<?php

namespace Stemcell\Quote\Model;

class Quote extends \Magento\Quote\Model\Quote
{
    /**
     * 客户要求同一个产品(即使相同的子产品)，多次加入购物车，不能合并到同一个item。因为订货账户会不一样
     * @param $product
     * @return false
     */
    public function getItemByProduct($product)
    {
        return false;
    }

    protected function addCustomDataToItem($item, $request): void
    {
        $fields = ['lab_id', 'cd', 'quote', 'customer_discount_percent', 'note', 'item_sort'];
        foreach ($fields as $field) {
            $item->setData($field, $request->getData($field));
        }
    }

    public function addProduct(
        \Magento\Catalog\Model\Product $product,
                                       $request = null,
                                       $processMode = \Magento\Catalog\Model\Product\Type\AbstractType::PROCESS_MODE_FULL
    ) {
        if ($request === null) {
            $request = 1;
        }
        if (is_numeric($request)) {
            $request = $this->objectFactory->create(['qty' => $request]);
        }
        if (!$request instanceof \Magento\Framework\DataObject) {
            throw new \Magento\Framework\Exception\LocalizedException(
                __('We found an invalid request for adding product to quote.')
            );
        }

        if (!$product->isSalable()) {
            throw new \Magento\Framework\Exception\LocalizedException(
                __('Product that you are trying to add is not available.')
            );
        }

        $cartCandidates = $product->getTypeInstance()->prepareForCartAdvanced($request, $product, $processMode);

        /**
         * Error message
         */
        if (is_string($cartCandidates) || $cartCandidates instanceof \Magento\Framework\Phrase) {
            return (string)$cartCandidates;
        }

        /**
         * If prepare process return one object
         */
        if (!is_array($cartCandidates)) {
            $cartCandidates = [$cartCandidates];
        }

        $parentItem = null;
        $errors = [];
        $item = null;
        $items = [];
        foreach ($cartCandidates as $candidate) {
            // Child items can be sticked together only within their parent
            $stickWithinParent = $candidate->getParentProductId() ? $parentItem : null;
            $candidate->setStickWithinParent($stickWithinParent);

            $item = $this->getItemByProduct($candidate);
            if (!$item) {
                $item = $this->itemProcessor->init($candidate, $request);
                $item->setQuote($this);
                $item->setOptions($candidate->getCustomOptions());
                $item->setProduct($candidate);
                $this->addCustomDataToItem($item, $request);
                // Add only item that is not in quote already
                $this->addItem($item);
            }
            $items[] = $item;

            /**
             * As parent item we should always use the item of first added product
             */
            if (!$parentItem) {
                $parentItem = $item;
            }
            if ($parentItem && $candidate->getParentProductId() && !$item->getParentItem()) {
                $item->setParentItem($parentItem);
            }

            $this->itemProcessor->prepare($item, $request, $candidate);

            // collect errors instead of throwing first one
            if ($item->getHasError()) {
                $this->deleteItem($item);
                foreach ($item->getMessage(false) as $message) {
                    if (!in_array($message, $errors)) {
                        // filter duplicate messages
                        $errors[] = $message;
                    }
                }
                break;
            }
        }
        if (!empty($errors)) {
            throw new \Magento\Framework\Exception\LocalizedException(__(implode("\n", $errors)));
        }

        $this->_eventManager->dispatch('sales_quote_product_add_after', ['items' => $items]);
        return $parentItem;
    }

    public function getItemsCollection($useCache = true)
    {
        if ($this->hasItemsCollection() && $useCache) {
            return $this->getData('items_collection');
        }
        if (null === $this->_items || !$useCache) {
            $this->_items = $this->_quoteItemCollectionFactory->create();
            $this->_items->setOrder('item_sort', 'asc');
            $this->extensionAttributesJoinProcessor->process($this->_items);
            $this->_items->setQuote($this);
        }
        return $this->_items;
    }

}