<?php

declare(strict_types=1);

namespace App\Repositories\Service\Payment;

use Illuminate\Support\Facades\Http;

abstract class PaymentInterface
{
    protected $_lastError = null;

    /**
     * 根据class，调用指定的实现类.
     * @param string $flag
     * @param string $payType
     */
    public static function factory($flag)
    {
        $className = self::_convertUnderline($flag);

        $className = "App\\Repositories\\Service\\Payment\\{$className}";

        if (class_exists($className)) {
            return $className::getInstance();
        } else {
            return new ErrorPayment();
        }
    }

    /**
     * 获取最后一次错误信息
     * @return
     */
    public function getLastError()
    {
        return $this->_lastError;
    }

    /**
     * @param array $data
     * @return string 成功时 返回支付链接、失败时返回空字符串 并给 lastError 赋值
     */
    abstract public function createPayLink($data = array());

    /**
     * 查单是否支付
     * @param array $data
     * @param string $orderSn
     * @param float $money
     * @param string $partnerId
     * @return bool
     */
    abstract public function queryOrder($data, &$orderSn, &$money, $partnerId);

    /**
     * @param string $orderSn 我方订单号
     * @param string $tradeNo 支付方单号
     * @param float $money 支付金额
     * @param string $partnerId 商户号
     * @return bool
     */
    abstract public function notify(&$orderSn, &$tradeNo, &$money, $partnerId);

    /**
     * 根据支付方要求输出指定内容
     */
    abstract public function stopNotify();

    /**
     * 发起http get 请求
     * @param $url
     * @return string
     */
    protected function httpGet($url, $data,)
    {
        try {
            $result = Http::withHeaders([
                'timeout' => 20,    // 超时，单位秒.
                'verify' => false,  // 是否校验SSL证书.
                'http_errors' => false, // 如果跟随http异常头部是否中断.
                'debug' => false,    // 是否启用调试模式.
                'allow_redirects' => true, // 不跟随301／302跳转.
            ])->get($url, $data);

            if ($result->successful()) {
                return $result->body();
            }
        } catch (\Exception $e) {
            return $e->getMessage();
        }
        return '';
    }

    /**
     * 发起 http post 请求
     * @param $url
     * @param $data
     * @param $formType 1.post;2.json;
     * @return string
     */
    protected function httpPost($url, $data, $formType = 1)
    {
        switch ($formType) {
            case 1:
                $asForm = 'asForm';
                break;
            case 2:
                $asForm = 'asJson';
                break;
        }

        try {
            $result = Http::withHeaders([
                'timeout' => 20,    // 超时，单位秒.
                'verify' => false,  // 是否校验SSL证书.
                'http_errors' => false, // 如果跟随http异常头部是否中断.
                'debug' => false,    // 是否启用调试模式.
                'allow_redirects' => true, // 不跟随301／302跳转.
            ])->$asForm()->post($url, $data);

            if ($result->successful()) {
                return $result->body();
            }
        } catch (\Exception $e) {
            logger($e->getMessage());
        }
        return '';
    }

    private static function _convertUnderline($str)
    {

        $string = '';

        $arr = explode('_', $str);

        foreach ($arr as $value) {
            $string .= ucfirst(strtolower($value));
        }

        return $string . 'Payment';
    }

    /**
     * 签名算法
     *
     * @param $data
     * @return string
     */
    public function getSign($data, $splicing = true)
    {
        ksort($data);
        $md5str = "";
        foreach ($data as $key => $val) {
            $md5str = $md5str . $key . "=" . $val . "&";
        }

        if ($splicing === false) {
            $md5str = substr($md5str, 0, -1);
        }

        return $md5str;
    }

    /**
     * 构建rsa私钥
     *
     * @param $privateKey
     * @return false|OpenSSLAsymmetricKey
     */
    public function setupPrvKeySign($privateKey)
    {
        $pem = chunk_split($privateKey, 64, "\n");
        $pem = "-----BEGIN RSA PRIVATE KEY-----\n" . $pem . "-----END RSA PRIVATE KEY-----\n";
        $key = openssl_pkey_get_private($pem);
        return $key;
    }

    /**
     * 构建rsa共钥
     *
     * @param $publicKey
     * @return false|OpenSSLAsymmetricKey
     */
    public function setupPubKey($publicKey)
    {
        $pem = chunk_split($publicKey, 64, "\n");
        $pem = "-----BEGIN PUBLIC KEY-----\n" . $pem . "-----END PUBLIC KEY-----";
        $key = openssl_pkey_get_public($pem);
        return $key;
    }
}