#ifndef __KERNEL_DEVICES_KEYBOARD_H__
# define __KERNEL_DEVICES_KEYBOARD_H__

#include <stddef.h>
#include <stdint.h>
#include <sys/types.h>

#define KEYCODE_GEN(row, column) \
	(((row & 0x0f) << 4) | ((column & 0x0f) << 0))

struct keycache_s
{
	uint8_t keycode;
	uint8_t key_frame;
	uint32_t counter;
	struct keycache_s *next;
};

typedef enum key_e
{
	KEY_F1		= 0x41,
	KEY_F2		= 0x42,
	KEY_F3		= 0x43,
	KEY_F4		= 0x44,
	KEY_F5		= 0x45,
	KEY_F6		= 0x46,

	KEY_SHIFT	= 0x49,	
	KEY_OPTN	= 0x4a,
	KEY_VARS	= 0x4b,
	KEY_MENU	= 0x4c,
	KEY_LEFT	= 0x4d,
	KEY_UP		= 0x4e,

	KEY_ALPHA	= 0x31,	
	KEY_SQUARE	= 0x32,
	KEY_POWER	= 0x33,
	KEY_EXIT	= 0x34,
	KEY_DOWN	= 0x35,
	KEY_RIGHT	= 0x36,

	KEY_XOT		= 0x39,
	KEY_LOG		= 0x3a,
	KEY_LN		= 0x3b,
	KEY_SIN		= 0x3c,
	KEY_COS		= 0x3d,
	KEY_TAN		= 0x3e,

	KEY_FRAC	= 0x21,
	KEY_FD		= 0x22,
	KEY_LEFTP	= 0x23,
	KEY_RIGHTP	= 0x24,
	KEY_COMMA	= 0x25,
	KEY_ARROW	= 0x26,

	KEY_7		= 0x29,
	KEY_8		= 0x2a,
	KEY_9		= 0x2b,
	KEY_DEL		= 0x2c,

	KEY_4		= 0x11,
	KEY_5		= 0x12,
	KEY_6		= 0x13,
	KEY_MUL		= 0x14,
	KEY_DIV		= 0x15,

	KEY_1		= 0x19,
	KEY_2		= 0x1a,
	KEY_3		= 0x1b,
	KEY_PLUS	= 0x1c,
	KEY_MINUS	= 0x1d,

	KEY_0		= 0x01,
	KEY_DOT		= 0x02,
	KEY_EXP		= 0x03,
	KEY_NEG		= 0x04,
	KEY_EXE		= 0x05,

	KEY_UNUSED	= 0xff
} key_t;

// Primitives
extern int keyboard_open(void);
extern ssize_t keyboard_read(void *buffer, size_t count);
extern int keyboard_close(void);

// Helpers
extern void keyboard_wait_event(void);

#endif /*__KERNEL_DEVICES_KEYBOARD_H__*/