<?php
namespace pay;

use think\Db;

class Ccpay
{
    private $config;
    private $apiUrl;
    private $mchNo;
    private $paySecret;

    public function __construct()
    {
        $this->config    = config('pay_list.ccpay') ?: [];
        $this->apiUrl    = $this->config['api_url']    ?? '';
        $this->mchNo     = $this->config['mch_no']     ?? '';
        $this->paySecret = $this->config['pay_secret']  ?? '';
    }

    public function getConfigInfo()
    {
        return $this->config;
    }

    public function generateSign(array $params)
    {
        unset($params['sign']);
        ksort($params);
        $str = '';
        foreach ($params as $k => $v) {
            if (is_string($v) && strlen($v) > 0) {
                $str .= "{$k}={$v}&";
            }
        }
        $str = substr($str, 0, -1) . '&paySecret=' . $this->paySecret;
        return strtoupper(md5($str));
    }

    public function verifySign(array $params)
    {
        $received = $params['sign'] ?? '';
        if (!$received) return false;
        $calculated = $this->generateSign($params);
        return hash_equals($calculated, $received);
    }

    public function createOrder($orderNo, $amount, $notifyUrl, $memberId = 'og_user', $callbackUrl = '')
    {
        $extra = [
            'bankType'        => 'OFFLINE',
            'cardType'        => '0',
            'orderPeriod'     => '30',
            'memberId'        => $memberId,
            'merchantName'    => 'OG',
            'notifyUrl'       => $notifyUrl,
            'callbackUrl'     => $callbackUrl,
        ];

        $data = [
            'tradeType'  => 'cs.pay.submit',
            'version'    => '2.0',
            'channel'    => 'union_pay',
            'mchNo'      => $this->mchNo,
            'body'       => 'online_pay',
            'mchOrderNo' => $orderNo,
            'amount'     => strval(intval($amount)),
            'currency'   => 'VND',
            'timePaid'   => date('YmdHis'),
            'remark'     => 'online-pay',
        ];

        $signParams = array_merge($data, $extra);
        $data['sign']  = $this->generateSign($signParams);
        $data['extra'] = json_encode($extra);

        addLogToFile('ccpay 下单请求: order=' . $orderNo . ' amount=' . $amount . ' params=' . json_encode($data, JSON_UNESCAPED_UNICODE), 'ccpay_request', 'ccpay');

        $result = $this->postForm($this->apiUrl, $data);

        addLogToFile('ccpay 下单返回: ' . json_encode($result, JSON_UNESCAPED_UNICODE), 'ccpay_response', 'ccpay');

        return $result;
    }

    public function queryOrder($orderNo)
    {
        $data = [
            'tradeType'  => 'cs.order.query',
            'version'    => '2.0',
            'mchNo'      => $this->mchNo,
            'mchOrderNo' => $orderNo,
        ];
        $data['sign'] = $this->generateSign($data);

        return $this->postForm($this->apiUrl, $data);
    }

    private function postForm($url, $params)
    {
        $ch = curl_init($url);
        $body = '';
        foreach ($params as $k => $v) {
            if (!is_string($v)) continue;
            $body .= $k . '=' . urlencode($v) . '&';
        }
        $body = rtrim($body, '&');

        curl_setopt_array($ch, [
            CURLOPT_RETURNTRANSFER => true,
            CURLOPT_POST           => true,
            CURLOPT_POSTFIELDS     => $body,
            CURLOPT_HTTPHEADER     => ['Content-Type: application/x-www-form-urlencoded; charset=UTF-8'],
            CURLOPT_CONNECTTIMEOUT => 10,
            CURLOPT_TIMEOUT        => 30,
            CURLOPT_SSL_VERIFYPEER => false,
            CURLOPT_SSL_VERIFYHOST => false,
        ]);

        $resp = curl_exec($ch);
        $err  = curl_error($ch);
        $code = curl_getinfo($ch, CURLINFO_HTTP_CODE);
        curl_close($ch);

        if ($resp === false) {
            addLogToFile("ccpay curl 失败: code={$code} err={$err}", 'ccpay_error', 'ccpay');
            return null;
        }

        return json_decode($resp, true);
    }
}