<?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);

namespace pocketmine\plugin;

use function file;
use function is_file;
use function preg_match;
use function strlen;
use function strpos;
use function substr;
use function trim;
use const FILE_IGNORE_NEW_LINES;
use const FILE_SKIP_EMPTY_LINES;

/**
 * Simple script loader, not for plugin development
 * For an example see https://gist.github.com/shoghicp/516105d470cf7d140757
 */
class ScriptPluginLoader implements PluginLoader{

	public function canLoadPlugin(string $path) : bool{
		$ext = ".php";
		return is_file($path) and substr($path, -strlen($ext)) === $ext;
	}

	/**
	 * Loads the plugin contained in $file
	 */
	public function loadPlugin(string $file) : void{
		include_once $file;
	}

	/**
	 * Gets the PluginDescription from the file
	 */
	public function getPluginDescription(string $file) : ?PluginDescription{
		$content = @file($file, FILE_IGNORE_NEW_LINES | FILE_SKIP_EMPTY_LINES);
		if($content === false){
			return null;
		}

		$data = [];

		$insideHeader = false;
		foreach($content as $line){
			if(!$insideHeader and strpos($line, "/**") !== false){
				$insideHeader = true;
			}

			if(preg_match("/^[ \t]+\\*[ \t]+@([a-zA-Z]+)([ \t]+(.*))?$/", $line, $matches) > 0){
				$key = $matches[1];
				$content = trim($matches[3] ?? "");

				if($key === "notscript"){
					return null;
				}

				$data[$key] = $content;
			}

			if($insideHeader and strpos($line, "*/") !== false){
				break;
			}
		}
		if($insideHeader){
			return new PluginDescription($data);
		}

		return null;
	}

	public function getAccessProtocol() : string{
		return "";
	}
}