from json import load, dump
from os import path
import os


class AdjustableFS:
    def __init__(self, file_path, name=None, default_value=None):
        self.file_path = file_path
        if not path.exists(self.file_path):
            if not path.exists(path.dirname(self.file_path)):
                os.mkdir(path.dirname(self.file_path))
            self._write_value(default_value)
        self.name = name

    def get_current_value(self):
        with open(self.file_path, "r") as f:
            res = load(f)
        return res["value"]

    def write_value(self, value):
        with open(self.file_path, "w") as f:
            dump({"value": value}, f, indent=4)

    def __call__(self, value=None):
        if not value is None:
            self.write_value(value)
        else:
            return self.get_current_value()

    def __repr__(self):
        return "Current value of {} at: ".format(self.name) + str(self.get_current_value())