/*
     This file is part of GNUnet.
     Copyright (C) 2004, 2005, 2006, 2008, 2009, 2010 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 fs/test_fs_unindex_persistence.c
 * @brief simple testcase for simple publish + unindex operation
 * @author Christian Grothoff
 */
#include "platform.h"
#include "gnunet_util_lib.h"
#include "gnunet_testing_lib.h"
#include "gnunet_fs_service.h"

/**
 * File-size we use for testing.
 */
#define FILESIZE (1024 * 1024 * 2)

/**
 * How long until we give up on transmitting the message?
 */
#define TIMEOUT GNUNET_TIME_relative_multiply(GNUNET_TIME_UNIT_SECONDS, 60)

/**
 * How long should our test-content live?
 */
#define LIFETIME GNUNET_TIME_relative_multiply(GNUNET_TIME_UNIT_MINUTES, 15)


static struct GNUNET_TIME_Absolute start;

static struct GNUNET_FS_Handle *fs;

static struct GNUNET_FS_UnindexContext *unindex;

static struct GNUNET_FS_PublishContext *publish;

static char *fn;

static const struct GNUNET_CONFIGURATION_Handle *cfg;


static void
abort_publish_task(void *cls)
{
  GNUNET_FS_publish_stop(publish);
  publish = NULL;
}


static void
abort_unindex_task(void *cls)
{
  if (unindex != NULL)
    {
      GNUNET_FS_unindex_stop(unindex);
      unindex = NULL;
    }
  if (fn != NULL)
    {
      GNUNET_DISK_directory_remove(fn);
      GNUNET_free(fn);
      fn = NULL;
    }
}


static void *
progress_cb(void *cls, const struct GNUNET_FS_ProgressInfo *event);


static void
restart_fs_task(void *cls)
{
  GNUNET_FS_stop(fs);
  fs = GNUNET_FS_start(cfg, "test-fs-unindex-persistence", &progress_cb, NULL,
                       GNUNET_FS_FLAGS_PERSISTENCE, GNUNET_FS_OPTIONS_END);
}


/**
 * Consider scheduling the restart-task.
 * Only runs the restart task once per event
 * category.
 *
 * @param ev type of the event to consider
 */
static void
consider_restart(int ev)
{
  static int prev[32];
  static int off;
  int i;

  for (i = 0; i < off; i++)
    if (prev[i] == ev)
      return;
  prev[off++] = ev;
  GNUNET_SCHEDULER_add_with_priority(GNUNET_SCHEDULER_PRIORITY_URGENT,
                                     &restart_fs_task, NULL);
}


static void *
progress_cb(void *cls, const struct GNUNET_FS_ProgressInfo *event)
{
  switch (event->status)
    {
    case GNUNET_FS_STATUS_PUBLISH_PROGRESS:
      GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
                 "Publish is progressing (%llu/%llu at level %u off %llu)...\n",
                 (unsigned long long)event->value.publish.completed,
                 (unsigned long long)event->value.publish.size,
                 event->value.publish.specifics.progress.depth,
                 (unsigned long long)event->value.publish.specifics.
                 progress.offset);
      break;

    case GNUNET_FS_STATUS_PUBLISH_PROGRESS_DIRECTORY:
      break;

    case GNUNET_FS_STATUS_PUBLISH_COMPLETED:
      printf("Publishing complete, %llu kbps.\n",
             (unsigned long long)(FILESIZE * 1000000LL /
                                  (1 +
                                   GNUNET_TIME_absolute_get_duration
                                     (start).rel_value_us) / 1024));
      start = GNUNET_TIME_absolute_get();
      unindex = GNUNET_FS_unindex_start(fs, fn, "unindex");
      GNUNET_assert(unindex != NULL);
      break;

    case GNUNET_FS_STATUS_UNINDEX_COMPLETED:
      printf("Unindex complete,  %llu kbps.\n",
             (unsigned long long)(FILESIZE * 1000000LL /
                                  (1 +
                                   GNUNET_TIME_absolute_get_duration
                                     (start).rel_value_us) / 1024));
      GNUNET_SCHEDULER_add_now(&abort_unindex_task, NULL);
      break;

    case GNUNET_FS_STATUS_UNINDEX_PROGRESS:
      consider_restart(event->status);
      GNUNET_assert(unindex == event->value.unindex.uc);
      GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
                 "Unindex is progressing (%llu/%llu at level %u off %llu)...\n",
                 (unsigned long long)event->value.unindex.completed,
                 (unsigned long long)event->value.unindex.size,
                 event->value.unindex.specifics.progress.depth,
                 (unsigned long long)event->value.unindex.specifics.
                 progress.offset);
      break;

    case GNUNET_FS_STATUS_PUBLISH_SUSPEND:
      if (event->value.publish.pc == publish)
        publish = NULL;
      break;

    case GNUNET_FS_STATUS_PUBLISH_RESUME:
      if (NULL == publish)
        {
          publish = event->value.publish.pc;
          return "publish-context";
        }
      break;

    case GNUNET_FS_STATUS_UNINDEX_SUSPEND:
      GNUNET_assert(event->value.unindex.uc == unindex);
      unindex = NULL;
      break;

    case GNUNET_FS_STATUS_UNINDEX_RESUME:
      GNUNET_assert(NULL == unindex);
      unindex = event->value.unindex.uc;
      return "unindex";

    case GNUNET_FS_STATUS_PUBLISH_ERROR:
      fprintf(stderr, "Error publishing file: %s\n",
              event->value.publish.specifics.error.message);
      GNUNET_break(0);
      GNUNET_SCHEDULER_add_now(&abort_publish_task, NULL);
      break;

    case GNUNET_FS_STATUS_UNINDEX_ERROR:
      GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
                 "Error unindexing file: %s\n",
                 event->value.unindex.specifics.error.message);
      GNUNET_SCHEDULER_add_now(&abort_unindex_task, NULL);
      break;

    case GNUNET_FS_STATUS_PUBLISH_START:
      GNUNET_assert(0 == strcmp("publish-context", event->value.publish.cctx));
      GNUNET_assert(NULL == event->value.publish.pctx);
      GNUNET_assert(FILESIZE == event->value.publish.size);
      GNUNET_assert(0 == event->value.publish.completed);
      GNUNET_assert(1 == event->value.publish.anonymity);
      break;

    case GNUNET_FS_STATUS_PUBLISH_STOPPED:
      GNUNET_assert(publish == event->value.publish.pc);
      GNUNET_assert(FILESIZE == event->value.publish.size);
      GNUNET_assert(1 == event->value.publish.anonymity);
      GNUNET_FS_stop(fs);
      fs = NULL;
      break;

    case GNUNET_FS_STATUS_UNINDEX_START:
      consider_restart(event->status);
      GNUNET_assert(unindex == NULL);
      GNUNET_assert(0 == strcmp("unindex", event->value.unindex.cctx));
      GNUNET_assert(0 == strcmp(fn, event->value.unindex.filename));
      GNUNET_assert(FILESIZE == event->value.unindex.size);
      GNUNET_assert(0 == event->value.unindex.completed);
      break;

    case GNUNET_FS_STATUS_UNINDEX_STOPPED:
      GNUNET_assert(unindex == event->value.unindex.uc);
      GNUNET_SCHEDULER_add_now(&abort_publish_task, NULL);
      break;

    default:
      printf("Unexpected event: %d\n", event->status);
      break;
    }
  return NULL;
}


static void
run(void *cls,
    const struct GNUNET_CONFIGURATION_Handle *c,
    struct GNUNET_TESTING_Peer *peer)
{
  const char *keywords[] = {
    "down_foo",
    "down_bar",
  };
  char *buf;
  struct GNUNET_CONTAINER_MetaData *meta;
  struct GNUNET_FS_Uri *kuri;
  struct GNUNET_FS_FileInformation *fi;
  size_t i;
  struct GNUNET_FS_BlockOptions bo;

  cfg = c;
  fn = GNUNET_DISK_mktemp("gnunet-unindex-test-dst");
  fs = GNUNET_FS_start(cfg, "test-fs-unindex-persistence", &progress_cb, NULL,
                       GNUNET_FS_FLAGS_PERSISTENCE, GNUNET_FS_OPTIONS_END);
  GNUNET_assert(NULL != fs);
  buf = GNUNET_malloc(FILESIZE);
  for (i = 0; i < FILESIZE; i++)
    buf[i] = GNUNET_CRYPTO_random_u32(GNUNET_CRYPTO_QUALITY_WEAK, 256);
  GNUNET_assert(FILESIZE ==
                GNUNET_DISK_fn_write(fn, buf, FILESIZE,
                                     GNUNET_DISK_PERM_USER_READ |
                                     GNUNET_DISK_PERM_USER_WRITE));
  GNUNET_free(buf);
  meta = GNUNET_CONTAINER_meta_data_create();
  kuri = GNUNET_FS_uri_ksk_create_from_args(2, keywords);
  bo.content_priority = 42;
  bo.anonymity_level = 1;
  bo.replication_level = 0;
  bo.expiration_time = GNUNET_TIME_relative_to_absolute(LIFETIME);
  fi = GNUNET_FS_file_information_create_from_file(fs, "publish-context", fn,
                                                   kuri, meta, GNUNET_YES,
                                                   &bo);
  GNUNET_FS_uri_destroy(kuri);
  GNUNET_CONTAINER_meta_data_destroy(meta);
  GNUNET_assert(NULL != fi);
  start = GNUNET_TIME_absolute_get();
  publish =
    GNUNET_FS_publish_start(fs, fi, NULL, NULL, NULL,
                            GNUNET_FS_PUBLISH_OPTION_NONE);
  GNUNET_assert(publish != NULL);
}


int
main(int argc, char *argv[])
{
  if (0 != GNUNET_TESTING_peer_run("test-fs-unindex-persistence",
                                   "test_fs_unindex_data.conf",
                                   &run, NULL))
    return 1;
  return 0;
}

/* end of test_fs_unindex_persistence.c */