#include "types.hpp"



typedef u16 KeyFlags;

enum Key : KeyFlags {
	A      = 0x0001,
	B      = 0x0002,
	Select = 0x0004,
	Start  = 0x0008,
	Right  = 0x0010,
	Left   = 0x0020,
	Up     = 0x0040,
	Down   = 0x0080,
	R      = 0x0100,
	L      = 0x0200,
};

constexpr KeyFlags KEY_MASK = 0x03FF;

volatile KeyFlags* const REG_KEYINPUT = reinterpret_cast<volatile KeyFlags*>(0x04000130);

static inline KeyFlags &keyflags_curr() {
	static KeyFlags keybits_curr = 0;
	return keybits_curr;
}

static inline KeyFlags &keyflags_prev() {
	static KeyFlags keybits_prev = 0;
	return keybits_prev;
}

static inline void keyflags_poll() {
	KeyFlags &prev = keyflags_prev();
	KeyFlags &curr = keyflags_curr();

	prev = curr;
	curr = ~*REG_KEYINPUT & KEY_MASK;
}

static inline bool key_is_down(Key key)  { return  keyflags_curr() & key; }
static inline bool key_is_up(Key key)    { return ~keyflags_curr() & key; }
static inline bool key_was_down(Key key) { return  keyflags_prev() & key; }
static inline bool key_was_up(Key key)   { return ~keyflags_prev() & key; }