<?php

declare(strict_types=1);

namespace Pcm\MetadataBundle\Model;

use Pcm\MetadataBundle\Exception\MissingKeyException;
use Pcm\MetadataBundle\Interface\MetadataInterface;

/**
 * Store scalar metadata on an entity.
 */
final class Metadata implements MetadataInterface
{
    /**
     * @param array<string, scalar|scalar[]> &$metadata
     */
    public function __construct(private array &$metadata)
    {
    }

    public function get(string $key): mixed
    {
        if (!$this->isSet($key)) {
            throw new MissingKeyException($key);
        }

        return $this->metadata[$key];
    }

    public function set(string $key, mixed $value): static
    {
        $this->metadata[$key] = $value;

        return $this;
    }

    public function isSet(string $key): bool
    {
        return array_key_exists($key, $this->metadata);
    }
}