/*
 * Copyright 2015 Goldman Sachs.
 *
 * 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.gs.collections.impl.jmh.map;

import java.util.HashMap;
import java.util.Map;
import java.util.Random;
import java.util.concurrent.TimeUnit;

import com.carrotsearch.hppc.Containers;
import com.carrotsearch.hppc.ObjectObjectHashMap;
import com.carrotsearch.hppc.ObjectObjectMap;
import com.gs.collections.api.map.MutableMap;
import com.gs.collections.impl.jmh.runner.AbstractJMHTestRunner;
import com.gs.collections.impl.map.mutable.UnifiedMap;
import org.apache.commons.lang.RandomStringUtils;
import org.openjdk.jmh.annotations.Benchmark;
import org.openjdk.jmh.annotations.BenchmarkMode;
import org.openjdk.jmh.annotations.Mode;
import org.openjdk.jmh.annotations.OutputTimeUnit;
import org.openjdk.jmh.annotations.Param;
import org.openjdk.jmh.annotations.Scope;
import org.openjdk.jmh.annotations.Setup;
import org.openjdk.jmh.annotations.State;
import scala.collection.mutable.HashTable;

@State(Scope.Thread)
@BenchmarkMode(Mode.Throughput)
@OutputTimeUnit(TimeUnit.SECONDS)
public class ChainMapPutTest extends AbstractJMHTestRunner
{
    private static final int RANDOM_COUNT = 9;

    @Param({"250000", "500000", "750000", "1000000", "1250000", "1500000", "1750000", "2000000", "2250000", "2500000", "2750000", "3000000",
            "3250000", "3500000", "3750000", "4000000", "4250000", "4500000", "4750000", "5000000", "5250000", "5500000", "5750000", "6000000",
            "6250000", "6500000", "6750000", "7000000", "7250000", "7500000", "7750000", "8000000", "8250000", "8500000", "8750000", "9000000",
            "9250000", "9500000", "9750000", "10000000"})
    public int size;
    @Param({"true", "false"})
    public boolean isPresized;
    @Param({"0.70f", "0.75f", "0.80f"})
    public float loadFactor;
    private String[] elements;

    @Setup
    public void setUp()
    {
        Random random = new Random(123456789012345L);

        this.elements = new String[this.size];

        for (int i = 0; i < this.size; i++)
        {
            this.elements[i] = RandomStringUtils.random(RANDOM_COUNT, 0, 0, false, true, null, random);
        }
    }

    @Benchmark
    public MutableMap<String, String> gsc()
    {
        int localSize = this.size;
        float localLoadFactor = this.loadFactor;
        String[] localElements = this.elements;
        /**
         * @see UnifiedMap#DEFAULT_INITIAL_CAPACITY
         */
        int defaultInitialCapacity = 8;

        MutableMap<String, String> gsc = this.isPresized ? UnifiedMap.newMap(localSize, localLoadFactor) : UnifiedMap.newMap(defaultInitialCapacity, localLoadFactor);

        for (int i = 0; i < localSize; i++)
        {
            gsc.put(localElements[i], "dummy");
        }
        return gsc;
    }

    @Benchmark
    public ObjectObjectMap<String, String> hppc()
    {
        int localSize = this.size;
        float localLoadFactor = this.loadFactor;
        String[] localElements = this.elements;
        int defaultInitialCapacity = Containers.DEFAULT_EXPECTED_ELEMENTS;

        ObjectObjectMap<String, String> hppc = this.isPresized ? new ObjectObjectHashMap<>(localSize, localLoadFactor) : new ObjectObjectHashMap<>(defaultInitialCapacity, localLoadFactor);

        for (int i = 0; i < localSize; i++)
        {
            hppc.put(localElements[i], "dummy");
        }
        return hppc;
    }

    @Benchmark
    public Map<String, String> jdk()
    {
        int localSize = this.size;
        float localLoadFactor = this.loadFactor;
        String[] localElements = this.elements;

        /**
         * @see HashMap#DEFAULT_INITIAL_CAPACITY
         */
        int defaultInitialCapacity = 16;

        Map<String, String> jdk = this.isPresized ? new HashMap<>(localSize, localLoadFactor) : new HashMap<>(defaultInitialCapacity, localLoadFactor);

        for (int i = 0; i < localSize; i++)
        {
            jdk.put(localElements[i], "dummy");
        }
        return jdk;
    }

    @Benchmark
    public scala.collection.mutable.HashMap<String, String> scala()
    {
        int localSize = this.size;
        if (Float.compare(this.loadFactor, 0.75f) != 0)
        {
            throw new IllegalArgumentException();
        }
        String[] localElements = this.elements;

        /**
         * @see HashTable#initialSize()
         */
        int defaultInitialSize = 16;

        scala.collection.mutable.HashMap<String, String> scala = this.isPresized ? new PresizableHashMap<>(localSize) : new PresizableHashMap<>(defaultInitialSize);

        for (int i = 0; i < localSize; i++)
        {
            scala.put(localElements[i], "dummy");
        }
        return scala;
    }
}