/*
 * NOTE: This copyright does *not* cover user programs that use HQ
 * program services by normal system calls through the application
 * program interfaces provided as part of the Hyperic Plug-in Development
 * Kit or the Hyperic Client Development Kit - this is merely considered
 * normal use of the program, and does *not* fall under the heading of
 * "derived work".
 *
 * Copyright (C) [2004, 2005, 2006], Hyperic, Inc.
 * This file is part of HQ.
 *
 * HQ is free software; you can redistribute it and/or modify
 * it under the terms version 2 of the GNU General Public License as
 * published by the Free Software Foundation. This program 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 this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
 * USA.
 */
//XXX move this class to sigar
package org.hyperic.hq.plugin.system;

import java.text.SimpleDateFormat;
import java.util.Date;

import org.hyperic.sigar.SigarProxy;
import org.hyperic.sigar.SigarException;
import org.hyperic.sigar.SigarNotImplementedException;
import org.hyperic.sigar.util.PrintfFormat;

public class UptimeData {

    private long _time;
    private double _uptime;
    private double[] _loadavg;

    public UptimeData() {}

    public void populate(SigarProxy sigar) throws SigarException {
        _time = System.currentTimeMillis();
        _uptime = sigar.getUptime().getUptime();
        try {
            _loadavg = sigar.getLoadAverage();
        } catch (SigarNotImplementedException e) {
            _loadavg = null;
        }
    }

    public static UptimeData gather(SigarProxy sigar) throws SigarException {
        UptimeData data = new UptimeData();
        data.populate(sigar);
        return data;
    }

    public long getTime() {
        return _time;
    }

    public double getUptime() {
        return _uptime;
    }

    public double[] getLoadavg() {
        return _loadavg;
    }

    public String getFormattedTime() {
        return getFormattedTime(_time);
    }

    public static String getFormattedTime(long time) {
        return new SimpleDateFormat("h:mm a").format(new Date(time));
    }

    public String getFormattedUptime() {
        return getFormattedUptime(_uptime);
    }

    public static String getFormattedUptime(double uptime) {
        String retval = "";

        int days = (int)uptime / (60*60*24);
        int minutes, hours;

        if (days != 0) {
            retval += days + " " + ((days > 1) ? "days" : "day") + ", ";
        }

        minutes = (int)uptime / 60;
        hours = minutes / 60;
        hours %= 24;
        minutes %= 60;

        if (hours != 0) {
            retval += hours + ":" + minutes;
        }
        else {
            retval += minutes + " min";
        }

        return retval;
    }

    public String getFormattedLoadavg() {
        return getFormattedLoadavg(_loadavg);
    }

    public static String getFormattedLoadavg(double[] loadavg) {
        if (loadavg == null) {
            return "(load average unknown)"; //windows
        }

        final String format =
            "%.2f, %.2f, %.2f";

        Object[] avg = new Double[] {
            new Double(loadavg[0]),
            new Double(loadavg[1]),
            new Double(loadavg[2]),
        };

        return new PrintfFormat(format).sprintf(avg);
    }

    public String toString() {
        return
            getFormattedTime() + 
            "  up " + getFormattedUptime() +
            ", " + getFormattedLoadavg();
    }
}