<?php

    if (strpos($_SERVER['REQUEST_URI'], "debug")) {
	$debug = "1";
	ini_set('display_errors', 1);
	ini_set('display_startup_errors', 1);
	ini_set('log_errors', 1);
	ini_set('error_reporting', E_ALL);
    } else {
	$debug = FALSE;
	ini_set('display_errors', 0);
	ini_set('display_startup_errors', 0);
	ini_set('log_errors', 0);
	ini_set('error_reporting', 0);
    }

    include("../includes/defaults.inc.php");
    include("../config.php");
    include("../includes/functions.php");
    include("includes/functions.inc.php");
    include("includes/authenticate.inc.php");
    if (!$_SESSION['authenticated']) { echo("unauthenticated"); exit; }
    require_once("includes/jpgraph/src/jpgraph.php");
    require_once("includes/jpgraph/src/jpgraph_line.php");
    require_once("includes/jpgraph/src/jpgraph_bar.php");
    require_once("includes/jpgraph/src/jpgraph_utils.inc.php");
    require_once("includes/jpgraph/src/jpgraph_date.php");

    if (is_numeric($_GET['bill_id'])) {
	if (bill_permitted($_GET['bill_id'])) {
	    $bill_id = $_GET['bill_id'];
	} else {
	    echo("Unauthorised Access Prohibited.");
	    exit;
	}
    } else {
	echo("Unauthorised Access Prohibited.");
	exit;
    }

    $start	= $_GET['from'];
    $end	= $_GET['to'];
    $xsize	= (is_numeric($_GET['x']) ? $_GET['x'] : "800" );
    $ysize	= (is_numeric($_GET['y']) ? $_GET['y'] : "250" );
//    $count	= (is_numeric($_GET['count']) ? $_GET['count'] : "0" );
//    $type	= (isset($_GET['type']) ? $_GET['type'] : "date" );
//    $dur	= $end - $start;
//    $datefrom	= date('Ymthis', $start);
//    $dateto	= date('Ymthis', $end);
    $imgtype	= (isset($_GET['imgtype']) ? $_GET['imgtype'] : "historical" );
    $imgbill	= (isset($_GET['imgbill']) ? $_GET['imgbill'] : false);
    $yaxistitle	= "Bytes";

    $in_data	  = array();
    $out_data	  = array();
    $tot_data	  = array();
    $allow_data	  = array();
    $ave_data	  = array();
    $overuse_data = array();
    $ticklabels	  = array();

    function humanReadable($value, $title = false, $max = false, $decimals = 3) {
	$suffix = array("Bytes", "Kilobytes", "Megabytes", "Gigabytes", "Terabytes", "Petabytes");
	$max = (($max == false) ? count($suffix) : $max);
	$i = 0;
	while($value >= 1024 && ($i < $max)) {
	    $value /= 1024;
	    $i++;
	}
	if ($title == "suffix") {
	    $tmp = $i;
	    $res = $suffix[$tmp];
	} elseif ($title == "count") {
	    $res = $i;
	} else {
	    $res = round($value, $decimals);
	}
	return $res;
    }

    function formatScale($value, $max, $decimal) {
	$res = array();
	foreach($value as $item) {
	    $tmp = humanReadable($item, false, $max, $decimal);
	    array_push($res, $tmp);
	}
	return $res;
    }

    if ($imgtype == "historical") {
	$i		= "0";
	foreach (dbFetchRows("SELECT * FROM `bill_history` WHERE `bill_id` = ? ORDER BY `bill_datefrom` LIMIT 12", array($bill_id)) as $data) {
	    $datefrom		= strftime("%e %b %Y", strtotime($data['bill_datefrom']));
	    $dateto		= strftime("%e %b %Y", strtotime($data['bill_dateto']));
	    $datelabel		= $datefrom."\n".$dateto;
	    $traf['in']		= round(substr(formatStorage($data['traf_in'] * 1024 * 1024), 0, -2));
	    $traf['out']	= round(substr(formatStorage($data['traf_out'] * 1024 * 1024), 0, -2));
	    $traf['total']	= round(substr(formatStorage($data['traf_total'] * 1024 * 1024), 0, -2));
	    if ($data['bill_type'] == "Quota") {
		$traf['allowed']= round(substr(formatStorage($data['bill_allowed'] * 1024 * 1024), 0, -2));
		$traf['overuse']= round(substr(formatStorage($data['bill_overuse'] * 1024 * 1024), 0, -2));
	    } else {
		$traf['allowed']= "0";
		$traf['overuse']= "0";
	    }
	    array_push($ticklabels, $datelabel);
	    array_push($in_data, $traf['in']);
	    array_push($out_data, $traf['out']);
	    array_push($tot_data, $traf['total']);
	    array_push($allow_data, $traf['allowed']);
	    array_push($overuse_data, $traf['overuse']);
	    $i++;
	    //print_r($data);
	}
	if ($i < 12) {
	    $y	= 12 - $i;
	    for ($x=0;$x<$y;$x++) {
		$allowed	= (($x == "0") ? $traf['allowed'] : "0" );
		array_push($in_data, "0");
		array_push($out_data, "0");
		array_push($tot_data, "0");
		array_push($allow_data, $allowed);
		array_push($overuse_data, "0");
		array_push($ticklabels, "");
	    }
	}
	$graph_name	= "Historical bandwidth over the last 12 billing periods";
    } else {
	$data		= array();
	$max		= 9999999999999999999999999999999999999999999;
	$min_data	= array("in"=>$max, "out"=>$max, "tot"=>$max);
	$average	= 0;
	if ($imgtype == "day") {
	    foreach(dbFetch("SELECT DISTINCT UNIX_TIMESTAMP(timestamp) as timestamp, SUM(delta) as traf_total, SUM(in_delta) as traf_in, SUM(out_delta) as traf_out FROM bill_data WHERE `bill_id` = ? AND `timestamp` >= FROM_UNIXTIME(?) AND `timestamp` <= FROM_UNIXTIME(?) GROUP BY DATE(timestamp) ORDER BY timestamp ASC", array($bill_id, $start, $end)) as $data) {
		$traf['in']	= (isset($data['traf_in']) ? $data['traf_in'] : 0);
		$traf['out']	= (isset($data['traf_out']) ? $data['traf_out'] : 0);
		$traf['total']	= (isset($data['traf_total']) ? $data['traf_total'] : 0);
		$datelabel	= strftime("%e\n%b", $data['timestamp']);
		array_push($ticklabels, $datelabel);
		array_push($in_data, $traf['in']);
		array_push($out_data, $traf['out']);
		array_push($tot_data, $traf['total']);
//		$min_data['in'] = (($traf['in'] < $min_data['in']) ? $traf['in'] : $min_data['in']);
//		$min_data['out']= (($traf['out'] < $min_data['out']) ? $traf['out'] : $min_data['out']);
//		$min_data['tot']= (($traf['total'] < $min_data['tot']) ? $traf['total'] : $min_data['tot']);
		$average += $data['traf_total'];
	    }
	    $min_data['in']	= min($in_data);
	    $min_data['out']	= min($out_data);
	    $min_data['tot']	= min($tot_data);
	    $ave_count		= count($tot_data);
	    if ($imgbill != false) {
		$days	= strftime("%e", date($end - $start)) - $ave_count - 1;
		for ($x=0;$x<$days;$x++) {
		    array_push($ticklabels, "");
		    array_push($in_data, 0);
		    array_push($out_data, 0);
		    array_push($tot_data, 0);
		}
	    }
	} elseif ($imgtype == "hour") {
	    foreach(dbFetch("SELECT DISTINCT UNIX_TIMESTAMP(timestamp) as timestamp, SUM(delta) as traf_total, SUM(in_delta) as traf_in, SUM(out_delta) as traf_out FROM bill_data WHERE `bill_id` = ? AND `timestamp` >= FROM_UNIXTIME(?) AND `timestamp` <= FROM_UNIXTIME(?) GROUP BY HOUR(timestamp) ORDER BY timestamp ASC", array($bill_id, $start, $end)) as $data) {
		$traf['in']	= (isset($data['traf_in']) ? $data['traf_in'] : 0);
		$traf['out']	= (isset($data['traf_out']) ? $data['traf_out'] : 0);
		$traf['total']	= (isset($data['traf_total']) ? $data['traf_total'] : 0);
		$datelabel	= strftime("%H:%M", $data['timestamp']);
		array_push($ticklabels, $datelabel);
		array_push($in_data, $traf['in']);
		array_push($out_data, $traf['out']);
		array_push($tot_data, $traf['total']);
//		$min_data['in'] = (($traf['in'] < $min_data['in']) ? $traf['in'] : $min_data['in']);
//		$min_data['out']= (($traf['out'] < $min_data['out']) ? $traf['out'] : $min_data['out']);
//		$min_data['tot']= (($traf['tot'] < $min_data['tot']) ? $traf['tot'] : $min_data['tot']);
		$average += $data['traf_total'];
	    }
	    $min_data['in']	= min($in_data);
	    $min_data['out']	= min($out_data);
	    $min_data['tot']	= min($tot_data);
	    $ave_count		= count($tot_data);
	}
	$decimal    = 0;
	$max        = min($min_data);
	$yaxistitle = humanReadable($max, "suffix");
	$max        = humanReadable($max, "count");
	$in_data    = formatScale($in_data, $max, $decimal);
	$out_data   = formatScale($out_data, $max, $decimal);
	$tot_data   = formatScale($tot_data, $max, $decimal);
	$average    = humanReadable(($average / $ave_count), false, $max, $decimal);
	for ($x=0;$x<=count($tot_data);$x++) {
	    array_push($ave_data, $average);
	}
	$graph_name	= date('M j g:ia', $start)." - ".date('M j g:ia', $end);
    }


    // Create the graph. These two calls are always required
    $graph = new Graph($xsize, $ysize, $graph_name);
    $graph->img->SetImgFormat("png");
    $graph->SetScale("textlin");
    $graph->title->Set("$graph_name");
    $graph->title->SetFont(FF_FONT2, FS_BOLD, 10);
    $graph->SetMarginColor("white");
    $graph->SetFrame(false);
    $graph->SetMargin("75", "30", "30", "65");
    $graph->legend->SetFont(FF_FONT1, FS_NORMAL);
    $graph->legend->SetLayout(LEGEND_HOR);
    $graph->legend->Pos("0.52", "0.91", "center");

    $graph->xaxis->SetFont(FF_FONT1, FS_BOLD);
    $graph->xaxis->SetPos('min');
    $graph->xaxis->SetTitleMargin(30);
    $graph->xaxis->SetTickLabels($ticklabels);
    $graph->xgrid->Show(true,true);
    $graph->xgrid->SetColor('#e0e0e0','#efefef');

    $graph->yaxis->SetFont(FF_FONT1);
    $graph->yaxis->SetTitleMargin(50);
    $graph->yaxis->title->SetFont(FF_FONT1, FS_NORMAL, 10);
    $graph->yaxis->title->Set($yaxistitle);
    $graph->ygrid->SetFill(true,'#EFEFEF@0.5','#FFFFFF@0.5');


    // Create the bar plots
    $barplot_tot = new BarPlot($tot_data);
    $barplot_tot->SetLegend("Traffic total");
    $barplot_tot->SetColor("#d5d5d5");
    $barplot_tot->SetFillColor("#d5d5d5@0.5");

    $barplot_in = new BarPlot($in_data);
    $barplot_in->SetLegend("Traffic In");
    $barplot_in->SetColor('darkgreen');
    $barplot_in->SetFillColor('lightgreen@0.4');
    $barplot_in->SetWeight(1);

    $barplot_out = new BarPlot($out_data);
    $barplot_out->SetLegend("Traffic Out");
    $barplot_out->SetColor('darkblue');
    $barplot_out->SetFillColor('lightblue@0.4');
    $barplot_out->SetWeight(1);

    if ($imgtype == "historical") {
	$barplot_over = new BarPlot($overuse_data);
	$barplot_over->SetLegend("Traffic Overusage");
	$barplot_over->SetColor('darkred');
	$barplot_over->SetFillColor('lightred@0.4');
	$barplot_over->SetWeight(1);

	$lineplot_allow = new LinePlot($allow_data);
	$lineplot_allow->SetLegend("Traffic Allowed");
	$lineplot_allow->SetColor('black');
	$lineplot_allow->SetWeight(1);

	$gbplot = new GroupBarPlot(array($barplot_in, $barplot_out, $barplot_tot, $barplot_over));
    } else {
	$lineplot_allow = new LinePlot($ave_data);
	$lineplot_allow->SetLegend("Average per day");
	$lineplot_allow->SetColor('black');
	$lineplot_allow->SetWeight(1);

	$gbplot = new GroupBarPlot(array($barplot_in, $barplot_out, $barplot_tot));
    }

    $graph->Add($gbplot);
    $graph->Add($lineplot_allow);


    // Display the graph
    $graph->Stroke();

?>