import 'dart:io';
import 'package:flutter/services.dart';
import 'package:image_picker/image_picker.dart';
import 'package:path_provider/path_provider.dart';
import 'package:path/path.dart' as path;

/// Service pour gérer l'accès aux images et vidéos
class ImageService {
  final ImagePicker _picker = ImagePicker();

  /// Sélectionner une image depuis la galerie
  Future<File?> pickImageFromGallery() async {
    try {
      final XFile? image = await _picker.pickImage(
        source: ImageSource.gallery,
        maxWidth: 1920,
        maxHeight: 1920,
        imageQuality: 90,
      );

      return image != null ? File(image.path) : null;
    } on PlatformException catch (e) {
      throw ImagePickerException('Failed to pick image: ${e.message}');
    }
  }

  /// Capturer une image avec la caméra
  Future<File?> captureImageFromCamera() async {
    try {
      final XFile? photo = await _picker.pickImage(
        source: ImageSource.camera,
        maxWidth: 1920,
        maxHeight: 1920,
        imageQuality: 90,
      );

      return photo != null ? File(photo.path) : null;
    } on PlatformException catch (e) {
      throw ImagePickerException('Failed to capture image: ${e.message}');
    }
  }

  /// Sélectionner une vidéo depuis la galerie
  Future<File?> pickVideoFromGallery() async {
    try {
      final XFile? video = await _picker.pickVideo(
        source: ImageSource.gallery,
        maxDuration: const Duration(minutes: 2),
      );

      return video != null ? File(video.path) : null;
    } on PlatformException catch (e) {
      throw ImagePickerException('Failed to pick video: ${e.message}');
    }
  }

  /// Capturer une vidéo avec la caméra
  Future<File?> captureVideoFromCamera() async {
    try {
      final XFile? video = await _picker.pickVideo(
        source: ImageSource.camera,
        maxDuration: const Duration(minutes: 2),
      );

      return video != null ? File(video.path) : null;
    } on PlatformException catch (e) {
      throw ImagePickerException('Failed to capture video: ${e.message}');
    }
  }

  /// Sauvegarder un fichier dans le dossier documents
  Future<File> saveToAppDirectory(File sourceFile, String fileName) async {
    try {
      final directory = await getApplicationDocumentsDirectory();
      final filePath = path.join(directory.path, fileName);
      return await sourceFile.copy(filePath);
    } catch (e) {
      throw ImagePickerException('Failed to save file: $e');
    }
  }

  /// Obtenir la taille d'un fichier en MB
  double getFileSizeInMB(File file) {
    return file.lengthSync() / (1024 * 1024);
  }
}

/// Exception personnalisée pour ImageService
class ImagePickerException implements Exception {
  final String message;
  ImagePickerException(this.message);

  @override
  String toString() => 'ImagePickerException: $message';
}