/**
 * Copyright (c) 2015 Cisco Systems, Inc. and others.  All rights reserved.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v1.0 which accompanies this distribution,
 * and is available at http://www.eclipse.org/legal/epl-v10.html
 */
package org.opendaylight.openflowplugin.impl;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNull;
import static org.mockito.Mockito.times;
import static org.mockito.Mockito.verify;
import static org.mockito.Mockito.verifyNoMoreInteractions;
import static org.mockito.Mockito.when;

import com.google.common.util.concurrent.ListenableFuture;
import io.netty.util.HashedWheelTimer;
import io.netty.util.TimerTask;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.mockito.Mock;
import org.mockito.runners.MockitoJUnitRunner;
import org.opendaylight.openflowplugin.api.openflow.connection.ConnectionContext;
import org.opendaylight.openflowplugin.api.openflow.device.DeviceContext;
import org.opendaylight.openflowplugin.api.openflow.device.DeviceManager;
import org.opendaylight.openflowplugin.api.openflow.device.DeviceState;
import org.opendaylight.openflowplugin.api.openflow.lifecycle.ServiceChangeListener;
import org.opendaylight.openflowplugin.api.openflow.statistics.StatisticsManager;
import org.opendaylight.openflowplugin.api.openflow.statistics.ofpspecific.MessageIntelligenceAgency;
import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.NodeId;
import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.FeaturesReply;
import org.opendaylight.yang.gen.v1.urn.opendaylight.role.service.rev150727.OfpRole;

import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.TimeUnit;

@RunWith(MockitoJUnitRunner.class)
public class LifecycleConductorImplTest {

    private LifecycleConductorImpl lifecycleConductor;

    @Mock
    private MessageIntelligenceAgency messageIntelligenceAgency;
    @Mock
    private ServiceChangeListener serviceChangeListener;
    @Mock
    private ConcurrentHashMap<NodeId, ServiceChangeListener> serviceChangeListeners;
    @Mock
    private DeviceContext deviceContext;
    @Mock
    private DeviceManager deviceManager;
    @Mock
    private DeviceState deviceState;
    @Mock
    private ConnectionContext connectionContext;
    @Mock
    private FeaturesReply featuresReply;
    @Mock
    private TimerTask timerTask;
    @Mock
    private TimeUnit timeUnit;
    @Mock
    private HashedWheelTimer hashedWheelTimer;
    @Mock
    private ListenableFuture<Void> listenableFuture;
    @Mock
    private StatisticsManager statisticsManager;

    private NodeId nodeId = new NodeId("openflow-junit:1");
    private OfpRole ofpRole = OfpRole.NOCHANGE;
    private long delay = 42;

    @Before
    public void setUp() {
        when(deviceManager.getDeviceContextFromNodeId(nodeId)).thenReturn(deviceContext);
        when(deviceContext.getPrimaryConnectionContext()).thenReturn(connectionContext);

        lifecycleConductor = new LifecycleConductorImpl(messageIntelligenceAgency);
        lifecycleConductor.setSafelyDeviceManager(deviceManager);
        lifecycleConductor.setSafelyStatisticsManager(statisticsManager);

        when(connectionContext.getFeatures()).thenReturn(featuresReply);
    }



    @Test
    public void addOneTimeListenerWhenServicesChangesDoneTest() {
        lifecycleConductor.addOneTimeListenerWhenServicesChangesDone(serviceChangeListener, nodeId);
        assertEquals(false,lifecycleConductor.isServiceChangeListenersEmpty());
    }


    /**
     * If serviceChangeListeners is empty NOTHING should happen
     */
    @Test
    public void notifyServiceChangeListenersTest1() {
        lifecycleConductor.notifyServiceChangeListeners(nodeId,true);
        when(serviceChangeListeners.size()).thenReturn(0);
        verify(serviceChangeListeners,times(0)).remove(nodeId);
    }

    /**
     * If serviceChangeListeners is NOT empty remove(nodeID) should be removed
     */
    @Test
    public void notifyServiceChangeListenersTest2() {
        lifecycleConductor.addOneTimeListenerWhenServicesChangesDone(serviceChangeListener, nodeId);
        assertEquals(false,lifecycleConductor.isServiceChangeListenersEmpty());
        lifecycleConductor.notifyServiceChangeListeners(nodeId,true);
        assertEquals(true,lifecycleConductor.isServiceChangeListenersEmpty());
    }


    /**
     * When success flag is set to FALSE nodeID connection should be closed
     */
    @Test
    public void roleInitializationDoneTest1() {
        lifecycleConductor.addOneTimeListenerWhenServicesChangesDone(serviceChangeListener, nodeId);
        lifecycleConductor.roleInitializationDone(nodeId,false);
        verify(deviceContext,times(1)).shutdownConnection();
    }

    /**
     * When success flag is set to TRUE LOG should be printed
     */
    @Test
    public void roleInitializationDoneTest2() {
        lifecycleConductor.addOneTimeListenerWhenServicesChangesDone(serviceChangeListener, nodeId);
        lifecycleConductor.roleInitializationDone(nodeId,true);
        verify(deviceContext,times(0)).shutdownConnection();
    }

    /**
     * When getDeviceContext returns null nothing should happen
     */
    @Test
    public void roleChangeOnDeviceTest1() {
        when(deviceManager.getDeviceContextFromNodeId(nodeId)).thenReturn(null);
        lifecycleConductor.roleChangeOnDevice(nodeId,true,ofpRole,false);
        verify(deviceContext,times(0)).shutdownConnection();
        lifecycleConductor.roleChangeOnDevice(nodeId,false,ofpRole,false);
        verify(deviceContext,times(0)).shutdownConnection();
    }

    /**
     * When success flag is set to FALSE connection should be closed
     */
    @Test
    public void roleChangeOnDeviceTest2() {
        when(deviceManager.getDeviceContextFromNodeId(nodeId)).thenReturn(deviceContext);
        lifecycleConductor.roleChangeOnDevice(nodeId,false,ofpRole,false);
        verify(deviceContext,times(1)).shutdownConnection();
    }

    /**
     * When success flag is set to TRUE and initializationPahse flag is set to TRUE starting
     * device should be skipped
     */
    @Test
    public void roleChangeOnDeviceTest3() {
        when(deviceManager.getDeviceContextFromNodeId(nodeId)).thenReturn(deviceContext);
        lifecycleConductor.roleChangeOnDevice(nodeId,true,ofpRole,true);
        verify(deviceContext,times(0)).shutdownConnection();
    }

    /**
     * When OfpRole == BECOMEMASTER setRole(OfpRole.BECOMEMASTER) should be called
     */
    @Test
    public void roleChangeOnDeviceTest4() {
        when(deviceContext.getDeviceState()).thenReturn(deviceState);
        when(deviceManager.getDeviceContextFromNodeId(nodeId)).thenReturn(deviceContext);
        when(deviceContext.onClusterRoleChange(null, OfpRole.BECOMEMASTER)).thenReturn(listenableFuture);
        lifecycleConductor.roleChangeOnDevice(nodeId,true,OfpRole.BECOMEMASTER,false);
        verify(statisticsManager).startScheduling(nodeId);
    }

    /**
     * When OfpRole != BECOMEMASTER setRole(OfpRole.ECOMESLAVE) should be called
     */
    @Test
    public void roleChangeOnDeviceTest5() {
        when(deviceContext.getDeviceState()).thenReturn(deviceState);
        when(deviceManager.getDeviceContextFromNodeId(nodeId)).thenReturn(deviceContext);
        when(deviceContext.onClusterRoleChange(null, OfpRole.BECOMESLAVE)).thenReturn(listenableFuture);
        lifecycleConductor.roleChangeOnDevice(nodeId,true,OfpRole.BECOMESLAVE,false);
        verify(statisticsManager).stopScheduling(nodeId);
    }

    /**
     * If getDeviceContext returns null nothing should happen
     */
    @Test
    public void gainVersionSafelyTest1() {
        when(deviceManager.getDeviceContextFromNodeId(nodeId)).thenReturn(null);
        assertNull(lifecycleConductor.gainVersionSafely(nodeId));
    }

    /**
     * If getDeviceContext returns deviceContext getPrimaryConnectionContext() should be called
     */
    @Test
    public void gainVersionSafelyTest2() {
        when(deviceManager.getDeviceContextFromNodeId(nodeId)).thenReturn(deviceContext);
        lifecycleConductor.gainVersionSafely(nodeId);
        verify(deviceContext,times(1)).getPrimaryConnectionContext();
    }

    /**
     * If getDeviceContext return null then null should be returned
     */
    @Test
    public void gainConnectionStateSafelyTest1() {
        when(deviceManager.getDeviceContextFromNodeId(nodeId)).thenReturn(null);
        assertNull(lifecycleConductor.gainConnectionStateSafely(nodeId));
    }

    /**
     * If getDeviceContext return deviceContext then getPrimaryConnectionContext should be called
     */
    @Test
    public void gainConnectionStateSafelyTest2() {
        when(deviceManager.getDeviceContextFromNodeId(nodeId)).thenReturn(deviceContext);
        lifecycleConductor.gainConnectionStateSafely(nodeId);
        verify(deviceContext,times(1)).getPrimaryConnectionContext();
    }

    /**
     * If getDeviceContext returns null then null should be returned
     */
    @Test
    public void reserveXidForDeviceMessageTest1() {
        when(deviceManager.getDeviceContextFromNodeId(nodeId)).thenReturn(null);
        assertNull(lifecycleConductor.reserveXidForDeviceMessage(nodeId));
    }

    /**
     * If getDeviceContext returns deviceContext reserveXidForDeviceMessage() should be called
     */
    @Test
    public void reserveXidForDeviceMessageTest2() {
        when(deviceManager.getDeviceContextFromNodeId(nodeId)).thenReturn(deviceContext);
        lifecycleConductor.reserveXidForDeviceMessage(nodeId);
        verify(deviceContext,times(1)).reserveXidForDeviceMessage();
    }

    /**
     * When succes flag is set to FALSE connection should be closed
     */
    @Test
    public void deviceStartInitializationDoneTest() {
        lifecycleConductor.deviceStartInitializationDone(nodeId, false);
        verify(deviceContext,times(1)).shutdownConnection();
    }

    /**
     * When succes flag is set to FALSE connection should be closed
     */
    @Test
    public void deviceInitializationDoneTest() {
        lifecycleConductor.deviceInitializationDone(nodeId, false);
        verify(deviceContext,times(1)).shutdownConnection();
    }
}