/*
      This file is part of GNUnet
      Copyright (C) 2021 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 testing/testing_api_cmd_hello_world.c
 * @brief Command to start the netjail peers.
 * @author t3sserakt
 */
#include "platform.h"
#include "gnunet_testing_ng_lib.h"
#include "testing_cmds.h"


/**
 * Struct to store information handed over to callbacks.
 *
 */
struct StopHelperState
{

  const char *helper_start_label;

  /**
   * The process handle
   */
  struct GNUNET_HELPER_Handle **helper;

  char *local_m;

  char *global_n;
};


/**
* Code to clean up resource this cmd used.
*
* @param cls closure
* @param cmd current CMD being cleaned up.
*/
static void
stop_testing_system_cleanup (void *cls)
{
}


/**
 * Trait function of this cmd does nothing.
 *
 */
static enum GNUNET_GenericReturnValue
stop_testing_system_traits (void *cls,
                            const void **ret,
                            const char *trait,
                            unsigned int index)
{
  return GNUNET_NO;
}


/**
* This function stops the helper process for each node.
*
* @param cls closure.
* @param is interpreter state.
*/
static void
stop_testing_system_run (void *cls,
                         struct GNUNET_TESTING_Interpreter *is)
{
  struct StopHelperState *shs = cls;
  struct GNUNET_HELPER_Handle **helper;
  const struct GNUNET_TESTING_Command *start_helper_cmd;

  start_helper_cmd = GNUNET_TESTING_interpreter_lookup_command (
    is,
    shs->helper_start_label);
  GNUNET_TESTING_get_trait_helper_handles (start_helper_cmd,
                                           &helper);

  for (int i = 1; i <= atoi (shs->global_n); i++)
  {
    for (int j = 1; j <= atoi (shs->local_m); j++)
    {
      GNUNET_HELPER_stop (helper[(i - 1) * atoi (shs->local_m) + j - 1],
                          GNUNET_YES);
    }
  }
}


/**
 * Create command.
 * @param helper_start_label label of the cmd to start the test system.
 * @param label name for command.
 * @param .
 * @param local_m Number of nodes in a network namespace. //TODO make this a unsigned int
 * @param global_n Number of network namespaces. //TODO make this a unsigned int
 * @return command.
 */
struct GNUNET_TESTING_Command
GNUNET_TESTING_cmd_stop_testing_system (const char *label,
                                        const char *helper_start_label,
                                        char *local_m,
                                        char *global_n)
{
  struct StopHelperState *shs;

  shs = GNUNET_new (struct StopHelperState);
  shs->helper_start_label = helper_start_label;
  shs->local_m = local_m;
  shs->global_n = global_n;
  {
    struct GNUNET_TESTING_Command cmd = {
      .cls = shs,
      .label = label,
      .run = &stop_testing_system_run,
      .cleanup = &stop_testing_system_cleanup,
      .traits = &stop_testing_system_traits
    };

    return cmd;
  }
}