package net.onrc.onos.core.packet;

import static org.junit.Assert.*;
import static org.hamcrest.Matchers.*;

import org.junit.Before;
import org.junit.Test;

public class PacketTest {
    protected IPacket pkt1, pkt2, pkt3, pkt4;
    protected IPacket dummyPkt;
    protected IPacket[] packets;

    @Before
    public void setUp() {
        this.pkt1 = new Ethernet()
                .setDestinationMACAddress("00:11:22:33:44:55")
                .setSourceMACAddress("00:44:33:22:11:00")
                .setEtherType(Ethernet.TYPE_IPV4)
                .setPayload(
                        new IPv4()
                                .setTtl((byte) 128)
                                .setSourceAddress("192.168.1.1")
                                .setDestinationAddress("192.168.1.2")
                                .setPayload(new UDP()
                                        .setSourcePort((short) 5000)
                                        .setDestinationPort((short) 5001)
                                        .setPayload(new Data(new byte[]{0x01}))));

        this.pkt2 = new Ethernet()
                .setSourceMACAddress("00:44:33:22:11:01")
                .setDestinationMACAddress("00:11:22:33:44:55")
                .setEtherType(Ethernet.TYPE_ARP)
                .setVlanID((short) 5)
                .setPayload(
                        new ARP()
                                .setHardwareType(ARP.HW_TYPE_ETHERNET)
                                .setProtocolType(ARP.PROTO_TYPE_IP)
                                .setHardwareAddressLength((byte) 6)
                                .setProtocolAddressLength((byte) 4)
                                .setOpCode(ARP.OP_REPLY)
                                .setSenderHardwareAddress(Ethernet.toMACAddress("00:44:33:22:11:01"))
                                .setSenderProtocolAddress(IPv4.toIPv4AddressBytes("192.168.1.1"))
                                .setTargetHardwareAddress(Ethernet.toMACAddress("00:11:22:33:44:55"))
                                .setTargetProtocolAddress(IPv4.toIPv4AddressBytes("192.168.1.2")));


        this.pkt3 = new Ethernet()
                .setSourceMACAddress("00:44:33:22:11:01")
                .setDestinationMACAddress("00:11:22:33:44:55")
                .setEtherType(Ethernet.TYPE_ARP)
                .setPayload(
                        new ARP()
                                .setHardwareType(ARP.HW_TYPE_ETHERNET)
                                .setProtocolType(ARP.PROTO_TYPE_IP)
                                .setHardwareAddressLength((byte) 6)
                                .setProtocolAddressLength((byte) 4)
                                .setOpCode(ARP.OP_REPLY)
                                .setSenderHardwareAddress(Ethernet.toMACAddress("00:44:33:22:11:01"))
                                .setSenderProtocolAddress(IPv4.toIPv4AddressBytes("192.168.1.1"))
                                .setTargetHardwareAddress(Ethernet.toMACAddress("00:11:22:33:44:55"))
                                .setTargetProtocolAddress(IPv4.toIPv4AddressBytes("192.168.1.2")));

        this.pkt4 = new Ethernet()
                .setDestinationMACAddress("FF:FF:FF:FF:FF:FF")
                .setSourceMACAddress("00:11:33:55:77:01")
                .setEtherType(Ethernet.TYPE_IPV4)
                .setPayload(
                        new IPv4()
                                .setTtl((byte) 128)
                                .setSourceAddress("192.168.10.1")
                                .setDestinationAddress("192.168.255.255")
                                .setPayload(new UDP()
                                        .setSourcePort((short) 5000)
                                        .setDestinationPort((short) 5001)
                                        .setPayload(new Data(new byte[]{0x01}))));

        this.dummyPkt = new IPv4()
                .setTtl((byte) 32)
                .setSourceAddress("1.2.3.4")
                .setDestinationAddress("5.6.7.8");

        this.packets = new IPacket[]{pkt1, pkt2, pkt3, pkt4};
    }

    protected void doTestClone(IPacket pkt) {
        if (pkt.getPayload() != null) {
            doTestClone(pkt.getPayload());
        }
        IPacket newPkt = (IPacket) pkt.clone();
        assertSame(pkt.getClass(), newPkt.getClass());
        assertNotSame(pkt, newPkt);
        assertSame(pkt.getParent(), newPkt.getParent());
        assertEquals(pkt, newPkt);
        assertEquals(pkt.getPayload(), newPkt.getPayload());
        if (pkt.getPayload() != null) {
            assertNotSame(pkt.getPayload(), newPkt.getPayload());
        }

        if (pkt instanceof Ethernet) {
            Ethernet eth = (Ethernet) pkt;
            Ethernet newEth = (Ethernet) newPkt;
            newEth.setDestinationMACAddress(new byte[]{1, 2, 3, 4, 5, 6});
            assertEquals(false, newEth.getDestinationMAC()
                    .equals(eth.getDestinationMAC()));
            assertEquals(false, newPkt.equals(pkt));
        }
        if (pkt instanceof ARP) {
            ARP arp = (ARP) pkt;
            ARP newArp = (ARP) newPkt;
            newArp.setSenderProtocolAddress(new byte[]{1, 2, 3, 4});
            assertThat(newArp.getSenderProtocolAddress(),
                    not(equalTo(arp.getSenderProtocolAddress())));
            assertEquals(false, newPkt.equals(pkt));
        }

        byte[] dummyData = dummyPkt.serialize().clone();
        newPkt = (IPacket) pkt.clone();
        newPkt.deserialize(dummyData, 0, dummyData.length);
        assertEquals(false, newPkt.equals(pkt));
    }

    @Test
    public void testClone() {
        for (IPacket pkt : packets) {
            doTestClone(pkt);
        }
    }

}