/*-
 * ============LICENSE_START=======================================================
 * ONAP
 * ================================================================================
 * Copyright (C) 2020-2021 AT&T Intellectual Property. 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.
 * ============LICENSE_END=========================================================
 */

package org.onap.policy.controlloop.common.rules.test;

import static org.assertj.core.api.Assertions.assertThatCode;
import static org.assertj.core.api.Assertions.assertThatThrownBy;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertTrue;
import static org.mockito.Mockito.verify;
import static org.mockito.Mockito.when;

import java.util.List;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicReference;
import org.junit.AfterClass;
import org.junit.Before;
import org.junit.BeforeClass;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.mockito.Mock;
import org.mockito.junit.MockitoJUnitRunner;
import org.onap.policy.common.endpoints.event.comm.Topic.CommInfrastructure;
import org.onap.policy.common.endpoints.event.comm.TopicEndpoint;
import org.onap.policy.common.endpoints.event.comm.TopicEndpointManager;
import org.onap.policy.common.endpoints.event.comm.bus.NoopTopicSink;
import org.onap.policy.common.endpoints.parameters.TopicParameters;

@RunWith(MockitoJUnitRunner.class)
public class ListenerTest {
    private static final String EXPECTED_EXCEPTION = "expected exception";
    private static final String MY_TOPIC = "my-topic";
    private static final String MESSAGE = "the-message";
    private static final String MESSAGE2 = "other-message";
    private static final String MSG_SUFFIX = "s";
    private static final String DECODED_MESSAGE = MESSAGE + MSG_SUFFIX;

    @Mock
    private NoopTopicSink sink;
    @Mock
    private TopicEndpoint mgr;

    private Listener<String> listener;

    /**
     * Creates topics.
     */
    @BeforeClass
    public static void setUpBeforeClass() {
        TopicEndpointManager.getManager().shutdown();

        TopicParameters params = new TopicParameters();
        params.setTopic(MY_TOPIC);
        params.setManaged(true);
        params.setTopicCommInfrastructure("NOOP");

        TopicEndpointManager.getManager().addTopicSinks(List.of(params));
    }

    @AfterClass
    public static void tearDownAfterClass() {
        TopicEndpointManager.getManager().shutdown();
    }

    /**
     * Sets up.
     */
    @Before
    public void setUp() {
        when(mgr.getNoopTopicSink(MY_TOPIC)).thenReturn(sink);

        listener = new Listener<>(MY_TOPIC, msg -> msg + MSG_SUFFIX) {
            @Override
            protected TopicEndpoint getTopicManager() {
                return mgr;
            }
        };
    }

    @Test
    public void testListener() {
        verify(sink).register(listener);
    }

    @Test
    public void testAwait_testAwaitLongTimeUnit_testIsEmpty() {
        assertTrue(listener.isEmpty());

        listener.onTopicEvent</