#pragma once
#include <stdint.h>
#include <stdbool.h>
#include <stddef.h>

/* ------------------------------------------------------------------ *
 * Generic input event types
 * ------------------------------------------------------------------ */
typedef enum {
    INPUT_EV_NONE = 0,
    INPUT_EV_KEY,        /* key press / release         */
    INPUT_EV_MOUSE_REL,  /* relative mouse movement     */
    INPUT_EV_MOUSE_BTN,  /* mouse button press/release  */
    INPUT_EV_MOUSE_WHEEL,
} input_ev_type_t;

typedef struct {
    input_ev_type_t type;

    union {
        /* INPUT_EV_KEY */
        struct {
            uint8_t scancode;  /* raw set-1 scancode (break bit cleared) */
            char    ascii;     /* 0 if non-printable                      */
            bool    pressed;
        } key;

        /* INPUT_EV_MOUSE_REL */
        struct {
            int16_t dx, dy;
        } rel;

        /* INPUT_EV_MOUSE_BTN */
        struct {
            uint8_t button;   /* 0=left 1=right 2=middle */
            bool    pressed;
        } btn;

        /* INPUT_EV_MOUSE_WHEEL */
        struct {
            int8_t delta;
        } wheel;
    };
} input_event_t;

/* ------------------------------------------------------------------ *
 * Public API
 * ------------------------------------------------------------------ */
void input_init(void);

/* Called by drivers (PS/2, USB HID, …) to publish events */
void input_push_key(uint8_t scancode, char ascii, bool pressed);
void input_push_mouse_rel(int16_t dx, int16_t dy);
void input_push_mouse_btn(uint8_t button, bool pressed);
void input_push_mouse_wheel(int8_t delta);

void input_push_char(char c);
int  input_read_console(void *buf, size_t len);

/* Consumer API */
bool input_poll(input_event_t *out);  /* non-blocking; false if empty */
bool input_has_event(void);

/* VFS helpers — call after VFS is ready */
void input_register_devnodes(void);   /* creates /dev/input/event0 */