/*
    Copyright (c) 2007-2017 Contributors as noted in the AUTHORS file

    This file is part of libzmq, the ZeroMQ core engine in C++.

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

    As a special exception, the Contributors give you permission to link
    this library with independent modules to produce an executable,
    regardless of the license terms of these independent modules, and to
    copy and distribute the resulting executable under terms of your choice,
    provided that you also meet, for each linked independent module, the
    terms and conditions of the license of that module. An independent
    module is a module which is not derived from or based on this library.
    If you modify this library, you must extend this exception to your
    version of the library.

    libzmq 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"


void test_stream_2_stream ()
{
    void *rbind, *rconn1;
    int ret;
    char buff[256];
    char msg[] = "hi 1";
    const char *bindip = "tcp://127.0.0.1:*";
    int disabled = 0;
    int zero = 0;
    size_t len = MAX_SOCKET_STRING;
    char my_endpoint[MAX_SOCKET_STRING];
    void *ctx = zmq_ctx_new ();

    //  Set up listener STREAM.
    rbind = zmq_socket (ctx, ZMQ_STREAM);
    assert (rbind);
    ret =
      zmq_setsockopt (rbind, ZMQ_STREAM_NOTIFY, &disabled, sizeof (disabled));
    assert (ret == 0);
    ret = zmq_setsockopt (rbind, ZMQ_LINGER, &zero, sizeof (zero));
    assert (0 == ret);
    ret = zmq_bind (rbind, bindip);
    assert (0 == ret);
    ret = zmq_getsockopt (rbind, ZMQ_LAST_ENDPOINT, my_endpoint, &len);
    assert (0 == ret);

    //  Set up connection stream.
    rconn1 = zmq_socket (ctx, ZMQ_STREAM);
    assert (rconn1);
    ret = zmq_setsockopt (rconn1, ZMQ_LINGER, &zero, sizeof (zero));
    assert (0 == ret);

    //  Do the connection.
    ret = zmq_setsockopt (rconn1, ZMQ_CONNECT_ROUTING_ID, "conn1", 6);
    assert (0 == ret);
    ret = zmq_connect (rconn1, my_endpoint);

    /*  Uncomment to test assert on duplicate routing id.
    //  Test duplicate connect attempt.
    ret = zmq_setsockopt (rconn1, ZMQ_CONNECT_ROUTING_ID, "conn1", 6);
    assert (0 == ret);
    ret = zmq_connect (rconn1, bindip);
    assert (0 == ret);
*/
    //  Send data to the bound stream.
    ret = zmq_send (rconn1, "conn1", 6, ZMQ_SNDMORE);
    assert (6 == ret);
    ret = zmq_send (rconn1, msg, 5, 0);
    assert (5 == ret);

    //  Accept data on the bound stream.
    ret = zmq_recv (rbind, buff, 256, 0);
    assert (ret);
    assert (0 == buff[0]);
    ret = zmq_recv (rbind, buff + 128, 128, 0);
    assert (5 == ret);
    assert ('h' == buff[128]);

    // Handle close of the socket.
    ret = zmq_unbind (rbind, my_endpoint);
    assert (0 == ret);
    ret = zmq_close (rbind);
    assert (0 == ret);
    ret = zmq_close (rconn1);
    assert (0 == ret);

    zmq_ctx_destroy (ctx);
}

void test_router_2_router (bool named_)
{
    void *rbind, *rconn1;
    int ret;
    char buff[256];
    char msg[] = "hi 1";
    const char *bindip = "tcp://127.0.0.1:*";
    int zero = 0;
    size_t len = MAX_SOCKET_STRING;
    char my_endpoint[MAX_SOCKET_STRING];
    void *ctx = zmq_ctx_new ();

    //  Create bind socket.
    rbind = zmq_socket (ctx, ZMQ_ROUTER);
    assert (rbind);
    ret = zmq_setsockopt (rbind, ZMQ_LINGER, &zero, sizeof (zero));
    assert (0 == ret);
    ret = zmq_bind (rbind, bindip);
    assert (0 == ret);
    ret = zmq_getsockopt (rbind, ZMQ_LAST_ENDPOINT, my_endpoint, &len);
    assert (0 == ret);

    //  Create connection socket.
    rconn1 = zmq_socket (ctx, ZMQ_ROUTER);
    assert (rconn1);
    ret = zmq_setsockopt (rconn1, ZMQ_LINGER, &zero, sizeof (zero));
    assert (0 == ret);

    //  If we're in named mode, set some identities.
    if (named_) {
        ret = zmq_setsockopt (rbind, ZMQ_ROUTING_ID, "X", 1);
        ret = zmq_setsockopt (rconn1, ZMQ_ROUTING_ID, "Y", 1);
    }

    //  Make call to connect using a connect_routing_id.
    ret = zmq_setsockopt (rconn1, ZMQ_CONNECT_ROUTING_ID, "conn1", 6);
    assert (0 == ret);
    ret = zmq_connect (rconn1, my_endpoint);
    assert (0 == ret);
    /*  Uncomment to test assert on duplicate routing id
    //  Test duplicate connect attempt.
    ret = zmq_setsockopt (rconn1, ZMQ_CONNECT_ROUTING_ID, "conn1", 6);
    assert (0 == ret);
    ret = zmq_connect (rconn1, bindip);
    assert (0 == ret);
*/
    //  Send some data.
    ret = zmq_send (rconn1, "conn1", 6, ZMQ_SNDMORE);
    assert (6 == ret);
    ret = zmq_send (rconn1, msg, 5, 0);
    assert (5 == ret);

    //  Receive the name.
    ret = zmq_recv (rbind, buff, 256, 0);
    if (named_)
        assert (ret && 'Y' == buff[0]);
    else
        assert (ret && 0 == buff[0]);

    //  Receive the data.
    ret = zmq_recv (rbind, buff + 128, 128, 0);
    assert (5 == ret && 'h' == buff[128]);

    //  Send some data back.
    if (named_) {
        ret = zmq_send (rbind, buff, 1, ZMQ_SNDMORE);
        assert (1 == ret);
    } else {
        ret = zmq_send (rbind, buff, 5, ZMQ_SNDMORE);
        assert (5 == ret);
    }
    ret = zmq_send_const (rbind, "ok", 3, 0);
    assert (3 == ret);

    //  If bound socket identity naming a problem, we'll likely see something funky here.
    ret = zmq_recv (rconn1, buff, 256, 0);
    assert ('c' == buff[0] && 6 == ret);
    ret = zmq_recv (rconn1, buff + 128, 128, 0);
    assert (3 == ret && 'o' == buff[128]);

    ret = zmq_unbind (rbind, my_endpoint);
    assert (0 == ret);
    ret = zmq_close (rbind);
    assert (0 == ret);
    ret = zmq_close (rconn1);
    assert (0 == ret);

    zmq_ctx_destroy (ctx);
}

void test_router_2_router_while_receiving ()
{
    void *xbind, *zbind, *yconn;
    int ret;
    char buff[256];
    char msg[] = "hi 1";
    const char *wildcard_bind = "tcp://127.0.0.1:*";
    int zero = 0;
    size_t len = MAX_SOCKET_STRING;
    char x_endpoint[MAX_SOCKET_STRING];
    char z_endpoint[MAX_SOCKET_STRING];
    void *ctx = zmq_ctx_new ();

    //  Create xbind socket.
    xbind = zmq_socket (ctx, ZMQ_ROUTER);
    assert (xbind);
    ret = zmq_setsockopt (xbind, ZMQ_LINGER, &zero, sizeof (zero));
    assert (0 == ret);
    ret = zmq_bind (xbind, wildcard_bind);
    assert (0 == ret);
    ret = zmq_getsockopt (xbind, ZMQ_LAST_ENDPOINT, x_endpoint, &len);
    assert (0 == ret);

    //  Create zbind socket.
    zbind = zmq_socket (ctx, ZMQ_ROUTER);
    assert (zbind);
    ret = zmq_setsockopt (zbind, ZMQ_LINGER, &zero, sizeof (zero));
    assert (0 == ret);
    ret = zmq_bind (zbind, wildcard_bind);
    assert (0 == ret);
    ret = zmq_getsockopt (zbind, ZMQ_LAST_ENDPOINT, z_endpoint, &len);
    assert (0 == ret);

    //  Create connection socket.
    yconn = zmq_socket (ctx, ZMQ_ROUTER);
    assert (yconn);
    ret = zmq_setsockopt (yconn, ZMQ_LINGER, &zero, sizeof (zero));
    assert (0 == ret);

    // set identites for each socket
    ret = zmq_setsockopt (xbind, ZMQ_ROUTING_ID, "X", 2);
    ret = zmq_setsockopt (yconn, ZMQ_ROUTING_ID, "Y", 2);
    ret = zmq_setsockopt (zbind, ZMQ_ROUTING_ID, "Z", 2);

    //  Connect Y to X using a routing id
    ret = zmq_setsockopt (yconn, ZMQ_CONNECT_ROUTING_ID, "X", 2);
    assert (0 == ret);
    ret = zmq_connect (yconn, x_endpoint);
    assert (0 == ret);

    //  Send some data from Y to X.
    ret = zmq_send (yconn, "X", 2, ZMQ_SNDMORE);
    assert (2 == ret);
    ret = zmq_send (yconn, msg, 5, 0);
    assert (5 == ret);

    // wait for the Y->X message to be received
    msleep (SETTLE_TIME);

    // Now X tries to connect to Z and send a message
    ret = zmq_setsockopt (xbind, ZMQ_CONNECT_ROUTING_ID, "Z", 2);
    assert (0 == ret);
    ret = zmq_connect (xbind, z_endpoint);
    assert (0 == ret);

    //  Try to send some data from X to Z.
    ret = zmq_send (xbind, "Z", 2, ZMQ_SNDMORE);
    assert (2 == ret);
    ret = zmq_send (xbind, msg, 5, 0);
    assert (5 == ret);

    // wait for the X->Z message to be received (so that our non-blocking check will actually
    // fail if the message is routed to Y)
    msleep (SETTLE_TIME);

    // nothing should have been received on the Y socket
    ret = zmq_recv (yconn, buff, 256, ZMQ_DONTWAIT);
    assert (ret == -1);
    assert (zmq_errno () == EAGAIN);

    // the message should have been received on the Z socket
    ret = zmq_recv (zbind, buff, 256, 0);
    assert (ret && 'X' == buff[0]);
    ret = zmq_recv (zbind, buff + 128, 128, 0);
    assert (5 == ret && 'h' == buff[128]);

    ret = zmq_unbind (xbind, x_endpoint);
    assert (0 == ret);
    ret = zmq_unbind (zbind, z_endpoint);
    assert (0 == ret);
    ret = zmq_close (yconn);
    assert (0 == ret);
    ret = zmq_close (xbind);
    assert (0 == ret);
    ret = zmq_close (zbind);
    assert (0 == ret);

    zmq_ctx_destroy (ctx);
}

int main (void)
{
    setup_test_environment ();

    test_stream_2_stream ();
    test_router_2_router (false);
    test_router_2_router (true);
    test_router_2_router_while_receiving ();

    return 0;
}