import 'package:flutter/material.dart';
import 'package:google_fonts/google_fonts.dart';
import 'package:camera/camera.dart';
import 'dart:io';
import 'package:http/http.dart' as http;
import 'dart:convert';
import 'package:intl/intl.dart';
import 'package:image_cropper/image_cropper.dart';
import 'result_page.dart';

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

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

class _CameraPageState extends State<CameraPage> {
  CameraController? _controller;
  late List<CameraDescription> _cameras;
  bool _isCameraInitialized = false;
  bool _isUploading = false;

  @override
  void initState() {
    super.initState();
    _initializeCamera();
  }

  Future<void> _initializeCamera() async {
    _cameras = await availableCameras();
    _controller = CameraController(_cameras[0], ResolutionPreset.medium);
    await _controller!.initialize();
    if (!mounted) return;
    setState(() {
      _isCameraInitialized = true;
    });
  }

  Future<void> _captureImage() async {
    if (!_controller!.value.isInitialized) return;

    final XFile imageFile = await _controller!.takePicture();
    File? croppedImage = await _cropImage(File(imageFile.path));

    if (croppedImage != null) {
      final String date =
          DateFormat('dd-MM-yyyy HH:mm:ss').format(DateTime.now());
      _uploadImage(croppedImage, date);
    } else {
      print("❌ Cropping dibatalkan.");
    }
  }

  Future<File?> _cropImage(File imageFile) async {
    try {
      final CroppedFile? croppedFile = await ImageCropper().cropImage(
        sourcePath: imageFile.path,
        compressFormat: ImageCompressFormat.jpg,
        compressQuality: 80,
        aspectRatioPresets: [
          CropAspectRatioPreset.square,
          CropAspectRatioPreset.ratio3x2,
          CropAspectRatioPreset.original,
          CropAspectRatioPreset.ratio4x3,
          CropAspectRatioPreset.ratio16x9
        ],
        uiSettings: [
          AndroidUiSettings(
            toolbarTitle: 'Crop Gambar',
            toolbarColor: const Color(0xFF891A2D),
            toolbarWidgetColor: Colors.white,
            initAspectRatio: CropAspectRatioPreset.original,
            lockAspectRatio: false,
          ),
          IOSUiSettings(title: 'Crop Gambar'),
        ],
      );

      return croppedFile != null ? File(croppedFile.path) : null;
    } catch (e) {
      print("❌ Error saat cropping gambar: $e");
      return null;
    }
  }

  Future<void> _uploadImage(File image, String date) async {
    setState(() {
      _isUploading = true;
    });

    var request = http.MultipartRequest(
        'POST', Uri.parse('http://172.20.10.10:5000/predict'));
    request.files.add(await http.MultipartFile.fromPath('file', image.path));

    var response = await request.send();

    if (response.statusCode == 200) {
      var responseData = await response.stream.bytesToString();
      var result = json.decode(responseData);
      String prediction = result['prediction'];

      setState(() {
        _isUploading = false;
      });

      Navigator.push(
        context,
        MaterialPageRoute(
          builder: (context) => ResultPage(
            image: image,
            date: date,
            prediction: prediction,
          ),
        ),
      );
    } else {
      setState(() {
        _isUploading = false;
      });

      ScaffoldMessenger.of(context).showSnackBar(
        const SnackBar(content: Text("Terjadi kesalahan. Coba lagi.")),
      );
    }
  }

  @override
  void dispose() {
    _controller?.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        backgroundColor: Colors.transparent,
        elevation: 0,
        flexibleSpace: Container(
          decoration: const BoxDecoration(
            gradient: LinearGradient(
              colors: [Color(0xFF891A2D), Color(0xFF891A2D)],
              begin: Alignment.topLeft,
              end: Alignment.bottomRight,
            ),
          ),
        ),
        title: Text(
          "Ambil Gambar",
          style: GoogleFonts.poppins(
            color: Colors.white,
            // fontWeight: FontWeight.w600,
            fontSize: 20,
          ),
        ),
        centerTitle: true,
        iconTheme: const IconThemeData(color: Colors.white),
      ),
      body: Stack(
        children: [
          Column(
            children: [
              Expanded(
                child: Stack(
                  children: [
                    // Tampilan Kamera
                    _isCameraInitialized
                        ? CameraPreview(_controller!)
                        : const Center(child: CircularProgressIndicator()),
                    // Bingkai Panduan untuk Membantu Pengguna
                    // Center(
                    //   child: Container(
                    //     width: 300,
                    //     height: 300,
                    //     decoration: BoxDecoration(
                    //       border: Border.all(
                    //         color: Colors.white.withOpacity(0.7),
                    //         width: 2,
                    //         style: BorderStyle.solid,
                    //       ),
                    //       borderRadius: BorderRadius.circular(15),
                    //     ),
                    //     child: Center(
                    //       child: Text(
                    //         "Letakkan stroberi di sini",
                    //         style: GoogleFonts.poppins(
                    //           color: Colors.white.withOpacity(0.8),
                    //           fontSize: 14,
                    //         ),
                    //       ),
                    //     ),
                    //   ),
                    // ),
                    // Petunjuk Penggunaan dan Tombol
                    Align(
                      alignment: Alignment.bottomCenter,
                      child: Container(
                        width: double.infinity,
                        decoration: BoxDecoration(
                          color: Colors.white,
                          borderRadius: const BorderRadius.vertical(
                            top: Radius.circular(20),
                          ),
                          boxShadow: [
                            BoxShadow(
                              color: Colors.black.withOpacity(0.1),
                              blurRadius: 10,
                              spreadRadius: 5,
                            ),
                          ],
                        ),
                        padding: const EdgeInsets.all(20),
                        child: Column(
                          mainAxisSize: MainAxisSize.min,
                          children: [
                            // Petunjuk Penggunaan dalam Kartu
                            Card(
                              elevation: 3,
                              shape: RoundedRectangleBorder(
                                borderRadius: BorderRadius.circular(15),
                              ),
                              color: Colors.grey[100],
                              child: Padding(
                                padding: const EdgeInsets.all(15),
                                child: Column(
                                  crossAxisAlignment: CrossAxisAlignment.start,
                                  children: [
                                    Row(
                                      mainAxisAlignment:
                                          MainAxisAlignment.center,
                                      children: [
                                        const Icon(
                                          Icons.info_outline,
                                          color: Color(0xFF891A2D),
                                          size: 24,
                                        ),
                                        const SizedBox(width: 8),
                                        Text(
                                          "Petunjuk Penggunaan",
                                          style: GoogleFonts.poppins(
                                            fontSize: 18,
                                            fontWeight: FontWeight.bold,
                                            color: const Color(0xFF891A2D),
                                          ),
                                        ),
                                      ],
                                    ),
                                    const SizedBox(height: 10),
                                    Text(
                                      "Arahkan kamera ke buah stroberi tanpa tangkai dalam pencahayaan yang baik untuk mendapatkan hasil terbaik",
                                      textAlign: TextAlign.center,
                                      style: GoogleFonts.poppins(
                                        fontSize: 14,
                                        color: Colors.black87,
                                        height: 1.6,
                                      ),
                                    ),
                                  ],
                                ),
                              ),
                            ),
                            const SizedBox(height: 20),
                            // Tombol Ambil Gambar dengan Animasi
                            TweenAnimationBuilder(
                              tween: Tween<double>(begin: 1.0, end: 1.0),
                              duration: const Duration(milliseconds: 200),
                              builder: (context, scale, child) {
                                return Transform.scale(
                                  scale: scale,
                                  child: child,
                                );
                              },
                              child: ElevatedButton.icon(
                                onPressed: _isUploading ? null : _captureImage,
                                icon: const Icon(
                                  Icons.camera_alt,
                                  size: 28,
                                  color: Colors.white,
                                ),
                                label: Text(
                                  "Ambil Gambar",
                                  style: GoogleFonts.poppins(
                                    fontSize: 16,
                                    color: Colors.white,
                                    fontWeight: FontWeight.w600,
                                  ),
                                ),
                                style: ElevatedButton.styleFrom(
                                  backgroundColor: const Color(0xFF891A2D),
                                  padding: const EdgeInsets.symmetric(
                                      vertical: 15, horizontal: 30),
                                  shape: RoundedRectangleBorder(
                                    borderRadius: BorderRadius.circular(15),
                                  ),
                                  elevation: 5,
                                ),
                              ),
                            ),
                          ],
                        ),
                      ),
                    ),
                  ],
                ),
              ),
            ],
          ),
          // Indikator Loading
          if (_isUploading)
            Container(
              color: Colors.black.withOpacity(0.6),
              child: Center(
                child: Column(
                  mainAxisSize: MainAxisSize.min,
                  children: [
                    const CircularProgressIndicator(
                      color: Color(0xFF891A2D),
                      strokeWidth: 5,
                    ),
                    const SizedBox(height: 15),
                    Text(
                      "Mengunggah Gambar...",
                      style: GoogleFonts.poppins(
                        color: Colors.white,
                        fontSize: 16,
                        fontWeight: FontWeight.w500,
                      ),
                    ),
                  ],
                ),
              ),
            ),
        ],
      ),
    );
  }
}