#ifndef ENGINE_H
#define ENGINE_H

#include <stdint.h>
#include <stdbool.h>

#define ANIMATION_60_FPS      (1000.0 / 60.0)

#define ANIMATION_ONCE        1
#define ANIMATION_INFINITY    UINT16_MAX

typedef struct Animation {
  void* from;
  void* to;

  uint16_t currentFrame;
  uint16_t frameCount;
  uint16_t framesPerSecond;

  uint16_t elapsed;
  uint16_t interval;

  uint16_t nth;
  uint16_t repeat;

  void (*render)(struct Animation*); // render function
  void (*complete)(struct Animation*); // on complete callback function
} Animation;

Animation* createAnimation(uint16_t frames,
                           double duration,
                           uint16_t repeat);
Animation* createAnimation60FPS(double duration, uint16_t repeat);

bool cancelAnimation(Animation* animation);

// render next frame
void engineNext(void);

#endif