Facade

final class Ombor
{
    /** @var array<string, int> */
    private array $qoldiq = ['klaviatura' => 5, 'sichqoncha' => 0];

    public function bormi(string $mahsulot, int $soni): bool
    {
        return ($this->qoldiq[$mahsulot] ?? 0) >= $soni;
    }

    public function band(string $mahsulot, int $soni): void
    {
        $this->qoldiq[$mahsulot] -= $soni;
        echo "  [ombor] {$mahsulot} x{$soni} band qilindi", PHP_EOL;
    }

    public function qoldiq(string $mahsulot): int
    {
        return $this->qoldiq[$mahsulot] ?? 0;
    }
}

final class Toolov
{
    public function yech(string $karta, int $summa): string
    {
        echo "  [tolov] {$summa} som yechildi", PHP_EOL;
        return 'trx_' . substr($karta, -4);
    }

    public function qaytar(string $trx): void
    {
        echo "  [tolov] {$trx} qaytarildi", PHP_EOL;
    }
}

final class Hisobfaktura
{
    public function yarat(string $mijoz, int $summa, string $trx): string
    {
        echo "  [hisob] hisob-faktura yaratildi", PHP_EOL;
        return sprintf('HF-%s-%d', strtoupper(substr($mijoz, 0, 3)), $summa);
    }
}

final class Xabarnoma
{
    public function yubor(string $mijoz, string $matn): void
    {
        echo "  [xabar] {$mijoz}: {$matn}", PHP_EOL;
    }
}

final class Jurnal
{
    public function yoz(string $xabar): void
    {
        echo "  [jurnal] {$xabar}", PHP_EOL;
    }
}

$ombor = new Ombor();
$tolov = new Toolov();
$hisob = new Hisobfaktura();
$xabar = new Xabarnoma();
$jurnal = new Jurnal();

// Mijoz kod - butun jarayonni o'zi boshqaradi
$mahsulot = 'klaviatura';
$soni = 2;
$narx = 250000;

$jurnal->yoz('buyurtma boshlandi');

if (!$ombor->bormi($mahsulot, $soni)) {
    $jurnal->yoz('omborda yetarli emas');
} else {
    $ombor->band($mahsulot, $soni);
    $trx = $tolov->yech('8600123456781234', $narx * $soni);
    $hf = $hisob->yarat('Husanboy', $narx * $soni, $trx);
    $xabar->yubor('Husanboy', "Buyurtmangiz qabul qilindi: {$hf}");
    $jurnal->yoz('buyurtma tugadi: ' . $hf);
}

final readonly class BuyurtmaNatijasi
{
    public function __construct(
        public bool $muvaffaqiyat,
        public string $xabar,
        public ?string $hisobfaktura = null,
    ) {}
}

final class BuyurtmaFasadi
{
    public function __construct(
        private Ombor $ombor,
        private Toolov $tolov,
        private Hisobfaktura $hisob,
        private Xabarnoma $xabar,
        private Jurnal $jurnal,
    ) {}

    public function rasmiylashtir(
        string $mijoz,
        string $mahsulot,
        int $soni,
        int $narx,
        string $karta,
    ): BuyurtmaNatijasi {
        $this->jurnal->yoz("buyurtma: {$mijoz} / {$mahsulot} x{$soni}");

        if (!$this->ombor->bormi($mahsulot, $soni)) {
            $this->jurnal->yoz('omborda yetarli emas');
            return new BuyurtmaNatijasi(false, 'Mahsulot omborda yoq');
        }

        $this->ombor->band($mahsulot, $soni);
        $summa = $narx * $soni;
        $trx = $this->tolov->yech($karta, $summa);

        try {
            $hf = $this->hisob->yarat($mijoz, $summa, $trx);
        } catch (Throwable $x) {
            // xato bo'lsa - pulni qaytaramiz
            $this->tolov->qaytar($trx);
            $this->jurnal->yoz('xato: ' . $x->getMessage());
            return new BuyurtmaNatijasi(false, 'Texnik xato');
        }

        $this->xabar->yubor($mijoz, "Buyurtmangiz qabul qilindi: {$hf}");
        $this->jurnal->yoz('tugadi: ' . $hf);

        return new BuyurtmaNatijasi(true, 'Qabul qilindi', $hf);
    }
}

function fasadYarat(): BuyurtmaFasadi
{
    return new BuyurtmaFasadi(
        new Ombor(), new Toolov(), new Hisobfaktura(),
        new Xabarnoma(), new Jurnal(),
    );
}

$fasad = fasadYarat();

$natija = $fasad->rasmiylashtir(
    mijoz: 'Husanboy',
    mahsulot: 'klaviatura',
    soni: 2,
    narx: 250000,
    karta: '8600123456781234',
);

echo '---', PHP_EOL;
echo 'muvaffaqiyat: ', $natija->muvaffaqiyat ? 'ha' : 'yoq', PHP_EOL;
echo 'hisob-faktura: ', $natija->hisobfaktura ?? '(yoq)', PHP_EOL;

$fasad = fasadYarat();

$natija = $fasad->rasmiylashtir(
    mijoz: 'Malika',
    mahsulot: 'sichqoncha',   // omborda 0 dona
    soni: 1,
    narx: 120000,
    karta: '8600123456781234',
);

echo '---', PHP_EOL;
echo 'muvaffaqiyat: ', $natija->muvaffaqiyat ? 'ha' : 'yoq', PHP_EOL;
echo 'xabar: ', $natija->xabar, PHP_EOL;

$ombor = new Ombor();
$fasad = new BuyurtmaFasadi(
    $ombor, new Toolov(), new Hisobfaktura(),
    new Xabarnoma(), new Jurnal(),
);

// Fasad orqali
$fasad->rasmiylashtir('Nodira', 'klaviatura', 1, 250000, '8600111122223333');

// Kerak bo'lsa - to'g'ridan-to'g'ri
echo 'qoldiq: ', $ombor->qoldiq('klaviatura'), PHP_EOL;
$ombor->band('klaviatura', 1);
echo 'qoldiq: ', $ombor->qoldiq('klaviatura'), PHP_EOL;

// Bu fasad emas - bu foydasiz qatlam
final class OmborFasadi
{
    public function __construct(private readonly Ombor $ombor) {}

    public function bormi(string $m, int $n): bool
    {
        return $this->ombor->bormi($m, $n);
    }

    public function band(string $m, int $n): void
    {
        $this->ombor->band($m, $n);
    }
}

$f = new OmborFasadi(new Ombor());
var_dump($f->bormi('klaviatura', 3));

// Bitta katta fasad o'rniga uchta aniq fasad
final class BuyurtmaBerish
{
    public function __construct(private readonly Ombor $ombor) {}

    public function tekshir(string $mahsulot, int $soni): string
    {
        return $this->ombor->bormi($mahsulot, $soni)
            ? 'mavjud' : 'yoq';
    }
}

final class BuyurtmaBekorQilish
{
    public function __construct(private readonly Toolov $tolov) {}

    public function bekor(string $trx): string
    {
        $this->tolov->qaytar($trx);
        return 'bekor qilindi';
    }
}

echo (new BuyurtmaBerish(new Ombor()))->tekshir('klaviatura', 3), PHP_EOL;
echo (new BuyurtmaBekorQilish(new Toolov()))->bekor('trx_1234'), PHP_EOL;

echo 'Adapter:  begona -> bizniki   (interfeys tarjima qilinadi)', PHP_EOL;
echo 'Facade:   5 sinf -> 1 metod   (tartib fasadda)', PHP_EOL;
echo 'Mediator: A<->B<->C -> M      (aloqa markazlashadi)', PHP_EOL;