/*
 * 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.rocketmq.client.trace;

import io.opentracing.mock.MockSpan;
import io.opentracing.mock.MockTracer;
import io.opentracing.tag.Tags;
import java.io.ByteArrayOutputStream;
import java.net.InetSocketAddress;
import java.util.Collections;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.Callable;
import java.util.concurrent.ConcurrentMap;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicReference;
import org.apache.commons.lang3.reflect.FieldUtils;
import org.apache.rocketmq.client.consumer.DefaultMQPushConsumer;
import org.apache.rocketmq.client.consumer.PullCallback;
import org.apache.rocketmq.client.consumer.PullResult;
import org.apache.rocketmq.client.consumer.PullStatus;
import org.apache.rocketmq.client.consumer.listener.ConsumeConcurrentlyContext;
import org.apache.rocketmq.client.consumer.listener.ConsumeConcurrentlyStatus;
import org.apache.rocketmq.client.consumer.listener.MessageListenerConcurrently;
import org.apache.rocketmq.client.consumer.store.OffsetStore;
import org.apache.rocketmq.client.consumer.store.ReadOffsetType;
import org.apache.rocketmq.client.exception.MQBrokerException;
import org.apache.rocketmq.client.exception.MQClientException;
import org.apache.rocketmq.client.impl.CommunicationMode;
import org.apache.rocketmq.client.impl.FindBrokerResult;
import org.apache.rocketmq.client.impl.MQClientAPIImpl;
import org.apache.rocketmq.client.impl.MQClientManager;
import org.apache.rocketmq.client.impl.consumer.ConsumeMessageConcurrentlyService;
import org.apache.rocketmq.client.impl.consumer.DefaultMQPushConsumerImpl;
import org.apache.rocketmq.client.impl.consumer.ProcessQueue;
import org.apache.rocketmq.client.impl.consumer.PullAPIWrapper;
import org.apache.rocketmq.client.impl.consumer.PullMessageService;
import org.apache.rocketmq.client.impl.consumer.PullRequest;
import org.apache.rocketmq.client.impl.consumer.PullResultExt;
import org.apache.rocketmq.client.impl.consumer.RebalancePushImpl;
import org.apache.rocketmq.client.impl.factory.MQClientInstance;
import org.apache.rocketmq.client.trace.hook.ConsumeMessageOpenTracingHookImpl;
import org.apache.rocketmq.common.message.MessageClientExt;
import org.apache.rocketmq.common.message.MessageDecoder;
import org.apache.rocketmq.common.message.MessageExt;
import org.apache.rocketmq.common.message.MessageQueue;
import org.apache.rocketmq.remoting.RPCHook;
import org.apache.rocketmq.remoting.exception.RemotingException;
import org.apache.rocketmq.remoting.protocol.header.PullMessageRequestHeader;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.mockito.Mock;
import org.mockito.Mockito;
import org.mockito.invocation.InvocationOnMock;
import org.mockito.junit.MockitoJUnitRunner;
import org.mockito.stubbing.Answer;

import static org.assertj.core.api.Assertions.assertThat;
import static org.awaitility.Awaitility.waitAtMost;
import static org.mockito.ArgumentMatchers.any;
import static org.mockito.ArgumentMatchers.anyBoolean;
import static org.mockito.ArgumentMatchers.anyLong;
import static org.mockito.ArgumentMatchers.anyString;
import static org.mockito.ArgumentMatchers.nullable;
import static org.mockito.Mockito.doReturn;
import static org.mockito.Mockito.spy;
import static org.mockito.Mockito.when;

@RunWith(MockitoJUnitRunner.class)
public class DefaultMQConsumerWithOpenTracingTest {
    private String consumerGroup;

    private String topic = "FooBar";
    private String brokerName = "BrokerA";
    private MQClientInstance mQClientFactory;

    @Mock
    private MQClientAPIImpl mQClientAPIImpl;
    private PullAPIWrapper pullAPIWrapper;
    private RebalancePushImpl rebalancePushImpl;
    private DefaultMQPushConsumer pushConsumer;
    private final MockTracer tracer = new MockTracer();

    @Before
    public void init() throws Exception {
        ConcurrentMap<String, MQClientInstance> factoryTable = (ConcurrentMap<String, MQClientInstance>) FieldUtils.readDeclaredField(MQClientManager.getInstance(), "factoryTable", true);
        for (Map.Entry<String, MQClientInstance> entry : factoryTable.entrySet()) {
            entry.getValue().shutdown();
        }
        factoryTable.clear();

        when(mQClientAPIImpl.pullMessage(anyString(), any(PullMessageRequestHeader.class),
            anyLong(), any(CommunicationMode.class), nullable(PullCallback.class)))
            .thenAnswer(new Answer<PullResult>() {
                @Override
                public PullResult answer(InvocationOnMock mock) throws Throwable {
                    PullMessageRequestHeader requestHeader = mock.getArgument(1);
                    MessageClientExt messageClientExt = new MessageClientExt();
                    messageClientExt.setTopic(topic);
                    messageClientExt.setQueueId(0);
                    messageClientExt.setMsgId("123");
                    messageClientExt.setBody(new byte[] {'a'});
                    messageClientExt.setOffsetMsgId("234");
                    messageClientExt.setBornHost(new InetSocketAddress(8080));
                    messageClientExt.setStoreHost(new InetSocketAddress(8080));
                    PullResult pullResult = createPullResult(requestHeader, PullStatus.FOUND, Collections.<MessageExt>singletonList(messageClientExt));
                    ((PullCallback) mock.getArgument(4)).onSuccess(pullResult);
                    return pullResult;
                }
            });

        consumerGroup = "FooBarGroup" + System.currentTimeMillis();
        pushConsumer = new DefaultMQPushConsumer(consumerGroup);
        pushConsumer.getDefaultMQPushConsumerImpl().registerConsumeMessageHook(
            new ConsumeMessageOpenTracingHookImpl(tracer));
        pushConsumer.setNamesrvAddr("127.0.0.1:9876");
        pushConsumer.setPullInterval(60 * 1000);

        OffsetStore offsetStore = Mockito.mock(OffsetStore.class);
        Mockito.when(offsetStore.readOffset(any(MessageQueue.class), any(ReadOffsetType.class))).thenReturn(0L);
        pushConsumer.setOffsetStore(offsetStore);

        pushConsumer.registerMessageListener(new MessageListenerConcurrently() {
            @Override
            public ConsumeConcurrentlyStatus consumeMessage(List<MessageExt> msgs,
                ConsumeConcurrentlyContext context) {
                return null;
            }
        });

        DefaultMQPushConsumerImpl pushConsumerImpl = pushConsumer.getDefaultMQPushConsumerImpl();

        // suppress updateTopicRouteInfoFromNameServer
        pushConsumer.changeInstanceNameToPID();
        mQClientFactory = MQClientManager.getInstance().getOrCreateMQClientInstance(pushConsumer, (RPCHook) FieldUtils.readDeclaredField(pushConsumerImpl, "rpcHook", true));
        FieldUtils.writeDeclaredField(mQClientFactory, "mQClientAPIImpl", mQClientAPIImpl, true);
        mQClientFactory = spy(mQClientFactory);
        factoryTable.put(pushConsumer.buildMQClientId(), mQClientFactory);
        doReturn(false).when(mQClientFactory).updateTopicRouteInfoFromNameServer(anyString());

        doReturn(new FindBrokerResult("127.0.0.1:10911", false)).when(mQClientFactory).findBrokerAddressInSubscribe(anyString(), anyLong(), anyBoolean());

        Set<MessageQueue> messageQueueSet = new HashSet<>();
        messageQueueSet.add(createPullRequest().getMessageQueue());
        pushConsumerImpl.updateTopicSubscribeInfo(topic, messageQueueSet);

        pushConsumer.subscribe(topic, "*");
        pushConsumer.start();
    }

    @After
    public void terminate() {
        pushConsumer.shutdown();
    }

    @Test
    public void testPullMessage_WithTrace_Success() throws InterruptedException, RemotingException, MQBrokerException, MQClientException {
        final CountDownLatch countDownLatch = new CountDownLatch(1);
        final AtomicReference<MessageExt> messageAtomic = new AtomicReference<>();
        pushConsumer.getDefaultMQPushConsumerImpl().setConsumeMessageService(new ConsumeMessageConcurrentlyService(pushConsumer.getDefaultMQPushConsumerImpl(), new MessageListenerConcurrently() {
            @Override
            public ConsumeConcurrentlyStatus consumeMessage(List<MessageExt> msgs,
                ConsumeConcurrentlyContext context) {
                messageAtomic.set(msgs.get(0));
                countDownLatch.countDown();
                return ConsumeConcurrentlyStatus.CONSUME_SUCCESS;
            }
        }));

        PullMessageService pullMessageService = mQClientFactory.getPullMessageService();
        pullMessageService.executePullRequestImmediately(createPullRequest());
        countDownLatch.await(30, TimeUnit.SECONDS);
        MessageExt msg = messageAtomic.get();
        assertThat(msg).isNotNull();
        assertThat(msg.getTopic()).isEqualTo(topic);
        assertThat(msg.getBody()).isEqualTo(new byte[] {'a'});

        // wait until consumeMessageAfter hook of tracer is done surely.
        waitAtMost(1, TimeUnit.SECONDS).until(new Callable() {
            @Override
            public Object call() throws Exception {
                return tracer.finishedSpans().size() == 1;
            }
        });

        MockSpan span = tracer.finishedSpans().get(0);
        assertThat(span.tags().get(Tags.MESSAGE_BUS_DESTINATION.getKey())).isEqualTo(topic);
        assertThat(span.tags().get(Tags.SPAN_KIND.getKey())).isEqualTo(Tags.SPAN_KIND_CONSUMER);
        assertThat(span.tags().get(TraceConstants.ROCKETMQ_SUCCESS)).isEqualTo(true);
    }

    private PullRequest createPullRequest() {
        PullRequest pullRequest = new PullRequest();
        pullRequest.setConsumerGroup(consumerGroup);
        pullRequest.setNextOffset(1024);

        MessageQueue messageQueue = new MessageQueue();
        messageQueue.setBrokerName(brokerName);
        messageQueue.setQueueId(0);
        messageQueue.setTopic(topic);
        pullRequest.setMessageQueue(messageQueue);
        ProcessQueue processQueue = new ProcessQueue();
        processQueue.setLocked(true);
        processQueue.setLastLockTimestamp(System.currentTimeMillis());
        pullRequest.setProcessQueue(processQueue);

        return pullRequest;
    }

    private PullResultExt createPullResult(PullMessageRequestHeader requestHeader, PullStatus pullStatus,
        List<MessageExt> messageExtList) throws Exception {
        ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
        for (MessageExt messageExt : messageExtList) {
            outputStream.write(MessageDecoder.encode(messageExt, false));
        }
        return new PullResultExt(pullStatus, requestHeader.getQueueOffset() + messageExtList.size(), 123, 2048, messageExtList, 0, outputStream.toByteArray());
    }

}
