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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]>
 */

namespace Cnc\Checkout\Model;

use Cnc\Checkout\Api\Data\DeliveryEstimationInterface;
use Cnc\Checkout\Api\EstimateDeliveryInterface;
use Cnc\Checkout\Model\ResourceModel\DeliveryEstimationModel\DeliveryEstimationCollection;
use Cnc\Checkout\Model\ResourceModel\DeliveryEstimationModel\DeliveryEstimationCollectionFactory;
use Magento\Checkout\Model\Session;
use Magento\Framework\Serialize\SerializerInterface;
use Magento\Framework\Stdlib\DateTime\TimezoneInterface;

class EstimateDelivery implements EstimateDeliveryInterface
{
    /**
     * @var DeliveryEstimationCollection
     */
    private $collection;

    /**
     * @var SerializerInterface
     */
    private $serializer;

    /**
     * @var TimezoneInterface
     */
    private $timezone;

    /**
     * @var Session
     */
    private $checkoutSession;

    /**
     * EstimateDelivery constructor.
     * @param DeliveryEstimationCollectionFactory $collectionFactory
     * @param SerializerInterface $serializer
     * @param TimezoneInterface $timezone
     * @param Session $checkoutSession
     */
    public function __construct(
        DeliveryEstimationCollectionFactory $collectionFactory,
        SerializerInterface $serializer,
        TimezoneInterface $timezone,
        Session $checkoutSession
    ) {
        $this->collection = $collectionFactory->create();
        $this->serializer = $serializer;
        $this->timezone = $timezone;
        $this->checkoutSession = $checkoutSession;
    }

    /**
     * @return string
     * @throws \Magento\Framework\Exception\LocalizedException
     * @throws \Magento\Framework\Exception\NoSuchEntityException
     */
    public function executeByQuote()
    {
        $quote = $this->checkoutSession->getQuote();
        if ($quote) {
            $countryCode = $quote->getShippingAddress()->getCountry();
            $method = $quote->getShippingAddress()->getShippingMethod();
            if (is_array($method) && count($method)) {
                foreach ($method as $key => $value) {
                    $method = $value;
                    break;
                }
            }

            if ($countryCode && $method) {
                return $this->execute($countryCode, $method);
            }
        }

        return '';
    }

    /**
     * @param string $countryCode
     * @param string $shippingMethod
     * @return string
     */
    public function execute(string $countryCode, string $shippingMethod)
    {
        if (strpos($shippingMethod, 'matrixrate_matrixrate') !== false) {
            $shippingMethod = 'matrixrate_matrixrate';
        }

        /** @var DeliveryEstimationInterface $item */
        foreach ($this->collection as $item) {
            if ($item->getCountryCode() !== $countryCode) {
                continue;
            }

            $estimations = $this->serializer->unserialize($item->getEstimation());
            if (!is_array($estimations)) {
                break;
            }

            if (isset($estimations[$shippingMethod]) && ((int) $estimations[$shippingMethod]) > 0) {
                return $this->calculateDate($estimations[$shippingMethod]);
            }
        }

        return '';
    }

    protected function calculateDate(int $shippingTime)
    {
        $currentDate = $this->timezone->date(new \DateTime());
        if (strtotime($currentDate->format('H:i:m')) > strtotime('16:30:00')) {
            $shippingTime++;
        }
        if ($this->isFriday($currentDate)) {
            $shippingTime += 3;
        }
        if ($this->isWeekend($currentDate)) {
            $shippingTime += 2;
        }

        return $currentDate
            ->modify(sprintf('+%d days', $shippingTime))
            ->format('d/m/y');
    }

    protected function isWeekend($date)
    {
        return $date->format('N') >= 6;
    }

    protected function isFriday($date)
    {
        return $date->format('N') == 5;
    }
}