/*
 * Copyright (c) 2016 Huawei Technologies 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.groupbasedpolicy.renderer.faas;

import static org.mockito.Matchers.any;
import static org.mockito.Matchers.eq;
import static org.mockito.Mockito.doReturn;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.verify;
import static org.mockito.Mockito.when;

import com.google.common.util.concurrent.CheckedFuture;
import com.google.common.util.concurrent.MoreExecutors;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.concurrent.ScheduledExecutorService;
import org.junit.Before;
import org.junit.Test;
import org.mockito.ArgumentCaptor;
import org.opendaylight.controller.md.sal.binding.api.DataBroker;
import org.opendaylight.controller.md.sal.binding.api.DataObjectModification;
import org.opendaylight.controller.md.sal.binding.api.DataTreeChangeListener;
import org.opendaylight.controller.md.sal.binding.api.DataTreeIdentifier;
import org.opendaylight.controller.md.sal.binding.api.DataTreeModification;
import org.opendaylight.controller.md.sal.binding.api.WriteTransaction;
import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
import org.opendaylight.controller.md.sal.common.api.data.TransactionCommitFailedException;
import org.opendaylight.groupbasedpolicy.util.IidFactory;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.IpAddress;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.yang.types.rev130715.MacAddress;
import org.opendaylight.yang.gen.v1.urn.opendaylight.faas.faas.endpoint.rev151009.FaasEndpointContext;
import org.opendaylight.yang.gen.v1.urn.opendaylight.faas.faas.endpoint.rev151009.FaasEndpointContextBuilder;
import org.opendaylight.yang.gen.v1.urn.opendaylight.faas.logical.faas.common.rev151013.Uuid;
import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.common.rev140421.EndpointGroupId;
import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.common.rev140421.L2BridgeDomainId;
import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.common.rev140421.L3ContextId;
import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.common.rev140421.NetworkDomainId;
import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.common.rev140421.TenantId;
import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.endpoint.rev140421.endpoint.fields.L3Address;
import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.endpoint.rev140421.endpoint.fields.L3AddressBuilder;
import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.endpoint.rev140421.endpoints.Endpoint;
import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.endpoint.rev140421.endpoints.EndpointBuilder;
import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.policy.rev140421.tenants.tenant.policy.EndpointGroupBuilder;
import org.opendaylight.yangtools.concepts.ListenerRegistration;
import org.opendaylight.yangtools.yang.binding.DataObject;
import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;

public class FaasEndpointManagerListenerTest {

    private InstanceIdentifier<DataObject> endpointId;
    private MockFaasEndpointManagerListener endpointManagerListener;
    private MockFaasPolicyManager policyManager;
    private final DataBroker dataProvider = mock(DataBroker.class);

    @SuppressWarnings("unchecked")
    @Before
    public void init() {
        endpointId = mock(InstanceIdentifier.class);
        endpointId = mock(InstanceIdentifier.class);

        WriteTransaction writeTransaction = mock(WriteTransaction.class);
        when(dataProvider.newWriteOnlyTransaction()).thenReturn(writeTransaction);
        CheckedFuture<Void, TransactionCommitFailedException> checkedFuture = mock(CheckedFuture.class);
        when(writeTransaction.submit()).thenReturn(checkedFuture);
        policyManager = new MockFaasPolicyManager(dataProvider, mock(ScheduledExecutorService.class));
        endpointManagerListener = new MockFaasEndpointManagerListener(policyManager, dataProvider,
                MoreExecutors.directExecutor());

        doReturn(mock(ListenerRegistration.class)).when(dataProvider).registerDataTreeChangeListener(
                any(DataTreeIdentifier.class), any(DataTreeChangeListener.class));
    }

    @SuppressWarnings({ "unchecked", "rawtypes" })
    @Test
    public void testOnDataChangeEndpoint() {
        // prepare input test data
        Endpoint testEndpoint = makeTestEndpoint();
        policyManager.storeTestEpg(new EndpointGroupBuilder().setId(testEndpoint.getEndpointGroup()).build());
        endpointManagerListener.setExpectedEndpoint(testEndpoint);

        ArgumentCaptor<DataTreeChangeListener> dtclCaptor = ArgumentCaptor.forClass(DataTreeChangeListener.class);
        verify(dataProvider).registerDataTreeChangeListener(eq(new DataTreeIdentifier<>(
                LogicalDatastoreType.OPERATIONAL, IidFactory.endpointsIidWildcard().child(Endpoint.class))),
                dtclCaptor.capture());

        DataTreeModification<Endpoint> mockDataTreeModification = mock(DataTreeModification.class);
        DataObjectModification<Endpoint> mockModification = mock(DataObjectModification.class);
        doReturn(mockModification).when(mockDataTreeModification).getRootNode();
        doReturn(DataObjectModification.ModificationType.WRITE).when(mockModification).getModificationType();
        doReturn(testEndpoint).when(mockModification).getDataAfter();

        // invoke event -- expected data is verified in mocked classes

        dtclCaptor.getValue().onDataTreeChanged(Collections.singletonList(mockDataTreeModification));
    }

    private Endpoint makeTestEndpoint() {
        EndpointBuilder builder = new EndpointBuilder();
        builder.setL2Context(new L2BridgeDomainId("L2Context"));
        List<L3Address> l3Addrs = new ArrayList<>();
        L3AddressBuilder addb = new L3AddressBuilder();
        addb.setIpAddress(new IpAddress(new String("10.0.0.2").toCharArray()));
        addb.setL3Context(new L3ContextId("L3Context"));
        l3Addrs.add(addb.build());
        builder.setL3Address(l3Addrs);
        builder.setMacAddress(new MacAddress("00:00:00:00:35:02"));
        builder.setTenant(new TenantId("tenant"));
        builder.setEndpointGroup(new EndpointGroupId("endpointGroupId"));
        builder.setNetworkContainment(new NetworkDomainId("subnet"));
        FaasEndpointContextBuilder faasAugb = new FaasEndpointContextBuilder();
        faasAugb.setFaasPortRefId(new Uuid("165b3a20-adc7-11e5-bf7f-feff819cdc9f"));
        builder.addAugmentation(FaasEndpointContext.class, faasAugb.build());
        return builder.build();
    }
}