/*
 * Copyright 2017 NAVER Corp.
 *
 * 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 com.navercorp.pinpoint.web.mapper.stat;

import com.navercorp.pinpoint.common.server.bo.stat.DataSourceBo;
import com.navercorp.pinpoint.web.mapper.stat.sampling.sampler.DataSourceSampler;
import com.navercorp.pinpoint.web.test.util.DataSourceTestUtils;
import com.navercorp.pinpoint.web.vo.stat.SampledDataSource;
import org.junit.Assert;
import org.junit.Test;

import java.util.List;
import java.util.Random;

/**
 * @author Taejin Koo
 */
public class DataSourceSamplerTest {

    private static final Random RANDOM = new Random(System.currentTimeMillis());
    private static final int MIN_VALUE_OF_MAX_CONNECTION_SIZE = 20;
    private static final int CREATE_TEST_OBJECT_MAX_SIZE = 10;

    private final DataSourceSampler sampler = new DataSourceSampler();

    @Test
    public void sampleDataPointsTest1() throws Exception {
        int testObjectSize = RANDOM.nextInt(CREATE_TEST_OBJECT_MAX_SIZE) + 1;
        int maxConnectionSize = RANDOM.nextInt(MIN_VALUE_OF_MAX_CONNECTION_SIZE) + MIN_VALUE_OF_MAX_CONNECTION_SIZE;
        List<DataSourceBo> dataSourceBoList = DataSourceTestUtils.createDataSourceBoList(1, testObjectSize, maxConnectionSize);

        SampledDataSource sampledDataSource = sampler.sampleDataPoints(0, System.currentTimeMillis(), dataSourceBoList, null);

        assertEquals(sampledDataSource, dataSourceBoList);
    }

    private void assertEquals(SampledDataSource sampledDataSource, List<DataSourceBo> dataSourceBoList) {
        int minActiveConnectionSize = Integer.MAX_VALUE;
        int maxActiveConnectionSize = Integer.MIN_VALUE;
        int sumActiveConnectionSize = 0;

        int minMaxConnectionSize = Integer.MAX_VALUE;
        int maxMaxConnectionSize = Integer.MIN_VALUE;
        int sumMaxConnectionSize = 0;

        for (DataSourceBo dataSourceBo : dataSourceBoList) {
            int activeConnectionSize = dataSourceBo.getActiveConnectionSize();
            if (activeConnectionSize < minActiveConnectionSize) {
                minActiveConnectionSize = activeConnectionSize;
            }
            if (activeConnectionSize > maxActiveConnectionSize) {
                maxActiveConnectionSize = activeConnectionSize;
            }
            sumActiveConnectionSize += activeConnectionSize;

            int maxConnectionSize = dataSourceBo.getMaxConnectionSize();
            if (maxConnectionSize < minMaxConnectionSize) {
                minMaxConnectionSize = maxConnectionSize;
            }
            if (maxConnectionSize > maxMaxConnectionSize) {
                maxMaxConnectionSize = maxConnectionSize;
            }
            sumMaxConnectionSize += maxConnectionSize;
        }

        Assert.assertTrue(sampledDataSource.getActiveConnectionSize().getMinYVal().equals(minActiveConnectionSize));
        Assert.assertTrue(sampledDataSource.getActiveConnectionSize().getMaxYVal().equals(maxActiveConnectionSize));
        Assert.assertTrue(sampledDataSource.getActiveConnectionSize().getSumYVal().equals(sumActiveConnectionSize));

        Assert.assertTrue(sampledDataSource.getMaxConnectionSize().getMinYVal().equals(minMaxConnectionSize));
        Assert.assertTrue(sampledDataSource.getMaxConnectionSize().getMaxYVal().equals(maxMaxConnectionSize));
        Assert.assertTrue(sampledDataSource.getMaxConnectionSize().getSumYVal().equals(sumMaxConnectionSize));
    }

}