// * Shared method for saving entries to text files
// * Allows users to:
// * - Select a save directory
// * - Save entries as JSON files
// * - Persist the chosen directory for future use

import 'dart:convert';
import 'dart:io';

import 'package:fforte/enums/databases.dart';
import 'package:fforte/screens/excursion/exceptions/file_dialog_cancelled.dart';
import 'package:file_picker/file_picker.dart';
import 'package:flutter/foundation.dart';
import 'package:shared_preferences/shared_preferences.dart';

/// Helper class for saving entries to files
class SaveFileMethod {
  /// Save an entry to a text file in JSON format
  /// @param place Map containing the entry data
  /// @param id ID of the entry
  /// @param fileNameLocalization Localized prefix for the filename
  /// @param dbType The type of database (place/excursion)
  /// @throws FileDialogCancelled if user cancels directory selection
  static Future<void> saveFile(
    Map<String, String> place,
    int id,
    String fileNameLocalization,
    DatabasesEnum dbType,
  ) async {
    try {
      // Let user select save directory
      String? selectedDirectory = await FilePicker.platform.getDirectoryPath();

      if (selectedDirectory == null) {
        throw FileDialogCancelled();
      }

      // Save entry as JSON
      SharedPreferences prefs = await SharedPreferences.getInstance();
      String jsonPlace = jsonEncode(place);

      // Remember selected directory for future use
      await prefs.setString('saveDir', selectedDirectory);

      // Create file with format: prefix-id-identifier.txt
      // For places: identifier = CID
      // For excursions: identifier = date
      File file = File(
        '$selectedDirectory/$fileNameLocalization-$id-${dbType == DatabasesEnum.place ? place["CID"] : place["Datum"]!.split(" ").first}.txt',
      );

      // Write JSON data to file
      await file.writeAsString(jsonPlace);
    } catch (e) {
      debugPrint(e.toString());
      rethrow;  // Re-throw to allow proper error handling by caller
    }
  }
}