<?php
declare(strict_types=1);

namespace Soon\Api\Services;

/**
 * 从 storage/payment/*.pem 合并支付密钥到 Config。
 */
final class PaymentConfigLoader
{
    public static function merge(array &$config): void
    {
        $dir = SOON_SERVER_ROOT . '/storage/payment';
        if (!is_dir($dir)) {
            return;
        }

        $map = [
            'alipay_private_key.pem' => ['alipay', 'private_key'],
            'alipay_public_key.pem' => ['alipay', 'public_key'],
            'wechat_mch_private_key.pem' => ['wechat', 'mch_private_key'],
            'wechat_api_v3_key.pem' => ['wechat', 'api_v3_key'],
            'wechat_platform_cert.pem' => ['wechat', 'platform_cert'],
        ];

        foreach ($map as $file => [$section, $key]) {
            $path = $dir . '/' . $file;
            if (!is_file($path)) {
                continue;
            }
            $content = trim((string)file_get_contents($path));
            if ($content === '') {
                continue;
            }
            if (!isset($config[$section]) || !is_array($config[$section])) {
                $config[$section] = [];
            }
            $config[$section][$key] = $content;
        }
    }
}