import 'dart:io';
import 'package:flutter/material.dart';
import 'package:google_ml_kit/google_ml_kit.dart';
import 'package:image_picker/image_picker.dart';

class FaceDetect extends StatefulWidget {
 const FaceDetect({super.key});

 @override
 _FaceDetectState createState() => _FaceDetectState();
}

class _FaceDetectState extends State<FaceDetect> {
 // String to hold the number of detected faces
 String numberOfFaces = "Faces will be counted here.";
 // Instance of Google's face detector
 final faceDetector = GoogleMlKit.vision.faceDetector();
 // File to hold the selected image
 File? _image;

 // Function to pick an image from the gallery and detect faces in it
 Future pickImage() async {
   // Pick an image
   final pickedFile =
       await ImagePicker().pickImage(source: ImageSource.gallery);
   if (pickedFile != null) {
     _image = File(pickedFile.path);
     // Prepare the image for face detection
     final inputImage = InputImage.fromFilePath(pickedFile.path);
     // Detect faces in the image
     final List<Face> faces = await faceDetector.processImage(inputImage);
     // Update the state with the number of detected faces
     setState(() {
       numberOfFaces = 'Number of faces detected: ${faces.length}';
     });
   }
 }

 // Dispose of the face detector when it's no longer needed
 @override
 void dispose() {
   faceDetector.close();
   super.dispose();
 }




 // Build the UI
 @override
 Widget build(BuildContext context) {
   return Scaffold(
     appBar: AppBar(
       title: const Text('Face Count Detection'),
     ),
     body: Center(
       child: Column(
         mainAxisAlignment: MainAxisAlignment.center,
         children: <Widget>[
           // Display the number of detected faces or a placeholder text
           Text(numberOfFaces == ''
               ? 'Faces will be counted here.'
               : numberOfFaces),
           // Display the selected image or a placeholder text
           _image == null
               ? const Text('No image selected.')
               : Padding(
                   padding: const EdgeInsets.all(12.0),
                   child: Flexible(
                     // Ensure the image fits within the available space
                     child:
                         Image.file(_image!, fit: BoxFit.contain, width: 300),
                   ),
                 ),
           // Button to pick an image and detect faces in it
           ElevatedButton(
             onPressed: pickImage,
             child: const Text('Pick Face Image'),
           ),
         ],
       ),
     ),
   );
 }
}