<?php

declare(strict_types=1);

namespace PhpQml\Bridge;

use Symfony\Component\Mercure\HubInterface;
use Symfony\Component\Mercure\Update;

/**
 * Publishes envelopes onto the bridge's Mercure hub.
 *
 * Topic conventions and envelope shape are defined in PLAN.md §4.
 * Reactive-model-aware helpers (publishModelUpdate, etc.) arrive with
 * the model layer in Phase 2.
 */
final readonly class Publisher
{
    public function __construct(
        private HubInterface $hub,
    ) {
    }

    /**
     * @param array<string, mixed> $envelope
     */
    public function publish(string $topic, array $envelope, bool $private = false): string
    {
        return $this->hub->publish(new Update(
            $topic,
            json_encode($envelope, \JSON_THROW_ON_ERROR),
            $private,
        ));
    }
}