<?php

interface HousePartInterface
{
    public function getName(): string;
}

abstract class NameValidator
{
    protected function validateName(string $name): void
    {
        if (strlen($name) <= 3) {
            throw new InvalidArgumentException("Name is too short! ($name)");
        }
    }
}

class Roof extends NameValidator implements HousePartInterface
{
    private $name;

    public function __construct(string $name)
    {
        $this->validateName($name);
        $this->name = $name;
    }

    public function getName(): string
    {
        return $this->name;
    }
}

class Wall extends NameValidator implements HousePartInterface
{
    private $name;

    public function __construct(string $name)
    {
        $this->validateName($name);
        $this->name = $name;
    }

    public function getName(): string
    {
        return $this->name;
    }
}

class Window extends NameValidator implements HousePartInterface
{
    private $name;

    public function __construct(string $name)
    {
        $this->validateName($name);
        $this->name = $name;
    }

    public function getName(): string
    {
        return $this->name;
    }
}

class Door extends NameValidator implements HousePartInterface
{
    private $name;

    public function __construct(string $name)
    {
        $this->validateName($name);
        $this->name = $name;
    }

    public function getName(): string
    {
        return $this->name;
    }
}

class LittleDoor extends Door
{

}

class LittleWindow extends Window
{

}

class House extends NameValidator
{
    private $name;
    private $parts;

    public function __construct(string $name, array $parts)
    {
        $this->validateName($name);
        $this->validateName($name);
        $this->validateParts($parts);
        $this->name = $name;
        $this->parts = $parts;

    }

    private function validateParts(array $parts): void
    {
        foreach ($parts as $part) {
            if (!$part instanceof HousePartInterface) {
                throw new InvalidArgumentException('Part is not a part of house');
            }
        }
    }

}

try {

    $house = new House('House', [
        new Roof('Roof'),
        new Wall('Wall'),
        new Window('Window'),
        new Door('Door'),
        new LittleDoor('LittleDoor'),
        new LittleWindow('LittleWindow')
    ]);

    echo 'Success' . PHP_EOL;
} catch (InvalidArgumentException $exception) {

    echo $exception->getMessage();

}