#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include <unistd.h>

#include "log.h"
#include "utils.h"

#include "config.h"

char
*battery_percent(void)
{
  char *r, c, *d;
  int i;
  FILE *f;

  /* open up the battery capacity for reading */
  d = concat(battery_status_path, "/capacity");
  f = fopen(d, "r");
  if (!f) {
    log_fatal("battery directory does not exist");
    free(d);
    return NULL;
  }
  free(d);

  /* create enough space for the battery percentage */
  r = calloc(4, sizeof(char));

  /* read in the battery percentage */
  i = 0;
  while ((c = getc(f)) && i < 4) {
    /* make sure to replace the newline with a string terminator */
    if (c == '\n') {
      r[i] = '\0';
      break;
    }
    r[i] = c;
    i++;
  }

  fclose(f);
  return r;
}

bool
plugged_in(char *fn)
{
  FILE *f;
  char buf[1];

  f = fopen(fn, "r");
  if (read(fileno(f), buf, 1) < 0) {
    return -1;
  }
  fclose(f);

  return buf[0] - '0';
}