#pragma once

#include <stdint.h>

struct count_flop_t {
  int8_t count;
  uint8_t flop;
  uint8_t das;
  uint8_t repeat;
};

struct input_t {
  count_flop_t right;
  count_flop_t left;
  count_flop_t down;
  count_flop_t up;
  count_flop_t start;
  count_flop_t a;
  count_flop_t b;
  count_flop_t c;
  count_flop_t r;
  count_flop_t x;
  count_flop_t y;
  count_flop_t z;
  count_flop_t l;
};

void digital_callback(uint8_t fsm_state, uint8_t data);

extern input_t input;

constexpr int input_arr = 1;
constexpr int input_das = 1;
constexpr int input_debounce = 2;

static constexpr inline int32_t
input_flopped(count_flop_t& button)
{
  if (button.count == input_debounce && button.flop == 0) {
    button.flop = 1;
    return 1;
  } else if (button.flop == 1 && button.das == input_das && button.repeat == 0) {
    button.repeat = 1;
    button.das = 0;
    return 2;
  } else if (button.repeat == 1 && (button.das == input_arr)) {
    button.das = 0;
    return 2;
  } else {
    return 0;
  }
}

struct event {
  static inline bool cursor_left()  { return input_flopped(input.left ) >= 1; }
  static inline bool cursor_right() { return input_flopped(input.right) >= 1; }
  static inline bool cursor_up()    { return input_flopped(input.up   ) >= 1; }
  static inline bool cursor_down()  { return input_flopped(input.down ) >= 1; }
  static inline bool button_a()     { return input_flopped(input.a ) == 1; }
};