<?php

declare(strict_types=1);
/**
 * Calendar App
 *
 * @copyright 2021 Anna Larch <anna.larch@gmx.net>
 *
 * @author Anna Larch <anna.larch@gmx.net>
 * @author Richard Steinmetz <richard@steinmetz.cloud>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
 * License as published by the Free Software Foundation; either
 * version 3 of the License, or any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU AFFERO GENERAL PUBLIC LICENSE for more details.
 *
 * You should have received a copy of the GNU Affero General Public
 * License along with this library.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

namespace OCA\Gestion\Service;

use Exception;
use OCA\Gestion\Constants\GeoConstant;
use OCA\Gestion\Helpers\GeoHelpers;

class GeoService {

	public function __construct() {
	}

    /**
     * Calcul la distance entre les deux points à vol d'oiseau
     */
    private function getDistanceInKmBetweenTwoPoints($lat1, $lon1, $lat2, $lon2) {
        $R = 6371; // Rayon moyen de la Terre en kilomètres
        $dLat = deg2rad($lat2 - $lat1);
        $dLon = deg2rad($lon2 - $lon1);
        $a = sin($dLat/2) * sin($dLat/2) + cos(deg2rad($lat1)) * cos(deg2rad($lat2)) * sin($dLon/2) * sin($dLon/2);
        $c = 2 * atan2(sqrt($a), sqrt(1-$a));
        $d = $R * $c;
        return round($d, 2);
    }

    private function getTravelingHourBetweenTwoPoints(array $origin,array $destination,$mode = "driving"){
        $baseUrl = "https://api.geoapify.com/v1/routing";
        $originPoints = GeoHelpers::getPointsTextFromLatitudeAndLongitude($origin["latitude"],$origin["longitude"]);
        $destinationPoints = GeoHelpers::getPointsTextFromLatitudeAndLongitude($destination["latitude"],$destination["longitude"]);

        $fullUrl = $baseUrl."?waypoints=$originPoints|$destinationPoints&mode=$mode&apiKey=9e23d93e7f454c988344f9171bf867aa";
        $curl = curl_init();
        try {
            curl_setopt_array($curl, array(
                CURLOPT_URL => $fullUrl,
                CURLOPT_RETURNTRANSFER => true,
                CURLOPT_ENCODING => '',
                CURLOPT_MAXREDIRS => 10,
                CURLOPT_TIMEOUT => 0,
                CURLOPT_FOLLOWLOCATION => true,
                CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
                CURLOPT_CUSTOMREQUEST => 'GET',
            ));
    
            $response = curl_exec($curl);
    
            curl_close($curl);
    
            if ($response === false) {
                return 0;
            } else {
                $timeInSecondes = json_decode($response)->features[0]->properties->time;
                $travelTimeHours = $timeInSecondes / 3600;
                $travelTimeHours = round($travelTimeHours, 2);
                return $travelTimeHours;
            }
        }
        catch(Exception $e){
            return 0;
        }
    }

    public function getTotalDistanceAndTotalTravelingHoursBetweenDevisLocationByRouteLines(array $routeLines){
        $distanceCumul =  0;
        $totalTravelingHoursBetweenTwoDevisLocation = 0;
        $lastPoint = NULL;
        for ($i=0; $i < sizeof($routeLines); $i++) {
            $currentDistance = 0;
            if($routeLines[$i]['lieu_id'] != NULL){
                $lastPoint = $routeLines[$i];
            } 
            if($lastPoint['lieu_id'] != NULL && $routeLines[$i+1]['lieu_id'] != NULL){
                $currentDistance = $this->getDistanceInKmBetweenTwoPoints(
                    floatval(value: $lastPoint['latitude']), 
                    floatval($lastPoint['longitude']), 
                    floatval($routeLines[$i+1]['latitude']), 
                    floatval($routeLines[$i+1]['longitude'])
                );
                $targetIsBetweenTwoDevisLocation = $lastPoint['source'] != "siege" && $routeLines[$i+1]["source"] != "siege";
                if($targetIsBetweenTwoDevisLocation){
                    $originPoints = [
                        "latitude" => $lastPoint["latitude"],
                        "longitude" => $lastPoint["longitude"]
                    ];
                    $destinationPoints = [
                        "latitude" => $routeLines[$i+1]["latitude"],
                        "longitude" => $routeLines[$i+1]["longitude"]
                    ];
                    $totalTravelingHoursBetweenTwoDevisLocation+= $this->getTravelingHourBetweenTwoPoints(
                        $originPoints,
                        $destinationPoints,
                        GeoConstant::DRIVING_MODE
                    );
                }
            } 
            $distanceCumul += $currentDistance;
        }
        return [
            "totalDistance" => $distanceCumul,
            "totalTravelingHours" => $totalTravelingHoursBetweenTwoDevisLocation
        ];
    }
}