/*
 * Copyright (c) 2016 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.netconf.console.impl;

import static junit.framework.TestCase.assertFalse;
import static junit.framework.TestCase.assertNull;
import static junit.framework.TestCase.assertTrue;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotNull;

import com.google.common.collect.ImmutableList;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.EnumMap;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Optional;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;
import javassist.ClassPool;
import org.junit.Before;
import org.junit.Test;
import org.opendaylight.controller.cluster.databroker.ConcurrentDOMDataBroker;
import org.opendaylight.controller.md.sal.binding.api.DataBroker;
import org.opendaylight.controller.md.sal.binding.api.WriteTransaction;
import org.opendaylight.controller.md.sal.binding.impl.BindingDOMDataBrokerAdapter;
import org.opendaylight.controller.md.sal.binding.impl.BindingToNormalizedNodeCodec;
import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
import org.opendaylight.controller.md.sal.common.api.data.TransactionCommitFailedException;
import org.opendaylight.controller.md.sal.dom.store.impl.InMemoryDOMDataStoreFactory;
import org.opendaylight.controller.sal.core.api.model.SchemaService;
import org.opendaylight.controller.sal.core.spi.data.DOMStore;
import org.opendaylight.mdsal.binding.generator.impl.GeneratedClassLoadingStrategy;
import org.opendaylight.mdsal.binding.generator.impl.ModuleInfoBackedContext;
import org.opendaylight.mdsal.binding.generator.util.BindingRuntimeContext;
import org.opendaylight.mdsal.binding.generator.util.JavassistUtils;
import org.opendaylight.netconf.console.utils.NetconfConsoleConstants;
import org.opendaylight.netconf.console.utils.NetconfConsoleUtils;
import org.opendaylight.netconf.console.utils.NetconfIidFactory;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.Host;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.HostBuilder;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.PortNumber;
import org.opendaylight.yang.gen.v1.urn.opendaylight.netconf.node.topology.rev150114.NetconfNode;
import org.opendaylight.yang.gen.v1.urn.opendaylight.netconf.node.topology.rev150114.NetconfNodeBuilder;
import org.opendaylight.yang.gen.v1.urn.opendaylight.netconf.node.topology.rev150114.NetconfNodeConnectionStatus;
import org.opendaylight.yang.gen.v1.urn.opendaylight.netconf.node.topology.rev150114.netconf.node.connection.status.AvailableCapabilities;
import org.opendaylight.yang.gen.v1.urn.opendaylight.netconf.node.topology.rev150114.netconf.node.connection.status.AvailableCapabilitiesBuilder;
import org.opendaylight.yang.gen.v1.urn.opendaylight.netconf.node.topology.rev150114.netconf.node.connection.status.available.capabilities.AvailableCapability;
import org.opendaylight.yang.gen.v1.urn.opendaylight.netconf.node.topology.rev150114.netconf.node.connection.status.available.capabilities.AvailableCapabilityBuilder;
import org.opendaylight.yang.gen.v1.urn.opendaylight.netconf.node.topology.rev150114.network.topology.topology.topology.types.TopologyNetconf;
import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.NodeId;
import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.TopologyId;
import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.Topology;
import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.TopologyBuilder;
import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.TopologyKey;
import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.topology.Node;
import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.topology.NodeBuilder;
import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.topology.NodeKey;
import org.opendaylight.yangtools.binding.data.codec.gen.impl.DataObjectSerializerGenerator;
import org.opendaylight.yangtools.binding.data.codec.gen.impl.StreamWriterGenerator;
import org.opendaylight.yangtools.binding.data.codec.impl.BindingNormalizedNodeCodecRegistry;
import org.opendaylight.yangtools.concepts.ListenerRegistration;
import org.opendaylight.yangtools.util.concurrent.SpecialExecutors;
import org.opendaylight.yangtools.yang.model.api.Module;
import org.opendaylight.yangtools.yang.model.api.SchemaContext;
import org.opendaylight.yangtools.yang.model.api.SchemaContextListener;
import org.opendaylight.yangtools.yang.test.util.YangParserTestUtils;

public class NetconfCommandsImplTest {

    private static final String NODE_ID = "NodeID";
    private static final String IP = "192.168.1.1";
    private static final int PORT = 1234;
    private static final NetconfNodeConnectionStatus.ConnectionStatus CONN_STATUS =
            NetconfNodeConnectionStatus.ConnectionStatus.Connected;
    private static final String CAP_PREFIX = "prefix";

    private DataBroker dataBroker;
    private SchemaContext schemaContext;
    private NetconfCommandsImpl netconfCommands;

    @Before
    public void setUp() throws Exception {
        schemaContext = YangParserTestUtils.parseYangStreams(getYangSchemas());
        schemaContext.getModules();
        final SchemaService schemaService = createSchemaService();

        final DOMStore operStore = InMemoryDOMDataStoreFactory.create("DOM-OPER", schemaService);
        final DOMStore configStore = InMemoryDOMDataStoreFactory.create("DOM-CFG", schemaService);

        final EnumMap<LogicalDatastoreType, DOMStore> datastores = new EnumMap<>(LogicalDatastoreType.class);
        datastores.put(LogicalDatastoreType.CONFIGURATION, configStore);
        datastores.put(LogicalDatastoreType.OPERATIONAL, operStore);

        final ExecutorService listenableFutureExecutor = SpecialExecutors.newBlockingBoundedCachedThreadPool(
                16, 16, "CommitFutures");

        final ConcurrentDOMDataBroker cDOMDataBroker =
                new ConcurrentDOMDataBroker(datastores, listenableFutureExecutor);

        final ClassPool pool = ClassPool.getDefault();
        final DataObjectSerializerGenerator generator = StreamWriterGenerator.create(JavassistUtils.forClassPool(pool));
        final BindingNormalizedNodeCodecRegistry codecRegistry = new BindingNormalizedNodeCodecRegistry(generator);
        final ModuleInfoBackedContext moduleInfoBackedContext = ModuleInfoBackedContext.create();
        codecRegistry
                .onBindingRuntimeContextUpdated(BindingRuntimeContext.create(moduleInfoBackedContext, schemaContext));

        final GeneratedClassLoadingStrategy loading = GeneratedClassLoadingStrategy.getTCCLClassLoadingStrategy();
        final BindingToNormalizedNodeCodec bindingToNormalized =
                new BindingToNormalizedNodeCodec(loading, codecRegistry);
        bindingToNormalized.onGlobalContextUpdated(schemaContext);
        dataBroker = new BindingDOMDataBrokerAdapter(cDOMDataBroker, bindingToNormalized);

        netconfCommands = new NetconfCommandsImpl(dataBroker);
    }

    @Test
    public void testListDevice() throws TimeoutException, TransactionCommitFailedException {
        createTopology(LogicalDatastoreType.OPERATIONAL);

        final Map map = netconfCommands.listDevices();
        map.containsKey(NetconfConsoleConstants.NETCONF_ID);
        assertTrue(map.containsKey(NODE_ID));

        final Map mapNode = (Map) map.get(NODE_ID);
        assertBaseNodeAttributes(mapNode);
    }

    @Test
    public void testShowDevice() throws TimeoutException, TransactionCommitFailedException {
        createTopology(LogicalDatastoreType.OPERATIONAL);

        final Map mapCorrect = netconfCommands.showDevice(IP, String.valueOf(PORT));
        mapCorrect.containsKey(NetconfConsoleConstants.NETCONF_ID);
        assertTrue(mapCorrect.containsKey(NODE_ID));

        assertBaseNodeAttributesImmutableList((Map) mapCorrect.get(NODE_ID));

        final Map mapWrongPort = netconfCommands.showDevice(IP, "1");
        assertFalse(mapWrongPort.containsKey(NODE_ID));

        final Map mapWrongIP = netconfCommands.showDevice("1.1.1.1", String.valueOf(PORT));
        assertFalse(mapWrongIP.containsKey(NODE_ID));

        final Map mapId = netconfCommands.showDevice(NODE_ID);
        assertTrue(mapId.containsKey(NODE_ID));
        assertBaseNodeAttributesImmutableList((Map) mapId.get(NODE_ID));
    }

    @Test
    public void testConnectDisconnectDevice()
            throws InterruptedException, TimeoutException, TransactionCommitFailedException {
        final NetconfNode netconfNode = new NetconfNodeBuilder()
                .setPort(new PortNumber(7777)).setHost(HostBuilder.getDefaultInstance("10.10.1.1")).build();

        createTopology(LogicalDatastoreType.CONFIGURATION);
        netconfCommands.connectDevice(netconfNode, "netconf-ID");
        NetconfConsoleUtils.waitForUpdate("10.10.1.1");

        final Topology topology = NetconfConsoleUtils.read(LogicalDatastoreType.CONFIGURATION,
                NetconfIidFactory.NETCONF_TOPOLOGY_IID, dataBroker);
        final List<Node> nodes = topology.getNode();
        assertEquals(2, nodes.size());

        final Optional<Node> storedNode = nodes.stream().filter(node ->
                node.getKey().getNodeId().getValue().equals("netconf-ID")).findFirst();

        assertTrue(storedNode.isPresent());

        NetconfNode storedNetconfNode = storedNode.get().getAugmentation(NetconfNode.class);
        assertEquals(7777, storedNetconfNode.getPort().getValue().longValue());
        assertEquals("10.10.1.1", storedNetconfNode.getHost().getIpAddress().getIpv4Address().getValue());

        netconfCommands.disconnectDevice("netconf-ID");

        final Topology topologyDeleted = NetconfConsoleUtils.read(LogicalDatastoreType.CONFIGURATION,
                NetconfIidFactory.NETCONF_TOPOLOGY_IID, dataBroker);
        final List<Node> nodesDeleted = topologyDeleted.getNode();
        assertEquals(1, nodesDeleted.size());

        final Optional<Node> storedNodeDeleted = nodesDeleted.stream().filter(node ->
                node.getKey().getNodeId().getValue().equals("netconf-ID")).findFirst();

        assertFalse(storedNodeDeleted.isPresent());
    }

    @Test
    public void testUpdateDevice() throws TimeoutException, TransactionCommitFailedException {
        //We need both, read data from OPERATIONAL DS and update data in CONFIGURATIONAL DS
        createTopology(LogicalDatastoreType.OPERATIONAL);
        createTopology(LogicalDatastoreType.CONFIGURATION);

        final Map<String, String> update = new HashMap<>();
        update.put(NetconfConsoleConstants.NETCONF_IP, "7.7.7.7");
        update.put(NetconfConsoleConstants.TCP_ONLY, "true");
        update.put(NetconfConsoleConstants.SCHEMALESS, "true");

        netconfCommands.updateDevice(NODE_ID, "admin", "admin", update);
        NetconfConsoleUtils.waitForUpdate("7.7.7.7");

        final Topology topology = NetconfConsoleUtils.read(LogicalDatastoreType.CONFIGURATION,
                NetconfIidFactory.NETCONF_TOPOLOGY_IID, dataBroker);
        final List<Node> nodes = topology.getNode();
        assertEquals(1, nodes.size());

        final Optional<Node> storedNode = nodes.stream().filter(node ->
                node.getKey().getNodeId().getValue().equals(NODE_ID)).findFirst();
        assertTrue(storedNode.isPresent());

        NetconfNode storedNetconfNode = storedNode.get().getAugmentation(NetconfNode.class);
        assertEquals("7.7.7.7", storedNetconfNode.getHost().getIpAddress().getIpv4Address().getValue());
    }

    @Test
    public void testNetconfNodeFromIp() throws TimeoutException, TransactionCommitFailedException {
        final List<Node> nodesNotExist = NetconfConsoleUtils.getNetconfNodeFromIp(IP, dataBroker);
        assertNull(nodesNotExist);
        createTopology(LogicalDatastoreType.OPERATIONAL);
        final List<Node> nodes = NetconfConsoleUtils.getNetconfNodeFromIp(IP, dataBroker);
        assertNotNull(nodes);
        assertEquals(1, nodes.size());
    }

    private void createTopology(LogicalDatastoreType dataStoreType)
            throws TransactionCommitFailedException, TimeoutException {
        final List<Node> nodes = new ArrayList<>();
        final Node node = getNetconfNode(NODE_ID, IP, PORT, CONN_STATUS, CAP_PREFIX);
        nodes.add(node);

        final Topology topology = new TopologyBuilder()
                .setKey(new TopologyKey(new TopologyId(TopologyNetconf.QNAME.getLocalName())))
                .setTopologyId(new TopologyId(TopologyNetconf.QNAME.getLocalName())).setNode(nodes).build();

        final WriteTransaction writeTransaction = dataBroker.newWriteOnlyTransaction();
        writeTransaction.put(dataStoreType, NetconfIidFactory.NETCONF_TOPOLOGY_IID, topology);
        writeTransaction.submit().checkedGet(2, TimeUnit.SECONDS);
    }

    private Node getNetconfNode(String nodeIdent, String ip, int portNumber,
                                NetconfNodeConnectionStatus.ConnectionStatus cs, String notificationCapabilityPrefix) {

        final Host host = HostBuilder.getDefaultInstance(ip);
        final PortNumber port = new PortNumber(portNumber);

        final List<AvailableCapability> avCapList = new ArrayList<>();
        avCapList.add(new AvailableCapabilityBuilder()
                .setCapabilityOrigin(AvailableCapability.CapabilityOrigin.UserDefined)
                .setCapability(notificationCapabilityPrefix + "_availableCapabilityString1").build());
        final AvailableCapabilities avCaps =
                new AvailableCapabilitiesBuilder().setAvailableCapability(avCapList).build();

        final NetconfNode nn = new NetconfNodeBuilder().setConnectionStatus(cs).setHost(host).setPort(port)
                .setAvailableCapabilities(avCaps).build();
        final NodeId nodeId = new NodeId(nodeIdent);
        final NodeKey nk = new NodeKey(nodeId);
        final NodeBuilder nb = new NodeBuilder();
        nb.setKey(nk);
        nb.setNodeId(nodeId);
        nb.addAugmentation(NetconfNode.class, nn);
        return nb.build();
    }

    private void assertBaseNodeAttributes(Map mapNode) {

        assertTrue(mapNode.containsKey(NetconfConsoleConstants.NETCONF_ID));
        assertTrue(mapNode.containsKey(NetconfConsoleConstants.NETCONF_IP));
        assertTrue(mapNode.containsKey(NetconfConsoleConstants.NETCONF_PORT));
        assertTrue(mapNode.containsKey(NetconfConsoleConstants.STATUS));

        assertEquals(NODE_ID, mapNode.get(NetconfConsoleConstants.NETCONF_ID));
        assertEquals(IP, mapNode.get(NetconfConsoleConstants.NETCONF_IP));
        assertEquals(String.valueOf(PORT), mapNode.get(NetconfConsoleConstants.NETCONF_PORT));
        assertEquals(CONN_STATUS.name().toLowerCase(), mapNode.get(NetconfConsoleConstants.STATUS));
    }

    private void assertBaseNodeAttributesImmutableList(Map mapNode) {
        assertTrue(mapNode.containsKey(NetconfConsoleConstants.NETCONF_ID));
        assertTrue(mapNode.containsKey(NetconfConsoleConstants.NETCONF_IP));
        assertTrue(mapNode.containsKey(NetconfConsoleConstants.NETCONF_PORT));
        assertTrue(mapNode.containsKey(NetconfConsoleConstants.STATUS));

        assertEquals(ImmutableList.of(NODE_ID), mapNode.get(NetconfConsoleConstants.NETCONF_ID));
        assertEquals(ImmutableList.of(IP), mapNode.get(NetconfConsoleConstants.NETCONF_IP));
        assertEquals(ImmutableList.of(String.valueOf(PORT)), mapNode.get(NetconfConsoleConstants.NETCONF_PORT));
        assertEquals(ImmutableList.of(CONN_STATUS.name()), mapNode.get(NetconfConsoleConstants.STATUS));
    }

    private List<InputStream> getYangSchemas() {
        final List<String> schemaPaths = Arrays.asList("/schemas/network-topology@2013-10-21.yang",
                "/schemas/ietf-inet-types@2013-07-15.yang", "/schemas/yang-ext.yang",
                "/schemas/netconf-node-topology.yang");

        final List<InputStream> schemas = new ArrayList<>();
        for (String schemaPath : schemaPaths) {
            final InputStream resourceAsStream = getClass().getResourceAsStream(schemaPath);
            schemas.add(resourceAsStream);
        }
        return schemas;
    }

    private SchemaService createSchemaService() {
        return new SchemaService() {

            @Override
            public void addModule(Module module) {
            }

            @Override
            public void removeModule(Module module) {

            }

            @Override
            public SchemaContext getSessionContext() {
                return schemaContext;
            }

            @Override
            public SchemaContext getGlobalContext() {
                return schemaContext;
            }

            @Override
            public ListenerRegistration<SchemaContextListener> registerSchemaContextListener(
                    final SchemaContextListener listener) {
                listener.onGlobalContextUpdated(getGlobalContext());
                return new ListenerRegistration<SchemaContextListener>() {
                    @Override
                    public void close() {

                    }

                    @Override
                    public SchemaContextListener getInstance() {
                        return listener;
                    }
                };
            }
        };
    }
}