<?php

namespace App\Services\Agent;

use Illuminate\Http\Request;

class AgentContextService
{
    public function device(Request $request): string
    {
        $ua = strtolower((string) $request->userAgent());
        return preg_match('/mobile|android|iphone|ipad|ipod|windows phone|harmonyos/', $ua)
            ? 'mobile'
            : 'pc';
    }

    public function domain(Request $request): string
    {
        foreach ([(string) $request->header('Origin'), (string) $request->header('Referer')] as $url) {
            $host = parse_url($url, PHP_URL_HOST);
            if (is_string($host) && $host !== '') {
                return strtolower($host);
            }
        }
        return strtolower((string) $request->getHost());
    }

    public function location(Request $request): array
    {
        // 优先读取 CDN/网关在边缘完成的 IP 归属地；没有时保留空值，避免登录依赖外部接口。
        return [
            'country' => mb_substr((string) ($request->header('CF-IPCountry') ?: $request->header('X-IP-Country', '')), 0, 128),
            'region' => mb_substr((string) $request->header('X-IP-Region', ''), 0, 128),
            'city' => mb_substr((string) $request->header('X-IP-City', ''), 0, 128),
        ];
    }
}