import React, { useState, useEffect } from 'react';
import axios from 'axios';
import { QRCodeSVG } from 'qrcode.react'; // Use SVG for sharp rendering
import {apiPath} from "../../auth/utils";

import {
  Box,
  Button,
  Typography,
  TextField,
  Card,
  CardContent,
  Alert,
  CircularProgress
} from '@mui/material';

const Profile = () => {
  const [qrUrl, setQrUrl] = useState('');
  const [code, setCode] = useState('');
  const [loading, setLoading] = useState(false);
  const [message, setMessage] = useState('');
  const [error, setError] = useState('');

  useEffect(() => {
    // Fetch current user or check Redux store for twoFactorEnabled
    // Hide "Enable" button if already true
  }, []);

  const start2FASetup = async () => {
    setLoading(true);
    setMessage('');
    setError('');
    try {
      const response = await axios.post(`${apiPath}/2fa/setup`, {}, {
        headers: { Authorization: `Bearer ${localStorage.getItem('accessToken')}` } // Adjust to your auth method
      });
      setQrUrl(response.data.otpauthUrl);
    } catch (err) {
      setError('Failed to start 2FA setup. Please try again.');
    } finally {
      setLoading(false);
    }
  };

  const verifyCode = async () => {
    setLoading(true);
    setMessage('');
    setError('');
    try {
      await axios.post(`${apiPath}/2fa/verify-setup`, { code }, {
        headers: { Authorization: `Bearer ${localStorage.getItem('accessToken')}` }
      });
      setMessage('2FA enabled successfully! You will now be prompted for a code on login.');
      setQrUrl('');
      setCode('');
    } catch (err) {
      setError('Invalid or expired code. Try again.');
    } finally {
      setLoading(false);
    }
  };

  return (
    <Box sx={{ maxWidth: 800, mx: 'auto', mt: 4 }}>
      <Typography variant="h4" gutterBottom>
        Profile & Security
      </Typography>

      <Card sx={{ mt: 3 }}>
        <CardContent>
          <Typography variant="h6" gutterBottom>
            Two-Factor Authentication (2FA)
          </Typography>

          {!qrUrl ? (
            <>
              <Typography variant="body1" paragraph>
                Add an extra layer of security to your account with 2FA using Microsoft Authenticator.
              </Typography>
              <Button
                variant="contained"
                color="primary"
                onClick={start2FASetup}
                disabled={loading}
              >
                {loading ? <CircularProgress size={24} /> : 'Enable 2FA'}
              </Button>
            </>
          ) : (
            <Box sx={{ textAlign: 'center', my: 4 }}>
              <Typography variant="body1" gutterBottom>
                Scan this QR code with <strong>Microsoft Authenticator</strong>:
              </Typography>
              <QRCodeSVG value={qrUrl} size={220} level="M" />
              <Typography variant="caption" display="block" sx={{ mt: 2, mb: 3 }}>
                After scanning, enter the 6-digit code from the app:
              </Typography>
              <TextField
                label="Verification Code"
                value={code}
                onChange={(e) => setCode(e.target.value.replace(/\D/g, '').slice(0, 6))}
                inputProps={{ maxLength: 6 }}
                sx={{ width: 200 }}
              />
              <Box sx={{ mt: 2 }}>
                <Button
                  variant="contained"
                  onClick={verifyCode}
                  disabled={loading || code.length !== 6}
                >
                  {loading ? <CircularProgress size={24} /> : 'Verify & Enable'}
                </Button>
              </Box>
            </Box>
          )}

          {message && <Alert severity="success" sx={{ mt: 2 }}>{message}</Alert>}
          {error && <Alert severity="error" sx={{ mt: 2 }}>{error}</Alert>}
        </CardContent>
      </Card>

      {/* Add other profile fields here later */}
    </Box>
  );
};

export default Profile;