<?php
defined('BASEPATH') OR exit('No direct script access allowed');

if(! function_exists('get_distance'))
{
    function get_distance($lat1, $lng1, $lat2, $lng2)
    {
        $earth_radius = 6371.393;//地球平均半径
        $pi = 3.1415926535898;

        $radLat1 = $lat1 * $pi / 180.0;
        $radLat2 = $lat2 * $pi / 180.0;
        $a = $radLat1 - $radLat2;
        $b = ($lng1 * $pi / 180.0) - ($lng2 * $pi / 180.0);
        $s = 2 * asin(sqrt(pow(sin($a/2),2) + cos($radLat1) * cos($radLat2) * pow(sin($b/2),2)));
        $s = $s * $earth_radius;
        $s = round($s * 1000);

        return $s;
    }
}

if(! function_exists('get_geo_dist'))
{
    function get_geo_dist($geodist)
    {
        $geodist = intval($geodist ? $geodist : 0);
        return $geodist > 1000 ? sprintf("%.1f",($geodist/1000)).'km' : $geodist.'m';
    }
}


/**
 * @param string $idx
 * @param string $keyword
 * @param int $page
 * @param array $filter {"k":[]} or {"k":{"v":[], "exc":"bool 1不包含,0包含"}}
 * @param array $order
 * @param array $geo
 * @param int $page_size
 * @param array $range
 * @return mixed
 */

if(! function_exists('search_by_sphinx'))
{
    function search_by_sphinx($idx, $keyword = '', $page = 1, $filter = array(), $order = array(), $geo = array(), $page_size = 10, $range = array() ,$groupby=array())
    {
        $CI = & get_instance();
        $CI->config->load('sphinx', true, true);
        $config = $CI->config->item('sphinx');

        require_once COMMPATH.'third_party/Sphinxclient.php';

        $sphinxclient = new Sphinxclient();
        $sphinxclient->SetServer($config['host'], $config['port']);

        if($filter)
        {
            foreach($filter as $k => $v)
            {
                if($v['v']){
                    $sphinxclient->SetFilter($k, $v['v'], boolval($v['exc']));
                } else {
                    $sphinxclient->SetFilter($k, $v);
                }
            }
        }

        if($range)
        {
            foreach($range as $k => $v)
            {
                $sphinxclient->SetFilterRange($k, $v[0], $v[1]);
            }
        }

        if($geo)
        {
            $sphinxclient->SetGeoAnchor('lat', 'lng', (float) deg2rad($geo['lat']), (float) deg2rad($geo['lng'])); //角度转换成弧度
        }

        if($groupby){
            $sphinxclient->SetGroupBy ( $groupby[0], SPH_GROUPBY_ATTR,$groupby[1]);
        }

        if($order)
        {
            $sphinxclient->SetSortMode($order[0], $order[1]);
        }

        $sphinxclient->setLimits(intval(($page - 1) * $page_size), intval($page_size), $config['SPHINX_MAX_MATCHES']);


        if($result = $sphinxclient->query($keyword, $idx))
        {
            return $result;
        }

        debug_log($sphinxclient->GetLastError(), 'sphinx.log');
        return false;
    }
}