<?php

namespace App\Services;

use Alipay\EasySDK\Kernel\CertEnvironment;
use Alipay\EasySDK\Kernel\Config;
use Alipay\EasySDK\Kernel\EasySDKKernel;
use Alipay\EasySDK\Kernel\Util\ResponseChecker;
use Alipay\EasySDK\Payment\App\Client as AppClient;
use Alipay\EasySDK\Payment\Common\Client as CommonClient;
use App\Exceptions\BizException;

class AlipayService
{
    /**
     * 支付
     *
     * @param array $params
     * @return array
     */
    public function pay(array $params)
    {
        $kernel = $this->getKernel();

        $response = (new AppClient($kernel))->pay(
            $params['subject'],
            $params['out_trade_no'],
            $params['total_amount'],
        );

        return [
            'body' => $response->body,
        ];
    }

    /**
     * 退款
     *
     * @param string $outTradeNo
     * @param string $refundSerialNumber
     * @param float $refundAmount
     * @param string $refundReason
     * @return array
     */
    public function refund(
        string $outTradeNo,
        string $refundSerialNumber,
        $refundAmount,
        ?string $refundReason = null
    ) {
        $kernel = $this->getKernel();

        $response = (new CommonClient($kernel))
                    ->optional('out_request_no', $refundSerialNumber)
                    ->optional('refund_reason', $refundReason)
                    ->refund($outTradeNo, $refundAmount);

        if (! (new ResponseChecker())->success($response)) {
            throw new BizException($response->msg.'，'.$response->subMsg);
        }
    }

    /**
     * 验证回调通知
     *
     * @param array $parameters
     * @return bool
     */
    public function verifyNotify(array $parameters = []): bool
    {
        $client = new CommonClient($this->getKernel());

        return $client->verifyNotify($parameters);
    }

    /**
     * App 支付客户端
     *
     * @return EasySDKKernel
     */
    public function getKernel(): EasySDKKernel
    {
        return new EasySDKKernel($this->getConfig());
    }

    /**
     * 获取支付宝配置信息
     *
     * @return \Alipay\EasySDK\Kernel\Config
     */
    protected function getConfig(): Config
    {
        $configs = config('alipay');

        $cfg = new Config();
        $cfg->protocol = 'https';
        $cfg->gatewayHost = 'openapi.alipay.com';
        $cfg->signType = 'RSA2';
        $cfg->appId = $configs['app_id'];
        $cfg->merchantPrivateKey = $configs['app_private_key'];
        $cfg->merchantCertPath = $configs['app_public_cert_path'];
        $cfg->alipayCertPath = $configs['public_cert_path'];
        $cfg->alipayRootCertPath = $configs['root_cert_path'];
        $cfg->notifyUrl = url(route('alipay.notify', [], false), [], true);

        $certEnvironment = new CertEnvironment();
        $certEnvironment->certEnvironment(
            $cfg->merchantCertPath,
            $cfg->alipayCertPath,
            $cfg->alipayRootCertPath
        );
        $cfg->merchantCertSN = $certEnvironment->getMerchantCertSN();
        $cfg->alipayRootCertSN = $certEnvironment->getRootCertSN();
        $cfg->alipayPublicKey = $certEnvironment->getCachedAlipayPublicKey();

        return $cfg;
    }
}