<?php

namespace addons\JoinPay\common\logic\util;


use common\helpers\FileHelper;
use Yii;
use Exception;
use addons\JoinPay\common\logic\exceptions\SDKException;
use addons\JoinPay\common\logic\entity\Request;
use addons\JoinPay\common\logic\entity\SecretKey;
use addons\JoinPay\common\logic\entity\Response;

/**
 * 汇聚扫码支付
 * Class RequestUtil
 * @package addons\JoinPay\common\logic\util
 */
class RequestUtil
{

    /**
     * POST请求
     * @param $url
     * @param $params
     * @param bool $contentType
     * @return bool|mixed|string
     */
    public static function http_post($url, $params,$contentType=false)
    {
        if (function_exists('curl_init')) {
            // curl方式
            $oCurl = curl_init();
            if (stripos($url, 'https://') !== FALSE) {
                curl_setopt($oCurl, CURLOPT_SSL_VERIFYPEER, FALSE);
                curl_setopt($oCurl, CURLOPT_SSL_VERIFYHOST, FALSE);
            }
            $string = $params;
            if (is_array($params)) {
                $aPOST = array();
                foreach ($params as $key => $val) {
                    $aPOST[] = $key . '=' . urlencode($val);
                }
                $string = join('&', $aPOST);
            }
            curl_setopt($oCurl, CURLOPT_URL, $url);
            curl_setopt($oCurl, CURLOPT_RETURNTRANSFER, 1);
            curl_setopt($oCurl, CURLOPT_POST, TRUE);
            //$contentType json处理
            if($contentType){
                $headers = array(
                    "Content-type: application/json;charset='utf-8'",
                );

                curl_setopt($oCurl, CURLOPT_HTTPHEADER, $headers);
                curl_setopt($oCurl, CURLOPT_POSTFIELDS, json_encode($params));
            }else{
                curl_setopt($oCurl, CURLOPT_POSTFIELDS, $string);
            }
            $response = curl_exec($oCurl);
            curl_close($oCurl);
            return $response;

        } elseif (function_exists('stream_context_create')) {
            // php5.3以上
            $opts = array(
                'http' => array(
                    'method' => 'POST',
                    'header' => 'Content-type: application/x-www-form-urlencoded',
                    'content' => http_build_query($params),
                )
            );
            $_opts = stream_context_get_params(stream_context_get_default());
            $context = stream_context_create(array_merge_recursive($_opts['options'], $opts));
            return file_get_contents($url, false, $context);

        } else {
            return false;
        }

    }

    /**
     * 生成签名
     * @param $params
     * @param $key
     * @param string $encryptType
     * @return string
     */
    public static function hmacRequest($params, $key, $encryptType = "1")
    {
        if ("1" == $encryptType) {
        	$str = implode("", $params) . $key;
            return md5($str);
        } else {
            $private_key = openssl_pkey_get_private($key);
            $params = implode("", $params);
            openssl_sign($params, $sign, $private_key, OPENSSL_ALGO_MD5);
            openssl_free_key($private_key);
            $sign = base64_encode($sign);
            return $sign;
        }
    }


    /**
     * 发起交易请求
     *   说明：
     *      1、此方法不会对商户私钥做任何处理，理论上不会造成私钥泄漏，如果商户觉得把私钥传递到此方法不安全，可以在调用本方法前
     *          自行调用SignUtil的相关方法为请求参数生成签名，自行调用RSAUtil的相关方法对sec_key进行加解密。
     *      2、发起请求时，如果SecretKey.reqSignKey不为空，当前方法会自动为请求参数生成签名、得到系统响应之后也会自动对响应
     *          数据进行验签，签名或验签失败会抛出 SDKException 异常
     *      3、发送请求时，如果Request中的sec_key和SecretKey.secKeyEncryptKey都不为空，会自动给sec_key加密
     *      4、得到响应时，如果Response中的sec_key和SecretKey.secKeyDecryptKey都不为空，会自动给sec_key解密
     *
     * @param string $url
     * @param Request $request
     * @param SecretKey $secretKey
     * @return Response
     * @throws SDKException
     * @throws \ReflectionException
     */
    public static function doRequest(string $url, Request $request, SecretKey $secretKey){
        //1.参数校验
        self::requestParamValid($request, $secretKey);

        if(! is_string($request->getData())){
            $request->setData(json_encode($request->getData(), JSON_UNESCAPED_UNICODE));
        }

        //2.添加签名
        if($secretKey->getReqSignKey()){
            $signStr = SignUtil::getSortedString($request, false);
            Yii::error('$signStr =' . $signStr);
            $signStr = SignUtil::sign($signStr, $request->getSignType(), $secretKey->getReqSignKey());
            Yii::error('$signStr =' . $signStr);
            $request->setSign($signStr);
        }else if(! $request->getSign()){
            throw new SDKException(SDKException::BIZ_ERROR, "请对请求参数添加签名！");
        }

        //3.如果存在sec_key，则对其进行rsa加密
        if($request->getSecKey() && $secretKey->getSecKeyEncryptKey()){
            $request->setSecKey(RSAUtil::encrypt($request->getSecKey(), $secretKey->getSecKeyEncryptKey()));
        }

        \Yii::error('$request ='.json_encode($request));

        //4.发起http请求
        $respJson = HttpUtil::postJsonSync($url, json_encode($request, JSON_UNESCAPED_UNICODE));
        if(! $respJson){
            throw new SDKException(SDKException::BIZ_ERROR, "请求完成，但响应信息为空");
        }
        \Yii::error('resp ='.json_encode($respJson));

        //5.响应结果转换
        $response = new Response();
        try{
            ObjectUtil::fillProperties($response, $respJson);
        }catch (Exception $e){
            throw new SDKException(SDKException::BIZ_ERROR, "请求完成，但响应信息转换失败: " . $e->getMessage() . "，respJson = " . $respJson);
        }

        $isOk = false;
        try{
            $signStr = SignUtil::getSortedString($response, false);
            $isOk = SignUtil::verify($signStr, $response->getSign(), $response->getSignType(), $secretKey->getRespVerifyKey());
        }catch (Exception $e){
            throw new SDKException(SDKException::BIZ_ERROR, "请求完成，但响应信息验签异常: " . $e->getMessage() . "，respJson = " . $respJson);
        }
        if($isOk !== true){
            throw new SDKException(SDKException::BIZ_ERROR, "响应信息验签不通过！ respJson = " . $respJson);
        }

        if($response->getSecKey() && $secretKey->getSecKeyDecryptKey()){
            $secKey = RSAUtil::decrypt($response->getSecKey(), $secretKey->getSecKeyDecryptKey());
            $response->setSecKey($secKey);
        }

        return $response;
    }

    /**
     * 简单参数校验
     * @param Request $request
     * @param SecretKey $secretKey
     * @throws Exception
     */
    private static function requestParamValid(Request $request, SecretKey $secretKey){
        if(! $request){
            throw new SDKException(SDKException::PARAM_ERROR, "request不能为空");
        }else if(! $request->getMethod()){
            throw new SDKException(SDKException::PARAM_ERROR, "Request.method不能为空");
        }else if(! $request->getVersion()){
            throw new SDKException(SDKException::PARAM_ERROR, "Request.version不能为空");
        }else if(! $request->getData()){
            throw new SDKException(SDKException::PARAM_ERROR, "Request.data不能为空");
        }else if(! $request->getSignType()){
            throw new SDKException(SDKException::PARAM_ERROR, "Request.sign_type不能为空");
        }else if(! $request->getMchNo()){
            throw new SDKException(SDKException::PARAM_ERROR, "Request.mch_no不能为空");
        }

        if(! $secretKey){
            throw new SDKException(SDKException::PARAM_ERROR, "secretKey不能为空");
        }else if(! $secretKey->getRespVerifyKey()){
            throw new SDKException(SDKException::PARAM_ERROR, "SecretKey.respVerifyKey不能为空");
        }
    }
}