#include <stdlib.h>
#include <stdint.h>
#include <inttypes.h>

#ifndef NFCOMMANDER_VERSION
        #define NFCOMMANDER_VERSION "v0.1-dev"
#endif

typedef enum {
	tag_unset,
	tag_mifare1,
	tag_ntag,
	tag_desfire,
	tag_ultralight,
	tag_ultralightc
} nfc_tag_t;

#define FLAG_TAG_DATA_VALID 1
#define FLAG_TAG_UNPROGRAMMED 2
#define FLAG_TAG_LOCKED 4
#define TAG_STATUS_FLAGS ((FLAG_TAG_DATA_VALID | FLAG_TAG_UNPROGRAMMED | FLAG_TAG_LOCKED))

typedef struct {
	//core identifying properties
	nfc_tag_t type;
	uint8_t uid_length;
	uint8_t uid[10];
} nfc_tag_info_t;

typedef int (*reader_plugin_init)(void);
typedef int (*reader_plugin_handle)(int fd);
typedef int (*reader_plugin_scan)(void);

typedef enum {
	system_control,
	system_reader,
	system_command
} notification_target_t;

int core_manage_fd(int fd, int manage, notification_target_t system);

/*
 * This API is to be called by reader backends to indicate presence of a tag.
 * This can be done as soon as the UID of the tag has been read (ie. before
 * reading EEPROM contents) to check whether the card has already been read.
 * If this API returns 1, a full read is requested and the nfc_tag_info_t should
 * be submitted again with the data fully read.
 */
#define TAG_READ_REQUESTED 1
int reader_tag_present(uint8_t flags, nfc_tag_info_t tag);