<?php

namespace App\Services\Scheduling\Data;

class SchedulingSlot
{
    public function __construct(
        public readonly int $hari,
        public readonly int $sesi
    ) {
    }

    /**
     * Membandingkan apakah dua slot sama (hari & sesi identik).
     */
    public function equals(SchedulingSlot $other): bool
    {
        return $this->hari === $other->hari && $this->sesi === $other->sesi;
    }

    /**
     * Mengembalikan string unik untuk keperluan hash/lookup.
     * Contoh: hari=2, sesi=3 → "2-3"
     */
    public function toKey(): string
    {
        return "{$this->hari}-{$this->sesi}";
    }

    /**
     * Membuat SchedulingSlot dari string key.
     * Contoh: "2-3" → SchedulingSlot(2, 3)
     */
    public static function fromKey(string $key): self
    {
        [$hari, $sesi] = explode('-', $key);
        return new self((int) $hari, (int) $sesi);
    }
}