<?php


namespace App\Service\v3\Implementations;
use App\Service\v3\Interfaces\LocationServiceInterface;
use App\Model\v3\Area;
use App\Model\v3\Market;
class LocationService implements LocationServiceInterface
{

    public function do()
    {
        // TODO: Implement do() method.
    }

    public function check()
    {
        // TODO: Implement check() method.
    }

    public function undo()
    {
        // TODO: Implement undo() method.
    }

    public function getMarketListByLocation($cityIds)
    {
        $res = Area::query()->with('markets')->whereIn('id',$cityIds)->get();
        foreach ($res as &$v){
            foreach ($v->markets as &$m)
            {
                $m->Distance = $this->getDistance($m->lng,$m->lat,108.370333,22.813527);
            }
        }
        return $res;
    }

    public function searchMarket($keywords,$cityId = 2163)
    {
        $res = Market::query()->where([
                ['name','like','%'.$keywords.'%'],
                ['city_id','=',$cityId]
            ])
            ->get();
        foreach ($res as &$v){
            $v->Distance = $this->getDistance($v->lng,$v->lat,108.370333,22.813527);
        }
        return $res;
    }

    function getDistance($lng1, $lat1, $lng2, $lat2, $unit = 2, $decimal = 2)
    {

        $EARTH_RADIUS = 6370.996; // 地球半径系数
        $PI           = 3.1415926535898;

        $radLat1 = $lat1 * $PI / 180.0;
        $radLat2 = $lat2 * $PI / 180.0;

        $radLng1 = $lng1 * $PI / 180.0;
        $radLng2 = $lng2 * $PI / 180.0;

        $a = $radLat1 - $radLat2;
        $b = $radLng1 - $radLng2;

        $distance = 2 * asin(sqrt(pow(sin($a / 2), 2) + cos($radLat1) * cos($radLat2) * pow(sin($b / 2), 2)));
        $distance = $distance * $EARTH_RADIUS * 1000;

        if ($unit === 2) {
            $distance /= 1000;
        }

        return round($distance, $decimal);
    }
}