import 'dart:io';

import 'package:http/http.dart' as http;
import 'package:open_filex/open_filex.dart';
import 'package:path_provider/path_provider.dart';

import 'download_result.dart';
import 'file_download_common.dart';

Future<DownloadResult> downloadFileFromUrlImpl(
  String url, {
  String? fileName,
  Map<String, String>? headers,
  bool openAfterDownload = false,
}) async {
  try {
    final response = await http.get(Uri.parse(url), headers: headers);
    if (response.statusCode != 200) {
      return DownloadResult.failure(
        'Download failed (${response.statusCode})',
      );
    }

    final name = fileName ?? fileNameFromUrl(url);
    final dir = await _resolveSaveDirectory();
    final file = File('${dir.path}/$name');
    await file.writeAsBytes(response.bodyBytes, flush: true);

    if (openAfterDownload) {
      await OpenFilex.open(file.path);
    }

    return DownloadResult.success(
      savedPath: file.path,
      message: openAfterDownload ? 'E-Card downloaded' : 'E-Card saved',
    );
  } catch (e) {
    return DownloadResult.failure('Could not download file');
  }
}

Future<Directory> _resolveSaveDirectory() async {
  if (Platform.isAndroid) {
    final downloads = await getDownloadsDirectory();
    if (downloads != null) return downloads;
  }
  if (Platform.isIOS) {
    return getApplicationDocumentsDirectory();
  }
  final downloads = await getDownloadsDirectory();
  return downloads ?? await getApplicationDocumentsDirectory();
}