/*
    Copyright (c) 2007-2014 Contributors as noted in the AUTHORS file

    This file is part of 0MQ.

    0MQ is free software; you can redistribute it and/or modify it under
    the terms of the GNU Lesser General Public License as published by
    the Free Software Foundation; either version 3 of the License, or
    (at your option) any later version.

    0MQ is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

#include "testutil.hpp"

int main (void)
{
    setup_test_environment();
    void *ctx = zmq_ctx_new ();
    assert (ctx);

    //  Create a publisher
    void *pub = zmq_socket (ctx, ZMQ_PUB);
    assert (pub);
    int rc = zmq_bind (pub, "inproc://soname");
    assert (rc == 0);

    //  set pub socket options
    int wait = 1;
    rc = zmq_setsockopt (pub, ZMQ_XPUB_NODROP, &wait, 4);
    assert (rc == 0);

    int hwm = 2000;
    rc = zmq_setsockopt (pub, ZMQ_SNDHWM, &hwm, 4);
    assert (rc == 0);

    //  Create a subscriber
    void *sub = zmq_socket (ctx, ZMQ_SUB);
    assert (sub);
    rc = zmq_connect (sub, "inproc://soname");
    assert (rc == 0);

    //  Subscribe for all messages.
    rc = zmq_setsockopt (sub, ZMQ_SUBSCRIBE, "", 0);
    assert (rc == 0);

    int hwmlimit = hwm-1;
    int send_count = 0;
    //  Send an empty message
    for (int i = 0; i< hwmlimit; i++) {
      rc = zmq_send (pub, NULL, 0, 0);
      assert (rc == 0);
      send_count++;
    }

    int recv_count = 0;

    do {
      //  Receive the message in the subscriber
//      rc = zmq_recv (sub, buff, sizeof (buff), ZMQ_DONTWAIT);
      rc = zmq_recv (sub, NULL, 0, ZMQ_DONTWAIT);
      if( -1 == rc ) {
        assert(EAGAIN == errno);
      }
      else
      {
        assert( 0 == rc );
        recv_count++;
      }
    } while( 0 == rc);

    assert(send_count == recv_count);
    // now test real blocking behavior
    // set a timeout, default is infinite
    int timeout = 0;
    rc = zmq_setsockopt (pub, ZMQ_SNDTIMEO, &timeout, 4);
    assert (rc == 0);

    send_count = 0;
    recv_count = 0;
    hwmlimit = hwm;
    //  Send an empty message
    while( 0 == zmq_send (pub, NULL, 0, 0) )
    {
      send_count++;
    }
    assert( EAGAIN == errno);

    while( 0 == zmq_recv (sub, NULL, 0, ZMQ_DONTWAIT))
    {
      recv_count ++;
    }

    assert( send_count == recv_count);

    //  Clean up.
    rc = zmq_close (pub);
    assert (rc == 0);
    rc = zmq_close (sub);
    assert (rc == 0);
    rc = zmq_ctx_term (ctx);
    assert (rc == 0);

    return 0 ;
}