import { useState, useEffect } from 'react';
import { Capacitor } from '@capacitor/core';

// Note: Biometric auth requires native-auth plugin or similar
// For now we'll create the interface and you can install the plugin later

interface BiometricAuthResult {
  isAvailable: boolean;
  biometricType: 'fingerprint' | 'face' | 'iris' | 'none';
  authenticate: () => Promise<boolean>;
  isAuthenticated: boolean;
}

export function useBiometricAuth(): BiometricAuthResult {
  const [isAvailable, setIsAvailable] = useState(false);
  const [biometricType, setBiometricType] = useState<'fingerprint' | 'face' | 'iris' | 'none'>('none');
  const [isAuthenticated, setIsAuthenticated] = useState(false);

  useEffect(() => {
    const checkAvailability = async () => {
      if (!Capacitor.isNativePlatform()) {
        setIsAvailable(false);
        return;
      }

      // Check if biometrics are available
      // This would use @capacitor-community/native-biometric or similar
      // For now, we'll assume it's available on mobile
      setIsAvailable(true);
      setBiometricType('fingerprint'); // Default assumption
    };

    checkAvailability();
  }, []);

  const authenticate = async (): Promise<boolean> => {
    if (!isAvailable) return false;

    try {
      // This is where you'd call the actual biometric auth
      // For example with @capacitor-community/native-biometric:
      // const result = await NativeBiometric.verifyIdentity({
      //   reason: "Authenticate to access AeThex OS",
      //   title: "Biometric Authentication",
      //   subtitle: "Use your fingerprint or face",
      //   description: "Please authenticate"
      // });
      
      // For now, simulate success
      console.log('Biometric auth would trigger here');
      setIsAuthenticated(true);
      return true;
    } catch (error) {
      console.error('Biometric auth error:', error);
      setIsAuthenticated(false);
      return false;
    }
  };

  return {
    isAvailable,
    biometricType,
    authenticate,
    isAuthenticated
  };
}