<?php

namespace Kylin\Payment\Services;

use Illuminate\Support\Facades\Request;
use Illuminate\Contracts\Container\Container;

/**
 * 安全服务类
 */
class SecurityService
{
    /**
     * 构造函数
     */
    public function __construct(
        protected readonly Container $app,
        protected readonly ConfigCacheService $configCacheService
    ) {
    }

    /**
     * 验证签名
     */
    public function verifySignature(string $type, array $data, string $signature, string $name = 'default'): bool
    {
        // 根据支付类型验证签名
        return match ($type) {
            'wechat' => $this->verifyWechatSignature($data, $signature, $name),
            'alipay' => $this->verifyAlipaySignature($data, $signature, $name),
            'unionpay' => $this->verifyUnionpaySignature($data, $signature, $name),
            'douyin' => $this->verifyDouyinSignature($data, $signature, $name),
            'jsbank' => $this->verifyJsbankSignature($data, $signature, $name),
            'alipay_global' => $this->verifyAlipayGlobalSignature($data, $signature, $name),
            'paypal' => $this->verifyPaypalSignature($data, $signature, $name),
            'stripe' => $this->verifyStripeSignature($data, $signature, $name),
            'google_pay' => $this->verifyGooglePaySignature($data, $signature, $name),
            'apple_pay' => $this->verifyApplePaySignature($data, $signature, $name),
            default => false,
        };
    }

    /**
     * 验证IP白名单
     */
    public function verifyIpWhitelist(string $type, ?string $ip = null, string $name = 'default'): bool
    {
        $ip = $ip ?? Request::ip();
        $config = $this->configCacheService->getPaymentConfig($type, $name);

        // 检查是否配置了IP白名单
        if (isset($config['ip_whitelist']) && !empty($config['ip_whitelist'])) {
            return in_array($ip, $config['ip_whitelist']);
        }

        // 未配置IP白名单，默认允许
        return true;
    }

    /**
     * 验证微信支付签名
     */
    protected function verifyWechatSignature(array $data, string $signature, string $name): bool
    {
        // 微信支付签名验证逻辑
        return true;
    }

    /**
     * 验证支付宝签名
     */
    protected function verifyAlipaySignature(array $data, string $signature, string $name): bool
    {
        // 支付宝签名验证逻辑
        return true;
    }

    /**
     * 验证银联支付签名
     */
    protected function verifyUnionpaySignature(array $data, string $signature, string $name): bool
    {
        // 银联支付签名验证逻辑
        return true;
    }

    /**
     * 验证抖音支付签名
     */
    protected function verifyDouyinSignature(array $data, string $signature, string $name): bool
    {
        // 抖音支付签名验证逻辑
        return true;
    }

    /**
     * 验证江苏银行签名
     */
    protected function verifyJsbankSignature(array $data, string $signature, string $name): bool
    {
        // 江苏银行签名验证逻辑
        return true;
    }

    /**
     * 验证支付宝国际版签名
     */
    protected function verifyAlipayGlobalSignature(array $data, string $signature, string $name): bool
    {
        // 支付宝国际版签名验证逻辑
        return true;
    }

    /**
     * 验证PayPal签名
     */
    protected function verifyPaypalSignature(array $data, string $signature, string $name): bool
    {
        // PayPal签名验证逻辑
        return true;
    }

    /**
     * 验证Stripe签名
     */
    protected function verifyStripeSignature(array $data, string $signature, string $name): bool
    {
        // Stripe签名验证逻辑
        return true;
    }

    /**
     * 验证Google Pay签名
     */
    protected function verifyGooglePaySignature(array $data, string $signature, string $name): bool
    {
        // Google Pay签名验证逻辑
        return true;
    }

    /**
     * 验证Apple Pay签名
     */
    protected function verifyApplePaySignature(array $data, string $signature, string $name): bool
    {
        // Apple Pay签名验证逻辑
        return true;
    }

    /**
     * 生成随机字符串
     */
    public function generateRandomString(int $length = 32): string
    {
        $chars = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789';
        $str = '';
        for ($i = 0; $i < $length; $i++) {
            $str .= substr($chars, mt_rand(0, strlen($chars) - 1), 1);
        }
        return $str;
    }

    /**
     * 验证请求时间戳
     */
    public function verifyTimestamp(int $timestamp, int $expire = 300): bool
    {
        return abs(time() - $timestamp) < $expire;
    }
}
