# All files / src/components/admin SecurityAlerts.tsx

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     'use client';

    import React, { useState, useEffect } from 'react';
    import { useQuery } from '@tanstack/react-query';
    import { Card, CardContent, CardHeader, CardTitle } from '@/components/ui/card';
    import { Badge } from '@/components/ui/badge';
    import { Button } from '@/components/ui/button';
    import { Alert, AlertDescription } from '@/components/ui/alert';
    import {
      AlertTriangle,
      Shield,
      Eye,
      Clock,
      MapPin,
      Monitor,
      Bell,
      X
    } from 'lucide-react';
    import { userActivityService } from '@/services/userActivity';
    import useLoadNamespace from '@/hooks/useLoadNamespace';
    import { useTranslation } from 'react-i18next';

    interface SecurityAlertData {
      username?: string;
      deviceCount?: number;
      ip?: string;
      failedAttempts?: number;
      activityCount?: number;
      [key: string]: unknown;
    }

    interface SecurityAlert {
      id: string;
      type: 'multiple_failed_logins' | 'unusual_device' | 'high_activity' | 'suspicious_ip';
      severity: 'low' | 'medium' | 'high';
      title: string;
      description: string;
      timestamp: string;
      data: SecurityAlertData;
      dismissed: boolean;
    }

    export default function SecurityAlerts() {
      useLoadNamespace('admin/securityAlerts');
      const { t } = useTranslation('admin/securityAlerts');
      const [alerts, setAlerts] = useState<SecurityAlert[]>([]);
      const [newAlertsCount, setNewAlertsCount] = useState(0);

      const { data: loginHistory } = useQuery({
        queryKey: ['login-history-alerts'],
        queryFn: async () => {
          const result = await userActivityService.getLoginHistory({ limit: 100 });
          if (result.success) {
            return result.data;
          }
          return null;
        },
        refetchInterval: 30000, // Check every 30 seconds
      });

      const { data: viewingHistory } = useQuery({
        queryKey: ['viewing-history-alerts'],
        queryFn: async () => {
          const result = await userActivityService.getViewingHistory({ limit: 100 });
          if (result.success) {
            return result.data;
          }
          return null;
        },
        refetchInterval: 30000});

      // Analyze data for security alerts
      useEffect(() => {
        if (!loginHistory?.logs) return;

        const newAlerts: SecurityAlert[] = [];
        const now = new Date();
        const oneHourAgo = new Date(now.getTime() - 60 * 60 * 1000);

        // Check for multiple failed logins from same IP
        const failedLogins = loginHistory.logs.filter(log =>
          !log.success && new Date(log.login_timestamp) > oneHourAgo
        );

        const ipFailures = failedLogins.reduce((acc, log) => {
          const ip = log.ip_address || t('securityAlerts.values.unknown');
          acc[ip] = (acc[ip] || 0) + 1;
          return acc;
        }, {} as Record<string, number>);

        Object.entries(ipFailures).forEach(([ip, count]) => {
          if (count >= 5) {
            newAlerts.push({
              id: `failed-logins-${ip}-${Date.now()}`,
              type: 'multiple_failed_logins',
              severity: count >= 10 ? 'high' : 'medium',
              title: t('securityAlerts.alerts.multipleFailedLogins.title'),
              description: t('securityAlerts.alerts.multipleFailedLogins.description', { count, ip }),
              timestamp: new Date().toISOString(),
              data: { ip, count },
              dismissed: false});
          }
        });

        // Check for users with unusual number of devices
        const userDevices = loginHistory.logs
          .filter(log => log.success && new Date(log.login_timestamp) > new Date(now.getTime() - 7 * 24 * 60 * 60 * 1000))
          .reduce((acc, log) => {
            const key = `${log.user_id}-${log.username}`;
            if (!acc[key]) {
              acc[key] = { username: log.username, devices: new Set() };
            }
            if (log.device_info) {
              acc[key].devices.add(log.device_info);
            }
            return acc;
          }, {} as Record<string, { username: string; devices: Set<string> }>);

        Object.entries(userDevices).forEach(([key, data]) => {
          if (data.devices.size >= 4) {
            newAlerts.push({
              id: `unusual-devices-${key}-${Date.now()}`,
              type: 'unusual_device',
              severity: 'medium',
              title: t('securityAlerts.alerts.unusualDevices.title'),
              description: t('securityAlerts.alerts.unusualDevices.description', { username: data.username, deviceCount: data.devices.size }),
              timestamp: new Date().toISOString(),
              data: { username: data.username, deviceCount: data.devices.size },
              dismissed: false});
          }
        });

        // Check for high activity periods
        if (viewingHistory?.logs) {
          const recentViews = viewingHistory.logs.filter(log =>
            new Date(log.start_timestamp) > oneHourAgo
          );

          if (recentViews.length >= 20) {
            newAlerts.push({
              id: `high-activity-${Date.now()}`,
              type: 'high_activity',
              severity: 'low',
              title: t('securityAlerts.alerts.highActivity.title'),
              description: t('securityAlerts.alerts.highActivity.description', { viewCount: recentViews.length }),
              timestamp: new Date().toISOString(),
              data: { viewCount: recentViews.length },
              dismissed: false});
          }
        }

        // Update alerts and count new ones
        setAlerts(prevAlerts => {
          const existingIds = new Set(prevAlerts.map(a => a.id));
          const reallyNewAlerts = newAlerts.filter(a => !existingIds.has(a.id));

          if (reallyNewAlerts.length > 0) {
            setNewAlertsCount(prev => prev + reallyNewAlerts.length);

            // Show browser notification if permission granted
            if (Notification.permission === 'granted') {
              reallyNewAlerts.forEach(alert => {
                new Notification(t('securityAlerts.browserNotification.title', { title: alert.title }), {
                  body: alert.description,
                  icon: '/favicon.ico'
                });
              });
            }
          }

          return [...prevAlerts.filter(a => !a.dismissed), ...reallyNewAlerts];
        });
      }, [loginHistory, viewingHistory]);

      // Request notification permission on mount
      useEffect(() => {
        if (Notification.permission === 'default') {
          Notification.requestPermission();
        }
      }, []);

      const dismissAlert = (alertId: string) => {
        setAlerts(prev => prev.map(alert =>
          alert.id === alertId ? { ...alert, dismissed: true } : alert
        ));
        setNewAlertsCount(prev => Math.max(0, prev - 1));
      };

      const getSeverityColor = (severity: string) => {
        switch (severity) {
          case 'high': return 'bg-red-100 text-red-800 border-red-200';
          case 'medium': return 'bg-yellow-100 text-yellow-800 border-yellow-200';
          case 'low': return 'bg-blue-100 text-blue-800 border-blue-200';
          default: return 'bg-gray-100 text-gray-800 border-gray-200';
        }
      };

      const getSeverityIcon = (type: string) => {
        switch (type) {
          case 'multiple_failed_logins': return <Shield className="h-4 w-4" />;
          case 'unusual_device': return <Monitor className="h-4 w-4" />;
          case 'high_activity': return <Eye className="h-4 w-4" />;
          case 'suspicious_ip': return <MapPin className="h-4 w-4" />;
          default: return <AlertTriangle className="h-4 w-4" />;
        }
      };

      const activeAlerts = alerts.filter(alert => !alert.dismissed);

      return (
        <Card>
          <CardHeader>
            <CardTitle className="flex items-center gap-2">
              <Bell className="h-5 w-5" />
              {t('securityAlerts.title')}
              {newAlertsCount > 0 && (
                <Badge className="bg-red-500 text-white">
                  {newAlertsCount} {t('securityAlerts.newLabel')}
                </Badge>
              )}
            </CardTitle>
          </CardHeader>
          <CardContent>
            {activeAlerts.length === 0 ? (
              <div className="text-center py-8">
                <Shield className="h-12 w-12 text-green-500 mx-auto mb-4" />
                <p className="text-sm text-muted-foreground">
                  {t('securityAlerts.noAlerts')}
                </p>
              </div>
            ) : (
              <div className="space-y-4">
                {activeAlerts.slice(0, 10).map((alert) => (
                  <Alert key={alert.id} className={getSeverityColor(alert.severity)}>
                    <div className="flex items-start justify-between">
                      <div className="flex items-start gap-3">
                        {getSeverityIcon(alert.type)}
                        <div className="flex-1">
                          <div className="flex items-center gap-2 mb-1">
                            <h4 className="font-medium">{alert.title}</h4>
                            <Badge variant="outline" className="text-xs">
                              {t(`securityAlerts.severity.${alert.severity}`)}
                            </Badge>
                          </div>
                          <AlertDescription className="text-sm">
                            {alert.description}
                          </AlertDescription>
                          <div className="flex items-center gap-2 mt-2 text-xs text-muted-foreground">
                            <Clock className="h-3 w-3" />
                            {new Date(alert.timestamp).toLocaleString()}
                          </div>
                        </div>
                      </div>
                      <Button
                        variant="ghost"
                        size="sm"
                        onClick={() => dismissAlert(alert.id)}
                        className="h-6 w-6 p-0"
                        aria-label={t('securityAlerts.dismiss')}
                      >
                        <X className="h-4 w-4" />
                      </Button>
                    </div>
                  </Alert>
                ))}

                {activeAlerts.length > 10 && (
                  <p className="text-sm text-muted-foreground text-center">
                    {t('securityAlerts.moreAlerts', { count: activeAlerts.length - 10 })}
                  </p>
                )}
              </div>
            )}
          </CardContent>
        </Card>
      );
    }