Computer-Smuggler

$parts = $_GET['list'];

$parts = str_replace(' ', '', $parts);

$partsArray = explode(',', $parts);

$groupedParts = [];
foreach($partsArray as $part) {
	if(!empty($part)) {
		if(!isset($groupedParts[$part])) {
			$groupedParts[$part] = 0;
		}
		
		$groupedParts[$part]++;
	}
}

$prices = array(
	'CPU' => '85',
	'RAM' => '35',
	'VIA' => '45',
	'ROM' => '45',
);

$totalPartsPrice = get_total_price($groupedParts, $prices);

$computers = $leftParts = $profit = $leftPartsPrice = 0;

$minComputers = min($groupedParts);

for($i = 0; $i < $minComputers; $i++) {
	if((isset($groupedParts['CPU']) && $groupedParts['CPU'] > 0) && 
		(isset($groupedParts['RAM']) && $groupedParts['RAM'] > 0) &&
		(isset($groupedParts['VIA']) && $groupedParts['VIA'] > 0) &&
		(isset($groupedParts['ROM']) && $groupedParts['ROM'] > 0)) {
		
		$computers++;
		$groupedParts['CPU']--;
		$groupedParts['RAM']--;
		$groupedParts['VIA']--;
		$groupedParts['ROM']--;
	}
}

foreach($groupedParts as $key=>$leftPart) {
	$leftParts += $leftPart;
	$leftPartsPrice += $leftPart * ($prices[$key] / 2);
}

echo '<ul>';
echo '<li>'.$computers.' computers assembled</li>';
echo '<li>'.$leftParts.' parts left</li>';
echo '</ul>';

$income = ($computers * 420) + $leftPartsPrice;

$profit = $income - $totalPartsPrice;
if($profit > 0) {
	echo '<p>Nakov gained '.$profit.' leva</p>';
} else {
	echo '<p>Nakov lost '. $profit.' leva</p>';
}

function get_total_price($parts, $prices) {
	
	$total = 0;
	
	foreach($parts as $key=>$part) {
		if($part > 4) {
			$total += $part * ($prices[$key] / 2);
		} else {
			$total += $part * $prices[$key];
		}
	}
	
	return $total;
}

?>