<?php
/**
 * Created by Vim
 * User: lcc
 * Date: 2021-08-11
 * Time: 18:54
 * Desc: 微信支付V3
 */
use GuzzleHttp\Exception\RequestException;
use WechatPay\GuzzleMiddleware\WechatPayMiddleware;
use WechatPay\GuzzleMiddleware\Util\PemUtil;
class WechatPayV3{
    private $merchantId;
    private $merchantSerialNumber;
    private $merchantPrivateKey;

    public function __construct($config){
        $this->merchantId = $config['merchantId']; //商户号
        $this->merchantSerialNumber = $config['merchantSerialNumber']; //商户API证书序列号
        $this->merchantPrivateKey = $config['merchantPrivateKey']; //商户证书路径
        $this->wechatpayCertificate = $config['wechatpayCertificate']; //微信支付平台证书
    }

    public function unifiedOrder($json,$appid,$noncestr){
        $url = 'https://api.mch.weixin.qq.com/v3/pay/partner/transactions/jsapi';
        // 商户相关配置
        //$merchantId = '1612096731'; // 商户号
        //$merchantSerialNumber = '761590F1FF6DFC2466894F96E2DE1169CE644A74'; // 商户API证书序列号
        $merchantPrivateKey = PemUtil::loadPrivateKey($this->merchantPrivateKey); // 商户私钥
        // 微信支付平台配置
        $wechatpayCertificate = PemUtil::loadCertificate($this->wechatpayCertificate); // 微信支付平台证书
        
        // 构造一个WechatPayMiddleware
        $wechatpayMiddleware = WechatPayMiddleware::builder()
            ->withMerchant($this->merchantId, $this->merchantSerialNumber, $merchantPrivateKey) // 传入商户相关配置
            ->withWechatPay([ $wechatpayCertificate ]) // 可传入多个微信支付平台证书，参数类型为array
            ->build();
        
        // 将WechatPayMiddleware添加到Guzzle的HandlerStack中
        $stack = GuzzleHttp\HandlerStack::create();
        $stack->push($wechatpayMiddleware, 'wechatpay');
        
        // 创建Guzzle HTTP Client时，将HandlerStack传入
        $client = new GuzzleHttp\Client(['handler' => $stack]);
        
        // 接下来，正常使用Guzzle发起API请求，WechatPayMiddleware会自动地处理签名和验签
        try {
            $resp = $client->request('POST', $url, [
                'json' => $json,
                'headers' => [ 'Accept' => 'application/json' ]
            ]);

            $body = json_decode($resp->getBody(),true);
            if(!$body['prepay_id']){
                return ['code'=>0,'msg'=>'下单失败'];
            }
            //微信支付（小程序）签名
            $timeStamp = time();
            $str = $this->getWechartSign($appid,$timeStamp,$noncestr,'prepay_id='.$body['prepay_id']);
            $data = array('appid'=>$appid,'timeStamp'=>"$timeStamp",'package'=>'prepay_id='.$body['prepay_id'],'paySign'=>$str,'nonceStr'=>$noncestr,'signType'=>'RSA');

            return ['code'=>1,'data'=>$data];
        } catch (RequestException $e) {
            // 进行错误处理
            //echo $e->getMessage()."\n";
            $error_msg = $e->getMessage();
            if ($e->hasResponse()) {
                //echo $e->getResponse()->getStatusCode().' '.$e->getResponse()->getReasonPhrase()."\n";
                //echo $e->getResponse()->getBody();
            }
            return ['code'=>0,'msg'=>$error_msg];
        }
    }
    //解冻剩余资金API
    public function unfreeze($json,$noncestr){
        $url = 'https://api.mch.weixin.qq.com/v3/profitsharing/orders/unfreeze';
        // 商户相关配置
        $merchantPrivateKey = PemUtil::loadPrivateKey($this->merchantPrivateKey); // 商户私钥
        $wechatpayCertificate = PemUtil::loadCertificate($this->wechatpayCertificate); // 微信支付平台证书
        
        $wechatpayMiddleware = WechatPayMiddleware::builder()
            ->withMerchant($this->merchantId, $this->merchantSerialNumber, $merchantPrivateKey) // 传入商户相关配置
            ->withWechatPay([ $wechatpayCertificate ]) // 可传入多个微信支付平台证书，参数类型为array
            ->build();
        
        $stack = GuzzleHttp\HandlerStack::create();
        $stack->push($wechatpayMiddleware, 'wechatpay');
        
        // 创建Guzzle HTTP Client时，将HandlerStack传入
        $client = new GuzzleHttp\Client(['handler' => $stack]);
        
        // 接下来，正常使用Guzzle发起API请求，WechatPayMiddleware会自动地处理签名和验签
        try {
            $resp = $client->request('POST', $url, [
                'json' => $json,
                'headers' => [ 'Accept' => 'application/json' ]
            ]);

            $body = json_decode($resp->getBody(),true);
            return ['code'=>1,'data'=>$body];
        } catch (RequestException $e) {
            // 进行错误处理
            //echo $e->getMessage()."\n";
            $error_msg = $e->getMessage();
            if ($e->hasResponse()) {
                //echo $e->getResponse()->getStatusCode().' '.$e->getResponse()->getReasonPhrase()."\n";
                //echo $e->getResponse()->getBody();
            }
            return ['code'=>0,'msg'=>$error_msg];
        }
    }
    //调起支付的签名
    private function getWechartSign($appid,$timeStamp,$noncestr,$prepay_id){
        $str = $appid."\n".$timeStamp."\n".$noncestr."\n".$prepay_id."\n";
        $key = file_get_contents($this->merchantPrivateKey);
        $str = $this->getSha256WithRSA($str,$key);
        return $str;
    }

    private function getSha256WithRSA($content, $privateKey){
        $binary_signature = "";
        $algo = "SHA256";
        openssl_sign($content, $binary_signature, $privateKey, $algo);
        $sign = base64_encode($binary_signature);
        return $sign;
    }

}