/*
 * keyd - A key remapping daemon.
 *
 * © 2019 Raheman Vaiya (see also: LICENSE).
 */
#ifndef DEVICE_H
#define DEVICE_H

#include <stdint.h>

#define CAP_MOUSE	0x1
#define CAP_MOUSE_ABS	0x2
#define CAP_KEYBOARD	0x4
#define CAP_KEY		0x8 // Can emit keys, but is not necessarily a keyboard

#define MAX_DEVICES	64

struct device {
	/*
	 * A file descriptor that can be used to monitor events subsequently read with
	 * device_read_event().
	 */
	int fd;

	uint8_t grabbed;
	uint8_t capabilities;
	uint8_t is_virtual;

	char id[64];
	char name[64];
	char path[256];

	/* Internal. */
	uint32_t _maxx;
	uint32_t _maxy;
	uint32_t _minx;
	uint32_t _miny;

	uint32_t _pending_rel_x;
	uint32_t _pending_rel_y;

	/* Reserved for the user. */
	void *data;
};

struct device_event {
	enum {
		DEV_KEY,
		DEV_LED,

		DEV_MOUSE_MOVE,
		/* All absolute values are relative to a resolution of 1024x1024. */
		DEV_MOUSE_MOVE_ABS,
		DEV_MOUSE_SCROLL,

		DEV_REMOVED,
	} type;

	uint8_t code;
	uint8_t pressed;

	int32_t x;
	int32_t y;
};


struct device_event *device_read_event(struct device *dev);

int device_scan(struct device devices[MAX_DEVICES]);
int device_grab(struct device *dev);
int device_ungrab(struct device *dev);

int devmon_create();
int devmon_read_device(int fd, struct device *dev);
void device_set_led(const struct device *dev, int led, int state);

#endif