<?php

require_once("config.php");
require_once("ampy.inc.php");

ampy_flush_rrd_daemon();

$info=rrd_lastupdate(RRDFILE);
if ($info === FALSE)
	$result=[
		'last_update' => 'unknown',
		'watts' => 'unknown',
		'error' => rrd_error(),
	];
else
	$result=[
		'last_update' => $info['last_update'],
		'watts' => (double)$info['data'][0]
	];

$result['counter'] = ampy_get_counter();

header("Content-Type: text/json");
echo(json_encode($result));
?>