/* 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();

	$_UPS_CLIENT_ID = "YOUR_CLIENT_ID";
	$_UPS_CLIENT_SECRET = "YOUR_CLIENT_SECRET";
	$_UPS_ACCOUNT = "YOUR_ACCOUNT_NUMBER"; //set to null if you DON'T want to use negotiated rates

	$emptyBoxWeight = 0; //in lb

	$defaultBoxL = 8.25;
	$defaultBoxW = 6;
	$defaultBoxH = 4;

	$w = 0;
	foreach ($DATA['items'] as $i) {
		$w += $i['quantity']*round($i['grams']/1000*2.20462,2);
	}

	$isresidential = true;
	if ($DATA['destination']['company_name'] !== null && $DATA['destination']['company_name'] != '') $isresidential = false;

	//use UPS
	if ($w < 1) $w = 1;
	$serviceCode = '92'; //surepost service code, 92,93,94,95 are valid codes

	$packages = array(
		array('weight'=>($w+$emptyBoxWeight), 'length'=>$defaultBoxL, 'width'=>$defaultBoxW, 'height'=>$defaultBoxH),
	);

	$ups = new UPSRESTAPI($_UPS_CLIENT_ID,$_UPS_CLIENT_SECRET,$_UPS_ACCOUNT);
	$ups->setOrigin($DATA['origin']['city'],$DATA['origin']['province'],$DATA['origin']['postal_code'],$DATA['origin']['country']);
	$ups->setDestination($DATA['destination']['city'],$DATA['destination']['province'],$DATA['destination']['postal_code'],$DATA['destination']['country'],$isresidential,$DATA['destination']['address1']);
	$r = $ups->getRateSurepost($packages,$serviceCode) {
	if ($r) {
		foreach ($r as $_r) {
			$_RATES[] = array(
				"service_name" => $_r['name'],
				"service_code" => $_r['code'],
				"total_price" => $_r['amount']*100, //in cents
				"currency" => "USD",
			);
		}
	}

	return $_RATES;

	/* do not edit below this line */

}