<?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 DDWMapsOSMHelper extends DDWMapsHelper
{
    /** @var bool|string */
    private $shop_email = '';

    public function __construct()
    {
        $this->shop_email = Configuration::get('PS_SHOP_EMAIL');
    }

    /**
     * Get Address from postcode and country
     * @param $postcode
     * @param $country
     */
    public function getAddress($postcode, $country)
    {
        $postcode = urlencode($postcode);
        $result = Tools::file_get_contents('https://nominatim.openstreetmap.org/search?country=' . $country . '&postalcode=' . $postcode . '&format=json&email=' . $this->shop_email);
        $result = json_decode($result);

        if (empty($result['0'])) {
            return '';
        } else {
            return $result['0']->display_name;
        }
    }

    /**
     * @param $postcode
     * @return array
     */
    private function getCoordinateForPostcode($postalcode, $country)
    {
        $result = Tools::file_get_contents('https://nominatim.openstreetmap.org/search?country=' . $country . '&postalcode=' . $postalcode . '&format=json&email=' . $this->shop_email);
        $result = json_decode($result);

        if (empty($result['0'])) {
            return false;
        }
        $return = array(
            'lat' => $result[0]->lat,
            'lon' => $result[0]->lon,
        );
        return $return;
    }

    /**
     * Return the distance between two points on a map
     * @param $source
     * @param $destination
     * @return int
     */
    private function getDistanceBetweenTwoPoints($source, $destination)
    {
        $url = 'http://router.project-osrm.org/route/v1/driving/' . $source['lon'] . ',' . $source['lat'] . ';' . $destination['lon'] . ',' . $destination['lat'] . '?overview=false';
        $result = Tools::file_get_contents($url);
        $result = json_decode($result);

        if (!empty($result->routes[0]->legs)) {
            $distance = (int)$result->routes[0]->legs[0]->distance;
        }
        return $distance;
    }

    /**
     * @param $source_address
     * @param array $destination_addresses
     */
    public function getDistancesByPostCodes($source_address, array $destination_addresses)
    {
        $source_address['location'] = $this->getCoordinateForPostcode($source_address['postal_code'], $source_address['country']);

        if (empty($source_address['location'])) {
            return array();
        }

        foreach ($destination_addresses as &$destination_address) {
            $destination_address['location'] = $this->getCoordinateForPostcode($destination_address['postal_code'], $destination_address['country']);
        }

        unset($destination_address);

        // now get the distances between each carrier and customer
        foreach ($destination_addresses as &$destination_address) {
            if (!empty($destination_address['location'])) {
                $destination_address['distance'] = $this->getDistanceBetweenTwoPoints($source_address['location'], $destination_address['location']) / 1000;
            }
        }

        // return the array expected
        $carrier_distances = array();
        foreach ($destination_addresses as $address) {
            if (!empty($address['distance'])) {
                $distance = $address['distance'];
            } else {
                $distance = 0;
            }

            $carrier_distances[$address['id_carrier']] = array(
                'id_carrier' => $address['id_carrier'],
                'country' => $address['country'],
                'postal_code' => $address['postal_code'],
                'distance' => $distance,
            );
        }
        return $carrier_distances;
    }
}