/*
 * 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.shardingsphere.elasticjob.lite.internal.schedule;

import com.google.common.collect.Lists;
import org.apache.shardingsphere.elasticjob.api.JobConfiguration;
import org.apache.shardingsphere.elasticjob.api.listener.ShardingContexts;
import org.apache.shardingsphere.elasticjob.infra.exception.DagRuntimeException;
import org.apache.shardingsphere.elasticjob.infra.exception.JobExecutionEnvironmentException;
import org.apache.shardingsphere.elasticjob.lite.api.listener.fixture.ElasticJobListenerCaller;
import org.apache.shardingsphere.elasticjob.lite.api.listener.fixture.TestElasticJobListener;
import org.apache.shardingsphere.elasticjob.lite.internal.config.ConfigurationService;
import org.apache.shardingsphere.elasticjob.lite.internal.dag.DagService;
import org.apache.shardingsphere.elasticjob.lite.internal.dag.DagStates;
import org.apache.shardingsphere.elasticjob.lite.internal.failover.FailoverService;
import org.apache.shardingsphere.elasticjob.lite.internal.sharding.ExecutionContextService;
import org.apache.shardingsphere.elasticjob.lite.internal.sharding.ExecutionService;
import org.apache.shardingsphere.elasticjob.lite.internal.sharding.ShardingService;
import org.apache.shardingsphere.elasticjob.lite.util.ReflectionUtils;
import org.apache.shardingsphere.elasticjob.tracing.JobEventBus;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.mockito.Mock;
import org.mockito.junit.MockitoJUnitRunner;

import java.util.Arrays;
import java.util.Collections;

import static org.hamcrest.CoreMatchers.is;
import static org.junit.Assert.assertThat;
import static org.junit.Assert.assertTrue;
import static org.mockito.Mockito.times;
import static org.mockito.Mockito.verify;
import static org.mockito.Mockito.when;

@RunWith(MockitoJUnitRunner.class)
public final class LiteJobFacadeTest {
    
    @Mock
    private ConfigurationService configService;
    
    @Mock
    private ShardingService shardingService;
    
    @Mock
    private ExecutionContextService executionContextService;
    
    @Mock
    private ExecutionService executionService;
    
    @Mock
    private FailoverService failoverService;
    
    @Mock
    private JobEventBus jobEventBus;
    
    @Mock
    private ElasticJobListenerCaller caller;

    @Mock
    private DagService dagService;
    
    private LiteJobFacade liteJobFacade;
    
    @Before
    public void setUp() {
        liteJobFacade = new LiteJobFacade(null, "test_job", Collections.singletonList(new TestElasticJobListener(caller)), null);
        ReflectionUtils.setFieldValue(liteJobFacade, "configService", configService);
        ReflectionUtils.setFieldValue(liteJobFacade, "shardingService", shardingService);
        ReflectionUtils.setFieldValue(liteJobFacade, "executionContextService", executionContextService);
        ReflectionUtils.setFieldValue(liteJobFacade, "executionService", executionService);
        ReflectionUtils.setFieldValue(liteJobFacade, "failoverService", failoverService);
        ReflectionUtils.setFieldValue(liteJobFacade, "jobEventBus", jobEventBus);
        ReflectionUtils.setFieldValue(liteJobFacade, "dagService", dagService);
    }
    
    @Test
    public void assertLoad() {
        JobConfiguration expected = JobConfiguration.newBuilder("test_job", 3).cron("0/1 * * * * ?").build();
        when(configService.load(true)).thenReturn(expected);
        assertThat(liteJobFacade.loadJobConfiguration(true), is(expected));
    }
    
    @Test
    public void assertCheckMaxTimeDiffSecondsTolerable() throws JobExecutionEnvironmentException {
        liteJobFacade.checkJobExecutionEnvironment();
        verify(configService).checkMaxTimeDiffSecondsTolerable();
    }
    
    @Test
    public void assertFailoverIfUnnecessary() {
        when(configService.load(true)).thenReturn(JobConfiguration.newBuilder("test_job", 3).cron("0/1 * * * * ?").failover(false).build());
        liteJobFacade.failoverIfNecessary();
        verify(failoverService, times(0)).failoverIfNecessary();
    }
    
    @Test
    public void assertFailoverIfNecessary() {
        when(configService.load(true)).thenReturn(JobConfiguration.newBuilder("test_job", 3).cron("0/1 * * * * ?").failover(true).monitorExecution(true).build());
        liteJobFacade.failoverIfNecessary();
        verify(failoverService).failoverIfNecessary();
    }
    
    @Test
    public void assertRegisterJobBegin() {
        ShardingContexts shardingContexts = new ShardingContexts("fake_task_id", "test_job", 10, "", Collections.emptyMap());
        liteJobFacade.registerJobBegin(shardingContexts);
        verify(executionService).registerJobBegin(shardingContexts);
    }
    
    @Test
    public void assertRegisterJobCompletedWhenFailoverDisabled() {
        ShardingContexts shardingContexts = new ShardingContexts("fake_task_id", "test_job", 10, "", Collections.emptyMap());
        when(configService.load(true)).thenReturn(JobConfiguration.newBuilder("test_job", 3).cron("0/1 * * * * ?").failover(false).build());
        liteJobFacade.registerJobCompleted(shardingContexts);
        verify(executionService).registerJobCompleted(shardingContexts);
        verify(failoverService, times(0)).updateFailoverComplete(shardingContexts.getShardingItemParameters().keySet());
    }
    
    @Test
    public void assertRegisterJobCompletedWhenFailoverEnabled() {
        ShardingContexts shardingContexts = new ShardingContexts("fake_task_id", "test_job", 10, "", Collections.emptyMap());
        when(configService.load(true)).thenReturn(JobConfiguration.newBuilder("test_job", 3).cron("0/1 * * * * ?").failover(true).monitorExecution(true).build());
        liteJobFacade.registerJobCompleted(shardingContexts);
        verify(executionService).registerJobCompleted(shardingContexts);
        verify(failoverService).updateFailoverComplete(shardingContexts.getShardingItemParameters().keySet());
    }
    
    @Test
    public void assertGetShardingContextWhenIsFailoverEnableAndFailover() {
        ShardingContexts shardingContexts = new ShardingContexts("fake_task_id", "test_job", 10, "", Collections.emptyMap());
        when(configService.load(true)).thenReturn(JobConfiguration.newBuilder("test_job", 3).cron("0/1 * * * * ?").failover(true).monitorExecution(true).build());
        when(failoverService.getLocalFailoverItems()).thenReturn(Collections.singletonList(1));
        when(executionContextService.getJobShardingContext(Collections.singletonList(1))).thenReturn(shardingContexts);
        assertThat(liteJobFacade.getShardingContexts(), is(shardingContexts));
        verify(shardingService, times(0)).shardingIfNecessary();
    }
    
    @Test
    public void assertGetShardingContextWhenIsFailoverEnableAndNotFailover() {
        ShardingContexts shardingContexts = new ShardingContexts("fake_task_id", "test_job", 10, "", Collections.emptyMap());
        when(configService.load(true)).thenReturn(JobConfiguration.newBuilder("test_job", 3).cron("0/1 * * * * ?").failover(true).monitorExecution(true).build());
        when(failoverService.getLocalFailoverItems()).thenReturn(Collections.emptyList());
        when(shardingService.getLocalShardingItems()).thenReturn(Lists.newArrayList(0, 1));
        when(failoverService.getLocalTakeOffItems()).thenReturn(Collections.singletonList(0));
        when(executionContextService.getJobShardingContext(Collections.singletonList(1))).thenReturn(shardingContexts);
        assertThat(liteJobFacade.getShardingContexts(), is(shardingContexts));
        verify(shardingService).shardingIfNecessary();
    }
    
    @Test
    public void assertGetShardingContextWhenIsFailoverDisable() {
        ShardingContexts shardingContexts = new ShardingContexts("fake_task_id", "test_job", 10, "", Collections.emptyMap());
        when(configService.load(true)).thenReturn(JobConfiguration.newBuilder("test_job", 3).cron("0/1 * * * * ?").failover(false).build());
        when(shardingService.getLocalShardingItems()).thenReturn(Arrays.asList(0, 1));
        when(executionContextService.getJobShardingContext(Arrays.asList(0, 1))).thenReturn(shardingContexts);
        assertThat(liteJobFacade.getShardingContexts(), is(shardingContexts));
        verify(shardingService).shardingIfNecessary();
    }
    
    @Test
    public void assertGetShardingContextWhenHasDisabledItems() {
        ShardingContexts shardingContexts = new ShardingContexts("fake_task_id", "test_job", 10, "", Collections.emptyMap());
        when(configService.load(true)).thenReturn(JobConfiguration.newBuilder("test_job", 3).cron("0/1 * * * * ?").failover(false).build());
        when(shardingService.getLocalShardingItems()).thenReturn(Lists.newArrayList(0, 1));
        when(executionService.getDisabledItems(Arrays.asList(0, 1))).thenReturn(Collections.singletonList(1));
        when(executionContextService.getJobShardingContext(Collections.singletonList(0))).thenReturn(shardingContexts);
        assertThat(liteJobFacade.getShardingContexts(), is(shardingContexts));
        verify(shardingService).shardingIfNecessary();
    }
    
    @Test
    public void assertMisfireIfRunning() {
        when(executionService.misfireIfHasRunningItems(Arrays.asList(0, 1))).thenReturn(true);
        assertThat(liteJobFacade.misfireIfRunning(Arrays.asList(0, 1)), is(true));
    }
    
    @Test
    public void assertClearMisfire() {
        liteJobFacade.clearMisfire(Arrays.asList(0, 1));
        verify(executionService).clearMisfire(Arrays.asList(0, 1));
    }
    
    @Test
    public void assertIsNeedSharding() {
        when(shardingService.isNeedSharding()).thenReturn(true);
        assertThat(liteJobFacade.isNeedSharding(), is(true));
    }
    
    @Test
    public void assertBeforeJobExecuted() {
        liteJobFacade.beforeJobExecuted(new ShardingContexts("fake_task_id", "test_job", 10, "", Collections.emptyMap()));
        verify(caller).before();
    }
    
    @Test
    public void assertAfterJobExecuted() {
        liteJobFacade.afterJobExecuted(new ShardingContexts("fake_task_id", "test_job", 10, "", Collections.emptyMap()));
        verify(caller).after();
    }
    
    @Test
    public void assertPostJobExecutionEvent() {
        liteJobFacade.postJobExecutionEvent(null);
        verify(jobEventBus).post(null);
    }

    @Test
    public void assertIsDagJob() {
        assertTrue(liteJobFacade.isDagJob());
    }

    @Test(expected = DagRuntimeException.class)
    public void assertCheckDagStates() {
        when(dagService.getDagStates()).thenReturn(DagStates.PAUSE);
        liteJobFacade.checkDagStates();
    }

    @Test
    public void assertCheckDagJobDependencies() {
        liteJobFacade.checkDagJobDependencies();
        verify(dagService, times(1)).checkJobDependenciesState();
    }
}