<?php
declare(strict_types=1);

namespace App\Domain\Webshop;

use Money\Money;
use Ramsey\Uuid\Uuid;

class Cart implements CartInterface
{
    private $uuid;
    /**
     * @var CartItem[]
     */
    private $cartItems;

    public function __construct()
    {
        $this->uuid = Uuid::uuid4()->toString();
        $this->clear();
    }

    /**
     * @return int
     */
    public function countItems(): int
    {
        return count($this->cartItems);
    }

    /**
     * @return string
     */
    public function getId(): string
    {
        return $this->uuid;
    }

    /**
     * @param CartItem $cartItem
     */
    public function add(CartItem $cartItem): void
    {
        $this->cartItems[] = $cartItem;
    }

    public function clear(): void
    {
        $this->cartItems = [];
    }

    public function getTotalQuantity()
    {
        $totalQuantity = 0;
        foreach ($this->cartItems as $cartItem) {
            $totalQuantity += $cartItem->getQuantity()->asInt();
        }
        return $totalQuantity;
    }
}




class CartItem implements CartItemInterface
{
    private $name;
    private $quantity;
    private $price;

    public function __construct(CartItemName $cartItemName, CartItemQuantity $cartItemQuantity, CartItemUnitPrice $cartItemUnitPrice)
    {
        $this->name = $cartItemName;
        $this->quantity = $cartItemQuantity;
        $this->price = $cartItemUnitPrice;
    }

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

    public function getQuantity(): CartItemQuantity
    {
        return $this->quantity;
    }

    public function getTotalPrice(): Money
    {
        return $this->price->asMoney()->multiply($this->quantity->asInt());
    }
}



class CartSpec extends ObjectBehavior
{
    function it_is_initializable()
    {
        $this->shouldHaveType(Cart::class);
        $this->shouldImplement(CartInterface::class);
    }

    function it_returns_total_quantity_in_cart(CartItem $cartItem1, CartItem $cartItem2, CartItemName $cartItemName, CartItemQuantity $cartItemQuantity, CartItemUnitPrice $cartItemUnitPrice)
    {
//        $cartItemQuantity->asInt()->willReturn(3);
//        $cartItem1->beConstructedWith([$cartItemName->getWrappedObject(), $cartItemQuantity->getWrappedObject(), $cartItemUnitPrice->getWrappedObject()]);
        $cartItemQuantity = new CartItemQuantity(3);
        $cartItem1->getQuantity()->willReturn($cartItemQuantity);
        $this->add($cartItem1);
        $this->add($cartItem2);
        $this->getTotalQuantity()->shouldReturn(3);
    }
}