/**
 * 預支付請求接口(POST)
 * @param string $openid openid
 * @param string $body 商品簡單描述
 * @param string $order_sn 訂單編號
 * @param string $total_fee 金額
 * @return json的數據
 */
 public function prepay()
 {
 tp_log('預支付請求數據===>' . json_encode($_POST), 'prepay', request()->controller());
 $goods_user = db('tf_goods_user')->where(array('order_no' => $_POST['order_no']))->find();
 $goods = db('tf_goods')->where(array('id' => $goods_user['goods_id']))->find();
 //判斷產品的數量
 if (($goods['sales_initial'] - $goods['sales_actual']) = 0) {
 $return['status'] = 0;
 $return['info'] = '此產品已售完';
 exit(json_encode($return));
 }

 $order_no = $_POST['order_no']; //訂單號
 $is_sale = $_POST['is_sale'];
 $openid = $_POST['openid'];
 $goods_name = $_POST['goods_name'];
 $pay_price = $_POST['price'];
 $attach['is_sale'] = $_POST['is_sale'];
 $attach['sale_id'] = $_POST['sale_id'];
 $nonce_str = $this->nonce_str();//隨機字符串


 $order_no_ssh = $this->get_orderssh(); //商戶訂單號
 //組裝支付數據
 $data = [
 'appid' => config('pay.APPID'),
 'mch_id' => config('pay.MCHID'),
 'nonce_str' => $nonce_str,
 'body' => $goods_name, //商品名稱組合
 'attach' => json_encode($attach),
 'out_trade_no' => $order_no_ssh,//$order_no, //訂單號 商戶訂單號
 'total_fee' => intval($pay_price * 100),
 'spbill_create_ip' => $_SERVER['REMOTE_ADDR'],
 'notify_url' => config('pay.NOTIFY_URL'),
 'trade_type' => 'JSAPI',
 'openid' => $openid
 ];

 //訂單支付表創建訂單支付數據
 $p_o_data['createtime'] = time();
 $p_o_data['order_no'] = $order_no;
 $p_o_data['order_no_ssh'] = $order_no_ssh;
 $p_o_data['ready'] = json_encode($data);
 $p_o_return = db('tf_pay_order')->insert($p_o_data);
 if(!$p_o_return){
 //失敗
 $return['status'] = -1;
 $return['info'] = $p_o_data;
 exit(json_encode($return));
 }

 // 獲取簽名
 $sign = $this->makeSign($data);
 $data['sign'] = $sign;
 $xml = $this->toXml($data);
 $url = 'https://api.mch.weixin.qq.com/pay/unifiedorder'; //發起支付接口鏈接
 //發起預支付請求
 $prepay_return_reslut_xml = $this->http_request($url, $xml);
 $xml_to_arr = $this->fromXml($prepay_return_reslut_xml);
 $return_result = json_encode($xml_to_arr, true);
 tp_log('預支付請求返回數據array===>' .$return_result , 'prepay', request()->controller());
 //記錄預支付返回信息
 db('tf_goods_order')->where(array('order_no' => $order_no))
 ->update(array(
 'go_pay' => $return_result,
 'updatetime' => time(),
 'updateuser' => $openid
 ));
 if($xml_to_arr['return_code'] == 'SUCCESS'  $xml_to_arr['result_code'] == 'SUCCESS'){
 //成功

 $time = time();
 //臨時數組用于簽名
 $tmp = [
 'appId' => config('pay.APPID'),
 'nonceStr' => $nonce_str,
 'package' => 'prepay_id='.$xml_to_arr['prepay_id'],
 'signType' => 'MD5',
 'timeStamp' => "$time",
 ];
 $data['timeStamp'] = "$time";//時間戳
 $data['nonceStr'] = $nonce_str;//隨機字符串
 $data['signType'] = 'MD5';//簽名算法，暫支持 MD5
 $data['package'] = 'prepay_id='.$xml_to_arr['prepay_id'];//統一下單接口返回的 prepay_id 參數值，提交格式如：prepay_id=*
 $data['paySign'] = $this->makeSign($tmp);//簽名,具體簽名方案參見微信公眾號支付幫助文檔;$data['out_trade_no'] = $out_trade_no;


 $return['status'] = 1;
 $return['info'] = $data;
 }else{
 //失敗
 $return['status'] = -1;
 $return['info'] = $xml_to_arr;
 }
 exit(json_encode($return));
 }

 //curl請求
 public function http_request($url, $data = null, $headers = array())
 {
 $curl = curl_init();
 if (count($headers) >= 1) {
 curl_setopt($curl, CURLOPT_HTTPHEADER, $headers);
 }
 curl_setopt($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;
 }

/**
 * 申請退款API
 * @param $transaction_id
 * @param double $total_fee 賬單總金額
 * @param double $refund_fee 退款金額
 * @return bool
 * @throws BaseException
 */
 public function refund()
 {

 $transaction_id = '4200000712202007274705432240';
 $total_fee = '0.01';
 $refund_fee = '0.01';
 // 當前時間
 $time = time();
 // 生成隨機字符串
 $nonceStr = md5($time . $transaction_id . $total_fee . $refund_fee);
 // API參數
 $params = [
 'appid' => config('pay.APPID'),
 'mch_id' => config('pay.MCHID'),
 'nonce_str' => $nonceStr,
 'transaction_id' => $transaction_id,
 'out_refund_no' => $time,
 'total_fee' => $total_fee * 100,
 'refund_fee' => $refund_fee * 100,
 'notify_url' => config('pay.NOTIFY_URL_REFUND'),//退款回調地址
 ];
 // 生成簽名
 $params['sign'] = $this->makeSign($params);

 tp_log('退款請求數據===>' . json_encode($params), 'refund', request()->controller());

 // 請求API
 $url = 'https://api.mch.weixin.qq.com/secapi/pay/refund';
 $result = $this->post($url, $this->toXml($params), true, $this->getCertPem());
 $prepay = $this->fromXml($result);
 // 請求失敗
 if (empty($result)) {
 throw new BaseException(['msg' => '微信退款api請求失敗']);
 }
 // 格式化返回結果
 $prepay = $this->fromXml($result);
 tp_log('退款返回數據===>' . json_encode($prepay), 'refund', request()->controller());
 // 請求失敗
// if ($prepay['return_code'] === 'FAIL') {
// throw new BaseException(['msg' => 'return_msg: ' . $prepay['return_msg']]);
// }
// if ($prepay['result_code'] === 'FAIL') {
// throw new BaseException(['msg' => 'err_code_des: ' . $prepay['err_code_des']]);
// }
 return true;
 }
 /**
 * 模擬POST請求
 * @param $url
 * @param array $data
 * @param bool $useCert
 * @param array $sslCert
 * @return mixed
 */
 public function post($url, $data = [], $useCert = false, $sslCert = [])
 {
 $header = [
 'Content-type: application/json;'
 ];
 $curl = curl_init();
 //如果有配置代理這里就設置代理
// if(WxPayConfig::CURL_PROXY_HOST != "0.0.0.0"
//  WxPayConfig::CURL_PROXY_PORT != 0){
// curl_setopt($ch,CURLOPT_PROXY, WxPayConfig::CURL_PROXY_HOST);
// curl_setopt($ch,CURLOPT_PROXYPORT, WxPayConfig::CURL_PROXY_PORT);
// }

 curl_setopt($curl, CURLOPT_URL, $url);
 curl_setopt($curl, CURLOPT_HTTPHEADER, $header);
 curl_setopt($curl, CURLOPT_HEADER, false);
 curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
 curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false);
 curl_setopt($curl, CURLOPT_POST, TRUE);
 curl_setopt($curl, CURLOPT_POSTFIELDS, $data);
 if ($useCert == true) {
 // 設置證書：cert 與 key 分別屬于兩個.pem文件
 curl_setopt($curl, CURLOPT_SSLCERTTYPE, 'PEM');
 curl_setopt($curl, CURLOPT_SSLCERT, $sslCert['certPem']);
 curl_setopt($curl, CURLOPT_SSLKEYTYPE, 'PEM');
 curl_setopt($curl, CURLOPT_SSLKEY, $sslCert['keyPem']);
 }
 $result = curl_exec($curl);
 curl_close($curl);
 return $result;
 }

/**
 * 訂單查詢
 * @param $out_trade_no
 * @return mixed
 * @throws BaseException
 */
 public function orderquery()
 {
 $transaction_id = '4200000712202007274705432240';//微信訂單號
 // 當前時間
 $time = time();
 // 生成隨機字符串
 $nonce_str = md5($time . mt_rand(00000,99999));
 //API參數
 $params = [
 'appid' => config('pay.APPID'), //公眾號ID
 'mch_id' => config('pay.MCHID'), //商戶號
 'transaction_id' => $transaction_id, //商戶訂單號
 'nonce_str' => $nonce_str, // 隨機字符串
 ];
 //生成簽名
 $params['sign'] = $this->makeSign($params);
 //請求API
 $url = 'https://api.mch.weixin.qq.com/pay/orderquery';
 $result = $this->post($url, $this->toXml($params));
 $prepay = $this->fromXml($result);
 // 請求失敗
 if ($prepay['return_code'] === 'FAIL') {
 throw new BaseException(['msg' => $prepay['return_msg'], 'code' => 0]);
 }
 if ($prepay['result_code'] === 'FAIL') {
 throw new BaseException(['msg' => $prepay['err_code_des'], 'code' => 0]);
 }
 return $prepay;
 }

/**
 * 退款查詢
 * @param $out_trade_no
 * @return mixed
 * @throws BaseException
 */
 public function refundquery()
 {
 $transaction_id = '4200000712202007274705432240';//微信訂單號
 // 當前時間
 $time = time();
 // 生成隨機字符串
 $nonce_str = md5($time . mt_rand(00000,99999));
 //API參數
 $params = [
 'appid' => config('pay.APPID'), //公眾號ID
 'mch_id' => config('pay.MCHID'), //商戶號
 'transaction_id' => $transaction_id, //商戶訂單號
 'nonce_str' => $nonce_str, // 隨機字符串
 ];
 //生成簽名
 $params['sign'] = $this->makeSign($params);
 //請求API
 $url = 'https://api.mch.weixin.qq.com/pay/refundquery';
 $result = $this->post($url, $this->toXml($params));
 $prepay = $this->fromXml($result);
 dump($prepay);die;
 // 請求失敗
 if ($prepay['return_code'] === 'FAIL') {
 throw new BaseException(['msg' => $prepay['return_msg'], 'code' => 0]);
 }
 if ($prepay['result_code'] === 'FAIL') {
 throw new BaseException(['msg' => $prepay['err_code_des'], 'code' => 0]);
 }
 return $prepay;
 }

public function index()
 {
 $data = file_get_contents('php://input');
 $data = $this->FromXml($data);
 tp_log('支付回調數據===>' . json_encode($data), 'index', request()->controller());
 // 保存微信服務器返回的簽名sign
 $data_sign = $data['sign'];
 // sign不參與簽名算法
 unset($data['sign']);
 $sign = $this->makeSign($data);//回調驗證簽名

 $str_success = 'xml>return_code>![CDATA[SUCCESS]]>/return_code>return_msg>![CDATA[OK]]>/return_msg>/xml>';
 $str_error = 'xml>return_code>![CDATA[FAIL]]>/return_code>return_msg>![CDATA[簽名失敗]]>/return_msg>/xml>';

 if (($sign === $data_sign)  ($data['return_code'] == 'SUCCESS')  ($data['result_code'] == 'SUCCESS')) {
 // 支付成功 進行你的邏輯處理
 }
echo $str_success;//str_error 告知微信 你已的邏輯處理完畢 不用再推送或再次推送你結果
 }

/*
 * 小程序 退款結果通知
 */
 public function refund(){

 $data = file_get_contents('php://input');
 $data = $this->FromXml($data);
 tp_log('退款回調數據===>' . json_encode($data), 'refund', request()->controller());

 //對加密的字符串解密
 $req_info_xml = openssl_decrypt(base64_decode($data['req_info']), 'aes-256-ecb', md5(config('pay.KEY')),OPENSSL_RAW_DATA);
 $req_info = $this->FromXml($req_info_xml);

// // 保存微信服務器返回的簽名sign
// $data_sign = $data['sign'];
// // sign不參與簽名算法
// unset($data['sign']);
// $sign = $this->makeSign($data);//回調驗證簽名
//
// $str_success = 'xml>return_code>![CDATA[SUCCESS]]>/return_code>return_msg>![CDATA[OK]]>/return_msg>/xml>';
// $str_error = 'xml>return_code>![CDATA[FAIL]]>/return_code>return_msg>![CDATA[簽名失敗]]>/return_msg>/xml>';
//
//
//
// if (($sign === $data_sign)  ($data['return_code'] == 'SUCCESS')  ($data['result_code'] == 'SUCCESS')) {
// tp_log('退款成功===>', 'refund', request()->controller());
// //去修改訂單的狀態 和支付回調的一樣 修改成功 告知微信 不在推送
// }
 }

/**
 * 生成簽名
 * @param $values
 * @return string 本函數不覆蓋sign成員變量，如要設置簽名需要調用SetSign方法賦值
 */
 private function makeSign($values)
 {
 //簽名步驟一：按字典序排序參數
 ksort($values);
 $string = $this->toUrlParams($values);
 //簽名步驟二：在string后加入KEY
 $string = $string . 'key=' . config('pay.KEY');
 //簽名步驟三：MD5加密
 $string = md5($string);
 //簽名步驟四：所有字符轉為大寫
 $result = strtoupper($string);
 return $result;
 }
 private function ToUrlParams($array)
 {
 $buff = "";
 foreach ($array as $k => $v) {
 if ($k != "sign"  $v != ""  !is_array($v)) {
 $buff .= $k . "=" . $v . "";
 }
 }
 $buff = trim($buff, "");
 return $buff;
 }

 /**
 * 輸出xml字符
 * @param $values
 * @return bool|string
 */
 private function toXml($values)
 {
 if (!is_array($values)
 || count($values) = 0
 ) {
 return false;
 }
 $xml = "xml>";
 foreach ($values as $key => $val) {
 if (is_numeric($val)) {
 $xml .= "" . $key . ">" . $val . "/" . $key . ">";
 } else {
 $xml .= "" . $key . ">![CDATA[" . $val . "]]>/" . $key . ">";
 }
 }
 $xml .= "/xml>";
 return $xml;
 }

 /**
 * 將xml轉為array
 * @param $xml
 * @return mixed
 */
 private function fromXml($xml)
 {
 // 禁止引用外部xml實體
 libxml_disable_entity_loader(true);
 return json_decode(json_encode(simplexml_load_string($xml, 'SimpleXMLElement', LIBXML_NOCDATA)), true);
 }

 /**
 * 獲取cert證書文件
 * @return array
 * @throws BaseException
 */
 private function getCertPem()
 {
// if (empty($this->config['cert_pem']) || empty($this->config['key_pem'])) {
// throw new BaseException(['msg' => '請先到后臺小程序設置填寫微信支付證書文件']);
// }
 // cert目錄
 $filePath = EXTEND_PATH.'wxpay/cert/';
 return [
 'certPem' => $filePath . 'apiclient_cert.pem',
 'keyPem' => $filePath . 'apiclient_key.pem'
 ];
 }
/**
 * 生成商戶訂單號
 */
 public function get_orderssh()
 {
 return date("YmdHis") . mt_rand(10000000, 99999999);
 }