<?php
/**
 * Lightweight PSR-4 autoloader used when Composer is not installed.
 *
 * Maps the `GripMCP\` namespace to the `includes/` directory. Class names use the
 * PascalCase_With_Underscores convention and files match the class name exactly
 * (e.g. GripMCP\Tools\Posts\Posts_Create_Tool -> includes/Tools/Posts/Posts_Create_Tool.php).
 *
 * @package GripMCP
 */

declare( strict_types=1 );

namespace GripMCP;

defined( 'ABSPATH' ) || exit;

final class Autoloader {

	private const PREFIX  = 'GripMCP\\';
	private const BASEDIR = 'includes/';

	/**
	 * Register the autoloader with the SPL stack.
	 */
	public static function register(): void {
		spl_autoload_register( array( __CLASS__, 'autoload' ) );
	}

	/**
	 * Resolve a fully-qualified class name to a file and require it.
	 *
	 * @param string $class Fully-qualified class name.
	 */
	public static function autoload( string $class ): void {
		if ( 0 !== strncmp( $class, self::PREFIX, strlen( self::PREFIX ) ) ) {
			return;
		}

		$relative = substr( $class, strlen( self::PREFIX ) );
		$path     = GRIPMCP_DIR . self::BASEDIR . str_replace( '\\', '/', $relative ) . '.php';

		if ( is_readable( $path ) ) {
			require $path;
		}
	}
}