<?php

namespace Stemcell\SubItemProduct\Observer;

use Magento\Catalog\Api\ProductRepositoryInterface;
use Magento\Catalog\Model\ProductType;
use Magento\CatalogInventory\Api\RegisterProductSaleInterface;
use Magento\CatalogInventory\Observer\ItemsForReindex;
use Magento\ConfigurableProduct\Model\Product\Type\Configurable;
use Magento\Framework\Api\FilterBuilder;
use Magento\Framework\Api\Search\SearchCriteriaBuilder;
use Magento\Framework\Event\Observer;
use Magento\Framework\Event\ObserverInterface;
use Magento\Framework\Exception\LocalizedException;
use Magento\Framework\Exception\NoSuchEntityException;
use Magento\InventoryApi\Api\GetSourceItemsBySkuInterface;
use Magento\InventoryReservationsApi\Model\AppendReservationsInterface;
use Magento\InventoryReservationsApi\Model\ReservationBuilderInterface;
use Magento\InventorySales\Model\ResourceModel\GetAssignedStockIdForWebsite;
use Magento\InventorySalesApi\Api\Data\SalesEventInterface;
use Magento\Sales\Model\Order;
use Psr\Log\LoggerInterface;
use Stemcell\SubItemProduct\Model\SubItemRepository;
use \Magento\InventoryApi\Api\SourceItemsSaveInterface;
use Stemcell\SubItemProduct\Model\ResourceModel\SubItem as SubItemResourceModel;

class SubtractSubItemInventory implements ObserverInterface
{
    protected array $subProductsParent = [];
    const DEFAULT_SOURCE_CODE = 'default';

    protected array $subItems = [];

    public function __construct(
        protected GetSourceItemsBySkuInterface $getSourceItemsBySku,
        protected SubItemRepository $subItemRepository,
        protected ProductRepositoryInterface $productRepository,
        protected SearchCriteriaBuilder $searchCriteriaBuilder,
        protected FilterBuilder $filterBuilder,
        protected ReservationBuilderInterface $reservationBuilder,
        protected AppendReservationsInterface $appendReservations,
        protected GetAssignedStockIdForWebsite $getAssignedStockIdForWebsite,
        protected SourceItemsSaveInterface $sourceItemsSave,
        protected LoggerInterface $logger,
        protected SubItemResourceModel $subItemResourceModel,
    ){
    }

    /**
     * @param Order\Item $orderItem
     * @return void
     * @throws LocalizedException
     * @throws NoSuchEntityException
     */
    protected function getSubItemsFromOrderItem(Order\Item $orderItem)
    {
        $criteria = $this->searchCriteriaBuilder->addFilter(
            $this->filterBuilder->setField('product_id')->setValue($orderItem->getProductId())->create()
        )
            ->create();

        $result = $this->subItemRepository->getList($criteria);
        $this->logger->debug(sprintf('$orderItem product sku %s, id:%d contains %d', $orderItem->getSku(), $orderItem->getProductId(), $result->getTotalCount()));
        foreach ($result->getItems() as $subItem) {
            $this->logger->debug(sprintf(' %s, id:%d contains', $orderItem->getSku(), $orderItem->getProductId()), $subItem->getData());
            $subProduct = $this->productRepository->getById($subItem->getSubProductId());
            if (isset($items[$subItem->getSubProductId()])) {
                $this->subItems[$subItem->getSubProductId()]['qty'] += $orderItem->getQtyOrdered() * intval($subItem->getQuality());
            } else {
                $this->subItems[$subItem->getSubProductId()] = [
                    'qty' => $orderItem->getQtyOrdered() * intval($subItem->getQuality()),
                    'sku' => $subProduct->getSku(),
                ];
            }
            $this->subProductsParent[$subItem->getSubProductId()] = $orderItem->getSku();
        }
    }
    /**
     * @param Order\Item $orderItem
     * @return void
     */
    protected function getSubItemQtyOrdered(Order\Item $orderItem)
    {
        try {
            $this->getSubItemsFromOrderItem($orderItem);
            $this->logger->debug('$this->subItems: ', $this->subItems);
            $sourceItems = [];
            foreach ($this->subItems as $subItem) {
                $items = $this->getSourceItemsBySku->execute($subItem['sku']);
                foreach ($items as $sourceItem) {
                    if ($sourceItem->getSourceCode() === self::DEFAULT_SOURCE_CODE) {
                        $this->logger->debug(sprintf('source item %s, product sku: %s, product stock:%f, qty:%d', $sourceItem->getSourceCode(), $subItem['sku'], $sourceItem->getQuantity(), $subItem['qty']));
                        $newQty = $sourceItem->getQuantity() - $subItem['qty'];
                        $sourceItem->setQuantity($newQty);
                        $sourceItems[] = $sourceItem;
                    }
                }

            }
            if (!empty($sourceItems)) {
                $this->sourceItemsSave->execute($sourceItems);
            }

        } catch (LocalizedException $e) {
            $this->logger->critical('subitem getSubItemQtyOrdered error: '.$e->getMessage(), $e->getTrace());
        }
    }

    /**
     * @param Order $order
     * @param array $items
     * @return void
     * @throws NoSuchEntityException
     * @throws \Magento\Framework\Exception\CouldNotSaveException
     * @throws \Magento\Framework\Exception\InputException
     * @throws \Magento\Framework\Validation\ValidationException
     */
    protected function appendReservations(Order $order, array $items)
    {
        $stockId = $this->getAssignedStockIdForWebsite->execute($order->getStore()->getWebsite()->getCode());
        $reservations = [];
        foreach ($items as $subProductId => $item) {
            $reservations[] = $this->reservationBuilder->setSku($item['sku'])
                ->setQuantity(-$item['qty'])
                ->setStockId($stockId)
                ->setMetadata(
                    json_encode([
                        'event_type'=>SalesEventInterface::EVENT_ORDER_PLACED,
                        'object_type'=>SalesEventInterface::OBJECT_TYPE_ORDER,
                        'object_id'=>$order->getId(),
                        'object_increment_id' => $order->getIncrementId(),
                        'comment' => 'sub product of '.$this->subProductsParent[$subProductId],
                    ])
                )
            ->build();
        }

        $this->appendReservations->execute($reservations);
    }

    public function execute(Observer $observer)
    {
        /* @var $order Order */
        $order = $observer->getData('order');

        /* @var $item Order\Item */
        foreach ($order->getAllVisibleItems() as $item) {
            $qty = (int)$item->getQtyOrdered();


            try {
                $product = $this->productRepository->get($item->getSku());
                $this->subItemResourceModel->getConnection()->query("
                    update subitem_product set stock_qty = stock_qty - (bundle_qty*$qty)
                    where product_id={$product->getEntityId()};
                ");
            } catch (NoSuchEntityException $e) {

            }
        }
    }
}