<?php

namespace App\Extend;

use Hyperf\Context\Context;
use Psr\Http\Message\ServerRequestInterface;
use function Hyperf\Support\env;

class SystemUtil
{
    /**
     * prod 1=生产环境 0=开发环境
     * @return bool
     */
    static function checkProEnv()
    {
        return Env('APP_ENV') == 'prod';
    }

    /**
     * 获取客户端 ip
     * @return mixed|string
     */
    static function getClientIp()
    {
        $request = Context::get(ServerRequestInterface::class);

        $ip_addr = $request->getHeaderLine('x-forwarded-for');
        if (self::verifyIp($ip_addr)) {
            return $ip_addr;
        }

        $ip_addr = $request->getHeaderLine('remote-host');
        if (self::verifyIp($ip_addr)) {
            return $ip_addr;
        }

        $ip_addr = $request->getHeaderLine('x-real-ip');
        if (self::verifyIp($ip_addr)) {
            return $ip_addr;
        }

        $ip_addr = $request->getServerParams()['remote_addr'] ?? '0.0.0.0';
        if (self::verifyIp($ip_addr)) {
            return $ip_addr;
        }

        return '0.0.0.0';
    }

    /**
     * 验证ip
     * @param $realIp
     * @return mixed
     */
    static function verifyIp($realIp): mixed
    {
        return filter_var($realIp, FILTER_VALIDATE_IP, FILTER_FLAG_IPV4);
    }

    /**
     * 计算距离
     * @param array $locationOneArr
     * @param array $locationTwoArr
     * @param int $unit
     * @return float|int
     */
    static function calculateDistance(array $locationOneArr, array $locationTwoArr, int $unit = 1): float|int
    {
        // 地球平均半径，单位：公里
        $earthRadius = 6371;

        // 提取经纬度
        $lat1 = deg2rad($locationOneArr['lat']);
        $lon1 = deg2rad($locationOneArr['lon']);
        $lat2 = deg2rad($locationTwoArr['lat']);
        $lon2 = deg2rad($locationTwoArr['lon']);

        // 计算距离
        $dLat = $lat2 - $lat1;
        $dLon = $lon2 - $lon1;

        $a = sin($dLat / 2) * sin($dLat / 2) + cos($lat1) * cos($lat2) * sin($dLon / 2) * sin($dLon / 2);
        $c = 2 * atan2(sqrt($a), sqrt(1 - $a));

        // 根据单位转换距离
        $distance = $earthRadius * $c;
        return match ($unit) {
            1 => $distance,                 //公里
            2 => $distance * 1000,       //英尺
            3 => $distance * 3280.84,          //米
            default => 0,
        };
    }
}