#!/usr/bin/php
<?
require_once('/standardebooks.org/web/lib/Core.php');

use function Safe\getopt;

$ignoredProperites = ['Created', 'Updated'];  // Ebooks from the filesystem don't have these DB properties set.

function findObjectDifferences($fs, $db): array{
	$diffs = [];
	$fsReflection = new ReflectionClass($fs);
	$dbReflection = new ReflectionClass($db);

	foreach($fsReflection->getProperties() as $fsProperty){
		if(in_array($fsProperty->getName(), $ignoredProperites)){
			continue;
		}

		$dbProperty = $dbReflection->getProperty($fsProperty->getName());

		try{
			if($fsProperty->getName()[0] === '_'){
				// Property starts with underscore, remove the underscore and call __get()
				$propertyNameWithoutUnderscore = substr($fsProperty->getName(), 1);
				if(is_array($fs->$propertyNameWithoutUnderscore) && is_array($db->$propertyNameWithoutUnderscore)){
					foreach($fsProperty->getValue($fs) as $key => $value){
						if(is_object($fsProperty->getValue($fs)[$key])){
							$arrayDiff = findObjectDifferences($fsProperty->getValue($fs)[$key], $dbProperty->getValue($db)[$key]);
							if(!empty($arrayDiff)){
								$diffs[$fsProperty->getName()] = $arrayDiff;
							}
						}
						else if($fsProperty->getValue($fs)[$key] != $dbProperty->getValue($db)[$key]){
							$diffs[$fsProperty->getName()] = ["fs" => $fsProperty->getValue($fs), "db" => $dbProperty->getValue($db)];
						}
					}
				}
				else if($fs->$propertyNameWithoutUnderscore != $db->$propertyNameWithoutUnderscore){
					$diffs[$fsProperty->getName()] = ["fs" => $fsProperty->getValue($fs), "db" => $dbProperty->getValue($db)];
				}
			}
			else if($fsProperty->getValue($fs) != $dbProperty->getValue($db)){
				$diffs[$fsProperty->getName()] = ["fs" => $fsProperty->getValue($fs), "db" => $dbProperty->getValue($db)];
			}
		}
		catch(Error $e){
			$diffs[$fsProperty->getName()] = ['missing'];
		}
	}

	return $diffs;
}

$longopts = ['ebookWwwFilesystemPath:', 'verbose'];
$options = getopt('v', $longopts);

$ebookWwwFilesystemPath = $options['ebookWwwFilesystemPath'] ?? null;

$verbose = false;
if(isset($options['v']) || isset($options['verbose'])){
	$verbose = true;
}

if($ebookWwwFilesystemPath === null){
	print("Expected usage: update-ebook-database [-v,--verbose] --ebookWwwFilesystemPath <path>\n");
	exit(1);
}

if($verbose){
	print("ebookWwwFilesystemPath: $ebookWwwFilesystemPath\n");
}

$ebookFromFilesystem = Ebook::FromFilesystem($ebookWwwFilesystemPath);

if($verbose){
	print("Title: $ebookFromFilesystem->Title\n");
	print("Identifier: $ebookFromFilesystem->Identifier\n");
}

$ebookFromFilesystem->CreateOrUpdate();

$ebookFromDatabase = Ebook::GetByIdentifier($ebookFromFilesystem->Identifier);

$diffs = findObjectDifferences($ebookFromFilesystem, $ebookFromDatabase);

if(!empty($diffs)){
	print("Error: Difference in Ebook on filesystem and in database. Diffs:\n");
	print_r($diffs);
	exit(1);
}
else{
	if($verbose){
		print("Ebook on filesystem and in database match.\n");
	}
	exit(0);
}