/* 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();

	//stop on first match, so if you want to match on postcode, make sure they appear first on the list for each vendor
	$config = array(
		//this will apply to postcodes 1000-2249 inclusive in australia
		array(
			'country' => 'AU', //comma separated, leave blank for any
			'state' => '', //comma separated, leave blank for any
			'postcode' => array_merge(range(1000,2249)), //comma separated, leave blank for any
			'ratetype' => 'weight', //weight or qty
			'rates' => array(
				array('start'=>0, 'end'=>1000, 'rate'=>4.95),
				array('start'=>1000, 'end'=>9999999, 'rate'=>40),
			),
		),
		//this will apply to postcodes 3000-3050 and 3060-3500 inclusive in australia
		array(
			'country' => 'AU', //comma separated, leave blank for any
			'state' => '', //comma separated, leave blank for any
			'postcode' => array_merge(range(3000,3050),range(3060,3500)), //comma separated, leave blank for any
			'ratetype' => 'weight', //weight or qty
			'rates' => array(
				array('start'=>0, 'end'=>1000, 'rate'=>4.95),
				array('start'=>1000, 'end'=>9999999, 'rate'=>40),
			),
		),
	);

	//tally the weight, qty and total for each vendor too
	$qty = 0;
	$weighttotal = 0;
	$pricetotal = 0;
	foreach ($DATA['items'] as $item) {
		$qty += $item['quantity'];
		$weighttotal += $item['quantity']*$item['grams']; //in grams
		$pricetotal += $item['quantity']*$item['price']/100; //in dollars
	}
	
	$country = strtoupper($DATA['destination']['country']);
	$postcode = strtoupper($DATA['destination']['postal_code']);
	$state = strtoupper($DATA['destination']['province']);
	
	//go through each item and apply shipping schedule, tally rate
	$totalRate = 0;
	
	//go through each rate and work out which one applies
	//stop on first match
	$match = null;
	foreach ($config as $vr) {
		//match country
		$countryMatched = false;
		if ($vr['country'] != '') {
			if (strpos($vr['country'],',')!==false) {
				$_country = explode(',',$vr['country']);
				if (in_array($country,$_country)) {
					//matched country within a list
					$countryMatched = true;
				}
			} else if ($vr['country'] == $country) {
				//matched single entry country
				$countryMatched = true;
			}
		} else {
			$countryMatched = true;
		}
		//match state
		$stateMatched = false;
		if ($vr['state'] != '') {
			if (strpos($vr['state'],',')!==false) {
				$_state = explode(',',$vr['state']);
				if (in_array($state,$_state)) {
					//matched state within a list
					$stateMatched = true;
				}
			} else if ($vr['state'] == $state) {
				//matched single entry state
				$stateMatched = true;
			}
		} else {
			$stateMatched = true;
		}
		//match postcode
		$postcodeMatched = false;
		if ($vr['postcode'] != '') {
			if (strpos($vr['postcode'],',')!==false) {
				$_postcode = explode(',',$vr['postcode']);
				if (in_array($postcode,$_postcode)) {
					//matched postcode within a list
					$postcodeMatched = true;
				}
			} else if ($vr['postcode'] == $postcode) {
				//matched single entry postcode
				$postcodeMatched = true;
			}
		} else {
			$postcodeMatched = true;
		}
		
		if ($countryMatched && $stateMatched && $postcodeMatched) {
			//match found
			$match = $vr;
			break;
		}
	}
	
	if ($match !== null) {
		$matchedRate = null;
		if ($match['ratetype'] == 'weight') {
			//by weight
			foreach ($match['rates'] as $r) {
				if ($r['start'] <= $weighttotal && $weighttotal <= $r['end']) {
					$matchedRate = $r;
					break;
				}
			}
		} else {
			//by qty
			foreach ($match['rates'] as $r) {
				if ($r['start'] <= $qty && $qty <= $r['end']) {
					$matchedRate = $r;
					break;
				}
			}
		}
		
		if ($matchedRate !== null) {
			//add on the rate for this vendor's products
			$totalRate += $matchedRate['rate'];
		} else {
			//no rate found for this qty/weight range
			return array(); //uncomment this if you want the order to be blocked, otherwise free shipping for this vendor
		}
	} else {
		//no rate found for this vendor
		//return array(); //uncomment this if you want the order to be blocked, otherwise free shipping for this vendor
	}

	if ($totalRate !== null) {
		$_RATES[] = array(
			"service_name" => 'Standard Shipping',
			"service_code" => 'STANDARD',
			"total_price" => $totalRate*100, //in cents
			"currency" => "BRL",
		);
	}

	return $_RATES;

	/* do not edit below this line */

}