<?php

namespace App\Libs;

use Exception;

class WxPayCommon
{
    public $app_id;
    public $key;
    public $merchant_id;
    public $ssl_cert_path;
    public $ssl_key_path;
    public $parameters = [];

    public function __construct()
    {
        $this->app_id = env("WEIXINPAY_APPID");
        $this->key = env("WEIXINPAY_KEY");
        $this->merchant_id = env("WEIXINPAY_MCHID");
        $this->ssl_cert_path = env("WEIXINPAY_SSLCERT_PATH");
        $this->ssl_key_path = env("WEIXINPAY_KEY_PATH");
    }

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

    /**
     * 作用：设置请求参数
     */
    function setParameter($parameter, $parameterValue)
    {
        $this->parameters[$this->trimString($parameter)] = $this->trimString($parameterValue);
    }

    /**
     * 生成接口参数xml
     */
    function createXml()
    {
        try {
            $this->parameters["appid"] = $this->app_id;//公众账号ID
            $this->parameters["mch_id"] = $this->merchant_id;//商户号
            $this->parameters["spbill_create_ip"] = $_SERVER['REMOTE_ADDR'];//终端ip
            $this->parameters["nonce_str"] = $this->createNoncestr();//随机字符串
            $this->parameters["sign"] = $this->getSign($this->parameters);//签名
            return $this->arrayToXml($this->parameters);
        } catch (Exception $e) {
            dd($e->getMessage());
        }
    }

    /**
     *    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：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：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：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);
            echo "curl出错，错误码:$error" . "<br>";
            echo "<a href='http://curl.haxx.se/libcurl/c/libcurl-errors.html'>错误原因查询</a></br>";
            curl_close($ch);
            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($ch, CURLOPT_SSLCERT, WxPayConfPub::SSLCERT_PATH);
        //默认格式为PEM，可以注释
        curl_setopt($ch, CURLOPT_SSLKEYTYPE, 'PEM');
        curl_setopt($ch, CURLOPT_SSLKEY, WxPayConfPub::SSLKEY_PATH);
        //post提交方式
        curl_setopt($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);
            echo "curl出错，错误码:$error" . "<br>";
            echo "<a href='http://curl.haxx.se/libcurl/c/libcurl-errors.html'>错误原因查询</a></br>";
            curl_close($ch);
            return false;
        }
    }

    /**
     *
     * 查询订单，WxPayOrderQuery中out_trade_no、transaction_id至少填一个
     * appid、mchid、spbill_create_ip、nonce_str不需要填入
     * @param WxPayConfigInterface $config 配置对象
     * @param WxPayOrderQuery $inputObj
     * @param int $timeOut
     * @return 成功时返回，其他抛异常
     * @throws WxPayException
     */
    protected function orderQuery($inputObj, $timeOut = 6)
    {
        $url = "https://api.mch.weixin.qq.com/pay/orderquery";
        //检测必填参数
        if (!$inputObj->IsOut_trade_noSet() && !$inputObj->IsTransaction_idSet()) {
            throw new WxPayException("订单查询接口中，out_trade_no、transaction_id至少填一个！");
        }
        $inputObj->SetAppid($config->GetAppId());//公众账号ID
        $inputObj->SetMch_id($config->GetMerchantId());//商户号
        $inputObj->SetNonce_str(self::getNonceStr());//随机字符串

        $inputObj->SetSign($config);//签名
        $xml = $inputObj->ToXml();

        $startTimeStamp = self::getMillisecond();//请求开始时间
        $response = self::postXmlCurl($config, $xml, $url, false, $timeOut);
        $result = WxPayResults::Init($config, $response);
        self::reportCostTime($config, $url, $startTimeStamp, $result);//上报请求花费时间

        return $result;
    }
}