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#include <zmq.h>
#include <assert.h>
#include <libgen.h>
#include <unistd.h>
#include <sys/stat.h>
#include <signal.h>
#include "utils.h"

#ifndef LOGGERS_DELAY
#define LOGGERS_DELAY 0
#endif

// Global:
char *__client;
char __logdir[STATIC_LEN];
char __regpower[STATIC_LEN];
int __loginterval;
unsigned char __stop=0;

void sighandler(int signo){
  if (signo == SIGINT){
    printf("Stopping...\n");
    __stop=1;
  }
}

void publish(int queue_id);

typedef struct record {
  time_t secs;
  long nsecs;
  uint16_t power;
} record;

typedef struct queue {
  int length;
  record records[RECORD_MAX];
} queue;

queue queues[RECORD_QUEUES];

int main (int argc, char *argv [])
{
  if(argc != 4){
    printf("Usage: %s <abslogdir> <client> <loginterval>",argv[0]);
    exit(1);
  }

  //----- Init global variables
  __client=argv[2];
  __loginterval=atoi(argv[3]);
  // __logdir:
  strcat(__logdir,argv[1]);
  strcat(__logdir,"/");
  strcat(__logdir,__client);
  // __regpower:
  strcat(__regpower,INA260_SYSFS);
  strcat(__regpower,"/");
  strcat(__regpower,__client);
  strcat(__regpower,"/");
  strcat(__regpower,INA260_POWER_REGISTER);

  //----- Sanity checks
  signal(SIGINT,sighandler);
  mkdirp(__logdir);
  if(__loginterval<MIN_INTERVAL){
    printf("Log interval is too small (min=%ds)\n",MIN_INTERVAL);
    exit(2);
  }
  if(FILE_EXISTS(__regpower)){
    printf("Logger cannot access to %s\n",__regpower);
    exit(3);
  }

  //----- Start logging
  printf("Logger started [client=%s,interval=%ds]\n",__client,__loginterval);

  FILE *regptr,*logptr;
  char logfilepath[STATIC_LEN]="";
  regptr=fopen("/home/loic/out.txt","r");
  char buffer[STATIC_LEN];
  int power;
  time_t interval;
  struct timespec power_ts;
  int queue_id=0;

  while(!__stop){
    interval=INTERVAL(__loginterval);
    // Log current interval
    queue_id=queue_id>=RECORD_QUEUES ? 0 : queue_id+1;
    int record=0;
    while((TIMESTAMP()-interval)<__loginterval){
      if(__stop)
        break;
      if(record < RECORD_MAX){
        // Read power:
        fgets(buffer,STATIC_LEN,regptr);
        // Get power measurement timestamp:
        clock_gettime(CLOCK_REALTIME,&power_ts);
        queues[queue_id].records[record].secs=power_ts.tv_sec;
        queues[queue_id].records[record].nsecs=power_ts.tv_nsec;
        queues[queue_id].records[record].power=atoi(buffer);
        // Reset power register file:
        fseek(regptr,0,SEEK_SET);
  #if LOGGERS_DELAY > 0
        usleep(LOGGERS_DELAY*1000);
  #endif
        printf("Tick\n"); fflush(stdout);
        record++;
      } else {
        printf("Queue overflow, RECORD_MAX must be increase!! n=%d\n",record);
      }
    }
    queues[queue_id].length=record;
    publish(queue_id);
  }

  fclose(regptr);
  return 0;
}


void publish(int queue_id){
  for(int i=0;i<queues[queue_id].length;i++){
    printf("%d,%ld,%d\n",queues[queue_id].records[i].secs,queues[queue_id].records[i].nsecs,queues[queue_id].records[i].power);
  fflush(stdout);
  }
}