<?php

	$input = preg_split("/\n/", $_GET['students']);
	$column = $_GET['column'];
	$order = $_GET['order'];
	unset($input[count($input) - 1]);
	for ($i = 0; $i < count($input); $i ++) {
		$input[$i] = preg_split('/, /', $input[$i]);
		$input[$i][] = $i + 1;
	}
	if($column == 'result'){
		$column = 3;
	} else if($column == 'id'){
		$column = 4;
	}
	else $column = 0;

	if($column == 0){
		if($order == 'descending'){
			uasort($input , 'dComparerUsername');
		}
		else{
			uasort($input, 'ComparerUsername');
		}
	}
	else if($column == 3){
		if($order == 'descending'){
			uasort($input , 'dComparerResult');
		}
		else{
			uasort($input, 'ComparerResult');
		}
	}
	else{

			if($order == 'descending'){
				uasort($input , 'dComparerid');
			}
			else{
				uasort($input, 'Comparerid');
			}

	}

	echo '<table><thead><tr><th>Id</th><th>Username</th><th>Email</th><th>Type</th><th>Result</th></tr></thead>';

	foreach ($input as $key => $value) {
		echo '<tr><td>' . htmlspecialchars(trim($input[$key][4])) . '</td><td>' . htmlspecialchars(trim($input[$key][0])) . '</td><td>' . htmlspecialchars(trim($input[$key][1])) . '</td><td>' . htmlspecialchars(trim($input[$key][2])) . '</td><td>' . htmlspecialchars(trim($input[$key][3])) . '</td></tr>';
	}

	echo '</table>';




	function dComparerResult($first, $second) {

	    if ((int)$first[3] < (int)$second[3]) {
	        return 1;
	    }
	    else if ((int)$first[3] > (int)$second[3]) {
	        return -1;
	    }


	    if ((int)$first[4] < (int)$second[4]) {
	        return 1;
	    }
	    else if ((int)$first[4] > (int)$second[4]) {
	        return -1;
	    }
	    return 0;
	}


	function ComparerResult($first, $second) {

	    if ((int)$first[3] < (int)$second[3]) {
	        return -1;
	    }
	    else if ((int)$first[3] > (int)$second[3]) {
	        return 1;
	    }


	    if ((int)$first[4] < (int)$second[4]) {
	        return -1;
	    }
	    else if ((int)$first[4] > (int)$second[4]) {
	        return 1;
	    }
	    return 0;
	}


	function dComparerid($first, $second) {

	    if ((int)$first[4] < (int)$second[4]) {
	        return 1;
	    }
	    else if ((int)$first[4] > (int)$second[4]) {
	        return -1;
	    }
	    return 0;
	}

	function Comparerid($first, $second) {

	    if ((int)$first[4] < (int)$second[4]) {
	        return -1;
	    }
	    else if ((int)$first[4] > (int)$second[4]) {
	        return 1;
	    }
	    return 0;
	}



	function dComparerUsername($first, $second) {

	    if ($first[3] < $second[3]) {
	        return 1;
	    }
	    else if ($first[3] > $second[3]) {
	        return -1;
	    }


	    if ((int)$first[4] < (int)$second[4]) {
	        return 1;
	    }
	    else if ((int)$first[4] > (int)$second[4]) {
	        return -1;
	    }
	    return 0;
	}


	function ComparerUsername($first, $second) {

	    if ($first[3] < $second[3]) {
	        return -1;
	    }
	    else if ($first[3] > $second[3]) {
	        return 1;
	    }


	    if ((int)$first[4] < (int)$second[4]) {
	        return -1;
	    }
	    else if ((int)$first[4] > (int)$second[4]) {
	        return 1;
	    }
	    return 0;
	}
?>