/*
 * Copyright (c) 2008-2017, Hazelcast, Inc. All Rights Reserved.
 *
 * 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.hazelcast.collection.impl.queue;

import com.hazelcast.core.HazelcastInstance;
import com.hazelcast.core.QueueStore;
import com.hazelcast.internal.diagnostics.StoreLatencyPlugin;
import com.hazelcast.test.HazelcastParallelClassRunner;
import com.hazelcast.test.HazelcastTestSupport;
import com.hazelcast.test.TestCollectionUtils;
import com.hazelcast.test.annotation.ParallelTest;
import com.hazelcast.test.annotation.QuickTest;
import org.junit.Before;
import org.junit.Test;
import org.junit.experimental.categories.Category;
import org.junit.runner.RunWith;

import java.util.Arrays;
import java.util.Collection;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;

import static com.google.common.primitives.Longs.asList;
import static org.junit.Assert.assertEquals;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.verify;
import static org.mockito.Mockito.when;

@RunWith(HazelcastParallelClassRunner.class)
@Category({QuickTest.class, ParallelTest.class})
public class LatencyTrackingQueueStoreTest extends HazelcastTestSupport {
    private static final String NAME = "somequeue";

    private HazelcastInstance hz;
    private StoreLatencyPlugin plugin;
    private QueueStore<String> delegate;
    private LatencyTrackingQueueStore<String> queueStore;

    @Before
    public void setup() {
        hz = createHazelcastInstance();
        plugin = new StoreLatencyPlugin(getNodeEngineImpl(hz));
        delegate = mock(QueueStore.class);
        queueStore = new LatencyTrackingQueueStore<String>(delegate, plugin, NAME);
    }

    @Test
    public void load() {
        Long key = 1L;
        String value = "somevalue";

        when(delegate.load(key)).thenReturn(value);

        String result = queueStore.load(key);

        assertEquals(result, value);
        assertProbeCalledOnce("load");
    }

    @Test
    public void loadAll() {
        Collection<Long> keys = Arrays.asList(1L, 2L);
        Map<Long, String> values = new HashMap<Long, String>();
        values.put(1L, "value1");
        values.put(2L, "value2");

        when(delegate.loadAll(keys)).thenReturn(values);

        Map<Long, String> result = queueStore.loadAll(keys);

        assertEquals(values, result);
        assertProbeCalledOnce("loadAll");
    }

    @Test
    public void loadAllKeys() {
        Set<Long> keys = TestCollectionUtils.setOf(1L, 2L);

        when(delegate.loadAllKeys()).thenReturn(keys);

        Set<Long> result = queueStore.loadAllKeys();

        assertEquals(keys, result);
        assertProbeCalledOnce("loadAllKeys");
    }

    @Test
    public void delete() {
        Long key = 1L;

        queueStore.delete(key);

        verify(delegate).delete(key);
        assertProbeCalledOnce("delete");
    }

    @Test
    public void deleteAll() {
        Collection<Long> keys = asList(1L, 2L);

        queueStore.deleteAll(keys);

        verify(delegate).deleteAll(keys);
        assertProbeCalledOnce("deleteAll");
    }

    @Test
    public void store() {
        Long key = 1L;
        String value = "value1";

        queueStore.store(key, value);

        verify(delegate).store(key, value);
        assertProbeCalledOnce("store");
    }

    @Test
    public void storeAll() {
        Map<Long, String> values = new HashMap<Long, String>();
        values.put(1L, "value1");
        values.put(2L, "value2");

        queueStore.storeAll(values);

        verify(delegate).storeAll(values);
        assertProbeCalledOnce("storeAll");
    }

    public void assertProbeCalledOnce(String methodName) {
        assertEquals(1, plugin.count(LatencyTrackingQueueStore.KEY, NAME, methodName));
    }
}