<?php

declare(strict_types=1);

namespace Domain\Models\ValueObjects;

use Webmozart\Assert\Assert;

final readonly class PictureMetadata
{
    public function __construct(
        public ?string $alt = null,
        public ?string $title = null,
    ) {
        if ($this->alt !== null) {
            $trimmedAlt = trim($this->alt);
            Assert::stringNotEmpty($trimmedAlt, 'Picture alt cannot be empty when provided.');
            Assert::minLength($trimmedAlt, 4, 'Picture alt must be at least 4 characters.');
            Assert::maxLength($trimmedAlt, 75, 'Picture alt cannot exceed 75 characters.');
        }

        if ($this->title !== null) {
            $trimmedTitle = trim($this->title);
            Assert::stringNotEmpty($trimmedTitle, 'Picture title cannot be empty when provided.');
            Assert::minLength($trimmedTitle, 4, 'Picture title must be at least 4 characters.');
            Assert::maxLength($trimmedTitle, 75, 'Picture title cannot exceed 75 characters.');
        }
    }
}