<?php

/**
 * @author Any
 * @description KISS
 * @date 2021-4-17
 * @version 1.0.0
 *
 * _____LOG_____
 *
 */

namespace app\modules\api\components;


class GetDistance
{
    /**
     *计算两点地理坐标之间的距离
     * @param /Decimal $longitude1 起点经度
     * @param /Decimal $latitude1 起点纬度
     * @param /Decimal $longitude2 终点经度
     * @param /Decimal $latitude2 终点纬度
     * @param Int $unit 单位 1:米 2:公里
     * @param Int $decimal 精度 保留小数位数
     * @return /Decimal
     */
    public static function getDistance($longitude1, $latitude1, $longitude2, $latitude2, $unit = 2, $decimal = 2)
    {
        if (empty($longitude1) || empty($latitude1)) {
            return "未开启定位";
        }
        $EARTH_RADIUS = 6370.996; // 地球半径系数
        $PI = 3.1415926;
        $radLat1 = $latitude1 * $PI / 180.0;
        $radLat2 = $latitude2 * $PI / 180.0;

        $radLng1 = $longitude1 * $PI / 180.0;
        $radLng2 = $longitude2 * $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 = $distance / 1000;
        }
        return round($distance, $decimal) . 'km';
    }

    public static function mdate($time)
    {
        switch ($time) {
            case $time == 0:
                $text = '刚刚';
                break;
            //秒
            case $time < 60:
                $text = $time . '秒';
                break;
            //分钟
            case $time < 60 * 60:
                $text = floor($time / 60) . '分钟';
                break;
            //小时
            case $time < 60 * 60 * 24:
                $text = floor($time / (60 * 60)) . '小时';
                break;
            case $time > 60 * 60 * 24:
                $text = floor($time / (60 * 60)) . '小时';
                break;
        }
        return $text;
    }
}