception statement from your version.
 */

package com.redhat.thermostat.client.ui;

import java.util.concurrent.TimeUnit;

import com.redhat.thermostat.client.core.views.BasicView;
import com.redhat.thermostat.client.core.views.SummaryView;
import com.redhat.thermostat.client.core.views.SummaryViewProvider;
import com.redhat.thermostat.client.core.views.BasicView.Action;
import com.redhat.thermostat.common.ActionEvent;
import com.redhat.thermostat.common.ActionListener;
import com.redhat.thermostat.common.ApplicationService;
import com.redhat.thermostat.common.Timer;
import com.redhat.thermostat.common.Timer.SchedulingType;
import com.redhat.thermostat.common.dao.HostInfoDAO;
import com.redhat.thermostat.common.dao.VmInfoDAO;

public class SummaryController {

    private final HostInfoDAO hostsDAO;
    private final VmInfoDAO vmsDAO;

    private final SummaryView view;

    private final Timer backgroundUpdateTimer;

    public SummaryController(ApplicationService appSvc, HostInfoDAO hostInfoDao, VmInfoDAO vmInfoDao, SummaryViewProvider viewProvider) {

        this.view = viewProvider.createView();

        view.addActionListener(new ActionListener<Action>() {
            @Override
            public void actionPerformed(ActionEvent<Action> actionEvent) {
                switch (actionEvent.getActionId()) {
                    case HIDDEN:
                        stop();
                        break;
                    case VISIBLE:
                        start();
                        break;
                    default:
                        break;
                }
            }
        });

        hostsDAO = hostInfoDao;
        vmsDAO = vmInfoDao;

        backgroundUpdateTimer = appSvc.getTimerFactory().createTimer();
        backgroundUpdateTimer.setAction(new Runnable() {
            @Override
            public void run() {
                view.setTotalVms(String.valueOf(vmsDAO.getCount()));
                view.setTotalHosts(String.valueOf(hostsDAO.getCount()));
            }
        });
        backgroundUpdateTimer.setInitialDelay(0);
        backgroundUpdateTimer.setDelay(10);
        backgroundUpdateTimer.setTimeUnit(TimeUnit.SECONDS);
        backgroundUpdateTimer.setSchedulingType(SchedulingType.FIXED_RATE);
    }

    private void start() {
        backgroundUpdateTimer.start();
    }

    private void stop() {
        backgroundUpdateTimer.stop();
    }

    public BasicView getView() {
        return view;
    }

}