<?php
namespace wxpay;

class Weixinmp
{
    public static $config = [];
    public function __construct()
    {
        $wechatConfig = config('wechat');
        $config['miniprogram']['appid'] = false;
        $config['miniprogram']['secret'] = false;
        $config['mp']['appid'] = false;
        $config['mp']['secret'] = false;
        $config['pay']['mch_id'] = false;
        $config['pay']['key'] = false;
        $config['pay']['notify_url'] = false;
        if (isset($wechatConfig)) {
            $config = array_merge($config, $wechatConfig);
        }
        self::$config = $config;
    }
    public function getOpenid()
    {
        if (!isset($_GET['code'])) {
            $baseUrl = urlencode('http://' . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI'] . $_SERVER['QUERY_STRING']);
            log2txt($baseUrl);
            $url = self::createOauthUrlForCode($baseUrl);
            Header("Location: {$url}");
            exit;
        } else {
            $code = $_GET['code'];
            $openid = self::getOpenidFromMp($code);
            return $openid;
        }
    }
    private function createOauthUrlForCode($redirectUrl)
    {
        $urlObj["appid"] = self::$config['mp']['appid'];
        $urlObj["redirect_uri"] = "{$redirectUrl}";
        $urlObj["response_type"] = "code";
        $urlObj["scope"] = "snsapi_userinfo";
        $urlObj["connect_redirect"] = "1";
        $urlObj["state"] = "STATE" . "#wechat_redirect";
        $bizString = self::toUrlParams($urlObj);
        return "https://open.weixin.qq.com/connect/oauth2/authorize?" . $bizString;
    }
    private function toUrlParams($urlObj)
    {
        $buff = "";
        foreach ($urlObj as $k => $v) {
            if ($k != "sign") {
                $buff .= $k . "=" . $v . "&";
            }
        }
        $buff = trim($buff, "&");
        return $buff;
    }
    function getOpenidFromMp($code)
    {
        $url = self::createOauthUrlForOpenid($code);
        $ch = curl_init();
        $curlVersion = curl_version();
        $ua = "WXPaySDK/3.0.9 (" . PHP_OS . ") PHP/" . PHP_VERSION . " CURL/" . $curlVersion['version'] . " " . self::$config['pay']['mch_id'];
        curl_setopt($ch, CURLOPT_TIMEOUT, 30);
        curl_setopt($ch, CURLOPT_URL, $url);
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
        curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);
        curl_setopt($ch, CURLOPT_USERAGENT, $ua);
        curl_setopt($ch, CURLOPT_HEADER, false);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        $proxyHost = "0.0.0.0";
        $proxyPort = 0;
        if ($proxyHost != "0.0.0.0" && $proxyPort != 0) {
            curl_setopt($ch, CURLOPT_PROXY, $proxyHost);
            curl_setopt($ch, CURLOPT_PROXYPORT, $proxyPort);
        }
        $res = curl_exec($ch);
        curl_close($ch);
        $data = json_decode($res, true);
        if (!isset($data['openid'])) {
            log2txt($data);
            exit($data['errmsg']);
        }
        // self::$data = $data;
        return $data;
    }
    function createOauthUrlForOpenid($code)
    {
        $urlObj["appid"] = self::$config['mp']['appid'];
        $urlObj["secret"] = self::$config['mp']['secret'];
        $urlObj["code"] = $code;
        $urlObj["grant_type"] = "authorization_code";
        $bizString = self::toUrlParams($urlObj);
        return "https://api.weixin.qq.com/sns/oauth2/access_token?" . $bizString;
    }
    function getUserinfo($openid, $access_token)
    {
        $userinfo_url = "https://api.weixin.qq.com/sns/userinfo?access_token={$access_token}&openid={$openid}&lang=zh_CN";
        $res = self::https_request($userinfo_url);
        $result = json_decode($res, true);
        log2txt('网页授权access_token 换取用户信息 ');
        log2txt($result);
        if (isset($result['errcode'])) {
            exit($result['errcode'] . ' ' . $result['errmsg']);
        }
        return $result;
    }
    function https_request($url, $data = null)
    {
        $curl = curl_init();
        curl_setopt($curl, CURLOPT_URL, $url);
        curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false);
        curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, false);
        if (!empty($data)) {
            curl_setopt($curl, CURLOPT_POST, 1);
            curl_setopt($curl, CURLOPT_POSTFIELDS, $data);
        }
        curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
        $output = curl_exec($curl);
        curl_close($curl);
        return $output;
    }
    function getPayinfo($totalFee, $outTradeNo, $orderName, $openid)
    {
        $notifyUrl = self::$config['pay']['notify_url'];
        $timestamp = time();
        $res = self::createJsBizPackage($totalFee, $outTradeNo, $orderName, $notifyUrl, $timestamp, $openid);
        $res['timeStamp'] = (string) $res['timeStamp'];
        return json_encode($res);
    }
    function createJsBizPackage($totalFee, $outTradeNo, $orderName, $notifyUrl, $timestamp, $openid)
    {
        $config = array('mch_id' => self::$config['pay']['mch_id'], 'appid' => self::$config['mp']['appid'], 'key' => self::$config['pay']['key']);
        $unified = array('appid' => $config['appid'], 'attach' => 'pay', 'body' => $orderName, 'mch_id' => $config['mch_id'], 'nonce_str' => self::getRandStr(16), 'notify_url' => $notifyUrl, 'out_trade_no' => $outTradeNo, 'spbill_create_ip' => '127.0.0.1', 'total_fee' => intval($totalFee * 100), 'trade_type' => 'JSAPI', 'openid' => $openid);
        $unified['sign'] = self::getSign($unified, $config['key']);
        $responseXml = self::https_request('https://api.mch.weixin.qq.com/pay/unifiedorder', self::arrayToXml($unified));
        $unifiedOrder = simplexml_load_string($responseXml, 'SimpleXMLElement', LIBXML_NOCDATA);
        if ($unifiedOrder === false) {
            die('parse xml error');
        }
        if ($unifiedOrder->return_code != 'SUCCESS') {
            die($unifiedOrder->return_msg);
        }
        if ($unifiedOrder->result_code != 'SUCCESS') {
            die($unifiedOrder->err_code_des);
        }
        $codeUrl = (array) $unifiedOrder->code_url;
        $arr = array("appId" => $config['appid'], "timeStamp" => $timestamp, "nonceStr" => self::getRandStr(16), "package" => "prepay_id=" . $unifiedOrder->prepay_id, "signType" => 'MD5');
        $arr['paySign'] = self::getSign($arr, $config['key']);
        return $arr;
    }
    function getRandStr($length)
    {
        $str = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789';
        $len = strlen($str) - 1;
        $randstr = '';
        for ($i = 0; $i < $length; $i++) {
            $num = mt_rand(0, $len);
            $randstr .= $str[$num];
        }
        return $randstr;
    }
    function getSign($params, $key)
    {
        ksort($params, SORT_STRING);
        $unSignParaString = self::formatQueryParaMap($params, false);
        $signStr = strtoupper(md5($unSignParaString . "&key=" . $key));
        return $signStr;
    }
    function formatQueryParaMap($paraMap, $urlEncode = false)
    {
        $buff = "";
        ksort($paraMap);
        foreach ($paraMap as $k => $v) {
            if (null != $v && "null" != $v) {
                if ($urlEncode) {
                    $v = urlencode($v);
                }
                $buff .= $k . "=" . $v . "&";
            }
        }
        $reqPar = '';
        if (strlen($buff) > 0) {
            $reqPar = substr($buff, 0, strlen($buff) - 1);
        }
        return $reqPar;
    }
    function arraytoxml($data)
    {
        $str = '<xml>';
        foreach ($data as $k => $v) {
            $str .= '<' . $k . '>' . $v . '</' . $k . '>';
        }
        $str .= '</xml>';
        return $str;
    }
}