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<?php
/**
 * Copyright (c) 2021 Kaliop Digital Commerce (https://digitalcommerce.kaliop.com) All Rights Reserved.
 * https://opensource.org/licenses/OSL-3.0  Open Software License (OSL 3.0)
 * Cnc
 * Krzysztof Majkowski <[email protected]> <[email protected]>
 */

namespace Cnc\Checkout\Helper;

use Cnc\Catalog\Helper\Data as CncCatalogHelper;
use Cnc\Catalog\Model\Attribute\MsiAttributes;
use Cnc\Checkout\Api\GetAssignedSourceCodesBySkuInterface;
use Cnc\Checkout\Api\GetAssignedSourceCodesInterface;
use Ecombricks\InventoryInventorySales\Api\GetProductSalableQtyInterface;
use Magento\Catalog\Api\Data\ProductInterface;
use Magento\Framework\App\Config\ScopeConfigInterface;
use Magento\Framework\Exception\LocalizedException;
use Magento\Quote\Model\Quote\Item;
use Magento\Store\Model\ScopeInterface;
use Magento\Store\Model\StoreManagerInterface;

class Cart
{
    /**
     * @var GetProductSalableQtyInterface
     */
    private $getProductSalableQty;

    /**
     * @var GetAssignedSourceCodesInterface
     */
    private $getAssignedSourceCodes;

    /**
     * @var MsiAttributes
     */
    private $msiAttributes;

    /**
     * @var ScopeConfigInterface
     */
    private $scopeConfig;

    /**
     * @var StoreManagerInterface
     */
    private $storeManager;

    /**
     * @var CncCatalogHelper
     */
    private $helper;

    /**
     * @var array
     */
    private $sourcesByWebsite = [];

    /**
     * @var GetAssignedSourceCodesBySkuInterface
     */
    private $getAssignedSourceCodesBySku;

    /**
     * Cart constructor.
     * @param ScopeConfigInterface $scopeConfig
     * @param StoreManagerInterface $storeManager
     * @param GetProductSalableQtyInterface $getProductSalableQty
     * @param GetAssignedSourceCodesInterface $getAssignedSourceCodes
     * @param MsiAttributes $msiAttributes
     * @param CncCatalogHelper $helper
     * @param GetAssignedSourceCodesBySkuInterface $getAssignedSourceCodesBySku
     */
    public function __construct(
        ScopeConfigInterface $scopeConfig,
        StoreManagerInterface $storeManager,
        GetProductSalableQtyInterface $getProductSalableQty,
        GetAssignedSourceCodesInterface $getAssignedSourceCodes,
        MsiAttributes $msiAttributes,
        CncCatalogHelper $helper,
        GetAssignedSourceCodesBySkuInterface $getAssignedSourceCodesBySku
    ) {
        $this->getProductSalableQty = $getProductSalableQty;
        $this->getAssignedSourceCodes = $getAssignedSourceCodes;
        $this->msiAttributes = $msiAttributes;
        $this->scopeConfig = $scopeConfig;
        $this->storeManager = $storeManager;
        $this->helper = $helper;
        $this->getAssignedSourceCodesBySku = $getAssignedSourceCodesBySku;
    }

    /**
     * @return bool
     */
    public function isBackorderEnabled()
    {
        return $this->scopeConfig->isSetFlag(
            'cataloginventory/item_options/backorders',
            ScopeInterface::SCOPE_STORE
        );
    }

    /**
     * @param string $sku
     * @param string $sourceCode
     * @return bool
     */
    public function isBackorderEnabledForProductAndSource(string $sku, string $sourceCode)
    {
        $vhsAttributeId = $this->msiAttributes->getAttributeId('cnc_vhs');
        return (bool) $this->msiAttributes->getAttributeValue(
            $vhsAttributeId,
            $sku,
            $sourceCode
        )->getValue();
    }

    /**
     * Get source data per product.
     * If items ($cart->getItems()) is added then availability will be decreased by qty in cart.
     *
     * @param $sku
     * @param null $items
     * @return array|array[]
     * @throws LocalizedException
     * @throws \Magento\Framework\Exception\InputException
     */
    public function getSourceDataForProduct($sku, $items = null): array
    {
        if ($sku instanceof ProductInterface) {
            $sku = $sku->getSku();
        }
        $productSources = $this->getAssignedSourceCodesBySku->execute($sku);

        $data = ['sources' => []];
        $max = 0;
        foreach ($this->getSourcePriority() as $sourceCode) {
            if (!in_array($sourceCode, $productSources)) {
                continue;
            }

            if ($this->helper->getCncAvailabilityValue($sku, $sourceCode) == 'Out of stock') {
                $available = 0;
                $max += $available;
                $data['sources'][$sourceCode] = $available;
                continue;
            }

            $available = $this->getProductSalableQty->execute($sku, $sourceCode);
            if ($items && count($items)) {
                /** @var Item $item */
                foreach ($items as $item) {
                    if ($item->getSku() == $sku) {
                        $option = $item->getOptionByCode('source');
                        if ($option && $option->getValue() == $sourceCode) {
                            $available -= $item->getQty();
                        }
                    }
                }
            }

            $available = max(0, $available);
            $max += $available;
            $data['sources'][$sourceCode] = $available;

            if ($this->isBackorderEnabled() &&
                $this->isBackorderEnabledForProductAndSource($sku, $sourceCode)) {
                $max = 999;
                $data['sources'][$sourceCode] = 999;
            }
        }

        $data['max'] = $max;
        return $data;
    }

    /**
     * Get source codes by priority.
     *
     * @return string[]
     * @throws LocalizedException
     */
    public function getSourcePriority(): array
    {
        $code = $this->storeManager->getWebsite()->getCode();
        if (!isset($this->sourcesByWebsite[$code])) {
            $sources = $this->getAssignedSourceCodes->execute($code);
            $this->sourcesByWebsite[$code] = $sources;
        }

        return $this->sourcesByWebsite[$code];
    }
}