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/**
 * This file is part of Graylog.
 *
 * Graylog 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 3 of the License, or
 * (at your option) any later version.
 *
 * Graylog 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 Graylog.  If not, see .
 */
package org.graylog2.restclient.models;

import com.google.common.base.MoreObjects;
import com.google.common.collect.Maps;
import org.graylog2.rest.models.system.buffers.responses.BuffersUtilizationSummary;
import org.graylog2.restclient.models.api.responses.BufferSummaryResponse;
import org.graylog2.restclient.models.api.responses.BuffersResponse;

/**
 * @author Lennart Koopmann 
 */
public class BufferInfo {
    private final BufferSummaryResponse inputBuffer;
    private final BufferSummaryResponse processBuffer;
    private final BufferSummaryResponse outputBuffer;

    public BufferInfo(BuffersResponse br) {
        inputBuffer = br.buffers.get("input");
        processBuffer = br.buffers.get("process");
        outputBuffer = br.buffers.get("output");
    }

    public BufferInfo(BuffersUtilizationSummary bus) {
        inputBuffer = BufferSummaryResponse.fromSingleRingUtilization(bus.buffers().input());
        processBuffer = BufferSummaryResponse.EMPTY;
        outputBuffer = BufferSummaryResponse.fromSingleRingUtilization(bus.buffers().output());
    }

    public BufferSummaryResponse getInputBuffer() {
        return MoreObjects.firstNonNull(inputBuffer, BufferSummaryResponse.EMPTY);
    }

    public BufferSummaryResponse getProcessBuffer() {
        return MoreObjects.firstNonNull(processBuffer, BufferSummaryResponse.EMPTY);
    }

    public BufferSummaryResponse getOutputBuffer() {
        return MoreObjects.firstNonNull(outputBuffer, BufferSummaryResponse.EMPTY);
    }

    public static BufferInfo buildEmpty() {
        final BuffersResponse response = new BuffersResponse();

        response.buffers = Maps.newHashMap();

        return new BufferInfo(response);
    }
}