<?php
/**
 * Created by PhpStorm.
 * User: HIAPAD
 * Date: 2018/9/25
 * Time: 10:48
 */

namespace app\common\service;

use think\Exception;
use think\facade\Config;
use wxpayNew\lib\WxPayApi;
use wxpayNew\WxPayConfig;

class WxPayService
{
	private $wxPayConfig;//配置对象
	private $unifiedOrderObj;//统一下单输入对象
	private $config;

	public function __construct()
	{
		$this->config      = Config::pull('wxpay');
		$this->wxPayConfig = new WxPayConfig($this->config);
	}

	//统一下单
	public function setWxpayOrderData($data)
	{
		$this->unifiedOrderObj = new \WxPayUnifiedOrder();
		$this->unifiedOrderObj->SetBody($data['body']);
		$this->unifiedOrderObj->SetAttach($data['attach'] ?? 'test');//设置附加数据，在查询API和支付通知中原样返回，该字段主要用于商户携带订单的自定义数据
		$this->unifiedOrderObj->SetOut_trade_no($data['out_trade_no']);
		$this->unifiedOrderObj->SetTotal_fee($data['total_fee']);
		$this->unifiedOrderObj->SetTime_start(date("YmdHis"));
		$this->unifiedOrderObj->SetTime_expire(date("YmdHis", time() + $data['time_expire']));
		$this->unifiedOrderObj->SetNotify_url($this->config['NOTIFYURL']);
		$this->unifiedOrderObj->SetTrade_type($data['trade_type']);
	}

	//统一下单
	public function unifiedOrder()
	{
		$res = WxPayApi::unifiedOrder($this->wxPayConfig, $this->unifiedOrderObj);
		if ($res['return_code'] == "SUCCESS" && $res['result_code'] == "SUCCESS") {
			//根据微信支付返回的结果进行二次签名
			//二次签名剩余参数的补充
			$result = array(
				"appid"     => $this->config['WXAPPID'],
				"partnerid" => $this->config['WXMCHID'],
				"prepayid"  => $res['prepay_id'],
				"noncestr"  => strtoupper(md5(uniqid(rand(10000, 99999)))),
				"package"   => "Sign=WXPay",
				"timestamp" => time() . ""
			);

			$sign = self::getSign($result, $this->config['WXKEY'], $this->config['SIGNTYPE']);

			$result['sign'] = $sign;
			return $result;
		} else {
			throw new Exception('支付请求出现异常');
		}
	}

	//二次签名
	private static function getSign($arr, $appkey, $signType = 'md5')
	{
		ksort($arr);

		$strInfo = '';
		foreach ($arr as $key => $val) {
			if ($val === '') {
				continue;
			}
			if ($strInfo) {
				$strInfo .= "&" . $key . "=" . $val;
			} else {
				$strInfo = $key . "=" . $val;
			}
		}
		$strInfo = trim($strInfo, "&");
		if ($signType == 'md5') {
			return strtoupper(md5($strInfo . '&key=' . $appkey));
		} elseif ($signType == 'sha1') {
			return sha1($strInfo . '&key=' . $appkey);
		} elseif ($signType == "HMAC-SHA256") {
			return hash_hmac("sha256", $strInfo . '&key=' . $appkey, $appkey);
		}

	}

	/**
	 * @param $transaction_id 微信订单号
	 * @param $total_fee 订单总金额
	 * @param $refund_fee 退款金额，不超过订单总金额
	 * @return \wxpayNew\lib\成功时返回，其他抛异常
	 * @throws Exception
	 * @throws \wxpayNew\lib\WxPayException
	 */
	public function refund($transaction_id,$total_fee,$refund_fee)
	{
		try {
			$wxPayFound = new \WxPayRefund();
			$wxPayFound->SetTransaction_id($transaction_id);
			$wxPayFound->SetTotal_fee($total_fee);
			$wxPayFound->SetRefund_fee($refund_fee);
			$wxPayFound->SetOut_refund_no("sdkphp" . date("YmdHis"));
			$wxPayFound->SetOp_user_id($this->wxPayConfig->GetMerchantId());
			$res=WxPayApi::refund($this->wxPayConfig,$wxPayFound);
			//返回结果处理
			if(isset($res['return_code'])){
				if($res['return_code']=='FAIL'){
					throw new Exception("退款申请失败,原因：".$res['return_msg']);
				}
				if($res['return_code']=='SUCCESS'){
					if($res['result_code']=='FAIL'){
						throw new Exception("退款申请失败,原因：".$res['err_code_des']);
					}
					if($res['result_code']=='SUCCESS'){
						return $res;//申请成功
					}
				}
			}
			throw new Exception('退款申请失败,原因：未知');
		}catch (Exception $e) {
			throw new Exception( $e->getMessage());
		}
	}
}