<?php

/*
 *
 *  ____            _        _   __  __ _                  __  __ ____
 * |  _ \ ___   ___| | _____| |_|  \/  (_)_ __   ___      |  \/  |  _ \
 * | |_) / _ \ / __| |/ / _ \ __| |\/| | | '_ \ / _ \_____| |\/| | |_) |
 * |  __/ (_) | (__|   <  __/ |_| |  | | | | | |  __/_____| |  | |  __/
 * |_|   \___/ \___|_|\_\___|\__|_|  |_|_|_| |_|\___|     |_|  |_|_|
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * @author PocketMine Team
 * @link http://www.pocketmine.net/
 *
 *
*/

declare(strict_types=1);

use pocketmine\world\format\io\FormatConverter;
use pocketmine\world\format\io\WorldProvider;
use pocketmine\world\format\io\WorldProviderManager;
use pocketmine\world\format\io\WritableWorldProvider;
use pocketmine\world\generator\GeneratorManager;

require_once dirname(__DIR__) . '/vendor/autoload.php';

WorldProviderManager::init();
GeneratorManager::registerDefaultGenerators();
define('pocketmine\RESOURCE_PATH', dirname(__DIR__) . '/resources/');


$writableFormats = array_filter(WorldProviderManager::getAvailableProviders(), function(string $class){
	return is_a($class, WritableWorldProvider::class, true);
});
$requiredOpts = [
	"world" => "path to the input world for conversion",
	"backup" => "path to back up the original files",
	"format" => "desired output format (can be one of: " . implode(",", array_keys($writableFormats)) . ")"
];
$usageMessage = "Options:\n";
foreach($requiredOpts as $_opt => $_desc){
	$usageMessage .= "\t--$_opt : $_desc\n";
}
$args = getopt("", array_map(function(string $str){ return "$str:"; }, array_keys($requiredOpts)));
foreach($requiredOpts as $opt => $desc){
	if(!isset($args[$opt])){
		die($usageMessage);
	}
}
if(!array_key_exists($args["format"], $writableFormats)){
	die($usageMessage);
}

$inputPath = realpath($args["world"]);
if($inputPath === false){
	die("Cannot find input world at location: " . $args["world"]);
}
$backupPath = $args["backup"];
if((!@mkdir($backupPath, 0777, true) and !is_dir($backupPath)) or !is_writable($backupPath)){
	die("Backup file path " . $backupPath . " is not writable (permission error or doesn't exist), aborting");
}

$oldProviderClasses = WorldProviderManager::getMatchingProviders($inputPath);
if(count($oldProviderClasses) === 0){
	die("Unknown input world format");
}
if(count($oldProviderClasses) > 1){
	die("Ambiguous input world format: matched " . count($oldProviderClasses) . " (" . implode(array_keys($oldProviderClasses)) . ")");
}
$oldProviderClass = array_shift($oldProviderClasses);
/** @var WorldProvider $oldProvider */
$oldProvider = new $oldProviderClass($inputPath);

$converter = new FormatConverter($oldProvider, $writableFormats[$args["format"]], realpath($backupPath), GlobalLogger::get());
$converter->execute();