import 'dart:io';

import 'package:appframe/services/dispatcher.dart';
import 'package:http/http.dart' as http;
import 'package:path_provider/path_provider.dart';

class OpenDocumentHandler extends MessageHandler {
  @override
  Future<dynamic> handleMessage(params) async {
    if (params is! Map<String, dynamic>) {
      throw Exception('参数错误');
    }
    final url = params['url'] as String?;
    if (url == null || url.isEmpty) {
      throw Exception('参数错误');
    }

    if (url.startsWith("http://")) {
      await saveNetworkImageToExternalStorage(url);
    } else {
      await saveLocalFileToExternalStorage(url);
    }
  }

  Future<bool> saveLocalFileToExternalStorage(String sourcePath) async {
    try {
      // 获取外部存储目录
      final directory = await getExternalStorageDirectory();

      // 获取文件名
      final fileName = sourcePath.split('/').last;
      var destinationPath = '${directory?.path}/$fileName';

      // 检查文件是否存在，如果存在则生成新文件名
      var counter = 1;
      while (await File(destinationPath).exists()) {
        final extension = fileName.split('.').last;
        final nameWithoutExtension = fileName.substring(0, fileName.length - extension.length - 1);
        destinationPath = '${directory?.path}/${nameWithoutExtension}_$counter.$extension}';
        counter++;
      }

      // 复制文件
      final sourceFile = File(sourcePath);
      await sourceFile.copy(destinationPath);

      return true;
    } catch (e) {
      print('保存文件失败: $e');
      return false;
    }
  }

  Future<bool> saveNetworkImageToExternalStorage(String imageUrl) async {
    try {
      // 获取外部存储目录
      final directory = await getExternalStorageDirectory();

      // 从URL获取文件名
      final fileName = imageUrl.split('/').last;
      var filePath = '${directory?.path}/$fileName';

      // 检查文件是否存在，如果存在则生成新文件名
      var counter = 1;
      while (await File(filePath).exists()) {
        final extension = fileName.split('.').last;
        final nameWithoutExtension = fileName.substring(0, fileName.length - extension.length - 1);
        filePath = '${directory?.path}/${nameWithoutExtension}_$counter.$extension}';
        counter++;
      }

      // 下载网络图片
      final response = await http.get(Uri.parse(imageUrl));

      if (response.statusCode == 200) {
        // 保存到外部存储
        final file = File(filePath);
        await file.writeAsBytes(response.bodyBytes);
        return true;
      } else {
        print('下载失败: ${response.statusCode}');
        return false;
      }
    } catch (e) {
      print('保存失败: $e');
      return false;
    }
  }
}