<?php

namespace pt\controllers;

use bizHd\saas\services\StaffService;
use common\components\jwt;
use common\components\util;
use Yii;

class BaseController extends PublicController
{

    public $staff, $staffId;
    public $isLogin = false;
    public $guestAccess = [];//不需要登陆的方法名
    public $validate = true;

    public function beforeAction($action)
    {
        // 新增：全局安全检查
        $this->securityCheck();

        //6表示总后台
        Yii::$app->params['ptStyle'] = 6;
        $staffId = jwt::getLoginId();
        if (empty($staffId)) {
            $this->validate = false;
        }

        //临时开放花材管理权限给商家
        $limitId = 4;
        if (getenv('YII_ENV') == 'production') {
            $limitId = 2;
        }
        if ($staffId == $limitId) {
            $currentRoute = $this->id . '/' . $action->id;
            $arr = [
                'staff/login-detail',
                'item/list',
                'item-class/list',
                'item-class/get-all-class',
                'unit/get-all-unit',
                'upload/save-img',
                'item/add',
            ];
            if (in_array($currentRoute, $arr) == false) {
                util::fail('没有找到资源');
            }
        }

        //游客可以访问的方法
        if (in_array($action->id, $this->guestAccess)) {
            $this->validate = true;
        } else {
            $staff = StaffService::getById($staffId, true);
            if (empty($staff)) {
                util::logout();
            }
            if ($staff->status == 0) {
                util::logout("账号已冻结");
            }
            $this->staff = $staff;
        }
        if ($this->validate == false) {
            util::notLogin();
        }
        $this->staffId = $staffId;
        return parent::beforeAction($action);
    }

    /**
     * 全局安全检查
     */
    protected function securityCheck()
    {
        $request = Yii::$app->request;
        $this->checkSuspiciousParameters($request);
        $this->checkFileUploadSecurity($request);
        $this->checkSqlInjection($request);
        $this->checkXssAttack($request);
        $this->logSecurityActivity($request);
    }

    /**
     * 检查可疑参数
     */
    protected function checkSuspiciousParameters($request)
    {
        $dangerousPatterns = [
            // 代码执行相关
            '/eval\s*\(/i',
            '/exec\s*\(/i',
            '/system\s*\(/i',
            '/passthru\s*\(/i',
            '/shell_exec\s*\(/i',
            '/proc_open\s*\(/i',
            '/popen\s*\(/i',
            
            // 文件操作相关
            '/file_put_contents\s*\(/i',
            '/file_get_contents\s*\(/i',
            '/fwrite\s*\(/i',
            '/fopen\s*\(/i',
            
            // 目录遍历
            '/\.\.\//',
            '/\.\.\\\/',
            
            // 模板注入
            '/<\?php/i',
            '/<\?=/i',
            '/<\?/i',
            
            // 序列化攻击
            '/O:\d+:/',
            '/a:\d+:/',
            '/s:\d+:/',
        ];
        
        foreach (['get', 'post'] as $method) {
            $params = $request->$method();
            foreach ($params as $key => $value) {
                if (is_string($value)) {
                    foreach ($dangerousPatterns as $pattern) {
                        if (preg_match($pattern, $value)) {
                            $this->logSecurityViolation($request, "Dangerous pattern detected: $pattern in $key");
                            throw new \yii\web\HttpException(403, 'Access denied');
                        }
                    }
                }
            }
        }
    }

    /**
     * 检查文件上传安全
     */
    protected function checkFileUploadSecurity($request)
    {
        if (!empty($_FILES)) {
            foreach ($_FILES as $file) {
                if (isset($file['name'])) {
                    $ext = strtolower(pathinfo($file['name'], PATHINFO_EXTENSION));
                    $allowed = ['jpg', 'jpeg', 'png', 'gif', 'pdf', 'doc', 'docx'];
                    if (!in_array($ext, $allowed)) {
                        $this->logSecurityViolation($request, "Illegal file upload: " . $file['name']);
                        throw new \yii\web\HttpException(403, 'Illegal file type');
                    }
                }
            }
        }
    }

    /**
     * 检查SQL注入
     */
    protected function checkSqlInjection($request)
    {
        $sqlPatterns = [
            '/select\s.+\sfrom/i',
            '/union\s+select/i',
            '/insert\s+into/i',
            '/update\s.+\sset/i',
            '/delete\s+from/i',
            '/drop\s+table/i',
            '/--/',
            '/\bOR\b.+\=/i',
        ];
        foreach (['get', 'post'] as $method) {
            $params = $request->$method();
            foreach ($params as $key => $value) {
                if (is_string($value)) {
                    foreach ($sqlPatterns as $pattern) {
                        if (preg_match($pattern, $value)) {
                            $this->logSecurityViolation($request, "SQL injection pattern: $pattern in $key");
                            throw new \yii\web\HttpException(403, 'Access denied');
                        }
                    }
                }
            }
        }
    }

    /**
     * 检查XSS攻击
     */
    protected function checkXssAttack($request)
    {
        $xssPatterns = [
            '/<script\b[^>]*>(.*?)<\/script>/is',
            '/on\w+\s*=/i',
            '/javascript:/i',
            '/<iframe/i',
            '/<img/i',
        ];
        foreach (['get', 'post'] as $method) {
            $params = $request->$method();
            foreach ($params as $key => $value) {
                if (is_string($value)) {
                    foreach ($xssPatterns as $pattern) {
                        if (preg_match($pattern, $value)) {
                            $this->logSecurityViolation($request, "XSS pattern: $pattern in $key");
                            throw new \yii\web\HttpException(403, 'Access denied');
                        }
                    }
                }
            }
        }
    }

    /**
     * 记录安全日志
     */
    protected function logSecurityActivity($request)
    {
        $log = [
            'time' => date('Y-m-d H:i:s'),
            'ip' => $request->userIP,
            'url' => $request->url,
            'get' => $request->get(),
            'post' => $request->post(),
            'user_agent' => $request->userAgent,
        ];
        file_put_contents(
            Yii::getAlias('@runtime/logs/security_activity.log'),
            json_encode($log, JSON_UNESCAPED_UNICODE) . "\n",
            FILE_APPEND
        );
    }

    /**
     * 记录安全违规日志
     */
    protected function logSecurityViolation($request, $reason)
    {
        $log = [
            'time' => date('Y-m-d H:i:s'),
            'ip' => $request->userIP,
            'url' => $request->url,
            'get' => $request->get(),
            'post' => $request->post(),
            'user_agent' => $request->userAgent,
            'reason' => $reason,
        ];
        file_put_contents(
            Yii::getAlias('@runtime/logs/security_violation.log'),
            json_encode($log, JSON_UNESCAPED_UNICODE) . "\n",
            FILE_APPEND
        );
    }

}