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#ifndef LIBRARY_SRC_TEAM_TRACKER_HPP_
#define LIBRARY_SRC_TEAM_TRACKER_HPP_

/**
 * @file team_tracker.hpp
 * Defines the TeamTracker class
 */

#include <vector>

#include "roc_shmem/roc_shmem.hpp"

namespace rocshmem {

class Team;

/**
 * @class TeamTracker team_tracker.hpp
 *
 * @brief Container class for team information
 */
class TeamTracker {
 public:
  /**
   * @brief Primary constructor
   */
  TeamTracker();

  /**
   * @brief Add team from the list of user-created teams
   *
   * @param[in] team which needs to be added to tracker
   *
   * @param void
   */
  void track(roc_shmem_team_t team);

  /**
   * @brief Remove team from the list of user-created teams
   *
   * @param[in] team which needs to be removed from tracker
   *
   * @return void
   */
  void untrack(roc_shmem_team_t team);

  /**
   * @brief Remove all teams from the list of user-created teams
   *
   * @return void
   */
  template <typename FN_T>
  void destroy_all(FN_T&& team_destroy) {
    while (!teams_.empty()) {
      team_destroy(teams_.back());
      teams_.pop_back();
    }
  }

  /**
   * @brief Get the number of teams created by the user
   *
   * @return number of teams currently being tracked
   */
  int get_num_user_teams() { return teams_.size(); }

  /**
   * @brief Get maximum number of teams supported by tracker
   *
   * @return number of teams supported by tracker
   */
  __host__ __device__ int get_max_num_teams() { return max_num_teams_; }

  /**
   * @brief Get team world pointer
   *
   * @return team world pointer
   */
  __host__ Team* get_team_world() { return team_world_; }

  /**
   * @brief Set team world pointer
   *
   * @param[in] team_world pointer
   *
   * @return void
   */
  __host__ void set_team_world(Team* team_world) { team_world_ = team_world; }

 private:
  /**
   * @brief List of teams created by the user.
   */
  std::vector<roc_shmem_team_t> teams_{};

  /**
   * @brief The maximum number of teams the user can create.
   *
   * This constraint is required since the library needs to
   * pre-allocate resources (e.g. LDS, working arrays, etc.)
   * for teams.
   */
  int max_num_teams_{40};

  /**
   * @brief Pointer to implementation of ROC_SHMEM_TEAM_WORLD
   */
  Team* team_world_{nullptr};
};

}  // namespace rocshmem

#endif  // LIBRARY_SRC_TEAM_TRACKER_HPP_