/*
     This file is part of GNUnet.
     (C) 2009 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 namestore/test_namestore_api_zone_iteration.c
 * @brief testcase for zone iteration functionality: iterate of a specific zone
 */
#include "platform.h"
#include "gnunet_common.h"
#include "gnunet_namestore_service.h"
#include "gnunet_testing_lib-new.h"
#include "namestore.h"


#define TIMEOUT GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 10)


static struct GNUNET_NAMESTORE_Handle * nsh;

static GNUNET_SCHEDULER_TaskIdentifier endbadly_task;

static GNUNET_SCHEDULER_TaskIdentifier stopiteration_task;

static struct GNUNET_CRYPTO_RsaPrivateKey * privkey;

static struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded pubkey;

static struct GNUNET_HashCode zone;

static struct GNUNET_CRYPTO_RsaPrivateKey * privkey2;

static struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded pubkey2;

static struct GNUNET_HashCode zone2;

static struct GNUNET_NAMESTORE_ZoneIterator *zi;

static int res;

static int returned_records;

static struct GNUNET_CRYPTO_RsaSignature *sig_1;

static char * s_name_1;

static struct GNUNET_NAMESTORE_RecordData *s_rd_1;

static struct GNUNET_CRYPTO_RsaSignature *sig_2;

static char * s_name_2;

static struct GNUNET_NAMESTORE_RecordData *s_rd_2;

static struct GNUNET_CRYPTO_RsaSignature *sig_3;

static char * s_name_3;

static struct GNUNET_NAMESTORE_RecordData *s_rd_3;


/**
 * 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 (stopiteration_task != GNUNET_SCHEDULER_NO_TASK)
  {
    GNUNET_SCHEDULER_cancel (stopiteration_task);
    stopiteration_task = GNUNET_SCHEDULER_NO_TASK;
  }

  if (nsh != NULL)
    GNUNET_NAMESTORE_disconnect (nsh);
  nsh = NULL;

  GNUNET_free_non_null(sig_1);
  GNUNET_free_non_null(sig_2);
  GNUNET_free_non_null(sig_3);
  GNUNET_free_non_null(s_name_1);
  GNUNET_free_non_null(s_name_2);
  GNUNET_free_non_null(s_name_3);

  if (s_rd_1 != NULL)
  {
    GNUNET_free ((void *)s_rd_1->data);
    GNUNET_free (s_rd_1);
  }
  if (s_rd_2 != NULL)
  {
    GNUNET_free ((void *)s_rd_2->data);
    GNUNET_free (s_rd_2);
  }
  if (s_rd_3 != NULL)
  {
    GNUNET_free ((void *)s_rd_3->data);
    GNUNET_free (s_rd_3);
  }

  if (privkey != NULL)
    GNUNET_CRYPTO_rsa_key_free (privkey);
  privkey = NULL;

  if (privkey2 != NULL)
    GNUNET_CRYPTO_rsa_key_free (privkey2);
  privkey2 = NULL;
  res = 1;
}


static void
end (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
{
  if (stopiteration_task != GNUNET_SCHEDULER_NO_TASK)
  {
    GNUNET_SCHEDULER_cancel (stopiteration_task);
    stopiteration_task = GNUNET_SCHEDULER_NO_TASK;
  }

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

  if (privkey != NULL)
    GNUNET_CRYPTO_rsa_key_free (privkey);
  privkey = NULL;

  if (privkey2 != NULL)
    GNUNET_CRYPTO_rsa_key_free (privkey2);
  privkey2 = NULL;

  GNUNET_free (sig_1);
  GNUNET_free (sig_2);
  GNUNET_free (sig_3);
  GNUNET_free (s_name_1);
  GNUNET_free (s_name_2);
  GNUNET_free (s_name_3);
  if (s_rd_1 != NULL)
  {
    GNUNET_free ((void *)s_rd_1->data);
    GNUNET_free (s_rd_1);
  }
  if (s_rd_2 != NULL)
  {
    GNUNET_free ((void *)s_rd_2->data);
    GNUNET_free (s_rd_2);
  }
  if (s_rd_3 != NULL)
  {
    GNUNET_free ((void *)s_rd_3->data);
    GNUNET_free (s_rd_3);
  }
  if (nsh != NULL)
    GNUNET_NAMESTORE_disconnect (nsh);
  nsh = NULL;
}


static void
zone_proc (void *cls,
	   const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *zone_key,
	   struct GNUNET_TIME_Absolute expire,
	   const char *name,
	   unsigned int rd_count,
	   const struct GNUNET_NAMESTORE_RecordData *rd,
	   const struct GNUNET_CRYPTO_RsaSignature *signature)
{
  int failed = GNUNET_NO;
  if ((zone_key == NULL) && (name == NULL))
  {
    GNUNET_break (3 == returned_records);
    if (3 == returned_records)
      res = 0;
    else
      res = 1;

    GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received last result, iteration done after receing %u results\n",returned_records );
    GNUNET_SCHEDULER_add_now (&end, NULL);
  }
  else
  {
    /* verify signature returned from name store */
    if (GNUNET_OK != GNUNET_NAMESTORE_verify_signature (zone_key, expire, name, rd_count, rd, signature))
    {
      struct GNUNET_HashCode zone_key_hash;
      GNUNET_CRYPTO_hash (zone_key, sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded), &zone_key_hash);
      GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Verifying signature for `%s' in zone `%s' with %u records  and expiration %llu failed\n", name, GNUNET_h2s(&zone_key_hash), rd_count, expire.abs_value);

      failed = GNUNET_YES;
      GNUNET_break (0);
    }

    GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Comparing results name %s \n", name);
    if (0 == strcmp (name, s_name_1))
    {
      if (rd_count == 1)
      {
        if (GNUNET_YES != GNUNET_NAMESTORE_records_cmp(rd, s_rd_1))
        {
          failed = GNUNET_YES;
          GNUNET_break (0);
        }
      }
      else
      {
        failed = GNUNET_YES;
        GNUNET_break (0);
      }
      if (0 != memcmp (signature, sig_1, sizeof (struct GNUNET_CRYPTO_RsaSignature)))
      {
        failed = GNUNET_YES;
        GNUNET_break (0);
      }
    }
    else if (0 == strcmp (name, s_name_2))
    {
      if (rd_count == 1)
      {
        if (GNUNET_YES != GNUNET_NAMESTORE_records_cmp(rd, s_rd_2))
        {
          failed = GNUNET_YES;
          GNUNET_break (0);
        }
      }
      else
      {
        failed = GNUNET_YES;
        GNUNET_break (0);
      }
      if (0 != memcmp (signature, sig_2, sizeof (struct GNUNET_CRYPTO_RsaSignature)))
      {
        failed = GNUNET_YES;
        GNUNET_break (0);
      }
    }
    else if (0 == strcmp (name, s_name_3))
    {
      if (rd_count == 1)
      {
        if (GNUNET_YES != GNUNET_NAMESTORE_records_cmp(rd, s_rd_3))
        {
          failed = GNUNET_YES;
          GNUNET_break (0);
        }
      }
      else
      {
        failed = GNUNET_YES;
        GNUNET_break (0);
      }
      if (GNUNET_OK != GNUNET_NAMESTORE_verify_signature(zone_key, expire, name, rd_count, rd, signature))
      {
        failed = GNUNET_YES;
        GNUNET_break (0);
      }

      if (0 != memcmp (signature, sig_3, sizeof (struct GNUNET_CRYPTO_RsaSignature)))
      {
        failed = GNUNET_YES;
        GNUNET_break (0);
      }
    }
    else
    {
      GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Comparing result failed: got name `%s'\n", name);
      res = 1;
      GNUNET_break (0);
      GNUNET_SCHEDULER_add_now (&end, NULL);
    }

    if (failed == GNUNET_NO)
    {
      returned_records ++;
      GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Telling namestore to send the next result\n");
      GNUNET_NAMESTORE_zone_iterator_next (zi);
    }
    else
    {
      GNUNET_break (0);
      GNUNET_SCHEDULER_add_now (&end, NULL);
    }
  }
}


static void
put_cont (void *cls, int32_t success, const char *emsg)
{
  static int c = 0;

  if (success == GNUNET_OK)
  {
    c++;
    GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Created record %u \n", c);
  }
  else
  {
    GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Failed to created records\n");
    GNUNET_break (0);
    GNUNET_SCHEDULER_cancel (endbadly_task);
    endbadly_task = GNUNET_SCHEDULER_add_now (&endbadly, NULL);
  }

  if (c == 3)
  {
    res = 1;
    returned_records = 0;
    GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "All records created, starting iteration over all zones \n");
    zi = GNUNET_NAMESTORE_zone_iteration_start(nsh,
					       NULL,
					       GNUNET_NAMESTORE_RF_NONE,
					       GNUNET_NAMESTORE_RF_NONE,
					       &zone_proc,
					       &zone);
    if (zi == NULL)
    {
      GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Failed to create zone iterator\n");
      GNUNET_break (0);
      GNUNET_SCHEDULER_cancel (endbadly_task);
      endbadly_task = GNUNET_SCHEDULER_add_now (&endbadly, NULL);
    }
  }
}


static struct GNUNET_NAMESTORE_RecordData *
create_record (unsigned int count)
{
  unsigned int c;
  struct GNUNET_NAMESTORE_RecordData * rd;

  rd = GNUNET_malloc (count * sizeof (struct GNUNET_NAMESTORE_RecordData));
  for (c = 0; c < count; c++)
  {
    rd[c].expiration_time = GNUNET_TIME_relative_to_absolute (GNUNET_TIME_UNIT_HOURS).abs_value;
    rd[c].record_type = 1111;
    rd[c].data_size = 50;
    rd[c].data = GNUNET_malloc(50);
    memset ((char *) rd[c].data, 'a', 50);
  }
  return rd;
}


/**
 * Callback called from the zone iterator when we iterate over
 * the empty zone.  Check that we got no records and then
 * start the actual tests by filling the zone.
 */
static void
empty_zone_proc (void *cls,
		 const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *zone_key,
		 struct GNUNET_TIME_Absolute expire,
		 const char *name,
		 unsigned int rd_count,
		 const struct GNUNET_NAMESTORE_RecordData *rd,
		 const struct GNUNET_CRYPTO_RsaSignature *signature)
{
  char *hostkey_file;
  struct GNUNET_TIME_Absolute et;

  GNUNET_assert (nsh == cls);
  GNUNET_assert (NULL == name);
  GNUNET_assert (NULL == zone_key);
  zi = 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_rsa_key_create_from_file(hostkey_file);
  GNUNET_free (hostkey_file);
  GNUNET_assert (privkey != NULL);
  GNUNET_CRYPTO_rsa_key_get_public(privkey, &pubkey);
  GNUNET_CRYPTO_hash(&pubkey, sizeof (pubkey), &zone);


  GNUNET_asprintf(&hostkey_file,"zonefiles%s%s",DIR_SEPARATOR_STR,
      "HGU0A0VCU334DN7F2I9UIUMVQMM7JMSD142LIMNUGTTV9R0CF4EG.zkey");
  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Using zonekey file `%s' \n", hostkey_file);
  privkey2 = GNUNET_CRYPTO_rsa_key_create_from_file(hostkey_file);
  GNUNET_free (hostkey_file);

  GNUNET_assert (privkey2 != NULL);
  GNUNET_CRYPTO_rsa_key_get_public(privkey2, &pubkey2);
  GNUNET_CRYPTO_hash(&pubkey2, sizeof (pubkey), &zone2);

  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Created record 1\n");

  GNUNET_asprintf(&s_name_1, "dummy1");
  s_rd_1 = create_record(1);
  et.abs_value = s_rd_1->expiration_time;
  sig_1 = GNUNET_NAMESTORE_create_signature(privkey, et, s_name_1, s_rd_1, 1);
  GNUNET_NAMESTORE_record_create(nsh, privkey, s_name_1, s_rd_1, &put_cont, NULL);


  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Created record 2 \n");
  GNUNET_asprintf(&s_name_2, "dummy2");
  s_rd_2 = create_record(1);

  et.abs_value = s_rd_2->expiration_time;
  sig_2 = GNUNET_NAMESTORE_create_signature(privkey, et, s_name_2, s_rd_2, 1);
  GNUNET_NAMESTORE_record_create(nsh, privkey, s_name_2, s_rd_2, &put_cont, NULL);

  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Created record 3\n");
  /* name in different zone */
  GNUNET_asprintf(&s_name_3, "dummy3");
  s_rd_3 = create_record(1);
  et.abs_value = s_rd_3->expiration_time;
  sig_3 = GNUNET_NAMESTORE_create_signature(privkey2, et, s_name_3, s_rd_3, 1);
  GNUNET_NAMESTORE_record_put (nsh, &pubkey2, s_name_3, GNUNET_TIME_UNIT_FOREVER_ABS, 1, s_rd_3, sig_3, &put_cont, NULL);
}


static void
run (void *cls, 
     const struct GNUNET_CONFIGURATION_Handle *cfg,
     struct GNUNET_TESTING_Peer *peer)
{
  endbadly_task = GNUNET_SCHEDULER_add_delayed(TIMEOUT, &endbadly, NULL);
  nsh = GNUNET_NAMESTORE_connect (cfg);
  GNUNET_break (NULL != nsh);
  /* first, iterate over empty namestore */
  zi = GNUNET_NAMESTORE_zone_iteration_start(nsh,
					     NULL,
					     GNUNET_NAMESTORE_RF_NONE,
					     GNUNET_NAMESTORE_RF_NONE,
					     &empty_zone_proc,
					     nsh);
  if (NULL == zi)
  {
    GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Failed to create zone iterator\n");
    GNUNET_break (0);
    GNUNET_SCHEDULER_cancel (endbadly_task);
    endbadly_task = GNUNET_SCHEDULER_add_now (&endbadly, NULL);
  }
}


int
main (int argc, char *argv[])
{
  res = 1;
  if (0 != 
      GNUNET_TESTING_service_run ("test-namestore-api-zone-iteration",
				  "namestore",
				  "test_namestore_api.conf",
				  &run,
				  NULL))
    return 1;
  return res;
}


/* end of test_namestore_api_zone_iteration.c */