#ifndef _timer_H_
#define _timer_H_

#include <cstdint>
#include <mutex>

namespace sc {

    class timer {
        static uint64_t next_id;
        static std::mutex mutex;

        uint64_t _id {};
        double _time {};
        bool _repeat {};
        void (*_expired_func)(const timer& self);
        mutable void* _context {};
        timer_t _tid;

        public:
            timer(double time,
                  bool repeat,
                  void(*expired_func)(const timer&),
                  void* context = nullptr);
            ~timer();

            uint64_t id() const { return _id; }
            double time() const { return _time; }
            bool repeat() const { return _repeat; }
            void* context() const { return _context; }

            bool is_armed() const;
            void time_left(struct itimerspec& cur_value) const;
            double time_left() const;

            void stop();
            void start();
            void start(double time, bool repeat);

        private:
            static void callback(union sigval);

            void setup_timer(double time, bool repeat);
    };

}

#endif // _timer_H_