/* 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();

	$_CP_APIUSER = 'API USER';
	$_CP_APIPASS = 'API PASSWORD';
	$_CP_CUSTOMERNUMBER = 'CUSTOMER NUMBER';
	$_CP_CONTRACTNUMBER = 'CONTRACT NUMBER, LEAVE BLANK FOR NONE';

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

	//clean postcode
	$DATA['origin']['postal_code'] = strtoupper(preg_replace('/[^A-Z0-9]/i','',$DATA['origin']['postal_code']));
	$DATA['destination']['postal_code'] = strtoupper(preg_replace('/[^A-Z0-9]/i','',$DATA['destination']['postal_code']));

	$CP = new CanadaPostAPI($_CP_APIUSER,$_CP_APIPASS,$_CP_CUSTOMERNUMBER,$_CP_CONTRACTNUMBER);

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

	$packages = array(
		array('length'=>5, 'width'=>5, 'height'=>5, 'weight'=>ceil($w)),
	);

	//canada post
	$CP->setOrigin('','',$DATA['origin']['postal_code']);
	$CP->setDestination($DATA['destination']['city'],$DATA['destination']['province'],$DATA['destination']['postal_code'],$DATA['destination']['country'],$isresidential);
	$r = $CP->getRate($packages);
	if ($r) {
		foreach ($r as $_r) {
			$_RATES[] = array(
				"service_name" => 'Canada Post '.$_r['name'].' ('.$_r['businessdays'].' Business Days)',
				"service_code" => $_r['code'],
				"total_price" => $_r['amount']*100, //in cents
				"currency" => "CAD",
			);
		}
	}

	return $_RATES;

	/* do not edit below this line */

}