<?php

namespace App\Support;

final class EmailRecipients
{
    /**
     * @return array<int, string>
     */
    public static function parse(?string $value): array
    {
        if (!$value) {
            return [];
        }

        return collect(preg_split('/[,;]+/', $value) ?: [])
            ->map(fn ($email) => trim((string) $email))
            ->filter(fn ($email) => $email !== '' && filter_var($email, FILTER_VALIDATE_EMAIL))
            ->unique()
            ->values()
            ->all();
    }
}