<?php

declare(strict_types=1);

/*
 * CoreShop
 *
 * This source file is available under two different licenses:
 *  - GNU General Public License version 3 (GPLv3)
 *  - CoreShop Commercial License (CCL)
 * Full copyright and license information is available in
 * LICENSE.md which is distributed with this source code.
 *
 * @copyright  Copyright (c) CoreShop GmbH (https://www.coreshop.org)
 * @license    https://www.coreshop.org/license     GPLv3 and CCL
 *
 */

namespace CoreShop\Component\Core\Order\Processor;

use CoreShop\Component\Core\Model\ProductInterface;
use CoreShop\Component\Core\Product\ProductTaxCalculatorFactoryInterface;
use CoreShop\Component\Core\Provider\AddressProviderInterface;
use CoreShop\Component\Order\Model\OrderItemInterface;
use CoreShop\Component\Order\Processor\CartItemProcessorInterface;
use CoreShop\Component\Resource\Factory\FactoryInterface;
use CoreShop\Component\Resource\Repository\RepositoryInterface;
use CoreShop\Component\Taxation\Calculator\TaxCalculatorInterface;
use CoreShop\Component\Taxation\Model\TaxItemInterface;
use CoreShop\Component\Taxation\Model\TaxRateInterface;
use Pimcore\Model\DataObject\Fieldcollection;
use Webmozart\Assert\Assert;

final class CartItemProcessor implements CartItemProcessorInterface
{
    public function __construct(
        private ProductTaxCalculatorFactoryInterface $taxCalculator,
        private AddressProviderInterface $defaultAddressProvider,
        private RepositoryInterface $taxRateRepository,
        private FactoryInterface $taxItemFactory,
    ) {
    }

    public function processCartItem(
        OrderItemInterface $cartItem,
        int $itemPrice,
        int $itemRetailPrice,
        int $itemDiscountPrice,
        int $itemDiscount,
        array $context,
    ): void {
        /**
         * @var \CoreShop\Component\Core\Model\OrderItemInterface $cartItem
         */
        Assert::isInstanceOf($cartItem, \CoreShop\Component\Core\Model\OrderItemInterface::class);

        $product = $cartItem->getProduct();
        $cart = $context['cart'];
        $store = $context['store'];

        $taxCalculator = $this->taxCalculator->getTaxCalculator(
            $product,
            $cart->getShippingAddress() ?: $this->defaultAddressProvider->getAddress($cart),
            $context,
        );

        $quantity = $cartItem->getQuantity();

        if ($taxCalculator instanceof TaxCalculatorInterface) {
            if ($store->getUseGrossPrice()) {
                $totalTaxAmount = $taxCalculator->getTaxesAmountFromGross((int) round($itemPrice * $quantity));
                $totalTaxAmountArray = $taxCalculator->getTaxesAmountFromGrossAsArray((int) round($itemPrice * $quantity));
                $itemPriceTax = $taxCalculator->getTaxesAmountFromGross($itemPrice);
                $itemRetailPriceTaxAmount = $taxCalculator->getTaxesAmountFromGross($itemRetailPrice);
                $itemDiscountTax = $taxCalculator->getTaxesAmountFromGross($itemDiscount);
                $itemDiscountPriceTax = $taxCalculator->getTaxesAmountFromGross($itemDiscountPrice);
                $taxes = $this->collectItemTaxes($totalTaxAmountArray);

                $cartItem->setTaxes(new Fieldcollection($taxes));

                $cartItem->setSubtotal((int) round($itemPrice * $quantity), true);
                $cartItem->setSubtotal($cartItem->getSubtotal(true) - $totalTaxAmount, false);

                $cartItem->setTotal($cartItem->getSubtotal(true), true);
                $cartItem->setTotal($cartItem->getSubtotal(false), false);

                $cartItem->setItemPrice($itemPrice, true);
                $cartItem->setItemPrice($itemPrice - $itemPriceTax, false);

                $cartItem->setItemRetailPrice($itemRetailPrice, true);
                $cartItem->setItemRetailPrice($itemRetailPrice - $itemRetailPriceTaxAmount, false);

                $cartItem->setItemDiscountPrice($itemDiscountPrice, true);
                $cartItem->setItemDiscountPrice($itemDiscountPrice - $itemDiscountPriceTax, false);

                $cartItem->setItemDiscount($itemDiscount, true);
                $cartItem->setItemDiscount($itemDiscount - $itemDiscountTax, false);
            } else {
                $totalTaxAmount = $taxCalculator->getTaxesAmount((int) round($itemPrice * $quantity));
                $totalTaxAmountArray = $taxCalculator->getTaxesAmountAsArray((int) round($itemPrice * $quantity));
                $itemPriceTax = $taxCalculator->getTaxesAmount($itemPrice);
                $itemRetailPriceTaxAmount = $taxCalculator->getTaxesAmount($itemRetailPrice);
                $itemDiscountTax = $taxCalculator->getTaxesAmount($itemDiscount);
                $itemDiscountPriceTax = $taxCalculator->getTaxesAmount($itemDiscountPrice);
                $taxes = $this->collectItemTaxes($totalTaxAmountArray);

                $cartItem->setTaxes(new Fieldcollection($taxes));

                $cartItem->setSubtotal((int) round($itemPrice * $quantity), false);
                $cartItem->setSubtotal((int) round($itemPrice * $quantity) + $totalTaxAmount, true);

                $cartItem->setTotal($cartItem->getSubtotal(true), true);
                $cartItem->setTotal($cartItem->getSubtotal(false), false);

                $cartItem->setItemPrice($itemPrice, false);
                $cartItem->setItemPrice($itemPrice + $itemPriceTax, true);

                $cartItem->setItemRetailPrice($itemRetailPrice, false);
                $cartItem->setItemRetailPrice($itemRetailPrice + $itemRetailPriceTaxAmount, true);

                $cartItem->setItemDiscountPrice($itemDiscountPrice, false);
                $cartItem->setItemDiscountPrice($itemDiscountPrice + $itemDiscountPriceTax, true);

                $cartItem->setItemDiscount($itemDiscount, false);
                $cartItem->setItemDiscount($itemDiscount + $itemDiscountTax, true);
            }
        } else {
            $cartItem->setSubtotal((int) round($itemPrice * $quantity), false);
            $cartItem->setSubtotal((int) round($itemPrice * $quantity), true);

            $cartItem->setTotal($cartItem->getSubtotal(true), true);
            $cartItem->setTotal($cartItem->getSubtotal(false), false);

            $cartItem->setItemPrice($itemPrice, true);
            $cartItem->setItemPrice($itemPrice, false);

            $cartItem->setItemRetailPrice($itemRetailPrice, false);
            $cartItem->setItemRetailPrice($itemRetailPrice, true);

            $cartItem->setItemDiscountPrice($itemDiscountPrice, false);
            $cartItem->setItemDiscountPrice($itemDiscountPrice, true);

            $cartItem->setItemDiscount($itemDiscount, false);
            $cartItem->setItemDiscount($itemDiscount, true);
        }

        if ($product instanceof ProductInterface) {
            /**
             * @var \CoreShop\Component\Core\Model\OrderItemInterface $cartItem
             */
            $cartItem->setDigitalProduct($product->getDigitalProduct());
        }
    }

    private function collectTaxes(int $i, array $taxes)
    {
        $usedTaxes = [];

        foreach ($taxes as $taxId => $splitted) {
            /**
             * @var TaxRateInterface|null $tax
             */
            $tax = $this->taxRateRepository->find($taxId);

            if (!$tax) {
                continue;
            }

            if ($splitted[$i] <= 0) {
                continue;
            }

            if (!array_key_exists($tax->getId(), $usedTaxes)) {
                /**
                 * @var TaxItemInterface $item
                 */
                $item = $this->taxItemFactory->createNew();
                $item->setName($tax->getName());
                $item->setRate($tax->getRate());
                $item->setTaxRate($tax);
                $item->setAmount($splitted[$i]);

                $usedTaxes[$tax->getId()] = $item;
            } else {
                $usedTaxes[$tax->getId()]->setAmount($usedTaxes[$tax->getId()]->getAmount() + $splitted[$i]);
            }
        }

        return $usedTaxes;
    }

    private function collectItemTaxes(array $taxes)
    {
        $usedTaxes = [];

        foreach ($taxes as $taxId => $amount) {
            /**
             * @var TaxRateInterface|null $tax
             */
            $tax = $this->taxRateRepository->find($taxId);

            if (!$tax) {
                continue;
            }

            if ($amount <= 0) {
                continue;
            }

            if (!array_key_exists($tax->getId(), $usedTaxes)) {
                /**
                 * @var TaxItemInterface $item
                 */
                $item = $this->taxItemFactory->createNew();
                $item->setName($tax->getName());
                $item->setRate($tax->getRate());
                $item->setTaxRate($tax);
                $item->setAmount($amount);

                $usedTaxes[$tax->getId()] = $item;
            } else {
                $usedTaxes[$tax->getId()]->setAmount($usedTaxes[$tax->getId()]->getAmount() + $amount);
            }
        }

        return $usedTaxes;
    }
}
