#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <string.h>
#include "linux_nfc_api.h"
#include <linux/i2c-dev.h>
#include <signal.h>
#include <stdlib.h>
#include <time.h>
#include <syslog.h>
#include <pthread.h>

/* ---------------------------------------- */
/* ---------------------------------------- */


int running = 1;

struct sigaction sigIntHandler;
pthread_cond_t condition = PTHREAD_COND_INITIALIZER;
pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;

nfcTagCallback_t g_TagCB;

/* ---------------------------------------- */
/* ---------------------------------------- */
void onTagArrival(nfc_tag_info_t *pTagInfo){
    syslog (LOG_INFO, "Tag Detected");
    for(int i = 0; i < (*pTagInfo).uid_length; i++){
        printf("%02X", (unsigned char) (*pTagInfo).uid[i]);
    }
    printf("\n");
    pthread_cond_signal(&condition);
}

/* ---------------------------------------- */
/* ---------------------------------------- */
void onTagDeparture(void){
    syslog (LOG_INFO, "Tag leaved");
}

/* ---------------------------------------- */
/* ---------------------------------------- */
void signal_callback_handler(sig_atomic_t signum) {
    syslog (LOG_INFO, "Receive stop handler");
    running = 0;
    pthread_cond_signal(&condition);
}

/* ---------------------------------------- */
int main(int argc, char ** argv) {


    signal(SIGINT, signal_callback_handler);
    signal(SIGTERM, signal_callback_handler);

    openlog ("nfc", LOG_CONS | LOG_NDELAY, LOG_LOCAL1);

    syslog (LOG_INFO, "Starting Handler");
    g_TagCB.onTagArrival = onTagArrival;
    g_TagCB.onTagDeparture = onTagDeparture;

    syslog (LOG_INFO, "Initializing NFC");
    nfcManager_doInitialize();

    syslog (LOG_INFO, "Registering Callback");
    nfcManager_registerTagCallback(&g_TagCB);

    syslog (LOG_INFO, "Enable Card Discovery");
    nfcManager_enableDiscovery(DEFAULT_NFA_TECH_MASK, 0x01, 0, 0);

    syslog (LOG_INFO, "Waiting for TAG");
    do{
       pthread_cond_wait(&condition, &mutex);
    }
    while(running == 1);

    syslog (LOG_INFO, "Deinitialize driver");
    nfcManager_doDeinitialize();
    syslog (LOG_INFO, "Driver ends");

    closelog();

}
/* ---------------------------------------- */
/* ---------------------------------------- */