/*
 * Copyright 2012-2017 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.host.cpu.agent.internal;

import com.redhat.thermostat.common.Clock;
import com.redhat.thermostat.common.SystemClock;
import com.redhat.thermostat.common.portability.SysConf;
import com.redhat.thermostat.common.portability.linux.ProcDataSource;
import com.redhat.thermostat.shared.config.OS;
import com.redhat.thermostat.storage.core.WriterID;

public class CpuStatBuilderFactory {

    CpuStatBuilderFactory() {
    }

    public CpuStatBuilder build(final WriterID id) {
        return OS.IS_LINUX ? buildForLinux(id) : OS.IS_WINDOWS ? buildForWindows(id) : buildForMacOS(id);
    }

    private CpuStatBuilder buildForLinux(final WriterID id) {
        final Clock clock = new SystemClock();
        final long ticksPerSecond = SysConf.getClockTicksPerSecond();
        final ProcDataSource source = new ProcDataSource();
        return new LinuxCpuStatBuilder(clock, source, ticksPerSecond, id);
    }

    private CpuStatBuilder buildForMacOS(final WriterID id) {
        final Clock clock = new SystemClock();
        final long ticksPerSecond = SysConf.getClockTicksPerSecond();
        return new MacOsCpuStatBuilder(clock, ticksPerSecond, id);
    }

    private CpuStatBuilder buildForWindows(final WriterID id) {
        final Clock clock = new SystemClock();
        return new WindowsCpuStatBuilder(clock, id);
    }
}