#pragma once

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

#define KEYBOARD_INTERRUPT_BUF_CAP 100

typedef struct {
  volatile uint32_t len;
  uint8_t *buf;

  uint32_t copy_len;
  uint8_t *copy_buf;
  uint8_t copy_pressed[16];
} keyboard_interrupt_shared_t;

#define KEYCODE_SHIFT 42
#define KEYCODE_ENTER 28
#define KEYCODE_BACKSPACE 14

/* decoding */
static const char keysym_mapped_ascii_lower[] = {
  0  , 0  , '1', '2', '3', '4', '5', '6',
  '7', '8', '9', '0', '-', '=', 0  , 0  , 'q', 'w', 'e', 'r', 't', 'y',
  'u', 'i', 'o', 'p', '[', ']', '\n', 0  , 'a', 's', 'd', 'f', 'g',
  'h', 'j', 'k', 'l', ';', '\'', '`', 0  , '\\', 'z', 'x', 'c', 'v',
  'b', 'n', 'm', ',', '.', '/', 0  , 0  , 0  , ' ',
};

static const char keysym_mapped_ascii_upper[] = {
  0  , 0  , '!', '@', '#', '$', '%', '^',
  '&', '*', '(', ')', '_', '+', 0  , 0  , 'Q', 'W', 'E', 'R', 'T', 'Y',
  'U', 'I', 'O', 'P', '{', '}', '\n', 0  , 'A', 'S', 'D', 'F', 'G',
  'H', 'J', 'K', 'L', ':', '"', '~', 0  , '\\', 'Z', 'X', 'C', 'V',
  'B', 'N', 'M', '<', '>', '?'  /* an actual question mark */, 0  , 0  , 0  , ' ',
};


extern keyboard_interrupt_shared_t kbd_state_shrd;

void init_keyboard();

uint8_t kbd_take_from_copy_buffer();
bool kbd_can_take_from_copy_buffer();
bool kbd_is_pressed(uint8_t code);