<?php

namespace App\Service\Weixin;

use App\Model\Settings;
use App\Service\Service;
use Illuminate\Support\Facades\Redis;

class WeixinService extends Service
{
    public function getToken(){
        $config = config('qingyaoWx');
        $token_key = $config['redis_key'];
        $token = Redis::get($token_key);
        if(empty($token)){
            $url = sprintf($config['get_token'], $config['appid'], $config['appsecret']);
            $res = $this->curlOpen($url);
            $res = json_decode($res,true);
            if(isset($res['errmsg'])) return [false, $res['errmsg']];
            if(! isset($res['access_token'])) return [false, 'request error'];
            $token = $res['access_token'];
            $expire_time = $res['expires_in']-300;
            Redis::set($token_key,$token);
            Redis::expire($token_key, $expire_time);

            return [true,$token];
        }

        return [true, $token];
    }

    public function getPublicWxArticle($data){
        list($status, $msg) = $this->rule($data);
        if(! $status) {
            file_put_contents('record_ip.txt',date("Y-m-d H:i:s",time()).json_encode($data) . PHP_EOL."来源IP".$msg.PHP_EOL,8);
            return [false, 'IP未入白名单'];
        }

        list($status, $msg) = $this->getToken();
        if(! $status) return [false, $msg];

        $config = config('qingyaoWx');
        $url = sprintf($config['get_article'], $msg);

        $offset = empty($data['page_index']) ? 1 : $data['page_index'] - 1;
        $count = empty($data['page_size']) || $data['page_size'] > 10 ? 10 : $data['page_size'];
        $post = [
            'offset' => $offset,
            'count' => $count,
            'no_content' => 0,
        ];
        $result = $this->curlOpen($url, ['post' => json_encode($post)]);
        $result = json_decode($result,true);

        if(isset($result['errmsg'])) return [false, $result['errmsg']];

        return [true, ['data' => $result['item'] ?? [], 'total' => $result['total_count'], 'data_count' => $result['item_count']]];
    }

    public function rule($data){
        // 获取用户的IP地址
        $userIP = $_SERVER['REMOTE_ADDR'];
        // 获取设置的IP地址
        $allowedIPs = $this->allowedIPs();

        if(empty($allowedIPs)) return [false, $userIP];
        // 校验用户IP是否在允许的范围内
        $isValidIP = false;
        foreach ($allowedIPs as $allowedIP) {
            if (strpos($allowedIP, '/') !== false) {
                // IP段表示法校验
                list($subnet, $mask) = explode('/', $allowedIP);
                if ((ip2long($userIP) & ~((1 << (32 - $mask)) - 1)) == ip2long($subnet)) {
                    $isValidIP = true;
                    break;
                }
            } else {
                // 单个IP地址校验
                if ($allowedIP === $userIP) {
                    $isValidIP = true;
                    break;
                }
            }
        }

        return [$isValidIP, $userIP];
    }

    public function allowedIPs(){
        $allowedIPs = Settings::where('setting_name','allowedIPs')->first();
        if(empty($allowedIPs) || empty($allowedIPs->setting_value)) return [];

        return explode(',',$allowedIPs->setting_value);
    }
}