<?php
/**
 * 微信支付类
 */

namespace Util\Wx;

class Wxpaysdk
{
    const UFORDER_URL = 'https://api.mch.weixin.qq.com/pay/unifiedorder'; //获取预支付URL,prepayid.
    private $mch_id; //微信支付商户号
    private $sub_mch_id; //微信支付子商户号
    private $sub_openid; //微信支付子商户号
    private $sub_appid; //微信支付子商户号
    private $key; //微信支付商户KEY
    private $openid; //微信支付用户号
    private $appid;
    private $appsecret;
    private $out_trade_no;
    private $total_fee; //总金额
    private $notify_url; //ND地址
    private $trade_type; //JSAPI
    private $curl_timeout;
    //动态参数
    private $parameters;
    //非必填参数，商户可根据实际情况选填
    //$unifiedOrder->setParameter("sub_mch_id","XXXX");//子商户号
    //$unifiedOrder->setParameter("device_info","XXXX");//设备号
    //$unifiedOrder->setParameter("attach","XXXX");//附加数据
    //$unifiedOrder->setParameter("time_start","XXXX");//交易起始时间
    //$unifiedOrder->setParameter("time_expire","XXXX");//交易结束时间
    //$unifiedOrder->setParameter("goods_tag","XXXX");//商品标记
    //$unifiedOrder->setParameter("openid","XXXX");//用户标识
    //$unifiedOrder->setParameter("product_id","XXXX");//商品ID
    //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

    //
    private $prepay_id; //获取prepay_id

    public function __construct($options) {
        $this->mch_id = isset($options['mch_id']) ? $options['mch_id'] : '';
        $this->appid = isset($options['appid']) ? $options['appid'] : '';
        $this->out_trade_no = isset($options['out_trade_no']) ? $options['out_trade_no'] : '';
        $this->total_fee = isset($options['total_fee']) ? $options['total_fee']*100 : '';
        $this->notify_url = isset($options['notify_url']) ? $options['notify_url'] : '';
        $this->trade_type = isset($options['trade_type']) ? $options['trade_type'] : 'JSAPI';
        $this->curl_timeout = isset($options['curl_timeout']) ? $options['curl_timeout'] : '30';
        $this->body = isset($options['body']) ? $options['body']:'';
        $this->key = isset($options['key'])?$options['key']:'';
        $this->openid = isset($options['openid'])?$options['openid']:'';
        if(!empty($options['sub_mch_id'])){
            $this->sub_mch_id = isset($options['sub_mch_id'])?$options['sub_mch_id']:'';
        }
        if(!empty($options['sub_appid'])){
            $this->sub_appid = isset($options['sub_appid'])?$options['sub_appid']:'';
        }
        if(!empty($options['sub_openid'])){
            $this->sub_openid = isset($options['sub_openid'])?$options['sub_openid']:'';
        }
    }

    /**
     * 获取prepay_id
     */
    function getPrepayId() {
        $url = 'https://api.mch.weixin.qq.com/pay/unifiedorder';
        $this->postXml($url); //追入获取链接
        /*print_r($this->response);
        exit;*/
        $this->result = $this->xmlToArray($this->response);
        $this->prepay_id = $this->result["prepay_id"];
        if(isset($this->result['result_code'])&&$this->result['result_code']=='SUCCESS' && isset($this->result['return_code'])&&$this->result['return_code']=='SUCCESS'){
//            print_r($this->result);
            $url = $this->getJSAPI();
            return $url;
        }else{
            return $this->result;
        }
    }

    /**
     * 	作用：设置JSAPI_prepay_id
     */

    function setPrepayId($prepayId) {
        $this->prepay_id = $prepayId;
    }

    /**
     * 	作用：设置jsapi的参数
     */
    public function getJSAPI() {
        if(!empty($this->sub_appid)){
            $wOpt['appId'] = $this->sub_appid;
        }else{
            $wOpt['appId'] = $this->appid;
        }

        $timeStamp = time();
        $wOpt['timeStamp'] = $timeStamp;
        $wOpt['nonceStr'] = $this->createNoncestr(8);
        $wOpt['package'] = 'prepay_id=' . $this->prepay_id;
        $wOpt['signType'] = 'MD5';
        ksort($wOpt, SORT_STRING);
        foreach ($wOpt as $key => $v) {
            $string .= "{$key}={$v}&";
        }
        /*echo $string;
        exit;*/
        $string .= "key=" . $this->key;
//		echo $string . "<br><br>";
        $wOpt['paySign'] = strtoupper(md5($string));
//		echo $wOpt['paySign'];
        $string .='&paySign='.$wOpt['paySign'];
        $wOpt['url'] = "http://" . $_SERVER['HTTP_HOST'] . __ROOT__ . "/wxpay.php?$string".'&notify_url='.$this->notify_url;
//        echo $url;exit;
        return $wOpt;
    }
    /**
     * 	作用：设置请求参数
     */
    function setParameter($parameter, $parameterValue) {
        $this->parameters[$this->trimString($parameter)] = $this->trimString($parameterValue);
    }

    /**
     * 	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['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["nonce_str"] = $this->createNoncestr(); //随机字符串
        $this->parameters["spbill_create_ip"] = $_SERVER['REMOTE_ADDR']; //终端ip
        $this->parameters['body'] = $this->body;
        $this->parameters['trade_type'] = $this->trade_type;
        $this->parameters['notify_url'] = $this->notify_url;
        if(!empty($this->openid)){
            $this->parameters['openid'] = $this->openid;
        }
        if(!empty($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->sub_openid)){
            $this->parameters['sub_openid'] = $this->sub_openid;
        }
        $this->parameters["sign"] = $this->getSign($this->parameters); //签名

        return $this->arrayToXml($this->parameters);
    }
    /**
     * 	作用：post请求xml
     */
    function postXml($url) {
        $xml = $this->createXml();
        //dump($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($arr) {
//        print_r($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, CURLOP_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);
        curl_close($ch);
        //返回结果
        if ($data) {
            curl_close($ch);
            return $data;
        } else {
            $error = curl_errno($ch);
            curl_close($ch);
            return false;
        }
    }

    /**
     * POST 请求
     * @param string $url
     * @param array $param
     * @param boolean $post_file 是否文件上传
     * @return string content
     */
    private function http_post($url, $xml, $post_file = false) {
        $oCurl = curl_init();
        if (stripos($url, "https://") !== FALSE) {
            curl_setopt($oCurl, CURLOPT_SSL_VERIFYPEER, FALSE);
            curl_setopt($oCurl, CURLOPT_SSL_VERIFYHOST, false);
            curl_setopt($oCurl, CURLOPT_SSLVERSION, 1); //CURL_SSLVERSION_TLSv1
        }
        if (is_string($param) || $post_file) {
            $strPOST = $param;
        } else {
            $aPOST = array();
            foreach ($param as $key => $val) {
                $aPOST[] = $key . "=" . urlencode($val);
            }
            $strPOST = join("&", $aPOST);
        }
        curl_setopt($oCurl, CURLOPT_URL, $url);
        curl_setopt($oCurl, CURLOPT_RETURNTRANSFER, 1);
        curl_setopt($oCurl, CURLOPT_POST, true);
        curl_setopt($oCurl, CURLOPT_POSTFIELDS, $strPOST);
        $sContent = curl_exec($oCurl);
        $aStatus = curl_getinfo($oCurl);
        curl_close($oCurl);
        if (intval($aStatus["http_code"]) == 200) {
            return $sContent;
        } else {
            return false;
        }
    }

    /**
     * 	作用：使用证书，以post方式提交xml到对应的接口url
     */
    function postXmlSSLCurl($xml, $url, $second = 30) {
        $ch = curl_init();
        //超时时间
        curl_setopt($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($ch, CURLOPT_RETURNTRANSFER, TRUE);
        //设置证书
        //使用证书：cert 与 key 分别属于两个.pem文件
        //默认格式为PEM，可以注释
        curl_setopt($ch, CURLOPT_SSLCERTTYPE, 'PEM');
        curl_setopt($ch, CURLOPT_SSLCERT, WxPayConf_pub::SSLCERT_PATH);
        //默认格式为PEM，可以注释
        curl_setopt($ch, CURLOPT_SSLKEYTYPE, 'PEM');
        curl_setopt($ch, CURLOPT_SSLKEY, WxPayConf_pub::SSLKEY_PATH);
        //post提交方式
        curl_setopt($ch, CURLOPT_POST, true);
        curl_setopt($ch, CURLOPT_POSTFIELDS, $xml);
        $data = curl_exec($ch);
        //返回结果
        if ($data) {
            curl_close($ch);
            return $data;
        } else {
            $error = curl_errno($ch);
            curl_close($ch);
            return false;
        }
    }

}