/*
    Copyright (c) 2013 Martin Sustrik  All rights reserved.

    Permission is hereby granted, free of charge, to any person obtaining a
   copy of this software and associated documentation files (the "Software"),
    to deal in the Software without restriction, including without limitation
    the rights to use, copy, modify, merge, publish, distribute, sublicense,
    and/or sell copies of the Software, and to permit persons to whom
    the Software is furnished to do so, subject to the following conditions:

    The above copyright notice and this permission notice shall be included
    in all copies or substantial portions of the Software.

    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
    THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
    FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
   DEALINGS IN THE SOFTWARE.
*/


#if defined _WIN32
#define poll WSAPoll
#ifndef WIN32_LEAN_AND_MEAN
#define WIN32_LEAN_AND_MEAN
#endif
#include <windows.h>
#include <winsock2.h>
#include <mswsock.h>
#else
#include <sys/select.h>
#endif
#include "compat_testutil.h"
#include <nng/compat/nanomsg/nn.h>
#include <nng/compat/nanomsg/pair.h>
#include <nng/compat/nanomsg/inproc.h>

/*  Test of polling via NN_SNDFD/NN_RCVFD mechanism. */

#define SOCKET_ADDRESS "inproc://a"

int sc;

void
routine1(NN_UNUSED void *arg)
{
	nn_sleep(10);
	test_send(sc, "ABC");
}

void
routine2(NN_UNUSED void *arg)
{
	nn_sleep(10);
	nn_term();
}

#define NN_IN 1
#define NN_OUT 2

int
getevents(int s, int events, int timeout)
{
	int    rc;
	fd_set pollset;
#if defined _WIN32
	SOCKET rcvfd;
	SOCKET sndfd;
#else
	int rcvfd;
	int sndfd;
	int maxfd;
#endif
	size_t         fdsz;
	struct timeval tv;
	int            revents;

#if !defined _WIN32
	maxfd = 0;
#endif
	FD_ZERO(&pollset);

	if (events & NN_IN) {
		fdsz = sizeof(rcvfd);
		rc   = nn_getsockopt(
                    s, NN_SOL_SOCKET, NN_RCVFD, (char *) &rcvfd, &fdsz);
		errno_assert(rc == 0);
		nn_assert(fdsz == sizeof(rcvfd));
		FD_SET(rcvfd, &pollset);
#if !defined _WIN32
		if (rcvfd + 1 > maxfd)
			maxfd = rcvfd + 1;
#endif
	}

	if (events & NN_OUT) {
		fdsz = sizeof(sndfd);
		rc   = nn_getsockopt(
                    s, NN_SOL_SOCKET, NN_SNDFD, (char *) &sndfd, &fdsz);
		errno_assert(rc == 0);
		nn_assert(fdsz == sizeof(sndfd));
		FD_SET(sndfd, &pollset);
#if !defined _WIN32
		if (sndfd + 1 > maxfd)
			maxfd = sndfd + 1;
#endif
	}

	if (timeout >= 0) {
		tv.tv_sec  = timeout / 1000;
		tv.tv_usec = (timeout % 1000) * 1000;
	}
#if defined _WIN32
	rc = select(0, &pollset, NULL, NULL, timeout < 0 ? NULL : &tv);
	wsa_assert(rc != SOCKET_ERROR);
#else
	rc = select(maxfd, &pollset, NULL, NULL, timeout < 0 ? NULL : &tv);
	errno_assert(rc >= 0);
#endif
	revents = 0;
	if ((events & NN_IN) && FD_ISSET(rcvfd, &pollset))
		revents |= NN_IN;
	if ((events & NN_OUT) && FD_ISSET(sndfd, &pollset))
		revents |= NN_OUT;
	return revents;
}

int
main()
{
	int              rc;
	int              sb;
	char             buf[3];
	struct nn_thread thread;
	struct nn_pollfd pfd[2];

	/* Test nn_poll() function. */
	sb = test_socket(AF_SP, NN_PAIR);
	test_bind(sb, SOCKET_ADDRESS);
	sc = test_socket(AF_SP, NN_PAIR);
	test_connect(sc, SOCKET_ADDRESS);
	nn_sleep(200);
	test_send(sc, "ABC");
	nn_sleep(100);
	pfd[0].fd     = sb;
	pfd[0].events = NN_POLLIN | NN_POLLOUT;
	pfd[1].fd     = sc;
	pfd[1].events = NN_POLLIN | NN_POLLOUT;
	rc            = nn_poll(pfd, 2, -1);
	errno_assert(rc >= 0);
	nn_assert(rc == 2);
	nn_assert(pfd[0].revents == (NN_POLLIN | NN_POLLOUT));
	nn_assert(pfd[1].revents == NN_POLLOUT);
	test_close(sc);
	test_close(sb);

	/*  Create a simple topology. */
	sb = test_socket(AF_SP, NN_PAIR);
	test_bind(sb, SOCKET_ADDRESS);
	sc = test_socket(AF_SP, NN_PAIR);
	test_connect(sc, SOCKET_ADDRESS);

	/*  Check the initial state of the socket. */
	rc = getevents(sb, NN_IN | NN_OUT, 1000);
	nn_assert(rc == NN_OUT);

	/*  Poll for IN when there's no message available. The call should
	    time out. */
	rc = getevents(sb, NN_IN, 10);
	nn_assert(rc == 0);

	/*  Send a message and start polling. This time IN event should be
	    signaled. */
	test_send(sc, "ABC");
	rc = getevents(sb, NN_IN, 1000);
	nn_assert(rc == NN_IN);

	/*  Receive the message and make sure that IN is no longer signaled. */
	test_recv(sb, "ABC");
	rc = getevents(sb, NN_IN, 10);
	nn_assert(rc == 0);

	/*  Check signalling from a different thread. */
	nn_thread_init(&thread, routine1, NULL);
	rc = getevents(sb, NN_IN, 1000);
	nn_assert(rc == NN_IN);
	test_recv(sb, "ABC");
	nn_thread_term(&thread);

	/*  Check terminating the library from a different thread. */
	nn_thread_init(&thread, routine2, NULL);
	rc = nn_recv(sb, buf, sizeof(buf), 0);
	nn_assert(rc < 0 && nn_errno() == EBADF);
	nn_thread_term(&thread);

	/*  Clean up. */
	test_close(sc);
	test_close(sb);

	return 0;
}