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package test.unit.gov.nist.javax.sip.stack;

import gov.nist.javax.sip.message.MessageFactoryImpl;
import gov.nist.javax.sip.stack.NioMessageProcessorFactory;

import java.text.ParseException;
import java.util.Properties;

import javax.sip.ClientTransaction;
import javax.sip.Dialog;
import javax.sip.DialogTerminatedEvent;
import javax.sip.IOExceptionEvent;
import javax.sip.ListeningPoint;
import javax.sip.PeerUnavailableException;
import javax.sip.RequestEvent;
import javax.sip.ResponseEvent;
import javax.sip.ServerTransaction;
import javax.sip.SipFactory;
import javax.sip.SipListener;
import javax.sip.SipProvider;
import javax.sip.SipStack;
import javax.sip.Transaction;
import javax.sip.TransactionAlreadyExistsException;
import javax.sip.TransactionTerminatedEvent;
import javax.sip.address.Address;
import javax.sip.address.AddressFactory;
import javax.sip.header.CSeqHeader;
import javax.sip.header.ContactHeader;
import javax.sip.header.HeaderFactory;
import javax.sip.header.ToHeader;
import javax.sip.message.MessageFactory;
import javax.sip.message.Request;
import javax.sip.message.Response;
import static junit.framework.Assert.assertTrue;

import junit.framework.TestCase;
import test.tck.msgflow.callflows.AssertUntil;
import test.tck.msgflow.callflows.NetworkPortAssigner;
import test.tck.msgflow.callflows.TestAssertion;

public class TransactionAlreadyExistsExceptionTest extends TestCase {
    public class Shootme implements SipListener {

        private AddressFactory addressFactory;

        private MessageFactory messageFactory;

        private HeaderFactory headerFactory;

        private SipStack sipStack;

        private static final String myAddress = "127.0.0.1";

        private final int myPort = NetworkPortAssigner.retrieveNextPort();

        private Dialog dialog;

        private int sawInvite;

        private boolean sawTransactionExistsException;

        public static final boolean callerSendsBye = true;
        
        public TestAssertion getAssertion() {
            return new TestAssertion() {
                @Override
                public boolean assertCondition() {
                    return sawInvite == 1;
                };
            }; 
        }         

        public void processRequest(RequestEvent requestEvent) {
            Request request = requestEvent.getRequest();
            ServerTransaction serverTransactionId = requestEvent.getServerTransaction();

            System.out.println("\n\nRequest " + request.getMethod() + " received at "
                    + sipStack.getStackName() + " with server transaction id "
                    + serverTransactionId);

            if (request.getMethod().equals(Request.INVITE)) {
                processInvite(requestEvent);
            }

        }

        public void processResponse(ResponseEvent responseEvent) {
        }

        /**
         * Process the ACK request. Send the bye and complete the call flow.
         */
        public void processAck(RequestEvent requestEvent, ServerTransaction serverTransaction) {
            try {
                System.out.println("shootme: got an ACK! ");
                System.out.println("Dialog State = " + dialog.getState());
                SipProvider provider = (SipProvider) requestEvent.getSource();
                if (!callerSendsBye) {
                    Request byeRequest = dialog.createRequest(Request.BYE);
                    ClientTransaction ct = provider.getNewClientTransaction(byeRequest);
                    dialog.sendRequest(ct);
                }
            } catch (Exception ex) {
                ex.printStackTrace();
            }

        }

        /**
         * Process the invite request.
         */
        public void processInvite(RequestEvent requestEvent) {
            SipProvider sipProvider = (SipProvider) requestEvent.getSource();
            Request request = requestEvent.getRequest();
            this.sawInvite ++;
            try {

                Response okResponse = messageFactory.createResponse(Response.OK, request);
                Address address = addressFactory.createAddress("Shootme ");
                ContactHeader contactHeader = headerFactory.createContactHeader(address);
                ToHeader toHeader = (ToHeader) okResponse.getHeader(ToHeader.NAME);
                toHeader.setTag("4321"); // Application is supposed to set.
                okResponse.addHeader(contactHeader);
                ServerTransaction stx = requestEvent.getServerTransaction();
                if ( stx == null ) {
                    stx = sipProvider.getNewServerTransaction(request);
                    stx.sendResponse(okResponse);
                }
            } catch (TransactionAlreadyExistsException ex) {
                this.sawTransactionExistsException = true;
                System.out.println("Saw TransactionAlreadyExistsException");
            } catch (Exception ex) {
                System.err.println("Unexpected exception" + ex);
                fail("Unexpected Exception seen");
            }
        }

        public void processTimeout(javax.sip.TimeoutEvent timeoutEvent) {
            Transaction transaction;
            if (timeoutEvent.isServerTransaction()) {
                transaction = timeoutEvent.getServerTransaction();
            } else {
                transaction = timeoutEvent.getClientTransaction();
            }
            System.out.println("state = " + transaction.getState());
            System.out.println("dialog = " + transaction.getDialog());
            System.out.println("dialogState = " + transaction.getDialog().getState());
            System.out.println("Transaction Time out");
        }

        public void init() {
            SipFactory sipFactory = null;
            sipStack = null;
            sipFactory = SipFactory.getInstance();
            sipFactory.setPathName("gov.nist");
            Properties properties = new Properties();
            properties.setProperty("javax.sip.STACK_NAME", "shootme");
            // You need 16 for logging traces. 32 for debug + traces.
            // Your code will limp at 32 but it is best for debugging.
            properties.setProperty("gov.nist.javax.sip.TRACE_LEVEL", "32");
            properties.setProperty("gov.nist.javax.sip.DEBUG_LOG", "shootmedebug.txt");
            properties.setProperty("gov.nist.javax.sip.SERVER_LOG", "shootmelog.txt");
            if(System.getProperty("enableNIO") != null && System.getProperty("enableNIO").equalsIgnoreCase("true")) {
            	properties.setProperty("gov.nist.javax.sip.MESSAGE_PROCESSOR_FACTORY", NioMessageProcessorFactory.class.getName());
            }
            try {
                // Create SipStack object
                sipStack = sipFactory.createSipStack(properties);
                System.out.println("sipStack = " + sipStack);
            } catch (PeerUnavailableException e) {
                // could not find
                // gov.nist.jain.protocol.ip.sip.SipStackImpl
                // in the classpath
                e.printStackTrace();
                System.err.println(e.getMessage());
                if (e.getCause() != null)
                    e.getCause().printStackTrace();
                junit.framework.TestCase.fail("Exit JVM");
            }

            try {
                headerFactory = sipFactory.createHeaderFactory();
                addressFactory = sipFactory.createAddressFactory();
                messageFactory = sipFactory.createMessageFactory();
                ((MessageFactoryImpl) messageFactory).setTest(true);
                ListeningPoint lp = sipStack.createListeningPoint("127.0.0.1", myPort, "udp");

                Shootme listener = this;

                SipProvider sipProvider = sipStack.createSipProvider(lp);
                System.out.println("udp provider " + sipProvider);
                sipProvider.addSipListener(listener);

            } catch (Exception ex) {
                ex.printStackTrace();
                fail("Unexpected exception");
            }

        }

        public void processIOException(IOExceptionEvent exceptionEvent) {
            fail("IOException");

        }

        public void processTransactionTerminated(
                TransactionTerminatedEvent transactionTerminatedEvent) {
            if (transactionTerminatedEvent.isServerTransaction())
                System.out.println("Transaction terminated event recieved"
                        + transactionTerminatedEvent.getServerTransaction());
            else
                System.out.println("Transaction terminated "
                        + transactionTerminatedEvent.getClientTransaction());

        }

        public void processDialogTerminated(DialogTerminatedEvent dialogTerminatedEvent) {
            Dialog d = dialogTerminatedEvent.getDialog();
            System.out.println("Local Party = " + d.getLocalParty());

        }

        public void terminate() {
            this.sipStack.stop();
        }

    }

    public class Shootist implements SipListener {

        private SipProvider sipProvider;

        private AddressFactory addressFactory;

        private MessageFactory messageFactory;

        private HeaderFactory headerFactory;

        private SipStack sipStack;

        private ContactHeader contactHeader;

        private ListeningPoint udpListeningPoint;

        private Dialog dialog;

        private boolean timeoutRecieved;

        boolean sawOk;
        
        private final int myPort = NetworkPortAssigner.retrieveNextPort();
        
        private  String PEER_ADDRESS;

        private  int PEER_PORT;

        private  String peerHostPort;

        public Shootist(Shootme shootme) {
            PEER_ADDRESS = shootme.myAddress;
            PEER_PORT = shootme.myPort;
            peerHostPort = PEER_ADDRESS + ":" + PEER_PORT;             
        }
        
        public TestAssertion getAssertion() {
            return new TestAssertion() {
                @Override
                public boolean assertCondition() {
                    return sawOk;
                };
            }; 
        }           
        
        

        public void processRequest(RequestEvent requestReceivedEvent) {

        }

        public void processResponse(ResponseEvent responseReceivedEvent) {
            try {
                if (responseReceivedEvent.getResponse().getStatusCode() == Response.OK) {
                    this.sawOk = true;
                    Dialog dialog = responseReceivedEvent.getDialog();
                    long cseq = ((CSeqHeader) responseReceivedEvent.getResponse().getHeader(
                            CSeqHeader.NAME)).getSeqNumber();
                    Request ack = dialog.createAck(cseq);
                    dialog.sendAck(ack);
                }
            } catch (Exception ex) {
                fail("Unexpected exception");

            }

        }

        public void processTimeout(javax.sip.TimeoutEvent timeoutEvent) {

            System.out.println("Got a timeout " + timeoutEvent.getClientTransaction());

            this.timeoutRecieved = true;
        }

        public void init() {
            SipFactory sipFactory = null;
            sipStack = null;
            sipFactory = SipFactory.getInstance();
            sipFactory.setPathName("gov.nist");
            Properties properties = new Properties();
            // If you want to try TCP transport change the following to
            String transport = "udp";
            properties.setProperty("javax.sip.OUTBOUND_PROXY", peerHostPort + "/" + transport);
            // If you want to use UDP then uncomment this.
            properties.setProperty("javax.sip.STACK_NAME", "shootist");

            // The following properties are specific to nist-sip
            // and are not necessarily part of any other jain-sip
            // implementation.
            // You can set a max message size for tcp transport to
            // guard against denial of service attack.
            properties.setProperty("gov.nist.javax.sip.DEBUG_LOG", "shootistdebug.txt");
            properties.setProperty("gov.nist.javax.sip.SERVER_LOG", "shootistlog.txt");

            // Drop the client connection after we are done with the
            // transaction.
            properties.setProperty("gov.nist.javax.sip.CACHE_CLIENT_CONNECTIONS", "false");
            // Set to 0 (or NONE) in your production code for max speed.
            // You need 16 (or TRACE) for logging traces. 32 (or DEBUG) for
            // debug + traces.
            // Your code will limp at 32 but it is best for debugging.
            properties.setProperty("gov.nist.javax.sip.TRACE_LEVEL", "DEBUG");
            if(System.getProperty("enableNIO") != null && System.getProperty("enableNIO").equalsIgnoreCase("true")) {
            	properties.setProperty("gov.nist.javax.sip.MESSAGE_PROCESSOR_FACTORY", NioMessageProcessorFactory.class.getName());
            }
            try {
                // Create SipStack object
                sipStack = sipFactory.createSipStack(properties);
                System.out.println("createSipStack " + sipStack);
            } catch (PeerUnavailableException e) {
                // could not find
                // gov.nist.jain.protocol.ip.sip.SipStackImpl
                // in the classpath
                e.printStackTrace();
                System.err.println(e.getMessage());
                fail("Problem with setup");
            }

            try {
                headerFactory = sipFactory.createHeaderFactory();
                addressFactory = sipFactory.createAddressFactory();
                messageFactory = sipFactory.createMessageFactory();
                udpListeningPoint = sipStack.createListeningPoint("127.0.0.1", myPort, "udp");
                sipProvider = sipStack.createSipProvider(udpListeningPoint);
                Shootist listener = this;
                sipProvider.addSipListener(listener);

                String retransmittedRequest = "INVITE sip:[email protected]:" + PEER_PORT + " SIP/2.0\r\n"
                        + "Call-ID: [email protected]\r\n"
                        + "CSeq: 1 INVITE\r\n"
                        + "From: \"The Master Blaster\" ;tag=12345\r\n"
                        + "To: \"The Little Blister\" \r\n"
                        + "Via: SIP/2.0/UDP 127.0.0.1:" + myPort + ";branch=z9hG4bKba9abfef1063941840d955a5e3e7dae0393734\r\n" 
                        + "Contact: <127.0.0.1:" + myPort + ">\r\n"
                        + "Max-Forwards: 70\r\n"
                        + "Content-Length: 0\r\n\r\n";

                System.out.println("Parsing message \n" + retransmittedRequest);
                Request request = null;
                try {
                    request = messageFactory.createRequest(retransmittedRequest);
                } catch (ParseException ex) {
                    System.out.println("Unexpected exception " + ex);
                    fail("Unexpected exception");
                }

               
                // send the request out.
                for ( int i = 0 ; i < 10; i++ ) {
                    sipProvider.sendRequest(request);
                }

               
            } catch (Exception ex) {
                ex.printStackTrace();
                fail("cannot create or send initial invite");
            }
        }

        public void processIOException(IOExceptionEvent exceptionEvent) {
            System.out.println("IOException happened for " + exceptionEvent.getHost()
                    + " port = " + exceptionEvent.getPort());

        }

        public void processTransactionTerminated(
                TransactionTerminatedEvent transactionTerminatedEvent) {
            System.out.println("Transaction terminated event recieved");
        }

        public void processDialogTerminated(DialogTerminatedEvent dialogTerminatedEvent) {
            System.out.println("dialogTerminatedEvent");

        }

        public void terminate() {
            this.sipStack.stop();
        }
    }

    private Shootme shootme;
    private Shootist shootist;

    public void setUp() {
        this.shootme = new Shootme();
        this.shootist = new Shootist(shootme);

    }

    public void tearDown() {
        shootist.terminate();
        shootme.terminate();
    }

    public void testSendInviteWithBadHeader() throws InterruptedException {
        this.shootme.init();
        this.shootist.init();
        assertTrue(
            AssertUntil.assertUntil(shootist.getAssertion()
            , 5000)
        );
        assertTrue(
            AssertUntil.assertUntil(shootme.getAssertion()
            , 5000)
        );
        
        assertTrue("Should see alreadyExistsException or only one INVITE seen", 
                shootme.sawTransactionExistsException || shootme.sawInvite == 1 );
        assertTrue("Should see response at shootist", shootist.sawOk);
    }
}




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