#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include "netif.h"
#include "tools.h"
#include "../config.h"

#ifndef NETIF_BASEDIR
  #define NETIF_BASEDIR "/sys/class/net/"
#endif


void status_netif(char *ifname)
{
  char ifpath[256];
  int ifpathlen;

  char stline[16];
  ssize_t stlen;

  double ifsum = 0.0;
  int ifsumpower;


  /* Prepare path */
  ifpathlen = sizeof(NETIF_BASEDIR) - 1 + strlen(ifname);
  if (ifpathlen + 1 + sizeof("/statistics/rx_bytes") >= sizeof(ifpath)) {
    statusError("status_netif",
                "ifpath buffer too small",
                ifname);
    return;
  }
  strcpy(ifpath, NETIF_BASEDIR);
  strcat(ifpath, ifname);


  /* Is the interface up? */
  if (access(ifpath, F_OK)) {
    //printf(" ^fg(grey)[%s] ", ifname);
    return;
  }


  strcpy(&ifpath[ifpathlen], "/carrier");
  stlen = fileRead(stline, sizeof(stline), ifpath);
  if (stlen > 0) {
    if (stline[0] == '1') {
      fputs("^fg(yellow)", stdout);
    } else {
      //fputs("^fg(red)", stdout);
      return;
    }
  } else {
    return;
  }

  strcpy(&ifpath[ifpathlen], "/statistics/rx_bytes");
  stlen = fileRead(stline, sizeof(stline), ifpath);
  if (stlen > 0) {
    ifsum = atof(stline);
  }

  strcpy(&ifpath[ifpathlen], "/statistics/tx_bytes");
  stlen = fileRead(stline, sizeof(stline), ifpath);
  if (stlen > 0) {
    ifsum += atof(stline);
  }


  for(ifsumpower = 0; ifsum >= 1024.0; ifsumpower++) {
    ifsum = ifsum / 1024;
  }

  printf(" %s: %.*f %c ", ifname,
                          ifsumpower ? ifsumpower - 1 : ifsumpower,
                          ifsum,
                          powerToChar(ifsumpower));
}