import 'package:path_provider/path_provider.dart';
import 'dart:convert';
import 'dart:io';
class FileHandler {

  static Future<String> get localPath async {
    final directory = await getApplicationDocumentsDirectory();
    return directory.path;
  }

  static Future<File> get localFile async {
    final path = await localPath;
    return File("$path/todos.json");
  }

  static Future<dynamic> get fileContent async {
    await existCheck();
    File f = await localFile;
    String content = await f.readAsString();
    final js = await json.decode(content);
    return js;
  }

  static Future<void> saveNotified(String listName, String todoName, String notifyType, bool value) async {
    Map content = await fileContent;
    content[listName][todoName][notifyType] = value;

    await saveFile(content);
  }

  static Future<void> saveFile(js) async {
    File f = await localFile;
    String content = json.encode(js);
    f.writeAsString(content);
  }

  static Future<void> saveList(js, String listName) async {
    final content = await fileContent;
    content[listName] = js;
    await saveFile(content);
  }

  static Future<void> renameList(String oldListName, String newListName) async {
    var newJs = {};

    final content = await fileContent;
    for (String key in content.keys) {
      if (key != oldListName) {
        newJs[key] = content[key];
      } else {
        newJs[newListName] = content[key];
      }
    }
    await saveFile(newJs);
  }

  static Future<void> addList(String listName) async {
    var js = await fileContent;
    js[listName] = {};
    await saveFile(js);
  }

  static Future<void> removeList(String listName) async {
    final js = await fileContent;
    var newJs = {};
    for (String key in js.keys) {
      if (key != listName) {
        newJs[key] = js[key];
      }
    }
    await saveFile(newJs);
  }

  static Future<void> existCheck() async {
    File f = await localFile;
    bool exists = await f.exists();

    if (!exists) {
      await saveFile({"Personal": {}});
    }
  }
}