/*
     This file is part of GNUnet.
     Copyright (C) 2012 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., 51 Franklin Street, Fifth Floor,
     Boston, MA 02110-1301, USA.
*/
/**
 * @file namecache/test_namecache_api.c
 * @brief testcase for namecache_api.c: store a record and perform a lookup
 */
#include "platform.h"
#include "gnunet_namecache_service.h"
#include "gnunet_testing_lib.h"

#define TEST_RECORD_TYPE 1234

#define TEST_RECORD_DATALEN 123

#define TEST_RECORD_DATA 'a'

#define TIMEOUT GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 100)


static struct GNUNET_NAMECACHE_Handle *nsh;

static struct GNUNET_SCHEDULER_Task * endbadly_task;

static struct GNUNET_CRYPTO_EcdsaPrivateKey *privkey;

static struct GNUNET_CRYPTO_EcdsaPublicKey pubkey;

static int res;

static struct GNUNET_NAMECACHE_QueueEntry *nsqe;


static void
cleanup ()
{
  if (NULL != nsh)
  {
    GNUNET_NAMECACHE_disconnect (nsh);
    nsh = NULL;
  }
  if (NULL != privkey)
  {
    GNUNET_free (privkey);
    privkey = NULL;
  }
  GNUNET_SCHEDULER_shutdown ();
}


/**
 * Re-establish the connection to the service.
 *
 * @param cls handle to use to re-connect.
 * @param tc scheduler context
 */
static void
endbadly (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
{
  if (NULL != nsqe)
  {
    GNUNET_NAMECACHE_cancel (nsqe);
    nsqe = NULL;
  }
  cleanup ();
  res = 1;
}


static void
end (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
{
  cleanup ();
  res = 0;
}


static void
rd_decrypt_cb (void *cls,
               unsigned int rd_count,
               const struct GNUNET_GNSRECORD_Data *rd)
{
  char rd_cmp_data[TEST_RECORD_DATALEN];

  GNUNET_assert (1 == rd_count);
  GNUNET_assert (NULL != rd);

  memset (rd_cmp_data, 'a', TEST_RECORD_DATALEN);

  GNUNET_assert (TEST_RECORD_TYPE == rd[0].record_type);
  GNUNET_assert (TEST_RECORD_DATALEN == rd[0].data_size);
  GNUNET_assert (0 == memcmp (&rd_cmp_data, rd[0].data, TEST_RECORD_DATALEN));

  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
	      "Block was decrypted successfully \n");

	GNUNET_SCHEDULER_add_now (&end, NULL);
}

static void
name_lookup_proc (void *cls,
                  const struct GNUNET_GNSRECORD_Block *block)
{
  const char *name = cls;
  nsqe = NULL;

  GNUNET_assert (NULL != cls);

  if (endbadly_task != NULL)
  {
    GNUNET_SCHEDULER_cancel (endbadly_task);
    endbadly_task = NULL;
  }

  if (NULL == block)
  {
    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
  	      _("Namecache returned no block\n"));
    if (endbadly_task != NULL)
      GNUNET_SCHEDULER_cancel (endbadly_task);
    endbadly_task =  GNUNET_SCHEDULER_add_now (&endbadly, NULL);
    return;
  }

  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
	      "Namecache returned block, decrypting \n");
  GNUNET_assert (GNUNET_OK == GNUNET_GNSRECORD_block_decrypt(block,
  		&pubkey, name, &rd_decrypt_cb, (void *) name));
}

static void
cache_cont (void *cls, int32_t success, const char *emsg)
{
  const char *name = cls;
  struct GNUNET_HashCode derived_hash;

  GNUNET_assert (NULL != cls);

  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
	      "Name store cached record for `%s': %s\n",
	      name,
	      (success == GNUNET_OK) ? "SUCCESS" : "FAIL");

  /* Create derived hash */
  GNUNET_GNSRECORD_query_from_public_key (&pubkey, name, &derived_hash);

  nsqe = GNUNET_NAMECACHE_lookup_block (nsh, &derived_hash,
					 &name_lookup_proc, (void *) name);
}


static void
run (void *cls,
     const struct GNUNET_CONFIGURATION_Handle *cfg,
     struct GNUNET_TESTING_Peer *peer)
{
  struct GNUNET_GNSRECORD_Data rd;
  struct GNUNET_GNSRECORD_Block *block;
  char *hostkey_file;
  const char * name = "dummy.dummy.gnunet";

  endbadly_task = GNUNET_SCHEDULER_add_delayed (TIMEOUT,
						&endbadly, NULL);
  GNUNET_asprintf (&hostkey_file,
		   "zonefiles%s%s",
		   DIR_SEPARATOR_STR,
		   "N0UJMP015AFUNR2BTNM3FKPBLG38913BL8IDMCO2H0A1LIB81960.zkey");
  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Using zonekey file `%s' \n", hostkey_file);
  privkey = GNUNET_CRYPTO_ecdsa_key_create_from_file (hostkey_file);
  GNUNET_free (hostkey_file);
  GNUNET_assert (privkey != NULL);
  GNUNET_CRYPTO_ecdsa_key_get_public (privkey, &pubkey);


  rd.expiration_time = GNUNET_TIME_absolute_get().abs_value_us + 10000000000;
  rd.record_type = TEST_RECORD_TYPE;
  rd.data_size = TEST_RECORD_DATALEN;
  rd.data = GNUNET_malloc (TEST_RECORD_DATALEN);
  rd.flags = 0;
  memset ((char *) rd.data, 'a', TEST_RECORD_DATALEN);
  block = GNUNET_GNSRECORD_block_create (privkey,
                                         GNUNET_TIME_UNIT_FOREVER_ABS,
                                         name, &rd, 1);
  if (NULL == block)
  {
    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
                "Namecache cannot cache no block!\n");
    GNUNET_SCHEDULER_shutdown ();
    GNUNET_free (block);
    return;
  }

  nsh = GNUNET_NAMECACHE_connect (cfg);
  if (NULL == nsh)
  {
    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
              _("Namecache cannot connect to namecache\n"));
    GNUNET_SCHEDULER_shutdown ();
    GNUNET_free (block);
    return;
  }
  GNUNET_break (NULL != nsh);

  nsqe = GNUNET_NAMECACHE_block_cache (nsh,
                                       block,
                                       &cache_cont, (void *) name);
  if (NULL == nsqe)
  {
    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
  	      _("Namecache cannot cache no block\n"));
  }
  GNUNET_free (block);
  GNUNET_free ((void *)rd.data);
}


int
main (int argc, char *argv[])
{
  GNUNET_DISK_directory_remove ("/tmp/test-gnunet-namecache/");
  res = 1;
  if (0 !=
      GNUNET_TESTING_service_run ("test-namecache-api",
				  "namecache",
				  "test_namecache_api.conf",
				  &run,
				  NULL))
    return 1;
  return res;
}


/* end of test_namecache_api_cache_block.c */