<?php

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

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

$i         = 0;
$pings     = $config['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'";
}

foreach ($smokeping_files[$direction][$device['hostname']] as $source => $filename) {
    if (!isset($config['graph_colours'][$colourset][$iter])) {
        $iter = 0;
    }

    $colour = $config['graph_colours'][$colourset][$iter];
    $iter++;

    $descr = rrdtool_escape($source, $descr_len);

    $filename = generate_smokeping_file($device, $filename);
    $rrd_options .= " DEF:median$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++;
}//end foreach
