<?php

declare (strict_types = 1);
namespace library\utils;
// +----------------------------------------------------------------------
// | [ WE CAN DO IT MORE SIMPLE  ]
// +----------------------------------------------------------------------
// | Copyright (c) 2018-2020 rights reserved.
// +----------------------------------------------------------------------
// | Author: TABLE ME
// +----------------------------------------------------------------------
// | Date: 2020-10-04 18:31
// +----------------------------------------------------------------------

use GuzzleHttp\Exception\RequestException;
use WechatPay\GuzzleMiddleware\WechatPayMiddleware;
use WechatPay\GuzzleMiddleware\Util\PemUtil;
use GuzzleHttp\HandlerStack as HandlerStackWx;
use GuzzleHttp\Client as GuzzleHttpClient;

class wxpay {
    
    const KEY_LENGTH_BYTE = 32;
    const AUTH_TAG_LENGTH_BYTE = 16;
    
    private $config;
    private $client;
    public  $errorMsg = "操作失败";
    
    
    
    /**
     * 构造函数
     * @param type $config
     */
    public function __construct($config = [])
    {
        if(empty($config)) $config = config('wxpay');
        $this->config = $config;
        $merchantPrivateKey = PemUtil::loadPrivateKey($this->config["PrivateKey"]); // 商户私钥文件路径
        // 微信支付平台配置
        $wechatpayCertificate = PemUtil::loadCertificate($this->config["Certificate"]); // 微信支付平台证书文件路径
        // 构造一个WechatPayMiddleware
        $wechatpayMiddleware = WechatPayMiddleware::builder()
            ->withMerchant($this->config["MCHID"],$this->config["merchantSerialNumber"], $merchantPrivateKey) // 传入商户相关配置
            ->withWechatPay([ $wechatpayCertificate ]) // 可传入多个微信支付平台证书，参数类型为array
            ->build();
        // 将WechatPayMiddleware添加到Guzzle的HandlerStack中
        $stack = HandlerStackWx::create();
        $stack->push($wechatpayMiddleware, 'wechatpay');
        // 创建Guzzle HTTP Client时，将HandlerStack传入，接下来，正常使用Guzzle发起API请求，WechatPayMiddleware会自动地处理签名和验签
        $this->client = new GuzzleHttpClient(['handler' => $stack]);
    }
    /**
     * 微信小程序支付
     * @param type $post
     */
    public function wxmpPay($post=[]){
        $apiUrl = "https://api.mch.weixin.qq.com/v3/pay/transactions/jsapi";
        $jsonData = [];
        //商户信息
        $jsonData["appid"] = $this->config["APPID"];
        $jsonData["mchid"] = $this->config["MCHID"];
        $jsonData["notify_url"] = $this->config["NOTIFY_URL"];
        //必填参数
        $jsonData["description"] = $post["description"];//描述
        $jsonData["out_trade_no"] = $post["out_trade_no"];//商户订单号
        $jsonData["amount"] = [
            "total"=> floatval($post["total"])*100,//订单金额，分
        ];
//        $jsonData["scene_info"] = [//支付场景描述
//            "payer_client_ip"=>$post["payer_client_ip"],//客户端IP
//        ];
        $jsonData["time_expire"] = date("Y-m-d\TH:i:s+08:00",time()+30*60);//交易结束时间2018-06-08T10:34:56+08:00
        $jsonData["payer"]=[
            "openid"=>$post["openid"]
        ];
        $result = $this->clientHttp("POST", $apiUrl, $jsonData);
        if(empty($result)){
            $this->errorMsg = "支付错误001";
            return false;
        }
        $resuleAr = json_decode($result,true);
        if(empty($resuleAr)){
            $this->errorMsg = "支付错误002";
            return false;
        }
        if(empty($resuleAr["prepay_id"])){
            $this->errorMsg = "支付错误003";
            return false;
        }
        //组装支付参数
        $payInfo=array();
        $info['appId'] = $this->config["APPID"];
        $info['timeStamp'] = time();
        $info['nonceStr'] = $this->random_number(); //生成随机数,下面有生成实例,统一下单接口需要
        $info["package"] = "prepay_id=".$result['prepay_id'];
        $info['signType'] = 'MD5';
        $info['paySign'] = $this->MakeSign($info);
        return $info;
    }
    /**
     * h5支付
     */
    public function wapPay($post=[]){
        $apiUrl = "https://api.mch.weixin.qq.com/v3/pay/transactions/h5";
        $jsonData = [];
        //商户信息
        $jsonData["appid"] = $this->config["APPID"];
        $jsonData["mchid"] = $this->config["MCHID"];
        $jsonData["notify_url"] = $this->config["NOTIFY_URL"];
        //必填参数
        $jsonData["description"] = $post["description"];//描述
        $jsonData["out_trade_no"] = $post["out_trade_no"];//商户订单号
        $jsonData["amount"] = [
            "total"=> floatval($post["total"])*100,//订单金额，分
        ];
        $jsonData["scene_info"] = [//支付场景描述
            "payer_client_ip"=>$post["payer_client_ip"],//客户端IP
            "h5_info"=>[//h5场景信息
                "type"=>"Wap",//iOS, Android, Wap
            ]
        ];
        $jsonData["time_expire"] = date("Y-m-d\TH:i:s+08:00",time()+30*60);//交易结束时间2018-06-08T10:34:56+08:00
        $result = $this->clientHttp("POST", $apiUrl, $jsonData);
        if($result){
            $resuleAr = json_decode($result,true);
            if(empty($resuleAr) || empty($resuleAr["h5_url"])){
                $this->errorMsg = "h5_url不存在";
                return false;
            }
            return $resuleAr["h5_url"];
        }
        return false;
    }
    
    
    /**
     * app支付
     */
    public function appPay($post=[]){
        $apiUrl = "https://api.mch.weixin.qq.com/v3/pay/transactions/app";
        $jsonData = [];
        //商户信息
        $jsonData["appid"] = $this->config["APPID"];
        $jsonData["mchid"] = $this->config["MCHID"];
        $jsonData["notify_url"] = $this->config["NOTIFY_URL"];
        //必填参数
        $jsonData["description"] = $post["description"];//描述
        $jsonData["out_trade_no"] = $post["out_trade_no"];//商户订单号
        $jsonData["amount"] = [
            "total"=> floatval($post["total"])*100,//订单金额，分
        ];
        $jsonData["scene_info"] = [//支付场景描述
            "payer_client_ip"=>$post["payer_client_ip"],//客户端IP
        ];
        $jsonData["time_expire"] = date("Y-m-d\TH:i:s+08:00",time()+30*60);//交易结束时间2018-06-08T10:34:56+08:00
        $this->clientHttp("POST", $apiUrl, $jsonData);
    }
    
    
    
    
    /**
     * 商户订单号
     * @param type $out_trade_no
     */
    public function searchNotifyOrder($out_trade_no){
        $apiUrl = "https://api.mch.weixin.qq.com/v3/pay/transactions/out-trade-no/{$out_trade_no}?mchid={$this->config["MCHID"]}";
        return $this->clientHttp("GET", $apiUrl);
    }
    /**
     * 关闭支付订单
     * @param type $out_trade_no
     */
    public function closePayOrder($out_trade_no){
        $apiUrl = "https://api.mch.weixin.qq.com/v3/pay/transactions/out-trade-no/{$out_trade_no}/close";
        $postData=array(
            "out_trade_no"=>$out_trade_no,
            "mchid"=>$this->config["MCHID"],
        );
        return $this->clientHttp("POST", $apiUrl,$postData);
    }
    
    /**
     * Decrypt AEAD_AES_256_GCM ciphertext
     *
     * @param string    $associatedData     AES GCM additional authentication data
     * @param string    $nonceStr           AES GCM nonce
     * @param string    $ciphertext         AES GCM cipher text
     *
     * @return string|bool      Decrypted string on success or FALSE on failure
     */
    public function decryptToString($associatedData, $nonceStr, $ciphertext)
    {
        if (strlen($this->config['aesKey']) != self::KEY_LENGTH_BYTE) {
            $this->errorMsg = "无效的ApiV3Key，长度应为32个字节";
            return false;
        }
        
        $ciphertext = \base64_decode($ciphertext);
        if (strlen($ciphertext) <= self::AUTH_TAG_LENGTH_BYTE) {
            $this->errorMsg = "字符长度错误";
            return false;
        }
        // ext-sodium (default installed on >= PHP 7.2)
        if (function_exists('\sodium_crypto_aead_aes256gcm_is_available') && \sodium_crypto_aead_aes256gcm_is_available()) {
            return \sodium_crypto_aead_aes256gcm_decrypt($ciphertext, $associatedData, $nonceStr, $this->config['aesKey']);
        }
        // ext-libsodium (need install libsodium-php 1.x via pecl)
        if (function_exists('\Sodium\crypto_aead_aes256gcm_is_available') && \Sodium\crypto_aead_aes256gcm_is_available()) {
            return \Sodium\crypto_aead_aes256gcm_decrypt($ciphertext, $associatedData, $nonceStr, $this->config['aesKey']);
        }
        // openssl (PHP >= 7.1 support AEAD)
        if (PHP_VERSION_ID >= 70100 && in_array('aes-256-gcm', \openssl_get_cipher_methods())) {
            $ctext = substr($ciphertext, 0, -self::AUTH_TAG_LENGTH_BYTE);
            $authTag = substr($ciphertext, -self::AUTH_TAG_LENGTH_BYTE);
            return \openssl_decrypt($ctext, 'aes-256-gcm', $this->config['aesKey'], \OPENSSL_RAW_DATA, $nonceStr,$authTag, $associatedData);
        }
        $this->errorMsg = "AEAD_AES_256_GCM需要PHP 7.1以上或者安装libsodium-php";
        return false;
//        throw new \RuntimeException('AEAD_AES_256_GCM需要PHP 7.1以上或者安装libsodium-php');
    }
    
    /**
     * http提交
     */
    public function clientHttp($type='POST',$url='',$json=[]){
        $httpData = [];
        if($type == 'POST'){
            $httpData["json"] = $json;
        }
        $httpData["headers"] = ['Accept' => 'application/json'];
        $resp = $this->client->request($type,$url,$httpData);
        $statusCode = $resp->getStatusCode();
        if ($statusCode == 200) { //处理成功
            return $resp->getBody()->getContents();
        } else if ($statusCode == 204) { //处理成功，无返回Body
            $this->errorMsg = "处理成功，无返回Body";
            return false;
        }else{
            $this->errorMsg = "未知错误";
            return false;
        }
//        try{
//            $resp = $this->client->request($type,$url,$httpData);
//            $statusCode = $resp->getStatusCode();
//            var_dump($statusCode);
//            if ($statusCode == 200) { //处理成功
//                return $resp->getBody()->getContents();
//            } else if ($statusCode == 204) { //处理成功，无返回Body
//                $this->errorMsg = "处理成功，无返回Body";
//                return false;
//            }else{
//                $this->errorMsg = "未知错误";
//                return false;
//            }
//        } catch (RequestException $e){
//            var_dump($e);
//            // 进行错误处理
//            $this->errorMsg = $e->getMessage();
//            if ($e->hasResponse()) {
//                $this->errorMsg = $e->getResponse()->getBody()->getContents();
////                $this->errorMsg = "failed,resp code = " . $e->getResponse()->getStatusCode() . " return body = " . $e->getResponse()->getBody();
//            }
//            return false;
//        }
    }

    /**
     * 生成签名
     * @return 签名，本函数不覆盖sign成员变量，如要设置签名需要调用SetSign方法赋值
     */
    public function MakeSign($values) {
        //签名步骤一：按字典序排序参数
        ksort($values);
        $string = $this->ToUrlParams($values);
        //签名步骤二：在string后加入KEY
        $string = $string . "&key=" . \WxPayConfig::KEY;
        //签名步骤三：MD5加密
        $string = md5($string);
        //签名步骤四：所有字符转为大写
        $result = strtoupper($string);
        return $result;
    }
    /**
     * 参数数组转换为url参数
     * @param array $urlObj
     */
    private function ToUrlParams($urlObj) {
        $buff = "";
        foreach ($urlObj as $k => $v) {
            $buff .= $k . "=" . $v . "&";
        }
        $buff = trim($buff, "&");
        return $buff;
    }
    /**
     * 生成随机字符串
     * @param type $len
     * @param type $format
     * @return type
     */
    public function random_number($len = 21, $format = 'ALL') {
        $is_abc = $is_numer = 0;
        $password = $tmp = '';
        switch ($format) {
            case 'ALL':
                $chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789';
                break;
            case 'CHAR':
                $chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz';
                break;
            case 'NUMBER':
                $chars = '0123456789';
                break;
            default :
                $chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789';
                break;
        } 
        mt_srand((double) microtime() * 1000000 * getmypid());
        while (strlen($password) < $len) {
            $tmp = substr($chars, (mt_rand() % strlen($chars)), 1);
            if (($is_numer <> 1 && is_numeric($tmp) && $tmp > 0 ) || $format == 'CHAR') {
                $is_numer = 1;
            }
            if (($is_abc <> 1 && preg_match('/[a-zA-Z]/', $tmp)) || $format == 'NUMBER') {
                $is_abc = 1;
            }
            $password .= $tmp;
        }
        if ($is_numer <> 1 || $is_abc <> 1 || empty($password)) {
            $password = $this->random_number($len, $format);
        }
        return $password;
    }
}