<?php

use LibreNMS\Config;

$dest = device_by_id_cache($vars['dest']);

// This is my translation of Smokeping's graphing.
// Thanks to Bill Fenner for Perl->Human translation:>
$scale_min = 0;
$scale_rigid = true;

require 'includes/html/graphs/common.inc.php';
require 'includes/html/graphs/device/smokeping_common.inc.php';

$i = 0;
$pings = Config::get('smokeping.pings');
$iter = 0;
$colourset = 'mixed';

if ($width > '500') {
    $descr_len = 18;
} else {
    $descr_len = (12 + round(($width - 275) / 8));
}

if ($width > '500') {
    $rrd_options .= " COMMENT:'" . substr(str_pad($unit_text, ($descr_len + 5)), 0, ($descr_len + 5)) . " RTT      Loss    SDev   RTT\:SDev                              \l'";
} else {
    $rrd_options .= " COMMENT:'" . substr(str_pad($unit_text, ($descr_len + 5)), 0, ($descr_len + 5)) . " RTT      Loss    SDev   RTT\:SDev                              \l'";
}

$filename_dir = generate_smokeping_file($device);
if ($device['hostname'] == Config::get('own_hostname')) {
    $filename = $filename_dir . $dest['hostname'] . '.rrd';
    if (! Rrd::checkRrdExists($filename)) {
        // Try with dots in hostname replaced by underscores
        $filename = $filename_dir . str_replace('.', '_', $dest['hostname']) . '.rrd';
    }
} else {
    $filename = $filename_dir . $dest['hostname'] . '~' . $device['hostname'] . '.rrd';
    if (! Rrd::checkRrdExists($filename)) {
        // Try with dots in hostname replaced by underscores
        $filename = $filename_dir . str_replace('.', '_', $dest['hostname']) . '~' . $device['hostname'] . '.rrd';
    }
}

if (! Config::has("graph_colours.$colourset.$iter")) {
    $iter = 0;
}

$colour = Config::get("graph_colours.$colourset.$iter");
  $iter++;

  $descr = \LibreNMS\Data\Store\Rrd::fixedSafeDescr($source, $descr_len);

  $rrd_options .= " DEF:median$i=" . $filename . ':median:AVERAGE ';
  $rrd_options .= " DEF:loss$i=" . $filename . ':loss:AVERAGE';
  $rrd_options .= " CDEF:ploss$i=loss$i,$pings,/,100,*";
  $rrd_options .= " CDEF:dm$i=median$i";
// $rrd_options .= " CDEF:dm$i=median$i,0,".$max->{$start}.",LIMIT";
  // start emulate Smokeping::calc_stddev
foreach (range(1, $pings) as $p) {
    $rrd_options .= ' DEF:pin' . $i . 'p' . $p . '=' . $filename . ':ping' . $p . ':AVERAGE';
    $rrd_options .= ' CDEF:p' . $i . 'p' . $p . '=pin' . $i . 'p' . $p . ',UN,0,pin' . $i . 'p' . $p . ',IF';
}

  unset($pings_options, $m_options, $sdev_options);

foreach (range(2, $pings) as $p) {
    $pings_options .= ',p' . $i . 'p' . $p . ',UN,+';
    $m_options .= ',p' . $i . 'p' . $p . ',+';
    $sdev_options .= ',p' . $i . 'p' . $p . ',m' . $i . ',-,DUP,*,+';
}

  $rrd_options .= ' CDEF:pings' . $i . '=' . $pings . ',p' . $i . 'p1,UN' . $pings_options . ',-';
  $rrd_options .= ' CDEF:m' . $i . '=p' . $i . 'p1' . $m_options . ',pings' . $i . ',/';
  $rrd_options .= ' CDEF:sdev' . $i . '=p' . $i . 'p1,m' . $i . ',-,DUP,*' . $sdev_options . ',pings' . $i . ',/,SQRT';
  // end emulate Smokeping::calc_stddev
  $rrd_options .= " CDEF:dmlow$i=dm$i,sdev$i,2,/,-";
  $rrd_options .= " CDEF:s2d$i=sdev$i";
  $rrd_options .= " AREA:dmlow$i";
  $rrd_options .= " AREA:s2d$i#" . $colour . '30::STACK';
  $rrd_options .= " LINE1:dm$i#" . $colour . ":'$descr'";

// $rrd_options .= " LINE1:sdev$i#000000:$descr";
  $rrd_options .= " VDEF:avmed$i=median$i,AVERAGE";
  $rrd_options .= " VDEF:avsd$i=sdev$i,AVERAGE";
  $rrd_options .= " CDEF:msr$i=median$i,POP,avmed$i,avsd$i,/";
  $rrd_options .= " VDEF:avmsr$i=msr$i,AVERAGE";

  $rrd_options .= " GPRINT:avmed$i:'%5.1lf%ss'";
  $rrd_options .= " GPRINT:ploss$i:AVERAGE:'%5.1lf%%'";

  $rrd_options .= " GPRINT:avsd$i:'%5.1lf%Ss'";
  $rrd_options .= " GPRINT:avmsr$i:'%5.1lf%s\\l'";

  $i++;