<?php
class Geocode
{
    public static function geocodeAddress($address)
    {
        global $httpAuthToken, $oauth_api;
        if (!empty($address)) {
            $data = http_build_query(
                array(
                    'address' => $address,
                )
            );
            $url = $oauth_api . "geocode?" . $data;
            $opts = array(
                'http' => array(
                    'method' => "GET",
                    'timeout' => 60, /* 1 minute */
                    'header' =>
                    "Content-Type: application/x-www-form-urlencoded\r\n" .
                    "Accept: application/json\r\n" .
                    "Authorization: Server-Token ${httpAuthToken}\r\n",
                ),
            );
            $context = stream_context_create($opts);
            $body = file_get_contents($url, false, $context);
            $geocoded = json_decode($body, true);
            if (is_array($geocoded) && isset($geocoded["data"]) && !isset($geocoded["error"])) {
                return $geocoded["data"];
            }
        }
        return null;
    }

    public static function reverseGPS($latitude, $longitude)
    {
        global $httpAuthToken, $oauth_api;
       
        $body = null;
        if (!empty($latitude && !empty($longitude))) {
            $data = http_build_query(
                array(
                    'lat' => $latitude,
                    'lng' => $longitude,
                )
            );

            $url = $oauth_api . "reverse?" . $data;
            $opts = array(
                'http' => array(
                    'method' => "GET",
                    'timeout' => 60, /* 1 minute */
                    'header' =>
                    "Content-Type: application/x-www-form-urlencoded\r\n" .
                    "Accept: application/json\r\n" .
                    "Authorization: Server-Token ${httpAuthToken}\r\n",
                ),
            );
            $context = stream_context_create($opts);
            $body = file_get_contents($url, false, $context);
            $geocoded = json_decode($body, true);

            if (is_array($geocoded) && isset($geocoded["data"]) && !isset($geocoded["error"])) {
                return $geocoded["data"];

            }
        }
        return null;
    }

    public function getTimeZone($lat, $lng)
    {
        global $googleKey;
        $result = array("message" => "Unexpected error", "dstOffset" => 0, "rawOffset" => 0, "status" => "Error", "timeZoneId" => "", "timeZoneName" => "");
        $url = "https://maps.googleapis.com/maps/api/timezone/json?location=${lat},${lng}&timestamp=" . time() . "&key=" . $googleKey;
        $resp_json = file_get_contents($url);
        $resp = json_decode($resp_json, true);
        if ($resp["status"] == 'OK') {
            $result = $resp;
            if ($resp["timeZoneId"] != "") {
                $result["message"] = "";
            } else {
                $result["message"] = "Failed to get timezone offset for: ${lat},${lng}\n";
            }
        } else {
            $result["message"] = "Invalid service response code\n";
        }
        return $result;
    }

    public static function getGeoInfoBigDataCloud($latitude, $longitude)
    {
        global $city_keywords;
        $url = "https://api.bigdatacloud.net/data/reverse-geocode-client?latitude=" . $latitude . "&longitude=" . $longitude . "&localityLanguage=en";
        $opts = array(
            'http' => array(
                'method' => "GET",
            ),
        );

        $context = stream_context_create($opts);
        $body = file_get_contents($url, false, $context);
        $geoinfo = json_decode($body, true);
        if (count($geoinfo) > 0 && isset($geoinfo['localityInfo'])) {
            $localities = $geoinfo['localityInfo']['administrative'];
            foreach ($localities as $k => $v) {
                $name = isset($v['name']) ? $v['name'] : "";
                $description = isset($v['description']) ? $v['description'] : "";
                $info = strtolower($name . $description);
                foreach ($city_keywords as $key) {
                    if (strpos($info, $key) !== false) {
                        return $v['name'];
                    }
                }
            }

        }
        return null;

    }

}