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/**
 * Copyright (C) 2015 The Gravitee team (http://gravitee.io)
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *         http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package io.gravitee.node.api.monitor;

import java.io.Serializable;

/**
 * @author David BRASSELY (david.brassely at graviteesource.com)
 * @author GraviteeSource Team
 */
public class OsInfo implements Serializable {

    public long timestamp;

    public Cpu cpu = null;

    public Mem mem = null;

    public Swap swap = null;

    public static class Cpu implements Serializable {

        public short percent = -1;
        public double[] loadAverage = null;

        public short getPercent() {
            return percent;
        }

        public double[] getLoadAverage() {
            return loadAverage;
        }
    }

    public static class Mem implements Serializable {

        public long total = -1;
        public long free = -1;

        public long getTotal() {
            return total;
        }

        public long getUsed() {
            return total - free;
        }

        public short getUsedPercent() {
            return calculatePercentage(getUsed(), getTotal());
        }

        public long getFree() {
            return free;
        }

        public short getFreePercent() {
            return calculatePercentage(getFree(), getTotal());
        }
    }

    public static class Swap implements Serializable {

        public long total = -1;
        public long free = -1;
    }

    private static short calculatePercentage(long used, long max) {
        return max <= 0 ? 0 : (short) (Math.round((100d * used) / max));
    }
}