===== PART 3/12 =====
rst();
                        
                        if (!$existing) {
                            $tracking = $this->TrafficTracking->newEntity([
                                'campaign_id' => $paidAds->ci,
                                'fingerprint' => $fingerprint,
                                'ip_address' => $userIp,
                                'user_agent' => substr($userAgent, 0, 255),
                                'created_at' => date('Y-m-d H:i:s'),
                                'expires_at' => date('Y-m-d H:i:s', time() + 60) // 1 minutes
                            ]);
                            $saved = $this->TrafficTracking->save($tracking);
                            error_log("TrafficTracking saved: " . ($saved ? 'SUCCESS' : 'FAILED'));
                        } else {
                            error_log("TrafficTracking already exists");
                        }
                    } catch (\Exception $e) {
                        error_log("TrafficTracking error: " . $e->getMessage());
                        // Continue even if tracking fails
                    }
                    
                    // Generate verification token
                    $verificationToken = bin2hex(random_bytes(16));
                    $this->set('verificationToken', $verificationToken);
                    $this->set('campaignId', $paidAds->ci);
                }

                if ($plan_disable_ads) {
                    $banner_728x90 = '';
                    $banner_468x60 = '';
                    $banner_336x280 = '';
                }

                $this->set('banner_728x90', $banner_728x90);
                $this->set('banner_468x60', $banner_468x60);
                $this->set('banner_336x280', $banner_336x280);

                $this->viewBuilder()->setLayout('go_traffic');
                $this->render('view_traffic');
            }
        }
    }

    public function popad()
    {
        $this->autoRender = false;

        if ($this->getRequest()->is('post')) {
            $pop_ad_data = data_decrypt($this->getRequest()->getData('pop_ad'));

            $this->calcEarnings($pop_ad_data, $pop_ad_data['link'], 3);

            return $this->redirect($pop_ad_data['website_url'], 301);
        }
    }

    public function go()
    {
        $this->autoRender = false;
        $this->setResponse($this->getResponse()->withType('json'));

        $ad_form_data = data_decrypt($this->getRequest()->getData('ad_form_data'));

        $t = (int)$ad_form_data['t'];
        $diff_seconds = (int)(time() - $t);
        $counter_value = (int)$ad_form_data['timer'];
        $ad_type = isset($ad_form_data['ad_type']) ? (int)$ad_form_data['ad_type'] : 0;

        // Skip timer check for traffic ads (ad_type = 4) as they don't have countdown
        if ($ad_type !== 4 && $diff_seconds < $counter_value) {
            $content = [
                'status' => 'error',
                'message' => 'Bad Request.',
                'url' => '',
            ];
            $this->setResponse($this->getResponse()->withStringBody(json_encode($content)));

            return $this->getResponse();
        }

        if (!$this->getRequest()->is('ajax')) {
            $content = [
                'status' => 'error',
                'message' => 'Bad Request.',
                'url' => '',
            ];
            $this->setResponse($this->getResponse()->withStringBody(json_encode($content)));

            return $this->getResponse();
        }

        /**
         * @var \App\Model\Entity\Link $link
         */
        $link = $this->Links->find()
            //->contain(['Users'])
            ->contain([
                'Users' => [
                    'fields' => ['id', 'username', 'status', 'disable_earnings'],
                ],
            ])
            ->where([
                'Links.alias' => $ad_form_data['alias'],
                'Links.status <>' => 3,
            ])
            ->first();
        if (!$link) {
            $content = [
                'status' => 'error',
                'message' => '404 Not Found.',
                'url' => '',
            ];
            $this->setResponse($this->getResponse()->withStringBody(json_encode($content)));

            return $this->getResponse();
        }

        $content = $this->calcEarnings($ad_form_data, $link, $ad_form_data['ad_type']);

        // Delete traffic tracking after successful link retrieval (ad_type = 4)
        if ($ad_type === 4 && isset($ad_form_data['campaign_id'])) {
            try {
                $userIp = $this->request->clientIp();
                $userAgent = $this->request->getHeaderLine('User-Agent');
                $fingerprint = md5($userIp . '_' . $userAgent);
                
                $this->loadModel('TrafficTracking');
                $deleted = $this->TrafficTracking->deleteAll([
                    'fingerprint' => $fingerprint,
                    'campaign_id' => $ad_form_data['campaign_id']
                ]);
                
                error_log("TrafficTracking deleted after get link: " . ($deleted ? 'SUCCESS' : 'NONE'));
            } catch (\Exception $e) {
                error_log("TrafficTracking delete error: " . $e->getMessage());
            }
        }

        //$content['url'] = $content['url'];

        $this->setResponse($this->getResponse()->withStringBody(json_encode($content)));

        return $this->getResponse();
    }

    protected function setRefererCookie($alias)
    {
        if (isset($_COOKIE['ref' . $alias])) {
            return;
        }

        $referer = isset($_SERVER['HTTP_REFERER']) ? $_SERVER['HTTP_REFERER'] : '';

        \setcookie('ref' . $alias, \data_encrypt($referer), \time() + 5 * 60, '/', '', false, true);
    }

    protected function getRefererCookie($alias)
    {
        $referer_url = '';
        if (isset($_COOKIE['ref' . $alias])) {
            $referer_url = \data_decrypt($_COOKIE['ref' . $alias]);