/*
     This file is part of GNUnet.
     Copyright (C) 2013 GNUnet e.V.

     GNUnet is free software: you can redistribute it and/or modify it
     under the terms of the GNU Affero General Public License as published
     by the Free Software Foundation, either version 3 of the License,
     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
     Affero General Public License for more details.

     You should have received a copy of the GNU Affero General Public License
     along with this program.  If not, see <http://www.gnu.org/licenses/>.

     SPDX-License-Identifier: AGPL3.0-or-later
 */
/**
 * @file namestore/test_namestore_api_zone_iteration_specific_zone.c
 * @brief testcase for zone iteration functionality: iterate over a specific zone
 * @author Matthias Wachs
 */
#include "platform.h"
#include "gnunet_namestore_service.h"
#include "gnunet_testing_lib.h"
#include "namestore.h"
#include "gnunet_dnsparser_lib.h"

#define TEST_RECORD_TYPE GNUNET_DNSPARSER_TYPE_TXT


#define TIMEOUT GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 100)


static struct GNUNET_NAMESTORE_Handle *nsh;

static struct GNUNET_SCHEDULER_Task *endbadly_task;

static struct GNUNET_CRYPTO_EcdsaPrivateKey privkey;

static struct GNUNET_CRYPTO_EcdsaPrivateKey privkey2;

static struct GNUNET_NAMESTORE_ZoneIterator *zi;

static int res;

static int returned_records;

static char *s_name_1;

static struct GNUNET_GNSRECORD_Data *s_rd_1;

static char *s_name_2;

static struct GNUNET_GNSRECORD_Data *s_rd_2;

static char *s_name_3;

static struct GNUNET_GNSRECORD_Data *s_rd_3;


/**
 * Handle timeout.
 *
 * @param cls handle to use to re-connect.
 */
static void
endbadly (void *cls)
{
  endbadly_task = NULL;
  GNUNET_SCHEDULER_shutdown ();
  res = 1;
}


static void
end (void *cls)
{
  if (NULL != zi)
  {
    GNUNET_NAMESTORE_zone_iteration_stop (zi);
    zi = NULL;
  }
  if (NULL != endbadly_task)
  {
    GNUNET_SCHEDULER_cancel (endbadly_task);
    endbadly_task = NULL;
  }
  GNUNET_free (s_name_1);
  GNUNET_free (s_name_2);
  GNUNET_free (s_name_3);
  if (s_rd_1 != NULL)
  {
    GNUNET_free_nz ((void *) s_rd_1->data);
    GNUNET_free (s_rd_1);
  }
  if (s_rd_2 != NULL)
  {
    GNUNET_free_nz ((void *) s_rd_2->data);
    GNUNET_free (s_rd_2);
  }
  if (s_rd_3 != NULL)
  {
    GNUNET_free_nz ((void *) s_rd_3->data);
    GNUNET_free (s_rd_3);
  }
  if (nsh != NULL)
  {
    GNUNET_NAMESTORE_disconnect (nsh);
    nsh = NULL;
  }
}


static void
fail_cb (void *cls)
{
  GNUNET_assert (0);
  zi = NULL;
}


static void
zone_proc (void *cls,
           const struct GNUNET_CRYPTO_EcdsaPrivateKey *zone,
           const char *label,
           unsigned int rd_count,
           const struct GNUNET_GNSRECORD_Data *rd)
{
  int failed = GNUNET_NO;

  GNUNET_assert (NULL != zone);
  if (0 == GNUNET_memcmp (zone,
                          &privkey))
  {
    if (0 == strcmp (label, s_name_1))
    {
      if (rd_count == 1)
      {
        if (GNUNET_YES != GNUNET_GNSRECORD_records_cmp (rd, s_rd_1))
        {
          failed = GNUNET_YES;
          GNUNET_break (0);
        }
      }
      else
      {
        failed = GNUNET_YES;
        GNUNET_break (0);
      }
    }
    else if (0 == strcmp (label, s_name_2))
    {
      if (rd_count == 1)
      {
        if (GNUNET_YES != GNUNET_GNSRECORD_records_cmp (rd, s_rd_2))
        {
          failed = GNUNET_YES;
          GNUNET_break (0);
        }
      }
      else
      {
        GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
                    "Received invalid record count\n");
        failed = GNUNET_YES;
        GNUNET_break (0);
      }
    }
    else
    {
      GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
                  "Comparing result failed: got name `%s' for first zone\n",
                  label);
      failed = GNUNET_YES;
      GNUNET_break (0);
    }
  }
  else if (0 == GNUNET_memcmp (zone, &privkey2))
  {
    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
                "Received data for not requested zone\n");
    failed = GNUNET_YES;
    GNUNET_break (0);
  }
  else
  {
    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
                "Received invalid zone\n");
    failed = GNUNET_YES;
    GNUNET_break (0);
  }
  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,
                                         1);
  }
  else
  {
    GNUNET_break (0);
    res = 2;
    GNUNET_SCHEDULER_shutdown ();
  }
}


static void
zone_proc_end (void *cls)
{
  zi = NULL;
  GNUNET_break (2 == returned_records);
  if (2 == returned_records)
  {
    res = 0;   /* Last iteraterator callback, we are done */
  }
  else
  {
    res = 1;
  }

  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
              "Received last result, iteration done after receing %u results\n",
              returned_records);
  GNUNET_SCHEDULER_shutdown ();
}


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: `%s'\n",
                emsg);
    GNUNET_break (0);
    res = 2;
    GNUNET_SCHEDULER_shutdown ();
    return;
  }

  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,
                                                &privkey,
                                                &fail_cb,
                                                NULL,
                                                &zone_proc,
                                                NULL,
                                                &zone_proc_end,
                                                NULL);
    if (zi == NULL)
    {
      GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
                  "Failed to create zone iterator\n");
      GNUNET_break (0);
      res = 2;
      GNUNET_SCHEDULER_shutdown ();
      return;
    }
  }
}


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

  rd = GNUNET_new_array (count,
                         struct GNUNET_GNSRECORD_Data);
  for (unsigned int c = 0; c < count; c++)
  {
    rd[c].expiration_time = GNUNET_TIME_relative_to_absolute (
      GNUNET_TIME_UNIT_HOURS).abs_value_us;
    rd[c].record_type = TEST_RECORD_TYPE;
    rd[c].data_size = 50;
    rd[c].data = GNUNET_malloc (50);
    rd[c].flags = 0;
    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_EcdsaPrivateKey *zone,
                 const char *label,
                 unsigned int rd_count,
                 const struct GNUNET_GNSRECORD_Data *rd)
{
  GNUNET_assert (nsh == cls);
  if (NULL != zone)
  {
    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
                _ ("Expected empty zone but received zone private key\n"));
    GNUNET_break (0);
    res = 2;
    GNUNET_SCHEDULER_shutdown ();
    return;
  }
  if ((NULL != label) || (NULL != rd) || (0 != rd_count))
  {
    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
                _ ("Expected no zone content but received data\n"));
    GNUNET_break (0);
    res = 2;
    GNUNET_SCHEDULER_shutdown ();
    return;
  }
  GNUNET_assert (0);
}


static void
empty_zone_proc_end (void *cls)
{
  zi = NULL;
  GNUNET_CRYPTO_ecdsa_key_create (&privkey);
  GNUNET_CRYPTO_ecdsa_key_create (&privkey2);
  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
              "Created record 1\n");
  GNUNET_asprintf (&s_name_1,
                   "dummy1");
  s_rd_1 = create_record (1);
  GNUNET_NAMESTORE_records_store (nsh,
                                  &privkey,
                                  s_name_1,
                                  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);
  GNUNET_NAMESTORE_records_store (nsh,
                                  &privkey,
                                  s_name_2,
                                  1,
                                  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);
  GNUNET_NAMESTORE_records_store (nsh,
                                  &privkey2,
                                  s_name_3,
                                  1, s_rd_3,
                                  &put_cont,
                                  NULL);
}


static void
run (void *cls,
     const struct GNUNET_CONFIGURATION_Handle *cfg,
     struct GNUNET_TESTING_Peer *peer)
{
  GNUNET_SCHEDULER_add_shutdown (&end,
                                 NULL);
  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,
                                              &fail_cb,
                                              NULL,
                                              &empty_zone_proc,
                                              nsh,
                                              &empty_zone_proc_end,
                                              nsh);
  if (NULL == zi)
  {
    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
                "Failed to create zone iterator\n");
    GNUNET_break (0);
    GNUNET_SCHEDULER_shutdown ();
  }
}


#include "test_common.c"


int
main (int argc, char *argv[])
{
  const char *plugin_name;
  char *cfg_name;

  SETUP_CFG (plugin_name, cfg_name);
  res = 1;
  if (0 !=
      GNUNET_TESTING_peer_run (
        "test-namestore-api-zone-iteration-specific-zone",
        cfg_name,
        &run,
        NULL))
  {
    res = 1;
  }
  GNUNET_DISK_purge_cfg_dir (cfg_name,
                             "GNUNET_TEST_HOME");
  GNUNET_free (cfg_name);
  return res;
}


/* end of test_namestore_api_zone_iteration_specific_zone.c */
