/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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 org.apache.fluss.metrics.util;

import org.apache.fluss.metrics.Histogram;
import org.apache.fluss.metrics.HistogramStatistics;

/** Stateless test histogram for which all methods return a static value. */
public class TestHistogram implements Histogram {
    private long count = 1;
    private int size = 3;
    private double mean = 4;
    private double stdDev = 5;
    private long max = 6;
    private long min = 7;

    @Override
    public void update(long value) {}

    @Override
    public long getCount() {
        return count;
    }

    @Override
    public HistogramStatistics getStatistics() {
        return new HistogramStatistics() {
            @Override
            public double getQuantile(double quantile) {
                return quantile;
            }

            @Override
            public long[] getValues() {
                return new long[0];
            }

            @Override
            public int size() {
                return size;
            }

            @Override
            public double getMean() {
                return mean;
            }

            @Override
            public double getStdDev() {
                return stdDev;
            }

            @Override
            public long getMax() {
                return max;
            }

            @Override
            public long getMin() {
                return min;
            }
        };
    }

    public void setSize(int size) {
        this.size = size;
    }

    public void setMean(double mean) {
        this.mean = mean;
    }

    public void setStdDev(double stdDev) {
        this.stdDev = stdDev;
    }

    public void setMax(long max) {
        this.max = max;
    }

    public void setMin(long min) {
        this.min = min;
    }

    public void setCount(long count) {
        this.count = count;
    }
}
