<?php

namespace addons\shopro_huifu\library;

use think\Db;

class HuifuConfig
{
    protected static $instance;
    protected $items = [];

    public static function getInstance()
    {
        if (!self::$instance) {
            self::$instance = new self();
        }
        return self::$instance;
    }

    public static function reload()
    {
        self::$instance = new self();
        return self::$instance;
    }

    protected function __construct()
    {
        try {
            $this->items = Db::name('shopro_huifu_config')->column('value', 'name');
        } catch (\Exception $e) {
            $this->items = [];
        }
    }

    public function all()
    {
        return $this->items;
    }

    public function get($name, $default = '')
    {
        return $this->items[$name] ?? $default;
    }

    public function getGatewayUrl()
    {
        $env = $this->get('env', 'test');
        $url = $this->get('gateway_url');
        if ($url) {
            return rtrim($url, '/');
        }
        return $env === 'prod' ? 'https://api.huifu.com' : 'https://spin-test.cloudpnr.com';
    }

    public function isProdEnv()
    {
        return $this->get('env', 'prod') !== 'test';
    }

    /**
     * 供汇付 SDK 使用：仅返回 base64 密钥体（不含 PEM 头尾）。
     * SDK 内部会自行包裹 -----BEGIN PRIVATE KEY----- 后再签名。
     */
    public function getPrivateKey()
    {
        return $this->extractKeyBody($this->get('merchant_private_key'));
    }

    public function getPublicKey()
    {
        return $this->extractKeyBody($this->get('huifu_public_key'));
    }

    public function validateKeys()
    {
        $privateBody = $this->getPrivateKey();
        $publicBody = $this->getPublicKey();
        if ($privateBody === '') {
            throw new \RuntimeException('商户RSA私钥未配置');
        }
        if ($publicBody === '') {
            throw new \RuntimeException('汇付RSA公钥未配置');
        }

        $privatePem = $this->wrapPem($privateBody, 'PRIVATE KEY');
        $privateRes = openssl_pkey_get_private($privatePem);
        if ($privateRes === false) {
            $privatePem = $this->wrapPem($privateBody, 'RSA PRIVATE KEY');
            $privateRes = openssl_pkey_get_private($privatePem);
        }
        if ($privateRes === false) {
            throw new \RuntimeException('商户RSA私钥格式无效，请从汇付控台复制完整私钥后重新保存');
        }

        $publicPem = $this->wrapPem($publicBody, 'PUBLIC KEY');
        $publicRes = openssl_pkey_get_public($publicPem);
        if ($publicRes === false) {
            throw new \RuntimeException('汇付RSA公钥格式无效，请从汇付控台复制完整公钥后重新保存');
        }

        $signature = '';
        if (!openssl_sign('huifu_key_probe', $signature, $privateRes, OPENSSL_ALGO_SHA256) || $signature === '') {
            throw new \RuntimeException('商户RSA私钥无法用于签名，请重新粘贴汇付控台商户私钥');
        }
    }

    public function shouldDelayAcct()
    {
        $split = Db::name('shopro_split_config')->column('value', 'name');
        if (($split['split_enable'] ?? '0') !== '1') {
            return false;
        }
        if (($split['delay_acct_enable'] ?? '0') !== '1') {
            return false;
        }
        if (in_array($split['split_mode'] ?? '', ['huifu', 'both'])) {
            return true;
        }
        return ($split['split_provider'] ?? 'auto') === 'huifu';
    }

    /**
     * 站点公网 HTTPS 根地址（notify 必须稳定可达，不能依赖单次 request()->root()）
     */
    public function getSiteBaseUrl()
    {
        $custom = trim((string) $this->get('site_base_url'));
        if ($custom !== '') {
            return rtrim($custom, '/');
        }

        try {
            $row = Db::name('shopro_config')->where('name', 'shopro')->find();
            if ($row && !empty($row['value'])) {
                $value = json_decode($row['value'], true);
                if (!empty($value['domain'])) {
                    $domain = rtrim((string) $value['domain'], '/');
                    if (strpos($domain, 'http') !== 0) {
                        $domain = 'https://' . ltrim($domain, '/');
                    }
                    return $domain;
                }
            }
        } catch (\Exception $e) {
            // ignore
        }

        $root = request()->root(true);
        if (strpos($root, 'https://') !== 0) {
            if (!empty($_SERVER['HTTP_X_FORWARDED_PROTO'])) {
                $scheme = trim(explode(',', (string) $_SERVER['HTTP_X_FORWARDED_PROTO'])[0]);
                if ($scheme === 'https') {
                    $root = preg_replace('#^https?://#', 'https://', $root);
                }
            }
            if (strpos($root, 'https://') !== 0 && !empty($_SERVER['HTTPS']) && $_SERVER['HTTPS'] !== 'off') {
                $root = preg_replace('#^http://#', 'https://', $root);
            }
        }

        return rtrim($root, '/');
    }

    public function getNotifyUrl($type = 'pay', $platform = 'wxMiniProgram')
    {
        if ($type === 'refund') {
            $custom = trim((string) $this->get('refund_notify_url'));
            if ($custom !== '') {
                return rtrim($custom, '/');
            }
            return $this->getSiteBaseUrl() . '/addons/shopro/pay/notifyhuifurefund/platform/' . $platform;
        }

        $custom = trim((string) $this->get('pay_notify_url'));
        if ($custom !== '') {
            return rtrim($custom, '/');
        }

        // 走 shopro 主插件路由（与 prepay 同入口，避免 shopro_huifu 子插件路由不可达）
        return $this->getSiteBaseUrl() . '/addons/shopro/pay/notifyhuifu';
    }

    protected function extractKeyBody($key)
    {
        $key = trim((string) $key);
        if ($key === '') {
            return '';
        }
        $key = preg_replace('/-----BEGIN[^-]+-----/', '', $key);
        $key = preg_replace('/-----END[^-]+-----/', '', $key);
        return preg_replace('/\s+/', '', $key);
    }

    protected function wrapPem($body, $label)
    {
        return "-----BEGIN {$label}-----\n" . wordwrap($body, 64, "\n", true) . "\n-----END {$label}-----";
    }

    public function formatGoodsDesc($orderSn)
    {
        $tpl = $this->get('goods_desc_tpl', '商城订单{order_sn}');
        return str_replace('{order_sn}', $orderSn, $tpl);
    }
}