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package model;

import gov.nist.javax.sip.DialogTimeoutEvent;
import gov.nist.javax.sip.SipListenerExt;
import java.net.InetAddress;
import java.text.ParseException;
import java.util.*;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.sip.DialogTerminatedEvent;
import javax.sip.IOExceptionEvent;
import javax.sip.InvalidArgumentException;
import javax.sip.ListeningPoint;
import javax.sip.RequestEvent;
import javax.sip.ResponseEvent;
import javax.sip.SipException;
import javax.sip.SipFactory;
import javax.sip.SipProvider;
import javax.sip.SipStack;
import javax.sip.TimeoutEvent;
import javax.sip.TransactionTerminatedEvent;
import javax.sip.address.*;
import javax.sip.header.*;
import javax.sip.message.*;

/**
 *
 * @author Normal
 */
public class VoIP implements SipListenerExt
{
  SipFactory sipFactory;          // Used to access the SIP API.
  SipStack sipStack;              // The SIP stack.
  SipProvider sipProvider;        // Used to send SIP messages.
  MessageFactory messageFactory;  // Used to create SIP message factory.
  HeaderFactory headerFactory;    // Used to create SIP headers.
  AddressFactory addressFactory;  // Used to create SIP URIs.
  ListeningPoint listeningPoint;  // SIP listening IP address/port.
  Properties properties;          // Other properties.
  
  private int counter;
  private int myPort = 5060;
  
  private String myName = "129";
  private String protocolTyp = "UDP";
  private String myIPAddress;
  int tag = (new Random()).nextInt();
  private int branch = hashCode();
  Address contactAddress;
  private ContactHeader contactHeader;
  

  public VoIP()      
  {
    
    try
    {
      //wird an sich erstmal nicht gebraucht aber später sinnvoll um in die unteren Daten zu ergänzen
      String abc = InetAddress.getLocalHost().getHostAddress();
      this.myIPAddress = InetAddress.getLocalHost().getHostAddress();
      this.sipFactory = SipFactory.getInstance();
      this.sipFactory.setPathName("gov.nist");
      this.properties = new Properties();
      this.properties.setProperty("javax.sip.STACK_NAME", "stack");
      this.sipStack = this.sipFactory.createSipStack(this.properties);
      this.messageFactory = this.sipFactory.createMessageFactory();
      this.headerFactory = this.sipFactory.createHeaderFactory();
      this.addressFactory = this.sipFactory.createAddressFactory();
      this.listeningPoint = this.sipStack.createListeningPoint(this.myIPAddress, this.myPort, this.protocolTyp);
      this.sipProvider = this.sipStack.createSipProvider(this.listeningPoint);
      this.sipProvider.addSipListener(this);
      this.contactAddress = this.addressFactory.createAddress("sip:129@" + this.myIPAddress+ ":" + this.myPort); //+ ":" + this.myPort
      this.contactHeader = this.headerFactory.createContactHeader(contactAddress);
    }
    catch (Exception e)
    {
      System.out.println("Shit");
      System.exit(-1);
    }
    
  }
  public int hashCode()
  { 
    int temp = tag*(new Random(100)).nextInt();
    return temp;
  }

  public void sendRegister(String serverIP, int serverPort) throws ParseException, InvalidArgumentException, SipException 
  {
    System.out.println("-----------SendRegister-----------");
    Address addressto = this.addressFactory.createAddress("sip:192.168.100.11"); //evtl. mit Port: sip:192.168.100.11:5060
    Address addresstob = this.addressFactory.createAddress("sip:192.168.100.11"); //to get example maybe needed
    
    ToHeader to = this.headerFactory.createToHeader(addresstob, null); // Integer.toString(tag)  address + tag
    
    URI requestURI = addressto.getURI();
    
    CallIdHeader callId = this.sipProvider.getNewCallId();
    
    FromHeader from = this.headerFactory.createFromHeader(addresstob, String.valueOf(this.tag)); //this.contactAddress
  
    ArrayList via = new ArrayList(); //Via needs a List as input
    ViaHeader viaheader = this.headerFactory.createViaHeader(this.myIPAddress, this.myPort, "UDP", String.valueOf(branch));  
    via.add(viaheader);
    CSeqHeader cSeq = this.headerFactory.createCSeqHeader(1L, "REGISTER");
    MaxForwardsHeader maxForwards = this.headerFactory.createMaxForwardsHeader(70);
    AllowHeader allow = this.headerFactory.createAllowHeader("NOTIFY,INVITE,ACK,CANCEL,BYE,REFER,INFO,OPTIONS,MESSAGE");
    ExpiresHeader expire = this.headerFactory.createExpiresHeader(3600); //int value 
    //Create Request Header
    System.out.println("----REQUEST HEADER----");
    Request request = this.messageFactory.createRequest(requestURI, "REGISTER", callId, cSeq, from, to, via, maxForwards);
    
    request.addHeader(contactHeader);
    request.addHeader(allow);
    request.addHeader(expire);
    System.out.println(request);
    this.sipProvider.sendRequest(request);
    
  }

  @Override
  public void processDialogTimeout(DialogTimeoutEvent timeoutEvent)
  {
  }

  @Override
  public void processRequest(RequestEvent requestEvent)
  {
    System.out.println("RequestEvent " + requestEvent.getServerTransaction().getDialog());
  }

  @Override
  public void processResponse(ResponseEvent responseEvent) 
  {
    System.out.println("---Response---");
    System.out.println(responseEvent.getResponse());
   
      if (responseEvent.getResponse().getStatusCode() == Response.UNAUTHORIZED && counter ==0)
      {
        
        counter++;
   
      try {
        Address addresstob = this.addressFactory.createAddress("sip:129@192.168.100.11"); //"sip:Jan@192.168.100.11"
        ToHeader temp = (ToHeader)responseEvent.getResponse().getHeader("To");

        
        ToHeader to = this.headerFactory.createToHeader(addresstob, temp.getTag()); // Integer.toString(tag)  address + tag
        URI requestURI = addresstob.getURI();
        
        //CallIdHeader tempcall = (CallIdHeader)responseEvent.getResponse().getHeader("Call-ID");
        CallIdHeader callId = (CallIdHeader)responseEvent.getResponse().getHeader("Call-ID");
        FromHeader from = this.headerFactory.createFromHeader(addresstob, String.valueOf(this.tag)); //this.contactAddress 
        
        //set Authorization header evtl. user Name benutzen den es gibt
        WWWAuthenticateHeader abc = (WWWAuthenticateHeader)responseEvent.getResponse().getHeader("WWW-Authenticate");
        AuthorizationHeader auth = this.headerFactory.createAuthorizationHeader("Digest");//was kommt in den string
        
        auth.setRealm(abc.getRealm());
        auth.setNonce(abc.getNonce());
                Address addresstest = this.addressFactory.createAddress("sip:"+myName+"@192.168.100.11"); //vielleicht passwort setzen "sip:"+myName+":\"\"@192.168.100.11"
        auth.setURI(addresstest.getURI());
        //System.out.println("Test");
        //auth.setQop(abc.getQop());
        System.out.println("Test");
        //auth.setOpaque(abc.getOpaque());
        auth.setUsername(myName);
        System.out.println("-----auth------");
        System.out.println(auth);
       
        
        ArrayList via = new ArrayList(); //Via needs a List as input
        ViaHeader viaheader = this.headerFactory.createViaHeader(this.myIPAddress, this.myPort, "UDP", String.valueOf(branch+2));// String.valueOf(hashCode())string branch
        via.add(viaheader);
        
        CSeqHeader cSeq = this.headerFactory.createCSeqHeader(2L, "REGISTER");
        MaxForwardsHeader maxForwards = this.headerFactory.createMaxForwardsHeader(70);
        AllowHeader allow = this.headerFactory.createAllowHeader("NOTIFY,INVITE,ACK,CANCEL,BYE,REFER,INFO,OPTIONS,MESSAGE");
        ExpiresHeader expire = this.headerFactory.createExpiresHeader(3600); //int value
        
        //Zusätzliche Register Header nach Unauthorzied
        
        //Create Request Header
        System.out.println("----REQUEST HEADER2----");
        Request request = this.messageFactory.createRequest(requestURI, "REGISTER", callId, cSeq, from, to, via, maxForwards);
        request.addHeader(contactHeader);
        request.addHeader(allow);
        request.addHeader(expire);
        request.addHeader(auth);
        System.out.println(request);
        this.sipProvider.sendRequest(request);
      }
      catch (ParseException | SipException |InvalidArgumentException ex) {
        Logger.getLogger(VoIP.class.getName()).log(Level.SEVERE, null, ex);
      }
    
    }
    else if (responseEvent.getResponse().getStatusCode() == Response.OK)
    {
      System.out.println("responseEvent.getResponse()" + responseEvent.getResponse());

    }

  }

  @Override
  public void processTimeout(TimeoutEvent timeoutEvent)
  {
  }

  @Override
  public void processIOException(IOExceptionEvent exceptionEvent)
  {
  }

  @Override
  public void processTransactionTerminated(
          TransactionTerminatedEvent transactionTerminatedEvent)
  {
  }

  @Override
  public void processDialogTerminated(
          DialogTerminatedEvent dialogTerminatedEvent)
  {
  }
}