<?php

use GuzzleHttp\Client;
use Psr\Http\Message\ResponseInterface;
use traits\think\Instance;

class TencentMap{
    use Instance;
    protected $key;
    protected $secretKey;

    /**
     * @return mixed
     */
    public function getKey()
    {
        return $this->key;
    }

    /**
     * @param mixed $key
     */
    public function setKey($key): void
    {
        $this->key = $key;
    }

    public function getLocation($longitude,$latitude){
        $loc="$latitude,$longitude";
        $res=self::client()->get('https://apis.map.qq.com/ws/geocoder/v1/',[
            'query'=>$this->query([
                'location'=>$loc,
            ]),
        ]);
        $res=$this->result($res);
        return [
            'province'=>$res['ad_info']['province']??'',
            'city'=>$res['ad_info']['city']??'',
            'address'=>$res['address']??'',
        ];
    }

    public function getDistance($from,$to){
        $query=$this->query([
            'from'=>implode(',',array_reverse($from)),
            'to'=>implode(',',array_reverse($to)),
        ]);
        $res=self::client()->get('https://apis.map.qq.com/ws/direction/v1/driving',[
            'query'=>$query+['sig'=>$this->getSign('/ws/direction/v1/driving',$query)]
        ]);
        $res=$this->result($res);
        return [
            'distance'=>bcdiv($res['routes'][0]['distance'],1000),
        ];
    }

    protected function getSign($uri,$query){
        ksort($query);
        $str=sprintf("%s?%s",$uri,$this->buildQuery($query));
        return md5($str);
    }

    protected function buildQuery($query){
        $data=[];
        foreach ($query as $key=>$value){
            $data[]=sprintf("%s=%s",$key,$value);
        }
        return implode('&',$data).$this->secretKey;
    }

    /**
     * @param mixed $secretKey
     */
    public function setSecretKey($secretKey): void
    {
        $this->secretKey = $secretKey;
    }

    public static function client(){
        static $client;
        if(!$client){
            $client=new Client();
        }
        return $client;
    }

    private function query(array $query){
        return array_merge($query,[
            'key'=>$this->getKey(),
        ]);
    }
    private function result(ResponseInterface $response){
        $data=$response->getBody()->getContents();
        if(empty($data)){
            throw_user('调用tm返回值不存在');
        }
        $json=json_decode($data,true);
        if(!$json){
            throw_user('调用tm解析结果错误');
        }
        if($json['status']>0){
            throw_user("调用tm解析结果错误:{$json['message']}");
        }
        return $json['result'];
    }
}