<?php

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

class Roof implements hasName
{
    private $name;

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

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

class Wall implements hasName
{
    private $name;

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

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

class Window implements hasName
{
    private $name;

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

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

class Door implements hasName
{
    private $name;

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

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

class LittleDoor extends Door
{

}

class LittleWindow extends Window
{

}

class House
{
    private $name;
    private $parts;

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

    public function validateParts(array $parts): bool
    {
        foreach ($parts as $part) {
            if (!$part instanceof hasName) {
                throw new InvalidArgumentException('Part is not an instance of hasName');
            }
        }
        return true;
    }

    public function validateName(string $name): bool
    {
        if (strlen($name) <= 3) {
            throw new InvalidArgumentException("Name of the house is too short! ($name)");
        }
        return true;
    }

}

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();

}