/*
 * 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.protocol.bmp.impl.session;

import static org.junit.Assert.assertTrue;
import static org.mockito.Matchers.any;
import static org.mockito.Mockito.doNothing;
import static org.mockito.Mockito.timeout;
import static org.mockito.Mockito.verify;
import static org.opendaylight.protocol.util.CheckUtil.checkEquals;
import static org.opendaylight.protocol.util.CheckUtil.waitFutureSuccess;

import com.google.common.base.Optional;
import io.netty.channel.Channel;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.nio.NioEventLoopGroup;
import java.net.InetSocketAddress;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.mockito.Mock;
import org.mockito.MockitoAnnotations;
import org.opendaylight.protocol.bgp.parser.impl.BGPActivator;
import org.opendaylight.protocol.bgp.parser.spi.BGPExtensionProviderContext;
import org.opendaylight.protocol.bgp.parser.spi.pojo.SimpleBGPExtensionProviderContext;
import org.opendaylight.protocol.bmp.api.BmpDispatcher;
import org.opendaylight.protocol.bmp.api.BmpSession;
import org.opendaylight.protocol.bmp.api.BmpSessionListenerFactory;
import org.opendaylight.protocol.bmp.impl.BmpDispatcherImpl;
import org.opendaylight.protocol.bmp.parser.BmpActivator;
import org.opendaylight.protocol.bmp.spi.registry.BmpMessageRegistry;
import org.opendaylight.protocol.bmp.spi.registry.SimpleBmpExtensionProviderContext;

public class BmpDispatcherImplTest {

    private static final int PORT = 45678;
    private static final InetSocketAddress CLIENT_REMOTE = new InetSocketAddress("127.0.0.10", PORT);
    private static final InetSocketAddress SERVER = new InetSocketAddress("0.0.0.0", PORT);

    private BmpDispatcher dispatcher;
    private BGPActivator bgpActivator;
    private BmpActivator bmpActivator;

    @Mock
    private BmpSession mockedSession;
    @Mock
    private BmpSessionListenerFactory mockedListenerFactory;

    @Before
    public void setUp() throws Exception {
        MockitoAnnotations.initMocks(this);
        doNothing().when(this.mockedSession).handlerRemoved(any(ChannelHandlerContext.class));
        doNothing().when(this.mockedSession).handlerAdded(any(ChannelHandlerContext.class));
        doNothing().when(this.mockedSession).channelRegistered(any(ChannelHandlerContext.class));
        doNothing().when(this.mockedSession).channelActive(any(ChannelHandlerContext.class));
        doNothing().when(this.mockedSession).channelInactive(any(ChannelHandlerContext.class));
        doNothing().when(this.mockedSession).channelUnregistered(any(ChannelHandlerContext.class));
        doNothing().when(this.mockedSession).channelReadComplete(any(ChannelHandlerContext.class));

        this.bgpActivator = new BGPActivator();
        final BGPExtensionProviderContext context = new SimpleBGPExtensionProviderContext();
        this.bgpActivator.start(context);
        final SimpleBmpExtensionProviderContext ctx = new SimpleBmpExtensionProviderContext();
        this.bmpActivator = new BmpActivator(context);
        this.bmpActivator.start(ctx);
        final BmpMessageRegistry messageRegistry = ctx.getBmpMessageRegistry();

        this.dispatcher = new BmpDispatcherImpl(new NioEventLoopGroup(), new NioEventLoopGroup(),
            messageRegistry, (channel, sessionListenerFactory) -> BmpDispatcherImplTest.this.mockedSession);
    }

    @After
    public void tearDown() throws Exception {
        this.bgpActivator.close();
        this.bmpActivator.close();
        this.dispatcher.close();
    }

    @Test
    public void testCreateServer() throws Exception {
        final ChannelFuture futureServer = this.dispatcher.createServer(SERVER,
            this.mockedListenerFactory, Optional.absent());
        waitFutureSuccess(futureServer);
        final Channel serverChannel = futureServer.channel();
        checkEquals(()-> assertTrue(serverChannel.isActive()));


        final ChannelFuture futureClient = this.dispatcher.createClient(CLIENT_REMOTE,
            this.mockedListenerFactory, Optional.absent());
        waitFutureSuccess(futureClient);

        final Channel clientChannel = futureClient.channel();
        checkEquals(()-> assertTrue(clientChannel.isActive()));
        verify(this.mockedSession, timeout(500).times(2)).handlerAdded(any(ChannelHandlerContext.class));
        verify(this.mockedSession, timeout(500).times(2)).channelRegistered(any(ChannelHandlerContext.class));
        verify(this.mockedSession, timeout(500).times(2)).channelActive(any(ChannelHandlerContext.class));
        waitFutureSuccess(clientChannel.close());
        waitFutureSuccess(serverChannel.close());
    }
}