<?php

declare(strict_types=1);

namespace Domain\Models\ValueObjects;

use Carbon\CarbonInterval;

final readonly class PickupTimeSlot implements \Stringable
{
    public const LENGTH = 10;

    private \DateTimeInterface $at;

    private \DateInterval $for;

    public function __construct(
        \DateTimeInterface $at,
        \DateInterval $for,
    ) {
        $this->at  = clone $at;
        $this->for = clone $for;
    }

    public function getAt(): \DateTimeImmutable
    {
        return $this->at instanceof \DateTimeImmutable
            ? $this->at
            : \DateTimeImmutable::createFromInterface($this->at);
    }

    public function getFor(): \DateInterval
    {
        return $this->for;
    }

    public function getEndsAt(): \DateTimeImmutable
    {
        return $this->getAt()->add($this->for);
    }

    public function __toString(): string
    {
        return sprintf(
            '%s (%s)',
            $this->getAt()->format(\DateTimeInterface::RFC3339),
            CarbonInterval::instance($this->for)->spec()
        );
    }
}