#ifndef ROBOT_INIT_H_INCLUDED
#define ROBOT_INIT_H_INCLUDED

#include <atomic>
#include <csignal>
#include <string>

namespace robot
{

/**
 * @brief Check if the robot system is still running
 * 
 * Similar to ros::ok(), this function returns false when the system
 * has finished shutting down. Use this in main loops and thread loops
 * to check if the system should continue running.
 * 
 * @return true if system is running, false if shutdown is complete
 * 
 * @note This returns false only after shutdown is complete, not when
 *       shutdown is requested. Use isShuttingDown() to check if shutdown
 *       has been requested.
 * 
 * Example:
 * @code
 * while (robot::ok())
 * {
 *   // Do work
 * }
 * @endcode
 */
bool ok();

/**
 * @brief Check if shutdown has been requested
 * 
 * Similar to ros::isShuttingDown(), this function returns true as soon
 * as shutdown() is called, not when shutdown is complete. Use this in
 * long-running callbacks to check if they should exit early.
 * 
 * @return true if shutdown has been requested, false otherwise
 * 
 * @note This returns true immediately when shutdown() is called, while
 *       ok() returns false only after shutdown is complete.
 * 
 * Example:
 * @code
 * void longCallback()
 * {
 *   for (int i = 0; i < 1000000; i++)
 *   {
 *     if (robot::isShuttingDown())
 *       return;  // Exit early
 *     // Do work...
 *   }
 * }
 * @endcode
 */
bool isShuttingDown();

/**
 * @brief Shutdown the robot system
 * 
 * Similar to ros::shutdown(), this function initiates the shutdown process.
 * After calling this:
 * - isShuttingDown() will return true immediately
 * - ok() will return false after shutdown is complete
 * 
 * @note This function is thread-safe and can be called multiple times.
 *       Subsequent calls have no effect.
 * 
 * Example:
 * @code
 * // Custom signal handler
 * void mySigintHandler(int sig)
 * {
 *   // Do custom cleanup
 *   robot::shutdown();
 * }
 * @endcode
 */
void shutdown();

/**
 * @brief Initialize the robot system
 * 
 * Similar to ros::init(), this function initializes the robot system.
 * It sets up signal handlers and initializes internal state.
 * 
 * @param argc Number of command line arguments (can be modified)
 * @param argv Command line arguments (can be modified)
 * @param node_name Name of the node (optional, for logging purposes)
 * @param install_sigint_handler If true, install SIGINT handler (default: true)
 * 
 * @note If install_sigint_handler is true, Ctrl-C will automatically
 *       call shutdown(). Set to false if you want custom signal handling.
 * 
 * Example:
 * @code
 * int main(int argc, char** argv)
 * {
 *   robot::init(argc, argv, "my_node");
 *   // ... use robot system ...
 *   return 0;
 * }
 * @endcode
 */
void init(int& argc, char** argv, const std::string& node_name = "", bool install_sigint_handler = true);

/**
 * @brief Initialize the robot system without command line arguments
 * 
 * Simplified version of init() that doesn't require argc/argv.
 * 
 * @param node_name Name of the node (optional, for logging purposes)
 * @param install_sigint_handler If true, install SIGINT handler (default: true)
 */
void init(const std::string& node_name = "", bool install_sigint_handler = true);

namespace detail
{
  /**
   * @brief Internal signal handler for SIGINT
   * 
   * This is called automatically when SIGINT is received (Ctrl-C).
   * It calls shutdown() to gracefully shut down the system.
   */
  void sigintHandler(int sig);
}

} // namespace robot

#endif // ROBOT_INIT_H_INCLUDED