<?php declare(strict_types=1);
/**
 * This file is part of the SplendidBear Websites' projects.
 *
 * Copyright (c) 2019 @ www.splendidbear.org
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace App\Controller;

use App\Util\RpcManager;
use App\Util\TopicManager;
use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
use Symfony\Component\HttpFoundation\JsonResponse;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\Response;

/**
 * Class MercureController
 *
 * Handles HTTP API endpoints that replace the former WebSocket RPC and Topic handlers.
 * Client → Server communication is via HTTP POST/GET.
 * Server → Client broadcasting is via Mercure (SSE).
 *
 * @package  App\Controller
 * @author   Lang <https://www.splendidbear.org>
 * @category Class
 * @license  https://www.gnu.org/licenses/lgpl-3.0.en.html GNU Lesser General Public License
 * @link     www.splendidbear.org
 * @since    2026. 04. 09.
 */
class MercureController extends AbstractController
{
    public function __construct(
        private readonly TopicManager $topicManager,
        private readonly RpcManager   $rpcManager,
    ) {
    }

    /** POST /api/game/start — save the grid and create the PlayedGame record */
    public function start(Request $request): JsonResponse
    {
        $data = $request->toArray();
        $result = $this->rpcManager->saveGrid([$data['grid'], $data['gameAssoc']]);

        return $this->json(['success' => $result]);
    }

    /** GET /api/game/connect/{gameAssoc} — return grid + current user info (base64 JSON) */
    public function connect(string $gameAssoc): Response
    {
        $payload = $this->rpcManager->getConnectInformation($gameAssoc);

        return new Response($payload, Response::HTTP_OK, ['Content-Type' => 'text/plain']);
    }

    /** POST /api/game/join/{gameAssoc} — register the player, broadcast subscription event via Mercure */
    public function join(string $gameAssoc, Request $request): JsonResponse
    {
        $this->topicManager->subscribe($gameAssoc, $this->resolveUserName($request), $this->getUser());

        return $this->json(['success' => true]);
    }

    /** POST /api/game/step/{gameAssoc} — persist the step and broadcast game event via Mercure */
    public function step(string $gameAssoc, Request $request): JsonResponse
    {
        $this->topicManager->publish($gameAssoc, $this->resolveUserName($request), $request->toArray());

        return $this->json(['success' => true]);
    }

    /** POST /api/game/leave/{gameAssoc} — broadcast disconnect event via Mercure */
    public function leave(string $gameAssoc, Request $request): JsonResponse
    {
        $this->topicManager->unSubscribe($gameAssoc, $this->resolveUserName($request));

        return $this->json(['success' => true]);
    }

    private function resolveUserName(Request $request): string
    {
        $user = $this->getUser();

        if (null !== $user) {
            return $user->getUserIdentifier();
        }

        $sessionId = $request->getSession()->getId();
        if (empty($sessionId)) {
            $sessionId = bin2hex(random_bytes(16));
        }

        return 'anon_' . $sessionId;
    }
}