<?php

/*
 * This file is part of the official PHP MCP SDK.
 *
 * A collaboration between Symfony and the PHP Foundation.
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Mcp\Server\RequestHandler;

use Mcp\Schema\Implementation;
use Mcp\Schema\JsonRpc\HasMethodInterface;
use Mcp\Schema\JsonRpc\Response;
use Mcp\Schema\Request\InitializeRequest;
use Mcp\Schema\Result\InitializeResult;
use Mcp\Schema\ServerCapabilities;
use Mcp\Server\MethodHandlerInterface;

/**
 * @author Christopher Hertel <mail@christopher-hertel.de>
 */
final class InitializeHandler implements MethodHandlerInterface
{
    public function __construct(
        public readonly ?ServerCapabilities $capabilities = new ServerCapabilities(),
        public readonly ?Implementation $serverInfo = new Implementation(),
    ) {
    }

    public function supports(HasMethodInterface $message): bool
    {
        return $message instanceof InitializeRequest;
    }

    public function handle(InitializeRequest|HasMethodInterface $message): Response
    {
        \assert($message instanceof InitializeRequest);

        return new Response($message->getId(),
            new InitializeResult($this->capabilities, $this->serverInfo),
        );
    }
}