/*
 * Copyright 2016-present Open Networking Laboratory
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.onosproject.bgpio.types;

import static org.hamcrest.MatcherAssert.assertThat;
import static org.hamcrest.Matchers.instanceOf;
import static org.hamcrest.core.Is.is;

import org.jboss.netty.buffer.ChannelBuffer;
import org.jboss.netty.buffer.ChannelBuffers;
import org.junit.Test;
import org.onosproject.bgpio.exceptions.BgpParseException;
import org.onosproject.bgpio.protocol.BgpFactories;
import org.onosproject.bgpio.protocol.BgpMessage;
import org.onosproject.bgpio.protocol.BgpMessageReader;
import org.onosproject.bgpio.protocol.ver4.BgpUpdateMsgVer4;

/**
 * Test for MP reach NLRI encoding and decoding.
 */
public class MpReachNlriTest {

    /**
     * This testcase checks BGP update message.
     */
    @Test
    public void mpReachNlriTest1() throws BgpParseException {

        // BGP flow spec Message
        byte[] flowSpecMsg = new byte[] {(byte) 0xff, (byte) 0xff,
                (byte) 0xff, (byte) 0xff, (byte) 0xff, (byte) 0xff,
                (byte) 0xff, (byte) 0xff, (byte) 0xff, (byte) 0xff,
                (byte) 0xff, (byte) 0xff, (byte) 0xff, (byte) 0xff,
                (byte) 0xff, (byte) 0xff, 0x00, 0x4a, 0x02, 0x00, 0x00, 0x00,
                0x33, 0x40, 0x01, 0x01, 0x00, 0x40, 0x02, 0x04, 0x02, 0x01,
                0x00, 0x64, (byte) 0x80, 0x04, 0x04, 0x00, 0x00, 0x00, 0x00,
                (byte) 0xc0, 0x10, 0x08, (byte) 0x80, 0x06, 0x00, 0x00, 0x00,
                0x00, 0x00, 0x00, (byte) 0x90, 0x0e, 0x00, 0x12, 0x00, 0x01,
                (byte) 0x85, 0x00, 0x00, 0x0c, 0x02, 0x20, (byte) 0xc0,
                (byte) 0xa8, 0x07, 0x36, 0x03, (byte) 0x81, 0x67, 0x04,
                (byte) 0x81, 0x01 };

        byte[] testFsMsg;
        ChannelBuffer buffer = ChannelBuffers.dynamicBuffer();
        buffer.writeBytes(flowSpecMsg);

        BgpMessageReader<BgpMessage> reader = BgpFactories.getGenericReader();
        BgpMessage message;
        BgpHeader bgpHeader = new BgpHeader();

        message = reader.readFrom(buffer, bgpHeader);

        assertThat(message, instanceOf(BgpUpdateMsgVer4.class));
        ChannelBuffer buf = ChannelBuffers.dynamicBuffer();
        message.writeTo(buf);

        int readLen = buf.writerIndex();
        testFsMsg = new byte[readLen];
        buf.readBytes(testFsMsg, 0, readLen);

        assertThat(testFsMsg, is(flowSpecMsg));
    }

    /**
     * This testcase checks BGP update message.
     */
    @Test
    public void mpReachNlriTest2() throws BgpParseException {

        // BGP flow spec Message
        byte[] flowSpecMsg = new byte[] {(byte) 0xff, (byte) 0xff,
                (byte) 0xff, (byte) 0xff, (byte) 0xff, (byte) 0xff,
                (byte) 0xff, (byte) 0xff, (byte) 0xff, (byte) 0xff,
                (byte) 0xff, (byte) 0xff, (byte) 0xff, (byte) 0xff,
                (byte) 0xff, (byte) 0xff, 0x00, 0x52, 0x02, 0x00, 0x00, 0x00,
                0x3b, 0x40, 0x01, 0x01, 0x01, 0x40, 0x02, 0x04, 0x02, 0x01,
                0x00, (byte) 0xc8, (byte) 0x80, 0x04, 0x04, 0x00, 0x00, 0x00,
                0x00, (byte) 0xc0, 0x10, 0x10, (byte) 0x80, 0x06, 0x00, 0x7b,
                0x40, 0x60, 0x00, 0x00, (byte) 0x80, 0x09, 0x00, 0x00, 0x00,
                0x00, 0x00, 0x0f, (byte) 0x90, 0x0e, 0x00, 0x12, 0x00, 0x01,
                (byte) 0x85, 0x00, 0x00, 0x0c, 0x01, 0x1e, (byte) 0xc0,
                (byte) 0xa8, 0x02, 0x00, 0x02, 0x1e, (byte) 0xc0, (byte) 0xa8,
                0x01, 0x00 };

        byte[] testFsMsg;
        ChannelBuffer buffer = ChannelBuffers.dynamicBuffer();
        buffer.writeBytes(flowSpecMsg);

        BgpMessageReader<BgpMessage> reader = BgpFactories.getGenericReader();
        BgpMessage message;
        BgpHeader bgpHeader = new BgpHeader();

        message = reader.readFrom(buffer, bgpHeader);

        assertThat(message, instanceOf(BgpUpdateMsgVer4.class));
        ChannelBuffer buf = ChannelBuffers.dynamicBuffer();
        message.writeTo(buf);

        int readLen = buf.writerIndex();
        testFsMsg = new byte[readLen];
        buf.readBytes(testFsMsg, 0, readLen);

        assertThat(testFsMsg, is(flowSpecMsg));
    }

    /**
     * This testcase checks BGP update message.
     */
    @Test
    public void mpReachNlriTest3() throws BgpParseException {

        // BGP flow spec Message
        byte[] flowSpecMsg = new byte[] {(byte) 0xff, (byte) 0xff,
                (byte) 0xff, (byte) 0xff, (byte) 0xff, (byte) 0xff,
                (byte) 0xff, (byte) 0xff, (byte) 0xff, (byte) 0xff,
                (byte) 0xff, (byte) 0xff, (byte) 0xff, (byte) 0xff,
                (byte) 0xff, (byte) 0xff, 0x00, 0x71, 0x02, 0x00, 0x00, 0x00,
                0x5a, 0x40, 0x01, 0x01, 0x01, 0x40, 0x02, 0x04, 0x02, 0x01,
                0x00, (byte) 0xc8, (byte) 0x80, 0x04, 0x04, 0x00, 0x00, 0x00,
                0x00, (byte) 0xc0, 0x10, 0x10, (byte) 0x80, 0x06, 0x00, 0x7b,
                0x40, 0x60, 0x00, 0x00, (byte) 0x80, 0x09, 0x00, 0x00, 0x00,
                0x00, 0x00, 0x0f, (byte) 0x90, 0x0e, 0x00, 0x31, 0x00, 0x01,
                (byte) 0x85, 0x00, 0x00, 0x2b, 0x01, 0x1e, (byte) 0xc0,
                (byte) 0xa8, 0x02, 0x00, 0x02, 0x1e, (byte) 0xc0, (byte) 0xa8,
                0x01, 0x00, 0x03, (byte) 0x80, 0x04, 0x04, (byte) 0x80,
                (byte) 0xb3, 0x05, (byte) 0x80, (byte) 0xc8, 0x06, (byte) 0x80,
                0x64, 0x07, (byte) 0x80, 0x7b, 0x08, (byte) 0x80, (byte) 0xea,
                0x09, (byte) 0x80, 0x7b, 0x0a, (byte) 0x90, 0x03, (byte) 0xe8,
                0x0b, (byte) 0x80, 0x7b, 0x0c, (byte) 0x80, 0x02 };

        byte[] testFsMsg;
        ChannelBuffer buffer = ChannelBuffers.dynamicBuffer();
        buffer.writeBytes(flowSpecMsg);

        BgpMessageReader<BgpMessage> reader = BgpFactories.getGenericReader();
        BgpMessage message;
        BgpHeader bgpHeader = new BgpHeader();

        message = reader.readFrom(buffer, bgpHeader);

        assertThat(message, instanceOf(BgpUpdateMsgVer4.class));
        ChannelBuffer buf = ChannelBuffers.dynamicBuffer();
        message.writeTo(buf);

        int readLen = buf.writerIndex();
        testFsMsg = new byte[readLen];
        buf.readBytes(testFsMsg, 0, readLen);

        assertThat(testFsMsg, is(flowSpecMsg));
    }
}