<?php
declare(strict_types=1);
session_start();

if (empty($_SESSION['miter'])) {
	header('Location: ../../index.php');
	exit;
}

function formatbytes(int $bytes, int $precision = 2): string { 
	$units = array('b', 'kb', 'mb', 'gb', 'tb'); 
	$bytes = max($bytes, 0); 
	$pow = floor(($bytes ? log($bytes) : 0) / log(1024)); 
	$pow = (int)min($pow, count($units) - 1); 
	$bytes /= (1 << (10 * $pow)); 
	return round($bytes, $precision) . ' ' . $units[$pow]; 
}

if (!function_exists('calculate_directory_size')) {
	function calculate_directory_size(string $dir): int {
		$total_size = 0;
		$files = glob($dir . '/*');
		if ($files !== false) {
			foreach ($files as $path) {
				if (is_file($path)) {
					$total_size += filesize($path);
				} elseif (is_dir($path) && function_exists('get_dir_size')) {
					$total_size += get_dir_size($path);
				}
			}
		}
		return $total_size;
	}
}
$images_count = count(glob('images/*.*') ?: []);
$images_dir_size = calculate_directory_size('images');
$images_size = formatbytes($images_dir_size);

$var_sort = $_GET['sort'] ?? '';
?>

<div class='tenon_header'>
	<div class='tenon_header_td'>
		<span class='title'>Upload <span style='opacity: 0.5;'>| images/</span></span>
	</div>
</div>
<form name='upform' enctype='multipart/form-data' method='post' action='back/tenon/upload_images.php' target='_blank' onsubmit='setTimeout(function(){window.location.reload();},1500);'>
	<div class='full_tenon_table'>
		<div class='full_upload_td'>
			<input type='file' name='imgfiles[]' id='imgfiles' class='upload_file_field' multiple>
		</div>
	</div>
	<input type='submit' name='submit' class='full_submit_button' value='Upload Image(s)'>
</form>

<div class='bump'></div>

<div class='tenon_header'>
	<div class='tenon_header_td_left'>
		<span class='title'>Images <span style='opacity: 0.5;'>| <?php echo $images_count . " - " . $images_size; ?></span></span>
	</div>
	<div class='tenon_header_td_right'>
		<?php if ($var_sort === 'date') { ?>
			<a href='?u=tenon_images&sort=abc'><img src='images/icons/sort_abc.png' class='tenon_list_button' alt='abc'></a> <img src='images/icons/sort_date.png' class='tenon_list_button' alt='date'>
		<?php } else { ?>
			<img src='images/icons/sort_abc.png' class='tenon_list_button' alt='abc'><a href='?u=tenon_images&sort=date'><img src='images/icons/sort_date.png' class='tenon_list_button' alt='date'></a>
		<?php } ?>
	</div>
</div>
<div class='tenon_table'>
	<div class='tenon_td'>
<?php
if (function_exists('isMobile') && isMobile()) {
	$char_count = 25;
} else {
	$char_count = 45;
}
$i = 1;
$file_list = glob("images/*.*");	

if ($file_list !== false) {
	if ($var_sort === 'date') {
		usort($file_list, function($newest, $oldest) {
			return filemtime($oldest) <=> filemtime($newest);
		});
	}
	
	foreach ($file_list as $file_name) {
		$file_name = str_replace("images/", "", $file_name);
		$file_loc = "images/" . $file_name;
		
		if (file_exists($file_loc) && is_file($file_loc)) {
			$file_size = filesize($file_loc);
			$display_size = formatbytes($file_size !== false ? $file_size : 0);
			?>
			<div class='list_doc'>
				<div class='list_doc_left'>
				<span class='text'><?php echo $i++; ?>. </span>
				<a href='images/<?php echo htmlspecialchars($file_name, ENT_QUOTES, 'UTF-8'); ?>' target='_blank'><?php echo htmlspecialchars(substr($file_name, 0, $char_count), ENT_QUOTES, 'UTF-8'); ?></a>
				</div>
				<span class='span_right'>
					<span class='grey'><?php echo htmlspecialchars($display_size, ENT_QUOTES, 'UTF-8'); ?></span> 
					<a href='back/tenon/delete_image.php?d=<?php echo urlencode($file_name); ?>' onclick='return confirm_delete()'>
						<img src='images/icons/delete_line.png' class='tenon_list_button_end' alt='delete'>
					</a>
				</span>
			</div>
			<?php
		}
	}
}
?>
	</div>
</div>