/*
     This file is part of GNUnet.
     (C) 2009, 2010 Christian Grothoff (and other contributing authors)

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

     GNUnet 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
     General Public License for more details.

     You should have received a copy of the GNU General Public License
     along with GNUnet; see the file COPYING.  If not, write to the
     Free Software Foundation, Inc., 59 Temple Place - Suite 330,
     Boston, MA 02111-1307, USA.
*/
/**
 * @file util/test_server.c
 * @brief tests for server.c
 */
#include "platform.h"
#include "gnunet_common.h"
#include "gnunet_client_lib.h"
#include "gnunet_scheduler_lib.h"
#include "gnunet_server_lib.h"
#include "gnunet_time_lib.h"

#define VERBOSE GNUNET_NO

#define PORT 12435

#define TIMEOUT GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MILLISECONDS, 250)

#define MY_TYPE 128
#define MY_TYPE2 129

static struct GNUNET_SERVER_Handle *server;

static struct GNUNET_CLIENT_Connection *cc;

static struct GNUNET_SERVER_Client *argclient;

static struct GNUNET_CONFIGURATION_Handle *cfg;

static int ok;


static void
finish_up (void *cls,
	   const struct GNUNET_SCHEDULER_TaskContext *tc)
{
  GNUNET_assert (ok == 6);
  ok = 0;
  GNUNET_SERVER_destroy (server);
  GNUNET_CLIENT_disconnect (cc, GNUNET_NO);
  GNUNET_CONFIGURATION_destroy (cfg);
}


static void
recv_fin_cb (void *cls,
             struct GNUNET_SERVER_Client *client,
             const struct GNUNET_MessageHeader *message)
{
  GNUNET_assert (ok == 5);
  ok = 6;
  GNUNET_SERVER_receive_done (client, GNUNET_OK);
  GNUNET_SCHEDULER_add_now (&finish_up,
			    NULL);
}


static void
first_reply_handler (void *cls,
		     const struct GNUNET_MessageHeader *msg)
{
  GNUNET_assert (ok == 4);
  ok = 5;
  GNUNET_SERVER_receive_done (argclient, GNUNET_OK);
  GNUNET_SERVER_client_drop (argclient);
  argclient = NULL;
}


static size_t
reply_msg (void *cls, size_t size, void *buf)
{
  struct GNUNET_MessageHeader msg;

  GNUNET_assert (ok == 3);
  ok = 4;
  GNUNET_assert (size >= sizeof (struct GNUNET_MessageHeader));
  msg.type = htons (MY_TYPE);
  msg.size = htons (sizeof (struct GNUNET_MessageHeader));
  memcpy (buf, &msg, sizeof (struct GNUNET_MessageHeader));
  return sizeof (struct GNUNET_MessageHeader);
}


static void
recv_cb (void *cls,
         struct GNUNET_SERVER_Client *client,
         const struct GNUNET_MessageHeader *message)
{
  GNUNET_assert (ok == 2);
  ok = 3;
  argclient = client;
  GNUNET_SERVER_client_keep (argclient);
  GNUNET_assert (sizeof (struct GNUNET_MessageHeader) ==
                 ntohs (message->size));
  GNUNET_assert (MY_TYPE == ntohs (message->type));
  GNUNET_assert (NULL !=
                 GNUNET_SERVER_notify_transmit_ready (client,
                                                      ntohs (message->size),
                                                      TIMEOUT,
                                                      &reply_msg, NULL));
}


static struct GNUNET_SERVER_MessageHandler handlers[] = {
  {&recv_cb, NULL, MY_TYPE, sizeof (struct GNUNET_MessageHeader)},
  {&recv_fin_cb, NULL, MY_TYPE2, sizeof (struct GNUNET_MessageHeader)},
  {NULL, NULL, 0, 0}
};


static size_t
transmit_second_message (void *cls,
			 size_t size,
			 void *buf)
{
  struct GNUNET_MessageHeader msg;

  GNUNET_assert (size >= sizeof (struct GNUNET_MessageHeader));
  msg.type = htons (MY_TYPE2);
  msg.size = htons (sizeof (struct GNUNET_MessageHeader));
  memcpy (buf, &msg, sizeof (struct GNUNET_MessageHeader));
  return sizeof (struct GNUNET_MessageHeader);
}


static size_t
transmit_initial_message (void *cls,
			  size_t size,
			  void *buf)
{  
  struct GNUNET_MessageHeader msg;

  GNUNET_assert (ok == 1);
  ok = 2;
  GNUNET_assert (size >= sizeof (struct GNUNET_MessageHeader));
  msg.type = htons (MY_TYPE);
  msg.size = htons (sizeof (struct GNUNET_MessageHeader));
  memcpy (buf, &msg, sizeof (struct GNUNET_MessageHeader));
  GNUNET_assert (NULL !=
		 GNUNET_CLIENT_notify_transmit_ready (cc,
						      sizeof (struct GNUNET_MessageHeader),
						      TIMEOUT,
						      GNUNET_YES,
						      &transmit_second_message,
						      NULL));
  GNUNET_CLIENT_receive (cc, &first_reply_handler, NULL, TIMEOUT);
  return sizeof (struct GNUNET_MessageHeader);
}


static void
task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
{
  struct sockaddr_in sa;
  struct sockaddr * sap[2];
  socklen_t slens[2];

  sap[0] = (struct sockaddr*) &sa;
  slens[0] = sizeof (sa);
  sap[1] = NULL;
  slens[1] = 0;
  memset (&sa, 0, sizeof (sa));
#if HAVE_SOCKADDR_IN_SIN_LEN
  sa.sin_len = sizeof (sa);
#endif
  sa.sin_family = AF_INET;
  sa.sin_port = htons (PORT);
  server = GNUNET_SERVER_create (NULL,
                                 NULL,
                                 sap,
				 slens,
                                 TIMEOUT,
                                 GNUNET_NO);
  GNUNET_assert (server != NULL);
  GNUNET_SERVER_add_handlers (server, handlers);
  cfg = GNUNET_CONFIGURATION_create ();
  GNUNET_CONFIGURATION_set_value_number (cfg, "test-server", "PORT", PORT);
  GNUNET_CONFIGURATION_set_value_string (cfg, "test-server", "HOSTNAME", "localhost");
  GNUNET_CONFIGURATION_set_value_string (cfg, "resolver", "HOSTNAME", "localhost");
  cc = GNUNET_CLIENT_connect ("test-server",
			      cfg);
  GNUNET_assert (cc != NULL);
  GNUNET_assert (NULL !=
		 GNUNET_CLIENT_notify_transmit_ready (cc,
						      sizeof (struct GNUNET_MessageHeader),
						      TIMEOUT,
						      GNUNET_YES,
						      &transmit_initial_message,
						      NULL));
}


/**
 * Main method, starts scheduler with task1,
 * checks that "ok" is correct at the end.
 */
static int
check ()
{
  ok = 1;
  GNUNET_SCHEDULER_run (&task, &ok);
  return ok;
}


int
main (int argc, char *argv[])
{
  int ret = 0;

  GNUNET_log_setup ("test_server", "WARNING", NULL);
  ret += check ();

  return ret;
}

/* end of test_server.c */