<?php
/**
 * NOTICE OF LICENSE
 *
 * This file is licenced under the Software License Agreement.
 * With the purchase or the installation of the software in your application
 * you accept the licence agreement.
 *
 * You must not modify, adapt or create derivative works of this source code
 *
 * @author    Musaffar Patel
 * @copyright 2016-2020 Musaffar Patel
 * @license   LICENSE.txt
 */

class DDWCheckoutHelper
{
    /** @var  */
    protected static $_cache;

    /**
     * Filters the delivery option list based on distances
     * @param $delivery_options*
     * @param Country|null $default_country
     * @param bool $flush
     */
    public static function filterDeliveryOptionList($delivery_options, Country $default_country = null, $flush = false)
    {
        if (Tools::getValue('controller') != 'order' && Tools::getValue('controller') != 'supercheckout' && Tools::getValue('controller') != 'amzpayments') {
             return $delivery_options;
        }

        $delivery_options_filtered = array();
        $carrier_geo_addresses = array();
        $cache_id = 'cart::getDeliveryOptionList::carrier_distances';

        if (empty($delivery_options)) {
            return $delivery_options;
        }

        if ((int)Tools::getValue('id_address_delivery') > 0) {
            $id_address = (int)Tools::getValue('id_address_delivery');
        } else {
            $id_address = Context::getContext()->cart->id_address_delivery;
        }

        if (empty($delivery_options[$id_address])) {
            return $delivery_options;
        }

        $address = new Address($id_address);
        $customer_country = new Country($address->id_country);
        $customer_geo_address = array(
            'country' => $customer_country->iso_code,
            'postal_code' => $address->postcode
        );

        if (DDWMapsHelper::getMapsApiService() == 'openmaps') {
            $ddw_maps_helper = new DDWMapsOSMHelper();
        } else {
            $ddw_maps_helper = new DDWMapsGoogleHelper();
        }

        foreach ($delivery_options[$id_address] as $key => $value) {
            //$address->postcode = str_replace(' ', '', $address->postcode);
            $id_carrier = Tools::str_replace_once(',', '', $key);
            $carrier = new Carrier($id_carrier);

            if ((int)$carrier->id_reference == 0) {
                continue;
            }

            $ddw_carrier_distance = DDWCarrierDistanceHelper::getByCarrier($id_carrier, Context::getContext()->shop->id);

            if ($ddw_carrier_distance->distance_enabled) {
                $carrier_geo_addresses[] = array(
                    'id_carrier' => $id_carrier,
                    'country' => $ddw_carrier_distance->carrier_country_iso,
                    'postal_code' => $ddw_carrier_distance->carrier_postal_code
                );
            }

            // if disabled then ensure carrier is shown
            if (!$ddw_carrier_distance->distance_enabled) {
                $delivery_options_filtered[$id_address][$key] = $value;
            }
        }

        if (empty($carrier_geo_addresses)) {
            return $delivery_options;
        }

        if (!isset(self::$_cache[$cache_id])) {
            $carrier_distances = $ddw_maps_helper->getDistancesByPostCodes($customer_geo_address, $carrier_geo_addresses);
            self::$_cache[$cache_id] = $carrier_distances;
        } else {
            $carrier_distances = self::$_cache[$cache_id];
        }

        foreach ($delivery_options[$id_address] as $key => $value) {
            $id_carrier = Tools::str_replace_once(',', '', $key);
            $ddw_carrier_distance = DDWCarrierDistanceHelper::getByCarrier($id_carrier, Context::getContext()->shop->id);

            if (!empty($carrier_distances[$id_carrier])) {
                $distance = (float)$carrier_distances[$id_carrier]['distance'];
                if (($distance >= $ddw_carrier_distance->radius_from_km && $distance <= $ddw_carrier_distance->radius_to_km) || $distance == 0) {
                    $delivery_options_filtered[$id_address][$key] = $value;
                }
            } else {
                $delivery_options_filtered[$id_address][$key] = $value;
            }
        }
        return $delivery_options_filtered;
    }
}