#pragma once

#include "coordinates.hpp"

struct actor_t
{
  enum direction {
    up,
    down,
    left,
    right,
  };

  world_t world;
  enum direction facing;
  bool moving;
  bool collision;
  uint8_t frame;
  uint8_t cycle;

  constexpr inline offset_t offset()
  {
    if (collision) {
      return {0, 0};
    } else {
      switch (facing) {
      case left:
	return {-frame, 0};
      case right:
	return {frame, 0};
      case up:
	return {0, -frame};
      case down:
	return {0, frame};
      default:
	return {0, 0};
      }
    }
  }

  // call tick() before move()
  constexpr inline void tick()
  {
    if (!moving) return;

    frame = frame + 1;
    if (frame == 16) {
      cycle += 1;
      frame = 0;
      if (!collision) {
	switch (facing) {
	case left:  world.x--; break;
	case right: world.x++; break;
	case up:    world.y--; break;
	case down:  world.y++; break;
	}
      }
      moving = false;
    }
  }

  constexpr inline void move(enum direction dir,
			     bool collision)
  {
    /*
      m 1 . 2 . 3 . 4 .
      | - | - | - | - |

     */

    if (!(this->collision) && moving) return;
    if (!collision)
      frame = 0;
    facing = dir;
    moving = true;
    this->collision = collision;
  }
};