/*
 * Copyright (c) 2015 Ericsson India Global Services Pvt Ltd. 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.vpnservice.interfacemgr.test;

import static org.mockito.Matchers.any;
import static org.mockito.Mockito.*;

import com.google.common.base.Optional;
import com.google.common.util.concurrent.Futures;

import java.math.BigInteger;

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.runners.MockitoJUnitRunner;
import org.opendaylight.controller.md.sal.binding.api.DataBroker;
import org.opendaylight.controller.md.sal.binding.api.DataChangeListener;
import org.opendaylight.controller.md.sal.binding.api.ReadOnlyTransaction;
import org.opendaylight.controller.md.sal.binding.api.WriteTransaction;
import org.opendaylight.controller.md.sal.common.api.data.AsyncDataBroker.DataChangeScope;
import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
import org.opendaylight.idmanager.IdManager;
import org.opendaylight.vpnservice.interfacemgr.IfmUtil;
import org.opendaylight.vpnservice.interfacemgr.renderer.ovs.confighelpers.OvsInterfaceConfigAddHelper;
import org.opendaylight.vpnservice.interfacemgr.renderer.ovs.confighelpers.OvsInterfaceConfigRemoveHelper;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.iana._if.type.rev140508.L2vlan;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.interfaces.rev140508.interfaces.Interface;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.interfaces.rev140508.interfaces.state.Interface.OperStatus;
import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.NodeConnectorId;
import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.node.NodeConnector;
import org.opendaylight.yang.gen.v1.urn.opendaylight.vpnservice.alivenessmonitor.rev150629.AlivenessMonitorService;
import org.opendaylight.yangtools.concepts.ListenerRegistration;
import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;

@RunWith(MockitoJUnitRunner.class)
public class VlanInterfaceConfigurationTest {

    @Mock
    DataBroker dataBroker;
    @Mock
    AlivenessMonitorService alivenessMonitorService;
    @Mock IdManager idManager;
    @Mock ListenerRegistration<DataChangeListener> dataChangeListenerRegistration;
    @Mock ReadOnlyTransaction mockReadTx;
    @Mock WriteTransaction mockWriteTx;

    OvsInterfaceConfigAddHelper addHelper;
    OvsInterfaceConfigRemoveHelper removeHelper;

    NodeConnectorId nodeConnectorId;
    NodeConnector nodeConnector;
    Interface vlanInterfaceEnabled;
    Interface vlanInterfaceDisabled;
    InstanceIdentifier<Interface> interfaceInstanceIdentifier;
    InstanceIdentifier<NodeConnector> nodeConnectorInstanceIdentifier;
    InstanceIdentifier<org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.interfaces.rev140508.interfaces.state.Interface> interfaceStateIdentifier;
    org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.interfaces.rev140508.interfaces.state.Interface stateInterface;

    @Before
    public void setUp() throws Exception {
        when(dataBroker.registerDataChangeListener(
                any(LogicalDatastoreType.class),
                any(InstanceIdentifier.class),
                any(DataChangeListener.class),
                any(DataChangeScope.class)))
                .thenReturn(dataChangeListenerRegistration);
        setupMocks();
    }

    @After
    public void cleanUp(){
    }

    private void setupMocks() {
        nodeConnectorId = InterfaceManagerTestUtil.buildNodeConnectorId(BigInteger.valueOf(1), 1);
        nodeConnector = InterfaceManagerTestUtil.buildNodeConnector(nodeConnectorId);
        vlanInterfaceEnabled = InterfaceManagerTestUtil.buildInterface(InterfaceManagerTestUtil.interfaceName, "Test Vlan Interface1", true, L2vlan.class, BigInteger.valueOf(1));
        vlanInterfaceDisabled = InterfaceManagerTestUtil.buildInterface(InterfaceManagerTestUtil.interfaceName, "Test Vlan Interface1", false, L2vlan.class, BigInteger.valueOf(1));
        interfaceInstanceIdentifier = IfmUtil.buildId(InterfaceManagerTestUtil.interfaceName);
        nodeConnectorInstanceIdentifier = InterfaceManagerTestUtil.getNcIdent("openflow:1", nodeConnectorId);
        interfaceStateIdentifier = IfmUtil.buildStateInterfaceId(vlanInterfaceEnabled.getName());
        stateInterface = InterfaceManagerTestUtil.buildStateInterface(InterfaceManagerTestUtil.interfaceName, nodeConnectorId);

        // Setup mocks
        when(dataBroker.newReadOnlyTransaction()).thenReturn(mockReadTx);
        when(dataBroker.newWriteOnlyTransaction()).thenReturn(mockWriteTx);
    }

    @Test
    public void testAddVlanInterfaceWhenSwitchIsNotConnected() {
        Optional<Interface> expectedInterface = Optional.of(vlanInterfaceEnabled);
        Optional<org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.interfaces.rev140508.interfaces.state.Interface> expectedStateInterface = Optional.of(stateInterface);

        doReturn(Futures.immediateCheckedFuture(expectedInterface)).when(mockReadTx).read(
                        LogicalDatastoreType.CONFIGURATION, interfaceInstanceIdentifier);
        doReturn(Futures.immediateCheckedFuture(Optional.absent())).when(mockReadTx).read(
               LogicalDatastoreType.OPERATIONAL, interfaceStateIdentifier);

        addHelper.addConfiguration(dataBroker, null, vlanInterfaceEnabled, idManager);

        //Nothing to verify, since when switch is not connected we don't do any datastore operation

    }

    @Test
    public void testAddVlanInterfaceWhenSwitchIsConnected() {
        Optional<Interface> expectedInterface = Optional.of(vlanInterfaceEnabled);
        Optional<org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.interfaces.rev140508.interfaces.state.Interface> expectedStateInterface = Optional.of(stateInterface);

        doReturn(Futures.immediateCheckedFuture(expectedInterface)).when(mockReadTx).read(
                LogicalDatastoreType.CONFIGURATION, interfaceInstanceIdentifier);
        doReturn(Futures.immediateCheckedFuture(expectedStateInterface)).when(mockReadTx).read(
                LogicalDatastoreType.OPERATIONAL, interfaceStateIdentifier);

        addHelper.addConfiguration(dataBroker, null, vlanInterfaceEnabled, idManager);

        //Nothing to verify, since when adminstate is enabled and switch opstate is already up,
        //we don't do any datastore operation
    }

    @Test
    public void testAddVlanInterfaceWhenAdminStateDisabled() {
        Optional<Interface> expectedInterface = Optional.of(vlanInterfaceEnabled);
        Optional<org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.interfaces.rev140508.interfaces.state.Interface> expectedStateInterface =
                Optional.of(stateInterface);

        doReturn(Futures.immediateCheckedFuture(expectedInterface)).when(mockReadTx).read(
                LogicalDatastoreType.CONFIGURATION, interfaceInstanceIdentifier);
        doReturn(Futures.immediateCheckedFuture(expectedStateInterface)).when(mockReadTx).read(
                LogicalDatastoreType.OPERATIONAL, interfaceStateIdentifier);

        org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.interfaces.rev140508.interfaces.state.InterfaceBuilder ifaceBuilder = new org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.interfaces.rev140508.interfaces.state.InterfaceBuilder();
        ifaceBuilder.setOperStatus(OperStatus.Down);
        ifaceBuilder.setKey(IfmUtil.getStateInterfaceKeyFromName(vlanInterfaceEnabled.getName()));
        stateInterface = ifaceBuilder.build();

        addHelper.addConfiguration(dataBroker, null, vlanInterfaceDisabled, idManager);

        //verification
        verify(mockWriteTx).merge(LogicalDatastoreType.OPERATIONAL, interfaceStateIdentifier, stateInterface);
    }

    @Test
    public void testDeleteVlanInterface() {
        Optional<Interface> expected = Optional.of(vlanInterfaceEnabled);
        Optional<NodeConnector> expectedNc = Optional.of(nodeConnector);
        Optional<org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.interfaces.rev140508.interfaces.state.Interface> expectedStateIf = Optional.of(stateInterface);
        doReturn(Futures.immediateCheckedFuture(expected)).when(mockReadTx).read(
                        LogicalDatastoreType.CONFIGURATION, interfaceInstanceIdentifier);
        doReturn(Futures.immediateCheckedFuture(expectedNc)).when(mockReadTx).read(
                        LogicalDatastoreType.OPERATIONAL, nodeConnectorInstanceIdentifier);
        doReturn(Futures.immediateCheckedFuture(expectedStateIf)).when(mockReadTx).read(
                        LogicalDatastoreType.OPERATIONAL, interfaceStateIdentifier);

        org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.interfaces.rev140508.interfaces.state.InterfaceBuilder ifaceBuilder = new org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.interfaces.rev140508.interfaces.state.InterfaceBuilder();
        ifaceBuilder.setOperStatus(OperStatus.Down);
        ifaceBuilder.setKey(IfmUtil.getStateInterfaceKeyFromName(vlanInterfaceEnabled.getName()));
        stateInterface = ifaceBuilder.build();

        removeHelper.removeConfiguration(dataBroker,alivenessMonitorService, vlanInterfaceEnabled, idManager, null);

        //verification
        verify(mockWriteTx).merge(LogicalDatastoreType.OPERATIONAL, interfaceStateIdentifier, stateInterface);
    }
}