// Facial recognition integration example
interface BiometricDevice {
  deviceType: 'fingerprint' | 'facial-recognition';
  deviceId: string;
  location: string;
  status: 'active' | 'inactive';
}

const registerAttendance = async (employeeId: string, deviceId: string) => {
  // Verify biometric data
  const verified = await verifyBiometric(employeeId, deviceId);
  
  if (verified) {
    // Record attendance with timestamp
    return await recordAttendance({
      employeeId,
      timestamp: new Date(),
      deviceId,
      verificationType: 'biometric'
    });
  }
};

// Geo-fencing configuration example
const geoFenceConfig = {
  location: {
    latitude: 40.7128,
    longitude: -74.0060,
    radius: 100 // meters
  },
  allowedCheckIn: true,
  allowedCheckOut: true,
  enforceStrict: true
};

// Validate if employee is within geo-fence
const isWithinGeofence = (employeeLocation, geofence) => {
  const distance = calculateDistance(
    employeeLocation,
    geofence.location
  );
  return distance <= geofence.radius;
};

// Real-time dashboard data structure
interface AttendanceDashboard {
  totalEmployees: number;
  present: number;
  absent: number;
  onLeave: number;
  late: number;
  workingRemote: number;
  lastUpdated: Date;
}

const dashboardMetrics: AttendanceDashboard = {
  totalEmployees: 250,
  present: 235,
  absent: 5,
  onLeave: 10,
  late: 8,
  workingRemote: 45,
  lastUpdated: new Date()
};

// Shift configuration example
interface ShiftConfig {
  shiftId: string;
  name: string;
  startTime: string;
  endTime: string;
  gracePeriod: number; // minutes
  breakDuration: number; // minutes
  overtimeThreshold: number; // minutes
}

const morningShift: ShiftConfig = {
  shiftId: 'SHIFT-001',
  name: 'Morning Shift',
  startTime: '08:00',
  endTime: '17:00',
  gracePeriod: 15,
  breakDuration: 60,
  overtimeThreshold: 480 // 8 hours
};

// Notification configuration
const notificationSettings = {
  channels: ['email', 'sms', 'push', 'in-app'],
  triggers: {
    lateArrival: true,
    absence: true,
    earlyDeparture: true,
    overtime: true,
    shiftChange: true
  },
  recipients: {
    employee: ['push', 'in-app'],
    manager: ['email', 'push'],
    hr: ['email']
  }
};

// Self-service portal data example
interface EmployeeAttendanceView {
  employeeId: string;
  currentMonth: {
    daysPresent: number;
    daysAbsent: number;
    lateArrivals: number;
    overtimeHours: number;
    leavesTaken: number;
  };
  recentRecords: AttendanceRecord[];
  upcomingShifts: Shift[];
}

// Audit trail example
interface AttendanceAuditLog {
  logId: string;
  employeeId: string;
  action: 'check-in' | 'check-out' | 'edit' | 'delete';
  timestamp: Date;
  deviceInfo: {
    deviceId: string;
    deviceType: string;
    location: GeoLocation;
  };
  performedBy: string;
  changes?: Record<string, any>;
}