<?php
/**
 * 微信支付类
 */

namespace Util\Wx;

class WxMicroPay
{
    const UFORDER_URL = 'https://api.mch.weixin.qq.com/pay/micropay'; //获取预支付URL,prepayid.
    private $appid;
    private $mch_id; //微信支付商户号
    private $body;//商品简单描述
    private $out_trade_no;//商户自定义流水号
    private $total_fee; //总金额
    private $auth_code;
    private $key; //微信支付商户KEY
    private $curl_timeout;
    private $sub_mch_id;
    private $sub_appid;

    //动态参数
    private $parameters;
    //非必填参数，商户可根据实际情况选填
    //微信CURL响应
    public $response; //微信返回的响应
    public $result; //返回参数，类型为关联数组
    public $apiclient_cert;
    public $apiclient_key;
    public $face_code;   //微信刷脸支付参数
    public $openid; //微信刷脸用户openid
    public $version; //版本号
    public $goods_tag; //优惠标记
    public $detail; //商品详情

    public function __construct($options) {
        $this->appid = isset($options['appid']) ? $options['appid'] : '';
        $this->mch_id = isset($options['mch_id']) ? $options['mch_id'] : '';
        $this->body = isset($options['body']) ? $options['body']:'';
        $this->out_trade_no = isset($options['out_trade_no']) ? $options['out_trade_no'] : '';
        $this->total_fee = isset($options['total_fee']) ? $options['total_fee']*100 : '';
        $this->auth_code = isset($options['auth_code']) ? $options['auth_code'] : '';
        $this->face_code = isset($options['face_code']) ? $options['face_code'] : '';
        $this->key = isset($options['key'])?$options['key']:'';
        $this->openid = isset($options['openid'])?$options['openid']:'';
        $this->curl_timeout = isset($options['curl_timeout']) ? $options['curl_timeout'] : '30';
        $this->apiclient_cert = isset($options['apiclient_cert']) ? $options['apiclient_cert']:'';
        $this->apiclient_key = isset($options['apiclient_key']) ? $options['apiclient_key']:'';
        $this->sub_mch_id = isset($options['sub_mch_id']) ? $options['sub_mch_id']:'';
        $this->sub_appid = isset($options['sub_appid']) ? $options['sub_appid']:'';
        $this->version = isset($options['version']) ? $options['version']:'';
        $this->goods_tag = isset($options['goods_tag']) ? $options['goods_tag']:'';
        $this->detail = isset($options['detail']) ? $options['detail']:'';
    }

    function postWxMicro() {
        if(!empty($this->face_code)){
            $url = "https://api.mch.weixin.qq.com/pay/facepay";
        }else{
            $url = 'https://api.mch.weixin.qq.com/pay/micropay';
        }
        $this->postXml($url); //追入获取链接
        $this->result = $this->xmlToArray($this->response);
//        print_r($this->result);
        return $this->result;
    }
    /**
     * 	作用：设置标配的请求参数，生成签名，生成接口参数xml
     */
    function createXml() {
        $this->parameters["appid"] = $this->appid; //公众账号ID
        $this->parameters["mch_id"] = $this->mch_id; //商户号
        $this->parameters["nonce_str"] = $this->createNoncestr(); //随机字符串
        $this->parameters['body'] = $this->body;
        $this->parameters['out_trade_no'] = $this->out_trade_no;//商户订单号
        $this->parameters['total_fee'] = $this->total_fee;//支付金额
        $this->parameters["spbill_create_ip"] = $_SERVER['REMOTE_ADDR']; //终端ip

        if(!empty($this->auth_code)){
            $this->parameters['auth_code'] = $this->auth_code;//支付金额
        }
        if(!empty($this->sub_mch_id)){
            $this->parameters["sub_mch_id"] = $this->sub_mch_id;
        }
        if(!empty($this->sub_appid)){
            $this->parameters["sub_appid"] = $this->sub_appid;
        }
        if(!empty($this->face_code)){
            $this->parameters["openid"] = $this->openid;
            $this->parameters["face_code"] = $this->face_code;
        }
        if(!empty($this->version) && !empty($this->goods_tag) && !empty($this->detail)){
            $this->parameters['version'] = $this->version;
            $this->parameters['goods_tag'] = $this->goods_tag;
            $this->parameters['detail'] = $this->detail;
        }
        $this->parameters["sign"] = $this->getSign($this->parameters); //签名
        return $this->arrayToXml($this->parameters);
    }
    /**
     * 	作用：post请求xml
     */
    function postXml($url) {
        $xml = $this->createXml();
//        print_r($xml);
        $this->response = $this->postXmlCurl($xml, $url, $this->curl_timeout);
        //dump($this->response);
        return $this->response;
    }

    //常用工具
    function trimString($value) {
        $ret = null;
        if (null != $value) {
            $ret = $value;
            if (strlen($ret) == 0) {
                $ret = null;
            }
        }
        return $ret;
    }

    /**
     * 	作用：产生随机字符串，不长于32位
     */
    public function createNoncestr($length = 32) {
        $chars = "abcdefghijklmnopqrstuvwxyz0123456789";
        $str = "";
        for ($i = 0; $i < $length; $i++) {
            $str .= substr($chars, mt_rand(0, strlen($chars) - 1), 1);
        }
        return $str;
    }

    /**
     * 	作用：格式化参数，签名过程需要使用
     */
    function formatBizQueryParaMap($paraMap, $urlencode) {
        $buff = "";
        ksort($paraMap);
        foreach ($paraMap as $k => $v) {
            if ($urlencode) {
                $v = urlencode($v);
            }
            //$buff .= strtolower($k) . "=" . $v . "&";
            $buff .= $k . "=" . $v . "&";
        }
        $reqPar;
        if (strlen($buff) > 0) {
            $reqPar = substr($buff, 0, strlen($buff) - 1);
        }
        return $reqPar;
    }

    /**
     * 	作用：生成签名
     */
    public function getSign($Obj) {
        foreach ($Obj as $k => $v) {
            $Parameters[$k] = $v;
        }
        //签名步骤一：按字典序排序参数
        ksort($Parameters);
        $String = $this->formatBizQueryParaMap($Parameters, false);
        //echo '【string1】'.$String.'</br>';
        //签名步骤二：在string后加入KEY
        $String = $String . "&key=" . $this->key;
        //echo "【string2】".$String."</br>";
        //签名步骤三：MD5加密
        $String = md5($String);
        //echo "【string3】 ".$String."</br>";
        //签名步骤四：所有字符转为大写
        $result_ = strtoupper($String);
        //echo "【result】 ".$result_."</br>";
        return $result_;
    }

    /**
     * 	作用：array转xml
     */
    function arrayToXml($arr) {
        $xml = "<xml>";
        foreach ($arr as $key => $val) {
            if (is_numeric($val)) {
                $xml .= "<" . $key . ">" . $val . "</" . $key . ">";
            } else {
                $xml .= "<" . $key . "><![CDATA[" . $val . "]]></" . $key . ">";
            }
        }
        $xml .= "</xml>";
        return $xml;
    }

    /**
     * 	作用：将xml转为array
     */
    public function xmlToArray($xml) {
        //将XML转为array
        $array_data = json_decode(json_encode(simplexml_load_string($xml, 'SimpleXMLElement', LIBXML_NOCDATA)), true);
        return $array_data;
    }

    /**
     * 	作用：以post方式提交xml到对应的接口url
     */
    public function postXmlCurl($xml, $url, $second = 30) {
        //初始化curl
        $ch = curl_init();
        //设置超时
        curl_setopt($ch, CURLOPT_TIMEOUT, $second);
        //这里设置代理，如果有的话
        //curl_setopt($ch,CURLOPT_PROXY, '8.8.8.8');
        //curl_setopt($ch,CURLOPT_PROXYPORT, 8080);
        curl_setopt($ch, CURLOPT_URL, $url);
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
        curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, FALSE);
        //设置header
        curl_setopt($ch, CURLOPT_HEADER, FALSE);
        //要求结果为字符串且输出到屏幕上
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
        //post提交方式
        curl_setopt($ch, CURLOPT_POST, TRUE);
        curl_setopt($ch, CURLOPT_POSTFIELDS, $xml);
        //运行curl
        $data = curl_exec($ch);
        //返回结果
        if ($data) {
            curl_close($ch);
            return $data;
        } else {
            $error = curl_errno($ch);
            curl_close($ch);
            return false;
        }
    }
    /**
     * 	作用：以post方式提交xml到对应的接口url，只适用于撤销订单和退款
     */
    public function postXmlCurlCancel($xml, $url, $second = 30) {
        //初始化curl
        $ch = curl_init();
        //设置超时
        curl_setopt($ch, CURLOPT_TIMEOUT, $second);
        //这里设置代理，如果有的话
        //curl_setopt($ch,CURLOPT_PROXY, '8.8.8.8');
        //curl_setopt($ch,CURLOPT_PROXYPORT, 8080);
        curl_setopt($ch, CURLOPT_URL, $url);
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
        curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, FALSE);
        //设置证书
        curl_setopt($ch,CURLOPT_SSLCERTTYPE,'PEM');
        curl_setopt($ch,CURLOPT_SSLCERT, $this->apiclient_cert);
        curl_setopt($ch,CURLOPT_SSLKEYTYPE,'PEM');
        curl_setopt($ch,CURLOPT_SSLKEY, $this->apiclient_key);
        //设置header
        curl_setopt($ch, CURLOPT_HEADER, FALSE);
        //要求结果为字符串且输出到屏幕上
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
        //post提交方式
        curl_setopt($ch, CURLOPT_POST, TRUE);
        curl_setopt($ch, CURLOPT_POSTFIELDS, $xml);
        //运行curl
        $data = curl_exec($ch);
        //返回结果
        if ($data) {
            curl_close($ch);
            return $data;
        } else {
            $error = curl_errno($ch);

            curl_close($ch);
            return false;
        }
    }
}