<?php
/**
 * User: ssh
 * Date: 2019/11/20
 * Time: 23:21
 */

namespace common\components;

use linslin\yii2\curl;
use yii\helpers\Json;

class mapUtil
{

    public static $thirdMapKey = 'd4ab169335937fb56581ba15ea1bd1a1';

    public static function suggestion($region, $keyword)
    {
        if (getenv('YII_ENV') == 'production') {
            $url = "https://restapi.amap.com/v3/assistant/inputtips?city={$region}&keywords={$keyword}&key=" . self::$thirdMapKey;
        } else {
            $url = "http://restapi.amap.com/v3/assistant/inputtips?city={$region}&keywords={$keyword}&key=" . self::$thirdMapKey;
        }
        $curl = new curl\Curl();
        $result = $curl->get($url);
        return Json::decode($result);
    }

    //计算距离 lng经度 lat纬度 ssh 2020.5.14
    public static function calculateDistance($fromLnt, $fromLat, $toLnt, $toLat)
    {
        if (getenv('YII_ENV') == 'production') {
            $url = "https://restapi.amap.com/v5/direction/electrobike?key=" . self::$thirdMapKey . '&origin=' . $fromLnt . ',' . $fromLat . '&destination=' . $toLnt . ',' . $toLat;
        } else {
            $url = "http://restapi.amap.com/v5/direction/electrobike?key=" . self::$thirdMapKey . '&origin=' . $fromLnt . ',' . $fromLat . '&destination=' . $toLnt . ',' . $toLat;
        }
        $curl = new curl\Curl();
        $result = $curl->get($url);
        $result = Json::decode($result);
        $distance = 0;
        if (!empty($result['status']) && $result['status'] == 1) {
            $path = $result['route']['paths'] ?? [];
            $current = $path[0] ?? [];
            $distance = $current['distance'] ?? 0;
        }
        return $distance;
    }

    /**
     * 批量计算多个起点到一个终点的距离 (高德 V3 距离测量接口)
     * @param array $origins 起点坐标数组，例如：[['lng' => '116.481028', 'lat' => '39.989643'], ...]
     * @param string $toLnt 终点经度
     * @param string $toLat 终点纬度
     * @param int $type 路径计算的方式和方法 (0:直线距离, 1:驾车, 3:步行)
     * @return array
     */
    public static function calculateBatchDistance($origins, $toLnt, $toLat, $type = 1)
    {
        if (empty($origins)) {
            return [];
        }

        // 将起点数组拼接成高德要求的格式: lng1,lat1|lng2,lat2
        $originStrs = [];
        foreach ($origins as $origin) {
            $originStrs[] = $origin['lng'] . ',' . $origin['lat'];
        }
        $originsParam = implode('|', $originStrs);
        $destinationParam = $toLnt . ',' . $toLat;

        $domain = getenv('YII_ENV') == 'production' ? 'https://restapi.amap.com' : 'http://restapi.amap.com';
        $url = $domain . "/v3/distance?key=" . self::$thirdMapKey . "&origins={$originsParam}&destination={$destinationParam}&type={$type}";

        $curl = new curl\Curl();
        $result = $curl->get($url);
        $result = \yii\helpers\Json::decode($result);
        $distances = [];
        if (!empty($result['status']) && $result['status'] == 1 && !empty($result['results'])) {
            foreach ($result['results'] as $index => $res) {
                // 返回的结果顺序与传入的 origins 顺序一致
                $distances[$index] = $res['distance'] ?? 0; 
            }
        }else{
            noticeUtil::push("高德批量测距接口返回失败：".json_encode($result)." url:".$url);
        }
        
        return $distances;
    }

    //逆地址解析，根据经纬度解析出中文地址 ssh
    public static function resolveLocation($lat, $long)
    {
        $url = "https://apis.map.qq.com/ws/geocoder/v1/?location={$lat},{$long}&get_poi=0&key=" . self::$thirdMapKey;
        $curl = new curl\Curl();
        $result = $curl->get($url);
        $result = Json::decode($result);
        return $result;
    }

    /**
     * 坐标系转换：从 WGS84 转换为 GCJ-02
     * @param $lng
     * @param $lat
     * @return array
     */
    public static function wgs84ToGcj02($lng, $lat)
    {
        $lng = (float)$lng;
        $lat = (float)$lat;
        if (self::outOfChina($lng, $lat)) {
            return ['lng' => $lng, 'lat' => $lat];
        }

        $a = 6378245.0;
        $ee = 0.00669342162296594323;
        $dLat = self::transformLat($lng - 105.0, $lat - 35.0);
        $dLng = self::transformLng($lng - 105.0, $lat - 35.0);
        $radLat = $lat / 180.0 * M_PI;
        $magic = sin($radLat);
        $magic = 1 - $ee * $magic * $magic;
        $sqrtMagic = sqrt($magic);
        $dLat = ($dLat * 180.0) / (($a * (1 - $ee)) / ($magic * $sqrtMagic) * M_PI);
        $dLng = ($dLng * 180.0) / ($a / $sqrtMagic * cos($radLat) * M_PI);

        return ['lng' => $lng + $dLng, 'lat' => $lat + $dLat];
    }

    private static function transformLat($lng, $lat)
    {
        $ret = -100.0 + 2.0 * $lng + 3.0 * $lat + 0.2 * $lat * $lat + 0.1 * $lng * $lat + 0.2 * sqrt(abs($lng));
        $ret += (20.0 * sin(6.0 * $lng * M_PI) + 20.0 * sin(2.0 * $lng * M_PI)) * 2.0 / 3.0;
        $ret += (20.0 * sin($lat * M_PI) + 40.0 * sin($lat / 3.0 * M_PI)) * 2.0 / 3.0;
        $ret += (160.0 * sin($lat / 12.0 * M_PI) + 320.0 * sin($lat * M_PI / 30.0)) * 2.0 / 3.0;
        return $ret;
    }

    private static function transformLng($lng, $lat)
    {
        $ret = 300.0 + $lng + 2.0 * $lat + 0.1 * $lng * $lng + 0.1 * $lng * $lat + 0.1 * sqrt(abs($lng));
        $ret += (20.0 * sin(6.0 * $lng * M_PI) + 20.0 * sin(2.0 * $lng * M_PI)) * 2.0 / 3.0;
        $ret += (20.0 * sin($lng * M_PI) + 40.0 * sin($lng / 3.0 * M_PI)) * 2.0 / 3.0;
        $ret += (150.0 * sin($lng / 12.0 * M_PI) + 300.0 * sin($lng / 30.0 * M_PI)) * 2.0 / 3.0;
        return $ret;
    }

    private static function outOfChina($lng, $lat)
    {
        if ($lng < 72.004 || $lng > 137.8347) {
            return true;
        }
        if ($lat < 0.8293 || $lat > 55.8271) {
            return true;
        }
        return false;
    }
}