<?php

require_once 'conf/common.inc.php';
require_once 'inc/functions.inc.php';
require_once 'inc/collectd.inc.php';

$plugin = GET('p');
$type = GET('t');
$width = GET('x') ? filter_var(GET('x'), FILTER_VALIDATE_INT, array(
	'min_range' => 10,
	'max_range' => $CONFIG['max-width']
)) : $CONFIG['width'];
$height = GET('y') ? filter_var(GET('y'), FILTER_VALIDATE_INT, array(
	'min_range' => 10,
	'max_range' => $CONFIG['max-height']
)) : $CONFIG['height'];

if ($width === NULL || $height === NULL) {
	error_log(sprintf('Invalid image dimension, x="%s", y="%s"',
		urlencode(GET('x')),
		urlencode(GET('y'))
	));
	error_image();
}

if (GET('h') === NULL) {
	error_image();
}

$typesdb = parse_typesdb_file($CONFIG['typesdb']);

if ($plugin == 'aggregation') {
	$aggr = true;
	$pi = explode("-", GET('pi'), 2);
	$plugin = GET('p', $pi[0]);
}

# plugin json
if(function_exists('json_decode'))
{
	$plugin_json = null;
	if (file_exists('plugin/'.$plugin.'.json')) {
		$json = file_get_contents('plugin/'.$plugin.'.json');
		$plugin_json = json_decode($json, true);

		if (is_null($plugin_json))
			error_log('CGP Error: invalid json in plugin/'.$plugin.'.json');
	}
	if (file_exists('plugin/local/'.$plugin.'.json')) {
		$json = file_get_contents('plugin/local/'.$plugin.'.json');
		$plugin_json_local = json_decode($json, true);

		if (is_null($plugin_json_local))
			error_log('CGP Error: invalid json in plugin/local/'.$plugin.'.json');

		if (is_array($plugin_json)) {
			$plugin_json = array_replace_recursive($plugin_json, $plugin_json_local);
		} else {
			$plugin_json = $plugin_json_local;
		}
	}
}

if (!isset($plugin_json[$type]['type']))
	$plugin_json[$type]['type'] = 'default';

switch ($plugin_json[$type]['type']) {
	case 'stacked':
		require_once 'type/GenericStacked.class.php';
		$obj = new Type_GenericStacked($CONFIG, GET());
		break;
	case 'io':
		require_once 'type/GenericIO.class.php';
		$obj = new Type_GenericIO($CONFIG, GET());
		break;
	case 'uptime':
		require_once 'type/Uptime.class.php';
		$obj = new Type_Uptime($CONFIG, GET());
		break;
	default:
		require_once 'type/Default.class.php';
		$obj = new Type_Default($CONFIG, GET());
		break;
}

# in case of aggregation, reset pi after initializing $obj to get a correct title
if (isset($aggr) && $aggr) {
	$_GET['pi'] = GET('pi', $pi[1]);
}

if (isset($typesdb[$type])) {
	$obj->data_sources = array();
	foreach ($typesdb[$type] as $ds => $property) {
		$obj->data_sources[] = $ds;
	}
}

if (isset($plugin_json[$type]['legend'])) {
	$obj->order = array();
	foreach ($plugin_json[$type]['legend'] as $rrd => $property) {
		$obj->order[] = $rrd;
		$obj->legend[$rrd] = isset($property['name']) ? $property['name'] : $rrd;
		if (isset($property['color']))
			$obj->colors[$rrd] = $property['color'];
	}
}

if (isset($plugin_json[$type]['title'])) {
	$obj->rrd_title = str_replace(
		array('{{PI}}', '{{TI}}', '{{HOST}}'),
		array(GET('pi'), GET('ti'), GET('h')),
		$plugin_json[$type]['title']
	);
}

if (isset($plugin_json[$type]['vertical'])) {
	$obj->rrd_vertical = $plugin_json[$type]['vertical'];
	$obj->rrd_vertical = str_replace('{{ND}}', ucfirst($CONFIG['network_datasize']), $obj->rrd_vertical);
}

if (isset($plugin_json[$type]['rrdtool_opts'])) {
	$rrdtool_extra_opts = $plugin_json[$type]['rrdtool_opts'];
	# compatibility with plugins which specify arguments as string
	if (is_string($rrdtool_extra_opts)) {
		$rrdtool_extra_opts = explode(' ', $rrdtool_extra_opts);
	}

	$obj->rrdtool_opts = array_merge(
		$obj->rrdtool_opts,
		$rrdtool_extra_opts
	);
}

if (isset($plugin_json[$type]['datasize']) and $plugin_json[$type]['datasize'])
	$obj->scale = $CONFIG['network_datasize'] == 'bits' ? 8 : 1;

if ($type == 'if_octets')
	$obj->percentile = $CONFIG['percentile'];

if (isset($plugin_json[$type]['scale']))
	$obj->scale = $plugin_json[$type]['scale'];

if (isset($plugin_json[$type]['base']))
	$obj->base = $plugin_json[$type]['base'];

if (isset($plugin_json[$type]['legend_format']))
	$obj->rrd_format = $plugin_json[$type]['legend_format'];

$obj->rrd_graph();