/* This macro will be parsed as PHP code (see http://www.php.net)

The calculateshipping function is called every time a shipping calculation request is made by Shopify.

The function must return an array of available shipping options, otherwise no shipping options will be returned to your customers.
*/
function calculateshipping($DATA) {

    /* do not edit above this line */

    $_RATES = array();

	$w = 0;
	foreach ($DATA['items'] as $i) {
		$w += $i['quantity']*$i['grams']/1000;
	}

	//use cm and KG
	$packages = array(
		array('weight'=>$w, 'length'=>16, 'width'=>11, 'height'=>2),
	);

	//correios
	$CO = new CorreiosAPI('YOUR ADMIN CODE (OPTIONAL)','YOUR PASSWORD (OPTIONAL)');
	$CO->setOrigin(null,null,$DATA['origin']['postal_code'],'BR');
	$CO->setDestination(null,null,$DATA['destination']['postal_code'],'BR');
	$r = $CO->getRate($packages);
	if ($r) {
		foreach ($r as $_r) {
			$_RATES[] = array(
				"service_name" => $_r['name'].' ('.$_r['businessdays'].' Business Days)',
				"service_code" => $_r['code'],
				"total_price" => $_r['amount']*100, //in cents
				"currency" => "BRL",
			);
		}
	}

	return $_RATES;

    /* do not edit below this line */

}