
package org.apache.rocketmq.client.consumer.store;

import java.io.File;
import java.util.Collections;
import java.util.HashSet;
import java.util.Map;

import org.apache.rocketmq.client.ClientConfig;
import org.apache.rocketmq.client.impl.factory.MQClientInstance;
import org.apache.rocketmq.common.message.MessageQueue;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.mockito.Mock;
import org.mockito.junit.MockitoJUnitRunner;

import static org.assertj.core.api.Assertions.assertThat;
import static org.mockito.Mockito.when;

@RunWith(MockitoJUnitRunner.class)
public class LocalFileOffsetStoreTest {
    @Mock
    private MQClientInstance mQClientFactory;
    private String group = "FooBarGroup";
    private String topic = "FooBar";
    private String brokerName = "DefaultBrokerName";

    @Before
    public void init() {
        System.setProperty("rocketmq.client.localOffsetStoreDir", System.getProperty("java.io.tmpdir") + File.separator + ".rocketmq_offsets");
        String clientId = new ClientConfig().buildMQClientId() + "#TestNamespace" + System.currentTimeMillis();
        when(mQClientFactory.getClientId()).thenReturn(clientId);
    }

    @Test
    public void testUpdateOffset() throws Exception {
        OffsetStore offsetStore = new LocalFileOffsetStore(mQClientFactory, group);
        MessageQueue messageQueue = new MessageQueue(topic, brokerName, 1);
        offsetStore.updateOffset(messageQueue, 1024, false);

        assertThat(offsetStore.readOffset(messageQueue, ReadOffsetType.READ_FROM_MEMORY)).isEqualTo(1024);

        offsetStore.updateOffset(messageQueue, 1023, false);
        assertThat(offsetStore.readOffset(messageQueue, ReadOffsetType.READ_FROM_MEMORY)).isEqualTo(1023);

        offsetStore.updateOffset(messageQueue, 1022, true);
        assertThat(offsetStore.readOffset(messageQueue, ReadOffsetType.READ_FROM_MEMORY)).isEqualTo(1023);
    }

    @Test
    public void testReadOffset_FromStore() throws Exception {
        OffsetStore offsetStore = new LocalFileOffsetStore(mQClientFactory, group);
        MessageQueue messageQueue = new MessageQueue(topic, brokerName, 2);

        offsetStore.updateOffset(messageQueue, 1024, false);
        assertThat(offsetStore.readOffset(messageQueue, ReadOffsetType.READ_FROM_STORE)).isEqualTo(-1);

        offsetStore.persistAll(new HashSet<MessageQueue>(Collections.singletonList(messageQueue)));
        assertThat(offsetStore.readOffset(messageQueue, ReadOffsetType.READ_FROM_STORE)).isEqualTo(1024);
    }

    @Test
    public void testCloneOffset() throws Exception {
        OffsetStore offsetStore = new LocalFileOffsetStore(mQClientFactory, group);
        MessageQueue messageQueue = new MessageQueue(topic, brokerName, 3);
        offsetStore.updateOffset(messageQueue, 1024, false);
        Map<MessageQueue, Long> cloneOffsetTable = offsetStore.cloneOffsetTable(topic);

        assertThat(cloneOffsetTable.size()).isEqualTo(1);
        assertThat(cloneOffsetTable.get(messageQueue)).isEqualTo(1024);
    }
}