#ifndef LOOPER_HH
#define LOOPER_HH

#include <functional>
#include <memory>

class Logger;

class Looper {
public:
  constexpr static uint8_t EVENT_READ = 1;
  constexpr static uint8_t EVENT_WRITE = 2;
  constexpr static uint8_t EVENT_ERROR = 4;

  virtual ~Looper() = default;

  static std::unique_ptr<Looper> create();

  virtual void add(int fd, uint8_t events,
                   std::function<void(uint8_t)> callback) = 0;
  virtual void update(int fd, uint8_t events) = 0;
  virtual void remove(int fd) = 0;

  // Returned id is never 0
  virtual uint32_t schedule(double delay,
                            std::function<void(uint32_t)> callback) = 0;
  virtual void cancel(uint32_t id) = 0;

  virtual bool run(Logger* logger) = 0;
  virtual void quit() = 0;

protected:
  Looper() = default;
  Looper(Looper const&) = delete;
  Looper& operator=(Looper const&) = delete;
};

#endif  // LOOPER_HH