<?php declare(strict_types=1);

namespace SmcShipcloudLive\Core\Checkout\Cart\Delivery;

use Shopware\Core\Checkout\Cart\Cart;
use Shopware\Core\Checkout\Cart\CartBehavior;
use Shopware\Core\Checkout\Cart\CartDataCollectorInterface;
use Shopware\Core\Checkout\Cart\CartProcessorInterface;
use Shopware\Core\Checkout\Cart\LineItem\CartDataCollection;
use Shopware\Core\Checkout\Cart\Price\Struct\CalculatedPrice;
use Shopware\Core\System\SalesChannel\SalesChannelContext;
use Shopware\Core\Checkout\Shipping\Cart\Error\ShippingMethodBlockedError;

use Shopware\Core\Checkout\Cart\Delivery\DeliveryBuilder;
use Shopware\Core\Checkout\Cart\Delivery\DeliveryCalculator;
use Shopware\Core\Framework\DataAbstractionLayer\EntityRepositoryInterface;
use Shopware\Core\Checkout\Cart\Tax\Struct\CalculatedTaxCollection;
use Shopware\Core\Checkout\Cart\Tax\Struct\TaxRuleCollection;


class SmcDeliveryProcessor implements CartProcessorInterface, CartDataCollectorInterface
{
	protected $builder;
	protected $deliveryCalculator;
	protected $shippingMethodRepository;

	public function __construct(DeliveryBuilder $builder, DeliveryCalculator $deliveryCalculator,
        			    EntityRepositoryInterface $shippingMethodRepository)
	{
        	$this->builder = $builder;
        	$this->deliveryCalculator = $deliveryCalculator;
        	$this->shippingMethodRepository = $shippingMethodRepository;
	}

	public static function buildKey(string $shippingMethodId): string
	{
		return 'shipping-method-' . $shippingMethodId;
	}

	public function collect(CartDataCollection $data, Cart $original, SalesChannelContext $context, CartBehavior $behavior): void
	{
		//$original->addErrors( new ShippingMethodBlockedError((string) "Foobar collect"));

		/* ensure we have at least one shipping method  key to avoid ShippingMethodNotFoundException */
		$default_ship = $context->getShippingMethod();
		$default_ship_id = $default_ship->getId();
		$key = self::buildKey($default_ship_id);
		$data->set($key, $default_ship);
	}

	public function process(CartDataCollection $data, Cart $original, Cart $toCalculate, SalesChannelContext $context, CartBehavior $behavior): void
	{
		/* below steps 1:1 from original shopware DeliveryProcessor */
		$deliveries = $this->builder->build($toCalculate, $data, $context, $behavior);
		$delivery = $deliveries->first();

		/* custom computation of costs */
		$costs = new CalculatedPrice(23, 42, new CalculatedTaxCollection(), new TaxRuleCollection());
		$delivery->setShippingCosts($costs);

		/* below steps 1:1 from original shopware DeliveryProcessor */
		$this->deliveryCalculator->calculate($data, $toCalculate, $deliveries, $context);
		$toCalculate->setDeliveries($deliveries);
	}
}