/*
 * Copyright (c) "Neo4j"
 * Neo4j Sweden AB [http://neo4j.com]
 *
 * This file is part of Neo4j.
 *
 * Neo4j 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.
 *
 * 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, see <http://www.gnu.org/licenses/>.
 */
package org.neo4j.consistency.statistics;

import static java.lang.String.format;

import java.util.Arrays;

public class DefaultCounts implements Counts {
    private final long[][] counts;

    public DefaultCounts(int threads) {
        counts = new long[Type.values().length][threads];
    }

    private long[] counts(Type type) {
        return counts[type.ordinal()];
    }

    @Override
    public long sum(Type type) {
        long[] all = counts[type.ordinal()];
        long total = 0;
        for (long one : all) {
            total += one;
        }
        return total;
    }

    @Override
    public void incAndGet(Type type, int threadIndex) {
        counts(type)[threadIndex]++;
    }

    @Override
    public String toString() {
        StringBuilder builder = new StringBuilder("Counts:");
        for (Type type : Type.values()) {
            long sum = sum(type);
            if (sum > 0) {
                builder.append(format("%n  %d %s", sum, type.name()));
            }
        }
        return builder.toString();
    }

    @Override
    public void reset() {
        for (long[] c : counts) {
            Arrays.fill(c, 0);
        }
    }
}
